Form 424B5 SEMPRA

Filed Pursuant to Rule 424(b)(5)
Registration No. 333-295948

TABLE OF CONTENTS

PROSPECTUS SUPPLEMENT

PROSPECTUS

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ABOUT THIS PROSPECTUS SUPPLEMENT

This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of this offering of the notes and also adds to and updates information contained in the accompanying prospectus and the documents incorporated by reference in this prospectus supplement and the accompanying prospectus. The second part is the accompanying prospectus, which gives more general information, some of which does not apply to the notes. If the description of the notes or this offering of the notes varies between this prospectus supplement and the accompanying prospectus, you should rely on the information in this prospectus supplement.

You should rely only on the information contained or incorporated by reference in this prospectus supplement, the accompanying prospectus and any related free writing prospectus issued by us. We have not, and the underwriters have not, authorized anyone to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are offering to sell the notes and seeking offers to buy the notes only in jurisdictions where offers and sales are permitted. You should assume that the information contained in this prospectus supplement, the accompanying prospectus and any such free writing prospectus is accurate only as of their respective dates (or such other dates specified therein) and the information contained in documents incorporated by reference is accurate only as of the respective dates (or such other dates specified therein) of those documents, in each case regardless of the time of delivery of this prospectus supplement or the accompanying prospectus or any such free writing prospectus or any sale of the notes. Our business, financial condition, results of operations and prospects may have changed since those dates.

The distribution of this prospectus supplement, the accompanying prospectus and any related free writing prospectus filed with the U.S. Securities and Exchange Commission (the “SEC”) and this offering of the notes in certain jurisdictions may be restricted by law. Persons into whose possession this prospectus supplement, the accompanying prospectus and any such free writing prospectus come should inform themselves about and observe any such restrictions. This prospectus supplement, the accompanying prospectus and any such free writing prospectus do not constitute, and may not be used in connection with, an offer or solicitation by anyone in any jurisdiction in which such offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so or to any person to whom it is unlawful to make such offer or solicitation.

Notice to Prospective Investors in the European Economic Area

None of this prospectus supplement, the accompanying prospectus or any related free writing prospectus is a prospectus for the purposes of Regulation (EU) 2017/1129, as amended (the “Prospectus Regulation”). This prospectus supplement, the accompanying prospectus and any related free writing prospectus have been prepared on the basis that any offer of notes in any Member State of the European Economic Area (the “EEA”) will only be made to a legal entity which is a qualified investor under the Prospectus Regulation (each, an “EEA Qualified Investor”). Accordingly, any person making or intending to make an offer in any Member State of the EEA of notes which are the subject of the offering contemplated in this prospectus supplement, the accompanying prospectus and any related free writing prospectus may only do so with respect to EEA Qualified Investors. Neither Sempra nor the underwriters have authorized, nor do they authorize, the making of any offer of notes in the EEA other than to EEA Qualified Investors.

PROHIBITION OF SALES TO EEA RETAIL INVESTORS – The notes are not intended to be offered, sold or otherwise made available to and should not be offered, sold or otherwise made available to any retail investor in the EEA. For these purposes, a “retail investor” means a person who is one (or more) of: (i) a retail client as defined in point (11) of Article 4(1) of Directive 2014/65/EU, as amended (“MiFID II”); or (ii) a customer within the meaning of Directive (EU) 2016/97, as amended (the “Insurance Distribution Directive”), where that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II; or (iii) not an EEA Qualified Investor. Consequently, no key information document required by Regulation (EU) No 1286/2014, as amended (the “PRIIPs Regulation”) for offering or selling the notes or otherwise making

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them available to retail investors in the EEA has been prepared and therefore offering or selling the notes or otherwise making them available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation.

Notice to Prospective Investors in the United Kingdom

This prospectus supplement, the accompanying prospectus and any related free writing prospectus have been prepared on the basis that any offer of notes in the United Kingdom will only be made to a legal entity which is a qualified investor as defined in paragraph 15 of Schedule 1 to the United Kingdom’s Public Offers and Admissions to Trading Regulations 2024 (each, a “UK Qualified Investor”). Accordingly, any person making or intending to make an offer in the United Kingdom of notes which are the subject of the offering contemplated in this prospectus supplement, the accompanying prospectus and any related free writing prospectus may only do so with respect to UK Qualified Investors. Neither Sempra nor the underwriters have authorized, nor do they authorize, the making of any offer of notes in the United Kingdom other than to UK Qualified Investors.

PROHIBITION OF SALES TO UNITED KINGDOM RETAIL INVESTORS – The notes are not intended to be offered, sold, distributed or otherwise made available to and should not be offered, sold, distributed or otherwise made available to any retail investor in the United Kingdom. For these purposes, a “retail investor” means a person who is either one (or both) of the following: (i) not a professional client, as defined in point (8) of Article 2(1) of Regulation (EU) No 600/2014 as it forms part of domestic law in the United Kingdom (“UK MiFIR”); or (ii) not a UK Qualified Investor. Consequently, no disclosure document required by the FCA Product Disclosure Sourcebook (“DISC”) for offering, selling or distributing the notes or otherwise making them available to retail investors in the United Kingdom has been prepared and therefore offering or selling the notes or otherwise making them available to any retail investor in the United Kingdom may be unlawful under DISC and the Consumer Composite Investments (Designated Activities) Regulations 2024.

The communication of this prospectus supplement, the accompanying prospectus, any related free writing prospectus and any other document or materials relating to the issue of the notes offered hereby is not being made, and this prospectus supplement, the accompanying prospectus, any related free writing prospectus and such other documents and/or materials have not been approved, by an authorized person for the purposes of section 21 of the United Kingdom’s Financial Services and Markets Act 2000, as amended (the “FSMA”). Accordingly, this prospectus supplement, the accompanying prospectus, any related free writing prospectus and such other documents and/or materials are not being distributed to, and must not be passed on to, the general public in the United Kingdom. This prospectus supplement, the accompanying prospectus, any related free writing prospectus and such other documents and/or materials are for distribution only to persons who (i) have professional experience in matters relating to investments and who fall within the definition of investment professionals (as defined in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Financial Promotion Order”)), (ii) fall within Article 49(2)(a) to (d) of the Financial Promotion Order, (iii) are outside the United Kingdom, or (iv) are any other persons to whom it may otherwise lawfully be communicated or distributed under the Financial Promotion Order (all such persons together being referred to as “relevant persons”). This prospectus supplement, the accompanying prospectus, any related free writing prospectus and such other documents and/or related materials are directed only at relevant persons and must not be acted on or relied on by persons who are not relevant persons. Any investment or investment activity to which this prospectus supplement, the accompanying prospectus, any related free writing prospectus and any such other documents and/or materials relate will be engaged in only with relevant persons. Any person in the United Kingdom that is not a relevant person should not act or rely on this prospectus supplement, the accompanying prospectus, any related free writing prospectus or any other documents and/or materials relating to the issue of the notes offered hereby or any of their contents.

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FORWARD-LOOKING STATEMENTS AND MARKET DATA

This prospectus supplement, the accompanying prospectus and the documents they incorporate by reference contain, and any related free writing prospectus issued by us may contain, forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are based on assumptions about the future, involve risks and uncertainties, and are not guarantees. Future results may differ materially from those expressed or implied in any forward-looking statement. These forward-looking statements represent our estimates and assumptions only as of the respective dates of the documents in which such forward-looking statements appear. We assume no obligation to update or revise any forward-looking statement as a result of new information, future events or otherwise.

Forward-looking statements can be identified by words such as “believe,” “expect,” “intend,” “anticipate,” “contemplate,” “plan,” “estimate,” “project,” “forecast,” “envision,” “should,” “could,” “would,” “will,” “confident,” “may,” “can,” “potential,” “possible,” “proposed,” “in process,” “construct,” “develop,” “opportunity,” “preliminary,” “pro forma,” “strategic,” “initiative,” “target,” “outlook,” “optimistic,” “poised,” “positioned,” “maintain,” “continue,” “progress,” “advance,” “goal,” “aim,” “commit,” or similar expressions, or when we discuss our guidance, priorities, strategies, goals, vision, mission, projections, intentions or expectations.

Factors, among others, that could cause actual results and events to differ materially from those expressed or implied in any forward-looking statement include:

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We caution you not to rely unduly on any forward-looking statements. You should review and consider carefully the risks, uncertainties and other factors that affect our businesses as described herein, in our Annual Report on Form 10-K for the year ended December 31, 2025, in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, and in other reports and documents we file with the SEC that are incorporated by reference in this prospectus supplement and the accompanying prospectus and any related free writing prospectus issued by us. You may obtain copies of these reports and documents as described under “Where You Can Find More Information” in the accompanying prospectus.

This prospectus supplement, the accompanying prospectus, the documents incorporated and deemed to be incorporated by reference in this prospectus supplement and the accompanying prospectus and any related free writing prospectus issued by us in connection with this offering may contain or incorporate by reference market, demographic and industry data and forecasts that are based on or derived from independent industry publications, publicly available information, government data and other information from third parties or that have been compiled or prepared by our management or employees. We do not guarantee the accuracy or completeness of any of this information, and we have not independently verified any of the information provided by third-party sources. In addition, market, demographic and industry data and forecasts that may be contained or incorporated by reference in this prospectus supplement, the accompanying prospectus, the documents incorporated and deemed to be incorporated by reference in this prospectus supplement and the accompanying prospectus and any

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related free writing prospectus may involve estimates, assumptions and other uncertainties and are subject to change based on various factors, including those discussed under this heading “Forward-Looking Statements and Market Data,” under the heading “Risk Factors,” and under similar headings in this prospectus supplement, the accompanying prospectus, any related free writing prospectus, and documents that are incorporated or deemed to be incorporated by reference in this prospectus supplement and the accompanying prospectus. Accordingly, you should not place undue reliance on any of this information.

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RISK FACTORS

Investing in the notes involves risks. Before deciding whether to purchase any of the notes, you should review and consider carefully the risks described below and the risk factors and other cautionary language incorporated in this prospectus supplement and the accompanying prospectus by reference to our most recent Annual Report on Form 10-K, any subsequent Quarterly Reports on Form 10-Q and any Current Reports on Form 8-K filed (and not furnished) by us with the SEC subsequent to the last day of the fiscal year covered by our most recent Annual Report on Form 10-K and all other information contained or incorporated by reference in this prospectus supplement and the accompanying prospectus, as updated by our subsequent filings under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), that are incorporated by reference in this prospectus supplement and the accompanying prospectus, as well as any free writing prospectus we may provide you in connection with this offering. Please also carefully read the information under the heading “Forward-Looking Statements and Market Data” or any similar headings in this prospectus supplement, the accompanying prospectus, our most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q and Current Reports on Form 8-K filed (and not furnished) by us with the SEC subsequent to the last day of the fiscal year covered by our most recent Annual Report on Form 10-K. There may be other risks and uncertainties not known to us or that we deem immaterial that also could impair our business operations, financial results and the value of our securities. The occurrence of any of these risks could have a material adverse effect on our results of operations, financial condition, cash flows and/or prospects and might cause you to lose all or part of your investment in the notes. In that regard, unless otherwise expressly stated or the context otherwise requires, references to our indebtedness generally or our senior indebtedness appearing under this heading “Risk Factors” and similar headings in our most recent Annual Report on Form 10-K include the notes offered hereby.

The notes will be effectively subordinated in right of payment to all indebtedness and other liabilities and any preferred equity of Sempra’s subsidiaries, and the indenture under which the notes will be issued does not limit the aggregate amount of indebtedness and other liabilities that Sempra and its subsidiaries may incur.

The notes will be the unsecured and unsubordinated obligations of Sempra, and will be obligations of Sempra exclusively and will not be the obligations of any of its consolidated entities, equity method investees or other affiliates. Because Sempra is a holding company and substantially all the assets that produce Sempra’s earnings are owned by its consolidated subsidiaries or its equity method investees, which are entities Sempra does not control, the notes will be effectively subordinated in right of payment to all existing and future indebtedness and other liabilities and any preferred equity of Sempra’s subsidiaries. At March 31, 2026, Sempra’s consolidated subsidiaries had total indebtedness and other liabilities of approximately $53.6 billion owing to unaffiliated third parties, to which the notes would be effectively subordinated in right of payment. The notes will also be effectively subordinated in right of payment to any secured indebtedness we have or may incur (to the extent of the value of the collateral securing such secured indebtedness).

The indenture under which the notes will be issued does not limit the amount of indebtedness (including secured indebtedness) and other liabilities that may be incurred by Sempra or any of its subsidiaries. The incurrence by Sempra or its subsidiaries of additional indebtedness and liabilities may have adverse consequences for you as a holder of the notes, including making it more difficult for Sempra to satisfy its obligations with respect to the notes, a loss of all or part of the trading value of your notes and the risk that one or more of the credit ratings on the notes could be lowered or withdrawn. Both Sempra and its subsidiaries expect to incur substantial amounts of additional indebtedness in the future.

SOFR (as defined below) may be more volatile than other benchmark or market rates.

Since the initial publication of SOFR, daily changes in SOFR have, on occasion, been more volatile than daily changes in other benchmark or market rates, such as United States dollar London Inter-bank Offered Rate. Although changes in Compounded SOFR generally are not expected to be as volatile as changes in daily levels of SOFR, the return on and value of the notes may fluctuate more than floating rate debt securities that are linked to

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less volatile rates. In addition, the volatility of SOFR has reflected the underlying volatility of the overnight United States Treasury repurchase agreement (“repo”) market. The Federal Reserve Bank of New York has at times conducted operations in the overnight United States Treasury repo market in order to help maintain the federal funds rate within a target range. The Federal Reserve Bank of New York may not continue to conduct such operations in the future, and the duration and extent of any such operations is inherently uncertain. The effect of any such operations, or of the cessation of such operations to the extent they are commenced, is uncertain and could be materially adverse to investors in the notes.

The interest rate on the notes is based on a Compounded SOFR rate and the SOFR Index (as defined below), both of which have a limited history in the marketplace.

For each Interest Period (as defined below), the interest rate on the notes is based on Compounded SOFR, which is calculated using the SOFR Index published by the Federal Reserve Bank of New York according to the specific formula described under the heading “Description of the Notes—Compounded SOFR and the SOFR Index,” not the SOFR rate published on or in respect of a particular date during such Interest Period or an arithmetic average of SOFR rates during such period. For this and other reasons, the interest rate on the notes during any Interest Period will not necessarily be the same as the interest rate on other SOFR-linked investments that use an alternative basis to determine the applicable interest rate. Further, if the SOFR rate in respect of a particular date during an Interest Period is negative, its contribution to the SOFR Index will be less than one, resulting in a reduction to Compounded SOFR used to calculate the interest payable on the notes on the Interest Payment Date (as defined below) for such Interest Period.

Limited market precedent exists for securities that use SOFR as part of the interest rate calculation and the method for calculating an interest rate based upon SOFR in those precedents varies. In addition, the Federal Reserve Bank of New York only began publishing the SOFR Index in March 2020. Accordingly, the use of the SOFR Index or the specific formula for the Compounded SOFR rate used in the notes may not continue to be utilized by other market participants. If the market adopts a different calculation method, that would likely adversely affect the liquidity and market value of the notes.

Compounded SOFR with respect to a particular Interest Period will only be determinable near the end of the relevant Interest Period.

The level of Compounded SOFR applicable to a particular Interest Period and, therefore, the amount of interest payable with respect to such Interest Period will be determined on the Interest Payment Determination Date (as defined below) for such Interest Period. Because each such date is near the end of such Interest Period, investors will not know the amount of interest payable with respect to a particular Interest Period until shortly prior to the related Interest Payment Date and it may be difficult for an investor to reliably estimate the amount of interest that will be payable on each such Interest Payment Date.

The SOFR Index may be modified or discontinued and the notes may bear interest by reference to a rate other than Compounded SOFR, which could adversely affect the notes.

The SOFR Index is published by the Federal Reserve Bank of New York based on data received by it from sources other than Sempra, and Sempra has no control over its methods of calculation, publication schedule, rate revision practices or availability of the SOFR Index at any time. Particularly given its relatively recent introduction, the SOFR Index may be discontinued or fundamentally altered in a manner that is materially adverse to the interests of investors in the notes. If the manner in which the SOFR Index is calculated, including the manner in which SOFR is calculated, is changed, that change may result in a reduction in the amount of interest payable on the notes and the trading prices of the notes. In addition, the Federal Reserve Bank of New York may withdraw, modify or amend the published SOFR Index or SOFR data in its sole discretion and without notice. The interest rate for any Interest Period will not be adjusted for any modifications or amendments to the SOFR Index or SOFR data that the Federal Reserve Bank of New York may publish after the interest rate for that Interest Period has been determined.

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If Sempra (or its designee (which may be an independent financial advisor or any other designee of Sempra) (any of such entities, a “Designee”)) determines that a Benchmark Transition Event (as defined below) and its related Benchmark Replacement Date (as defined below) have occurred with respect to determining Compounded SOFR, then the interest rate on the notes will no longer be determined by reference to the SOFR Index, but instead will be determined by reference to a different rate, plus a spread adjustment, which is referred to as a “Benchmark Replacement” (as defined below), as further described under the heading “Description of the Notes—Effect of Benchmark Transition Event.” If a particular Benchmark Replacement or Benchmark Replacement Adjustment (as defined below) cannot be determined, then the next-available Benchmark Replacement or Benchmark Replacement Adjustment will apply. These replacement rates and adjustments may be selected, recommended or formulated by (i) the Relevant Governmental Body (as defined below) (such as the Alternative Reference Rates Committee), (ii) the International Swaps and Derivatives Association (the “ISDA”) or (iii) in certain circumstances, Sempra (or its Designee). Upon the occurrence of a Benchmark Transition Event and its related Benchmark Replacement Date, the terms of the notes expressly authorize Sempra (or its Designee), without approval of the holders of the notes, to make Benchmark Replacement Conforming Changes (as defined below) with respect to, among other things, changes to the definition or interpretation of “Interest Period,” the timing and frequency of determining rates and making payments of interest, rounding of amounts or tenors and other administrative matters. The determination of a Benchmark Replacement, the calculation of the interest rate on the notes by reference to a Benchmark Replacement (including the application of a Benchmark Replacement Adjustment), any implementation of Benchmark Replacement Conforming Changes and any other determinations, decisions or elections that may be made under the terms of the notes in connection with a Benchmark Transition Event could adversely affect the value of the notes, the return on the notes and the price at which an investor can sell the notes.

In addition, (i) the composition and characteristics of the Benchmark Replacement will not be the same as those of Compounded SOFR, the Benchmark Replacement may not be the economic equivalent of Compounded SOFR, the Benchmark Replacement may not perform in the same way as Compounded SOFR would have performed at any time and the Benchmark Replacement may not be a comparable substitute for Compounded SOFR (each of which means that a Benchmark Transition Event could adversely affect the value of the notes, the return on the notes and the price at which an investor can sell the notes), (ii) any failure of the Benchmark Replacement to gain market acceptance could adversely affect the value of the notes, (iii) the Benchmark Replacement may have a very limited history and the future performance of the Benchmark Replacement may not be predictable based on historical performance, (iv) the secondary trading market for notes linked to the Benchmark Replacement may be limited and (v) the administrator of the Benchmark Replacement may make changes that could change the value of the Benchmark Replacement or discontinue the Benchmark Replacement and has no obligation to consider investors’ interests in doing so.

Upon the occurrence of a Benchmark Transition Event and its related Benchmark Replacement Date, Sempra (or its Designee) will make certain determinations with respect to the notes, which determinations may adversely affect the notes.

If a Benchmark Transition Event and its related Benchmark Replacement Date have occurred, Sempra (or its Designee) will make certain determinations with respect to the notes in its (or its Designee’s) sole discretion as further described under the heading “Description of the Notes—Effect of Benchmark Transition Event.” Any determination, decision or election pursuant to the benchmark replacement provisions not made by Sempra’s Designee will be made by Sempra. Any of these determinations may adversely affect the value of the notes, the return on the notes and the price at which an investor can sell the notes. Moreover, certain determinations may require the exercise of discretion and the making of subjective judgments, such as with respect to Compounded SOFR or the occurrence or non-occurrence of a Benchmark Transition Event and any Benchmark Replacement Conforming Changes. These potentially subjective determinations may adversely affect the value of the notes, the return on the notes and the price at which an investor can sell the notes. For further information regarding these types of determinations, see “Description of the Notes—Effect of Benchmark Transition Event.”

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USE OF PROCEEDS

We estimate that the net proceeds to us from the sale of the notes will be approximately $    million after deducting the underwriting discount but before deducting estimated offering expenses payable by us. We intend to use a substantial portion of the net proceeds from this offering to repay outstanding commercial paper and potentially other indebtedness and to use any remaining net proceeds for other general corporate purposes. As of June 3, 2026, such commercial paper bore interest at rates of 4.186% per annum or less and will mature at various dates in June 2026. We estimate that our expenses for this offering, excluding the underwriting discount, will be approximately $1.7 million.

Pending application of the net proceeds from this offering for the foregoing intended purposes, we expect to invest such net proceeds in various instruments which may include, but would not be limited to, short- and intermediate-term, interest-bearing obligations, including bank deposits and certificates of deposit with financial institutions having investment-grade ratings, U.S. government obligations or money market funds primarily invested in securities issued by the U.S. government or its agencies.

As described above, we intend to use a substantial portion of the net proceeds from this offering to repay outstanding commercial paper and potentially other indebtedness and to use any remaining net proceeds for other general corporate purposes. None of the underwriters participating in this offering and/or their affiliates hold a position in our commercial paper but may hold positions in other indebtedness of ours, one of the underwriters acts as a dealer under our commercial paper program, and affiliates of one of the underwriters participating in this offering are lenders under our credit facilities. To the extent that net proceeds from this offering are applied to repay any of our outstanding indebtedness (including commercial paper, bank loans or other indebtedness) held by any of the underwriters or their affiliates, they will receive proceeds from this offering through the repayment of that indebtedness. If the amount of such proceeds so received by any underwriter or its affiliates is 5% or more of the net proceeds of this offering (not including the underwriting discount), such underwriter would be deemed to have a conflict of interest within the meaning of Financial Industry Regulatory Authority, Inc. (“FINRA”) Rule 5121. In such event, this offering would be conducted in compliance with FINRA Rule 5121 and such underwriter would not be permitted to make sales in this offering to any discretionary account without the prior written approval of the customer. Pursuant to that rule, the appointment of a “qualified independent underwriter” would not be required in connection with this offering, as the notes are “investment grade rated” (as defined in FINRA Rule 5121). See “Underwriting (Conflicts of Interest)—Other Relationships” and “Underwriting (Conflicts of Interest)—Conflicts of Interest.”

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DESCRIPTION OF THE NOTES

The notes will be a series of our senior debt securities issued under an indenture between Sempra, as issuer, and U.S. Bank Trust Company, National Association, as successor in interest to U.S. Bank National Association, as successor in interest to U.S. Bank Trust National Association, as trustee (the “trustee”), dated as of February 23, 2000 (the “indenture”). In this section and under the heading “Description of Debt Securities” in the accompanying prospectus, references to “Sempra,” “we,” “us,” “our” and similar terms mean, unless otherwise specified or the context otherwise requires, Sempra excluding its consolidated entities.

The indenture is the “senior indenture” referred to under “Description of Debt Securities” in the accompanying prospectus and the notes are a series of our senior debt securities referred to under such heading. The summary of selected provisions of the notes and the indenture appearing below supplements, and to the extent inconsistent, supersedes and replaces, the description of the general terms and provisions of the senior debt securities and the indenture contained in the accompanying prospectus. This summary is not complete and is qualified by reference to the provisions of the notes and the indenture. Forms of the notes and the indenture have been or will be filed with the SEC and you may obtain copies as described under “Where You Can Find More Information” in the accompanying prospectus.

General

The notes will constitute a separate series of our senior debt securities under the indenture and will be issued in the aggregate principal amount of $    . As described below under “—Other,” we may, from time to time, without notice to or consent of the holders of the notes, issue additional notes, and any such additional notes shall form a single series under the indenture with the notes offered by this prospectus supplement, provided that such additional notes shall be fungible with the notes previously issued for United States federal income tax purposes.

Interest Rate and Maturity

The notes will mature on January 7, 2028. The notes will not be redeemable at our option prior to maturity.

Interest on the notes will accrue from    , 2026 (the “Original Issue Date”) and will be payable quarterly in arrears on October 7, January 7, April 7 and July 7 of each year (each, an “Interest Payment Date”), beginning on October 7, 2026, to the holders of record of the notes at the close of business (i) on the business day immediately preceding such Interest Payment Date if the notes are in book-entry only form, or (ii) on the immediately preceding September 22, December 23, March 23, and June 22 (whether or not a business day), respectively, if the notes are not in book-entry only form.

The notes will bear interest at an annual rate equal to Compounded SOFR, determined as described below, plus    basis points (the “Margin”). Interest on the notes will accrue from and including the Original Issue Date to but excluding the first Interest Payment Date. Starting on the first Interest Payment Date, interest on the notes will accrue from and including the last Interest Payment Date on which we have paid, or duly provided for the payment of, interest on the notes to but excluding the next succeeding Interest Payment Date. No interest will accrue on the notes for the day that the notes mature.

The amount of interest payable for any period will be computed on the basis of a 360-day year and the actual number of days in the Observation Period (as defined below).

If any Interest Payment Date falls on a day that is not a business day, we will be required to make the interest payment on the next succeeding business day unless that business day is in the next succeeding calendar month, in which case (other than in the case of the maturity date) we will be required to make the interest payment on the immediately preceding business day. If an interest payment is made on the next succeeding

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business day, no interest will accrue as a result of the delay in payment. If the maturity date of the notes falls on a day that is not a business day, the payment due on such date will be postponed to the next succeeding business day, and no further interest will accrue in respect of such postponement. As used in this section, “business day,” when used with respect to any place of payment, means a day other than (i) a Saturday or a Sunday or (ii) a day on which banking institutions in that place of payment are authorized or obligated by law or executive order to remain closed.

As further described below, on each Interest Payment Determination Date relating to the applicable Interest Payment Date, the Calculation Agent (as defined below) will calculate the amount of accrued interest payable on the notes by multiplying (i) the outstanding principal amount of the notes by (ii) the product of (a) the interest rate for the relevant Interest Period multiplied by (b) the quotient of the actual number of calendar days in such Observation Period divided by 360. In no event will the interest rate on the notes be less than zero.

The term “Interest Period” means the period commencing on any Interest Payment Date (or, with respect to the initial Interest Period only, commencing on the Original Issue Date) to, but excluding, the next succeeding Interest Payment Date and, in the case of the last such period, the period from and including the Interest Payment Date immediately preceding the maturity date to, but excluding, the maturity date.

Compounded SOFR and the SOFR Index

SOFR is published by the Federal Reserve Bank of New York and is intended to be a broad measure of the cost of borrowing cash overnight collateralized by United States Treasury securities.

The SOFR Index is published by the Federal Reserve Bank of New York and measures the cumulative impact of compounding SOFR on a unit of investment over time, with the initial value set to 1.00000000 on April 2, 2018, the first value date of SOFR. The SOFR Index value reflects the effect of compounding SOFR each business day and allows the calculation of compounded SOFR averages over custom time periods.

The Federal Reserve Bank of New York notes on its publication page for the SOFR Index that use of the SOFR Index is subject to important limitations, indemnification obligations and disclaimers, including that the Federal Reserve Bank of New York may alter the methods of calculation, publication schedule, rate revision practices or availability of the SOFR Index at any time without notice. The interest rate for any Interest Period will not be adjusted for any modifications or amendments to the SOFR Index or SOFR data that the Federal Reserve Bank of New York may publish after the interest rate for that Interest Period has been determined.

Compounded SOFR

“Compounded SOFR” will be determined by the Calculation Agent in accordance with the following formula (and the resulting percentage will be rounded, if necessary, to the nearest one hundred-thousandth of a percentage point):

Compounded SOFR = ((SOFR IndexEnd / SOFR IndexStart)—1) × (360 / dc)

where:

“SOFR IndexStart” = For periods other than the initial Interest Period, the SOFR Index value on the preceding Interest Payment Determination Date, and, for the initial Interest Period, the SOFR Index value two United States Government Securities Business Days (as defined below) before the Original Issue Date;

“SOFR IndexEnd” = The SOFR Index value on the Interest Payment Determination Date relating to the applicable Interest Payment Date (or, in the final Interest Period, relating to the maturity date); and

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“dc” is the number of calendar days in the relevant Observation Period.

For purposes of determining Compounded SOFR:

“Interest Payment Determination Date” means the date that is two United States Government Securities Business Days before each Interest Payment Date.

“Observation Period” means, in respect of each Interest Period, the period from, and including, the date that is two United States Government Securities Business Days preceding the first date in such Interest Period to, but excluding, the date that is two United States Government Securities Business Days preceding the Interest Payment Date for such Interest Period (or in the final Interest Period, preceding the maturity date).

“SOFR Index” means, with respect to any United States Government Securities Business Day: (1) the SOFR Index value as published by the SOFR Administrator as such index appears on the SOFR Administrator’s Website at 3:00 p.m. (New York City time) on such United States Government Securities Business Day (the “SOFR Index Determination Time”); provided that: (2) if a SOFR Index value does not so appear as specified in clause (1) above at the SOFR Index Determination Time, then: (i) if a Benchmark Transition Event and its related Benchmark Replacement Date have not occurred with respect to SOFR, then Compounded SOFR shall be the rate determined pursuant to the “SOFR Index Unavailable Provisions” described below; or (ii) if a Benchmark Transition Event and its related Benchmark Replacement Date have occurred with respect to SOFR, then Compounded SOFR shall be the rate determined pursuant to the “Effect of Benchmark Transition Event” provisions described below.

“SOFR” means the daily secured overnight financing rate as provided by the SOFR Administrator on the SOFR Administrator’s Website.

“SOFR Administrator” means the Federal Reserve Bank of New York (or a successor administrator of SOFR).

“SOFR Administrator’s Website” means the website of the Federal Reserve Bank of New York, currently at http://www.newyorkfed.org, or any successor source.

“United States Government Securities Business Day” means any day except for a Saturday, a Sunday or a day on which the Securities Industry and Financial Markets Association recommends that the fixed income departments of its members be closed for the entire day for purposes of trading in United States government securities.

Notwithstanding anything to the contrary in the documentation relating to the notes, if we (or our Designee) determine on or prior to the relevant Reference Time (as defined below) that a Benchmark Transition Event and its related Benchmark Replacement Date have occurred with respect to determining Compounded SOFR, then the benchmark replacement provisions set forth below under “Effect of Benchmark Transition Event” will thereafter apply to all determinations of the rate of interest payable on the notes; provided, however, that the Calculation Agent shall use the interest rate in effect for the immediately prior interest period if we (or our Designee) have not notified the Calculation Agent of a Benchmark Replacement in accordance with the provisions of the indenture and the terms of notes within 30 days prior to the next Interest Payment Date.

For the avoidance of doubt, in accordance with the benchmark replacement provisions, after a Benchmark Transition Event and its related Benchmark Replacement Date have occurred, the interest rate for each Interest Period on the notes will be an annual rate equal to the sum of the Benchmark Replacement and the Margin.

SOFR Index Unavailable Provisions

If a SOFR IndexStart or SOFR IndexEnd is not published on the associated Interest Payment Determination Date and a Benchmark Transition Event and its related Benchmark Replacement Date have not occurred with

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respect to SOFR, then “Compounded SOFR” means, for the applicable Interest Period for which such index is not available, the rate of return on a daily compounded interest investment calculated in accordance with the formula for SOFR Averages, and definitions required for such formula, published on the SOFR Administrator’s Website, currently located at https://www.newyorkfed.org/markets/reference-rates/additional-information-about-reference-rates. For the purposes of this provision, references in the SOFR Averages compounding formula and related definitions to “calculation period” shall be replaced with “Observation Period” and the words “that is, 30-, 90-, or 180-calendar days” shall be removed. If SOFR does not so appear for any day, “i” in the Observation Period, SOFRi for such day “i” shall be SOFR published in respect of the first preceding United States Government Securities Business Day for which SOFR was published on the SOFR Administrator’s Website.

Effect of Benchmark Transition Event

Benchmark Replacement

If we (or our Designee) determine that a Benchmark Transition Event and its related Benchmark Replacement Date have occurred prior to the Reference Time in respect of any determination of the Benchmark on any date, the Benchmark Replacement will replace the then-current Benchmark for all purposes relating to the notes in respect of such determination on such date and all determinations on all subsequent dates.

Benchmark Replacement Conforming Changes

In connection with the implementation of a Benchmark Replacement, we (or our Designee) will have the right to make Benchmark Replacement Conforming Changes from time to time.

Decisions, Determinations and Elections

Any determination, decision or election that may be made by us (or our Designee) pursuant to this subsection “Effect of Benchmark Transition Event,” including any determination with respect to tenor, rate or adjustment or of the occurrence or non-occurrence of an event, circumstance or date and any decision to take or refrain from taking any action or any selection, will be conclusive and binding absent manifest error, will be made in our (or our Designee’s) sole discretion, and, notwithstanding anything to the contrary in any documentation relating to the notes, shall become effective without consent from the holders of the notes or any other party.

Certain Defined Terms

As used in this subsection “Effect of Benchmark Transition Event,” the following terms have the following meanings:

“Benchmark” means, initially, Compounded SOFR, as such term is defined above; provided that if a Benchmark Transition Event and its related Benchmark Replacement Date have occurred with respect to Compounded SOFR (or the published SOFR Index used in the calculation thereof) or the then-current Benchmark, then “Benchmark” means the applicable Benchmark Replacement.

“Benchmark Replacement” means the first alternative set forth in the order below that can be determined by us (or our Designee) as of the Benchmark Replacement Date: (1) the sum of: (a) the alternate rate of interest that has been selected or recommended by the Relevant Governmental Body as the replacement for the then-current Benchmark and (b) the Benchmark Replacement Adjustment; (2) the sum of: (a) the ISDA Fallback Rate (as defined below) and (b) the Benchmark Replacement Adjustment; and (3) the sum of: (a) the alternate rate of interest that has been selected by us (or our Designee) as the replacement for the then-current Benchmark giving due consideration to any industry-accepted rate of interest as a replacement for the then-current Benchmark for United States dollar denominated floating rate notes at such time and (b) the Benchmark Replacement Adjustment.

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“Benchmark Replacement Adjustment” means the first alternative set forth in the order below that can be determined by us (or our Designee) as of the Benchmark Replacement Date: (1) the spread adjustment, or method for calculating or determining such spread adjustment (which may be a positive or negative value or zero) that has been selected or recommended by the Relevant Governmental Body for the applicable Unadjusted Benchmark Replacement (as defined below); (2) if the applicable Unadjusted Benchmark Replacement is equivalent to the ISDA Fallback Rate, then the ISDA Fallback Adjustment; and (3) the spread adjustment (which may be a positive or negative value or zero) that has been selected by us (or our Designee) giving due consideration to any industry-accepted spread adjustment, or method for calculating or determining such spread adjustment, for the replacement of the then-current Benchmark with the applicable Unadjusted Benchmark Replacement for United States dollar denominated floating rate notes at such time. The Benchmark Replacement Adjustment shall not include the Margin specified in this prospectus supplement and such Margin shall be applied to the Benchmark Replacement to determine the interest payable on the notes.

“Benchmark Replacement Conforming Changes” means, with respect to any Benchmark Replacement, any technical, administrative or operational changes (including changes to the definition or interpretation of “Interest Period,” timing and frequency of determining rates and making payments of interest, rounding of amounts or tenor, and other administrative matters), or any other changes to any other terms or provisions of the notes, in each case that we (or our Designee) decides may be appropriate to reflect the adoption of such Benchmark Replacement in a manner substantially consistent with market practice (or, if we (or our Designee) decides that adoption of any portion of such market practice is not administratively feasible or if we (or our Designee) determines that no market practice for use of the Benchmark Replacement exists, in such other manner as we (or our Designee) determines is reasonably necessary or practicable).

“Benchmark Replacement Date” means the earliest to occur of the following events with respect to the then-current Benchmark: (1) in the case of clause (1) or (2) of the definition of “Benchmark Transition Event,” the later of (a) the date of the public statement or publication of information referenced therein and (b) the date on which the administrator of the Benchmark permanently or indefinitely ceases to provide the Benchmark; or (2) in the case of clause (3) of the definition of “Benchmark Transition Event,” the date of the public statement or publication of information referenced therein. For the avoidance of doubt, if the event giving rise to the Benchmark Replacement Date occurs on the same day as, but earlier than, the Reference Time in respect of any determination, the Benchmark Replacement Date will be deemed to have occurred prior to the Reference Time for such determination.

“Benchmark Transition Event” means the occurrence of one or more of the following events with respect to the then-current Benchmark (including the daily published component used in the calculation thereof): (1) a public statement or publication of information by or on behalf of the administrator of the Benchmark (or such component) announcing that such administrator has ceased or will cease to provide the Benchmark (or such component), permanently or indefinitely, provided that, at the time of such statement or publication, there is no successor administrator that will continue to provide the Benchmark (or such component); (2) a public statement or publication of information by the regulatory supervisor for the administrator of the Benchmark (or such component), the central bank for the currency of the Benchmark (or such component), an insolvency official with jurisdiction over the administrator for the Benchmark (or such component), a resolution authority with jurisdiction over the administrator for the Benchmark (or such component) or a court or an entity with similar insolvency or resolution authority over the administrator for the Benchmark (or such component), which states that the administrator of the Benchmark (or such component) has ceased or will cease to provide the Benchmark (or such component) permanently or indefinitely, provided that, at the time of such statement or publication, there is no successor administrator that will continue to provide the Benchmark (or such component); or (3) a public statement or publication of information by the regulatory supervisor for the administrator of the Benchmark announcing that the Benchmark is no longer representative.

“ISDA Definitions” means the 2021 ISDA Definitions published by the ISDA or any successor thereto, as amended or supplemented from time to time, or any successor definitional booklet for interest rate derivatives published from time to time.

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“ISDA Fallback Adjustment” means the spread adjustment (which may be a positive or negative value or zero) that would apply for derivatives transactions referencing the ISDA Definitions to be determined upon the occurrence of an index cessation event with respect to the Benchmark.

“ISDA Fallback Rate” means the rate that would apply for derivatives transactions referencing the ISDA Definitions to be effective upon the occurrence of an index cessation date with respect to the Benchmark for the applicable tenor excluding the applicable ISDA Fallback Adjustment.

“Reference Time” with respect to any determination of the Benchmark means (1) if the Benchmark is Compounded SOFR, the SOFR Index Determination Time, as such time is defined above, and (2) if the Benchmark is not Compounded SOFR, the time determined by us (or our Designee) in accordance with the Benchmark Replacement Conforming Changes.

“Relevant Governmental Body” means the Federal Reserve Board and/or the Federal Reserve Bank of New York, or a committee officially endorsed or convened by the Federal Reserve Board and/or the Federal Reserve Bank of New York or any successor thereto.

“Unadjusted Benchmark Replacement” means the Benchmark Replacement excluding the Benchmark Replacement Adjustment.

Calculation of the Floating Interest Rate

The “Calculation Agent” means a banking institution or trust company appointed by us to act as calculation agent, initially U.S. Bank Trust Company, National Association.

Absent wilful misconduct, bad faith or manifest error, the calculation of the applicable interest rate for each Interest Period by the Calculation Agent, or in certain circumstances described above, by us (or our Designee), will be final and binding on us, the trustee and the holders of the notes.

None of the trustee, paying agent, registrar or Calculation Agent shall be under any obligation (i) to monitor, determine or verify the unavailability or cessation of SOFR, the SOFR Index or any applicable Benchmark, or whether or when there has occurred, or to give notice to any other transaction party of the occurrence of, any Benchmark Transition Event or related Benchmark Replacement Date, (ii) to select, determine or designate any alternative method, Benchmark Replacement or alternative index, or other successor or replacement alternative index, or whether any conditions to the designation of such a rate or index have been satisfied, (iii) to select, determine or designate any Benchmark Replacement Adjustment, or other modifier to any replacement or successor index, or (iv) to determine whether or what Benchmark Replacement Conforming Changes with respect to such alternative method, Benchmark Replacement or alternative index are necessary or advisable, if any, in connection with any of the foregoing.

None of the trustee, paying agent, registrar or Calculation Agent shall be (i) liable for any inability, failure or delay on its part to perform any of its duties described in this prospectus supplement and the accompanying prospectus as a result of the unavailability of SOFR, the SOFR Index or other applicable Benchmark Replacement, including as a result of any failure, inability, delay, error or inaccuracy on the part of any other transaction party in providing any direction, instruction, notice or information contemplated by this prospectus supplement and the accompanying prospectus and reasonably required for the performance of such duties or (ii) required to succeed to, assume or otherwise perform any of our duties or our Designee’s duties in connection with the foregoing, or to appoint a successor or replacement in the event of its resignation or removal, or to remove and replace us or our Designee in the event of a default, breach or failure of performance on the part of us or our Designee with respect to the duties and obligations under the indenture and the notes.

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No Listing

The notes are a new issue of securities with no established trading market. We do not intend to apply for the listing or trading of the notes on any securities exchange or trading facility or for inclusion of the notes in any automated quotation system.

Ranking

The notes will be our unsecured and unsubordinated obligations and will rank equally in right of payment with all of our other existing and future unsecured and unsubordinated indebtedness and guarantees. The notes will rank senior in right of payment to all of our existing and future indebtedness that is subordinated to the notes. The notes will be effectively subordinated in right of payment to any secured indebtedness we have or may incur (to the extent of the value of the collateral securing such secured indebtedness). The notes are our obligations exclusively and are not the obligations of any of our consolidated entities, equity method investees or other affiliates. Because we are a holding company and substantially all the assets that produce our earnings are owned by our consolidated subsidiaries or our equity method investees, which are entities we do not control, the notes will be effectively subordinated in right of payment to all existing and future indebtedness and other liabilities and any preferred equity of our subsidiaries. At March 31, 2026, our consolidated subsidiaries had total indebtedness and other liabilities of approximately $53.6 billion owing to unaffiliated third parties. In addition, at March 31, 2026, our consolidated subsidiaries had approximately $1.9 billion of liabilities owed to us. The indenture does not limit the amount of secured indebtedness that may be incurred by us or the amount of other indebtedness or liabilities that may be incurred by us or any of our subsidiaries. For additional information, see “Risk Factors—The notes will be effectively subordinated in right of payment to all indebtedness and other liabilities and any preferred equity of Sempra’s subsidiaries, and the indenture under which the notes will be issued does not limit the aggregate amount of indebtedness and other liabilities that Sempra and its subsidiaries may incur” in this prospectus supplement and “Description of Debt Securities—Holding Company Structure” in the accompanying prospectus and “Risk Factors—Risks Related to Sempra—Operational and Structural Risks—Sempra’s ability to pay dividends and meet its obligations largely depends on the performance of its subsidiaries and entities accounted for as equity method investments” in our Annual Report on Form 10-K for the year ended December 31, 2025, incorporated by reference in this prospectus supplement and the accompanying prospectus.

Optional Redemption

The notes will not be redeemable at our option prior to maturity.

Events of Default

An “event of default” occurs with respect to the notes if:

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No event of default with respect to the notes will necessarily constitute an event of default with respect to the debt securities of any other series issued under the indenture, and no event of default with respect to any other series of debt securities issued under the indenture will necessarily constitute an event of default with respect to the notes.

The description set forth under this heading “—Events of Default” supersedes and replaces, insofar as it relates to the notes, the description set forth under the heading “Description of Debt Securities—Events of Default” (other than the last paragraph under such heading) in the accompanying prospectus. As of March 31, 2026, we had approximately $750 million aggregate principal amount of outstanding prior senior debt securities (as such term is defined in the last paragraph under the heading “Description of Debt Securities—Events of Default” in the accompanying prospectus).

Acceleration

If an event of default described under “—Events of Default” above occurs and is continuing with respect to the notes, then either the trustee or the registered holders of at least 33% in principal amount of the outstanding notes may declare the principal amount of all of the notes, together with accrued and unpaid interest thereon, to be due and payable immediately, and upon any such declaration the principal of and accrued and unpaid interest on the notes shall become immediately due and payable.

The description set forth under this heading “—Acceleration” supersedes and replaces, insofar as it relates to the notes, the description set forth under the heading “Description of Debt Securities—Remedies—Acceleration” in the accompanying prospectus.

Limitation on Proceedings

The following language supersedes and replaces, insofar as it relates to the notes, the fourth full paragraph (i.e., the paragraph beginning with the words “In addition, each indenture provides…”) under the heading “Description of Debt Securities—Remedies—Control by Registered Holders; Limitations” in the accompanying prospectus and shall apply to the notes instead of such paragraph: “In addition, the indenture provides that no registered holder of notes will have any right to institute any proceeding, judicial or otherwise, with respect to the indenture or for the appointment of a receiver or trustee or for any other remedy thereunder unless: (a) the registered holder has previously given the trustee written notice of a continuing event of default with respect to the notes; (b) the registered holders of at least 33% in principal amount of the outstanding notes have made written request to the trustee to institute proceedings in respect of that event of default and have offered the trustee reasonable indemnity against costs, expenses and liabilities incurred in complying with the request; and (c) for 60 days after receipt of the notice, the trustee has failed to institute a proceeding and no direction inconsistent with the request has been given to the trustee during such 60-day period by the registered holders of a majority in principal amount of the outstanding notes. Furthermore, no registered holder of notes will be entitled to institute any action if and to the extent that the action would disturb or prejudice the rights of other registered holders of the notes under the indenture.”

Other

The notes will not be subject to a sinking fund or entitled to any guarantees and you will not be permitted to require us to redeem or repurchase the notes at your option.

We will pay the principal of and premium, if any, on the notes at the maturity date for the notes or as otherwise required, upon presentation of the notes at the office of the trustee, as our paying agent. In our discretion, we may appoint one or more additional paying agents and security registrars for the notes and change or designate one or more additional places for payment and for registration of transfer of the notes, but we must at all times maintain a place of payment for the notes and a place for registration of transfer of the notes in the Borough of Manhattan, The City of New York.

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We may, from time to time, without notice to or the consent of the holders of notes, increase the principal amount of the notes offered hereby and issue such increased principal amount, or any portion thereof. Any additional notes so issued shall have the same form and terms (other than the offering price, the Original Issue Date and, under certain circumstances, the date from which interest thereon shall begin to accrue and the first Interest Payment Date), and shall carry the same right to receive accrued and unpaid interest, as the notes previously issued and such additional notes shall form a single series under the indenture with the notes offered by this prospectus supplement, provided that such additional notes shall be fungible with the notes previously issued for United States federal income tax purposes.

The notes initially will be issued in book-entry form and represented by one or more global notes deposited with, or on behalf of, The Depository Trust Company, as Depositary, and registered in the name of Cede & Co., its nominee. This means that you will not be entitled to receive a certificate for the notes that you purchase except in limited circumstances described in the accompanying prospectus under the heading “Global Securities.” The notes will be issued only in fully registered form without coupons, in denominations of $2,000 and integral multiples of $1,000 in excess thereof. We expect that payments due on notes in book-entry form will be paid by wire transfer of funds to the Depositary or its nominee. For additional information regarding notes in global form and the book-entry system, see “Global Securities” in the accompanying prospectus.

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MATERIAL UNITED STATES FEDERAL TAX CONSIDERATIONS

The following is a summary of certain material United States federal income tax considerations relating to the ownership and disposition of the notes, but does not purport to be a complete analysis of all the potential tax considerations relating thereto. This summary is based upon the provisions of the Internal Revenue Code of 1986, as amended (the “Code”), Treasury Regulations promulgated thereunder, administrative rulings and judicial decisions, each as of the date hereof. These authorities may be changed, perhaps retroactively, so as to result in United States federal income tax consequences different from those set forth below. We have not sought any ruling from the Internal Revenue Service (the “IRS”) or an opinion of counsel with respect to the statements made and the conclusions reached in the following summary, and there can be no assurance that the IRS or a court will agree with such statements and conclusions.

This summary is limited to holders who purchase the notes upon their initial issuance at their initial “issue price” within the meaning of Section 1273 of the Code (i.e., the first price at which a substantial amount of notes is sold to the public for cash, not including sales to bond houses, brokers or similar persons or organizations acting in the capacity of underwriters, placement agents or wholesalers) and who hold the notes as “capital assets” within the meaning of Section 1221 of the Code (generally, property held for investment).

This summary does not address United States federal tax laws other than income tax laws, and it does not address tax considerations arising under the laws of any foreign, state or local jurisdiction. In addition, this discussion does not address all tax considerations that may be applicable to a holder’s particular circumstances, including the impact of the Medicare contribution tax on net investment income or the alternative minimum tax, or to holders that may be subject to special tax rules, including, without limitation:

If an entity or arrangement treated as a partnership for United States federal income tax purposes holds notes, the tax treatment of a partner in the partnership generally will depend upon the status of the partner, the activities of the partnership, and certain determinations made at the partner level. Accordingly, partnerships holding our notes and the partners in such partnerships should consult their tax advisors regarding the tax consequences of the purchase, ownership and disposition of the notes.

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THIS SUMMARY OF CERTAIN MATERIAL UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS IS FOR GENERAL INFORMATION ONLY AND IS NOT TAX ADVICE. YOU ARE URGED TO CONSULT YOUR TAX ADVISOR WITH RESPECT TO THE APPLICATION OF UNITED STATES FEDERAL INCOME TAX LAWS TO YOUR PARTICULAR SITUATION AS WELL AS ANY TAX CONSEQUENCES OF THE OWNERSHIP AND DISPOSITION OF THE NOTES ARISING UNDER OTHER UNITED STATES FEDERAL TAX RULES OR UNDER THE LAWS OF ANY STATE, LOCAL, FOREIGN OR OTHER TAXING JURISDICTION OR UNDER ANY APPLICABLE TAX TREATY.

Consequences to U.S. Holders

The following is a summary of certain material United States federal income tax consequences that will apply to you if you are a U.S. holder (as defined below) of the notes. Certain consequences to non-U.S. holders (as defined below) of the notes are described under “—Consequences to Non-U.S. Holders” below. The term “U.S. holder” means a beneficial owner of a note that, for United States federal income tax purposes, is or is treated as:

Payments of Interest

You generally will be required to recognize any stated interest as ordinary income at the time it is paid or accrued on the notes in accordance with your regular method of accounting for United States federal income tax purposes.

Sale, Exchange, Redemption or Other Taxable Disposition of Notes

You generally will recognize capital gain or loss upon the sale, exchange, redemption or other taxable disposition of a note in an amount equal to the difference between (i) the sum of cash plus the fair market value of all other property received on such disposition (except to the extent such cash or property is attributable to accrued but unpaid interest not previously included in income, which generally will be taxable as ordinary income as discussed above in “—Consequences to U.S. Holders—Payments of Interest”) and (ii) your adjusted tax basis in the note. Your adjusted tax basis in a note generally will equal the amount you paid for the note. Under current law, if you are a non-corporate U.S. holder, including an individual, and have held the note for more than one year at the time of disposition, such capital gain generally will be taxable at a reduced rate. Your ability to deduct capital losses may be limited.

Backup Withholding and Information Reporting

Payments of interest and principal on notes held by U.S. holders and the proceeds received upon the sale, exchange, redemption or other disposition of the notes may be subject to information reporting and backup withholding. Payments to certain holders (including, among others, corporations and certain tax-exempt

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organizations) are generally not subject to information reporting or backup withholding. If you are a U.S. holder and you are not otherwise exempt, payments to you will be subject to backup withholding if:

You should consult your tax advisor regarding your qualification for an exemption from backup withholding and information reporting and the procedures for obtaining such an exemption, if applicable. Backup withholding is not an additional tax, and you may use amounts withheld under the backup withholding rules as a credit against your United States federal income tax liability or may claim a refund as long as you provide the required information to the IRS in a timely manner.

Consequences to Non-U.S. Holders

The following is a summary of certain material United States federal income tax consequences that will apply to you if you are a non-U.S. holder of notes. The term “non-U.S. holder” means a beneficial owner of a note that is not a partnership (or other entity or arrangement treated as a partnership for United States federal income tax purposes) or a U.S. holder.

Special rules may apply to certain non-U.S. holders such as “controlled foreign corporations,” “foreign controlled foreign corporations” and “passive foreign investment companies.” Such entities should consult their tax advisors to determine the United States federal, state, local and other tax consequences that may be relevant to them.

Payments of Interest

Subject to the discussion of backup withholding and information reporting and FATCA below, United States federal withholding tax will not apply to any payment to you of interest on a note provided that such interest is not effectively connected with your conduct of a United States trade or business and:

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If you cannot satisfy the requirements described above, you will be subject to a 30% United States federal withholding tax with respect to payments of interest on the notes, unless you provide us with a properly executed (1) IRS Form W-8BEN or IRS Form W-8BEN-E, as applicable (or substitute Form W-8BEN or Form W-8BEN-E, or the appropriate successor form for either form) claiming an exemption from or reduction in withholding under the benefit of an applicable United States income tax treaty or (2) IRS Form W-8ECI (or successor form) stating that the interest paid on the note is not subject to withholding tax because it is effectively connected with your conduct of a trade or business in the United States.

If you are engaged in a trade or business in the United States and interest on a note is effectively connected with your conduct of that trade or business (and, if required by an applicable income tax treaty, such interest is attributable to a permanent establishment maintained by you in the United States), you will be subject to United States federal income tax on that interest on a net income basis (although you will be exempt from the 30% withholding tax, provided the certification requirements described above are satisfied) in the same manner as if you were a United States person as defined under the Code. In addition, if you are a foreign corporation, you may be subject to a branch profits tax equal to 30% (or lower applicable treaty rate) of your earnings and profits for the taxable year, subject to adjustments, that are effectively connected with your conduct of a trade or business in the United States. For this purpose, interest will be included in the earnings and profits of such foreign corporation.

The certifications described above must be provided to the applicable withholding agent prior to the payment of interest and must be updated periodically. Non-U.S. holders that do not timely provide the applicable withholding agent with the required certification, but that qualify for a reduced rate under an applicable income tax treaty, may obtain a refund of any excess amounts withheld by timely filing an appropriate claim for refund with the IRS. Non-U.S. holders should consult their tax advisors regarding their entitlement to benefits under any applicable income tax treaty.

Sale, Exchange, Redemption or Other Taxable Disposition of Notes

Subject to the discussion of backup withholding and information reporting and FATCA below, any gain realized upon the sale, exchange, redemption or other taxable disposition of a note (other than any amount allocable to accrued and unpaid interest, which will be taxable as interest and may be subject to the rules discussed above in “—Consequences to Non-U.S. Holders—Payments of Interest”) generally will not be subject to United States federal income tax unless:

If your gain is effectively connected with your conduct of a United States trade or business (and, if required by an applicable income tax treaty, such gain is attributable to a permanent establishment maintained by you in the United States), you generally will be subject to United States federal income tax on the net gain derived from the sale, exchange, redemption or other disposition in the same manner as if you were a United States person (as defined under the Code). If you are a corporation, any such effectively connected gain received by you may also, under certain circumstances, be subject to the branch profits tax at a 30% rate (or such lower rate as may be

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prescribed under an applicable United States income tax treaty). If you are described in the second bullet point above, you will be subject to United States federal income tax on the gain derived from the sale, exchange, redemption or other disposition at a 30% rate (or such lower rate as may be prescribed under an applicable United States income tax treaty), which gain may be offset by United States source capital losses, even though you are not considered a resident of the United States, provided you have timely filed U.S. federal income tax returns with respect to such losses. Non-U.S. holders should consult their tax advisors regarding any applicable income tax treaties that may provide for different rules.

Backup Withholding and Information Reporting

Payments to a non-U.S. holder of interest on a note, and amounts withheld from such payments, if any, generally will be required to be reported to the IRS and the non-U.S. holder. Copies of the information returns reporting such interest payments and withholding may also be made available to the tax authorities of the country in which the non-U.S. holder resides or is established under the provisions of a specific treaty or agreement.

If you are a non-U.S. holder, you will generally not be subject to backup withholding and information reporting with respect to the proceeds of the sale of a note within the United States or conducted through certain United States-related financial intermediaries, if the payor receives the statement described above under “—Consequences to Non-U.S. Holders—Payments of Interest” and does not have actual knowledge or reason to know that you are a United States person, as defined under the Code, or you otherwise establish an exemption.

Proceeds of a disposition of a note paid outside the United States and conducted through a non-U.S. office of a non-U.S. broker generally will not be subject to backup withholding or information reporting.

Backup withholding is not an additional tax. You generally will be entitled to credit any amounts withheld under the backup withholding rules against your United States federal income tax liability provided that the required information is furnished to the IRS in a timely manner.

Foreign Account Tax Compliance Act

Pursuant to legislation commonly referred to as “FATCA” and regulations promulgated thereunder, payments to foreign entities of interest on, or (subject to the proposed U.S. Treasury Regulations discussed below) gross proceeds from the sale or other disposition of debt obligations of a U.S. issuer will be subject to a withholding tax (separate and apart from, but without duplication of, the withholding tax described above) at a rate of 30%, unless (1) a foreign financial institution that is a payee undertakes certain diligence and reporting obligations, (2) a non-financial foreign entity that is a payee either certifies it does not have any “substantial United States owners” (as defined in the Code) or furnishes identifying information regarding each substantial United States owner, or (3) a foreign financial institution or non-financial foreign entity that is a payee otherwise qualifies for an exemption from these rules. If the payee is a foreign financial institution and is subject to the diligence and reporting requirements in (1) above, it must enter into an agreement with the U.S. Department of the Treasury requiring, among other things, that it undertake to identify accounts held by certain “specified United States persons” or “United States owned foreign entities” (each as defined in the Code), annually report certain information about such accounts, and withhold 30% on certain payments to non-compliant foreign financial institutions and certain other account holders. Foreign financial institutions located in jurisdictions that have an intergovernmental agreement with the United States governing FATCA may be subject to different rules.

Under the applicable Treasury Regulations and administrative guidance, withholding under FATCA generally applies to payments of interest on a note. While withholding under FATCA would have applied also to payments of gross proceeds from the sale or other disposition of notes, proposed U.S. Treasury Regulations eliminate FATCA withholding on payments of gross proceeds entirely. Taxpayers generally may rely on these proposed U.S. Treasury Regulations until final U.S. Treasury Regulations are issued. You should consult your tax advisor regarding the possible effect of FATCA on your investment in the notes.

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UNDERWRITING (CONFLICTS OF INTEREST)

BMO Capital Markets Corp. and Academy Securities, Inc. are acting as representatives of the underwriters named below.

Subject to the terms and conditions stated in the underwriting agreement dated the date of this prospectus supplement, each underwriter named below has severally agreed to purchase, and we have agreed to sell to that underwriter, the principal amount of notes set forth below opposite the underwriter’s name.

The underwriting agreement provides that the obligations of the several underwriters to purchase the notes included in this offering are subject to approval of certain legal matters by counsel and to other conditions. The underwriters are obligated to purchase all of the notes if they purchase any of the notes. This offering of the notes by the underwriters is subject to receipt and acceptance and to the underwriters’ right to reject any order in whole or in part.

The underwriters propose to offer the notes directly to the public initially at the public offering price set forth on the cover page of this prospectus supplement. Notes sold by the underwriters to dealers may be sold at the public offering price less a concession not to exceed % of the principal amount of the notes. The underwriters may allow, and such dealers may reallow, a concession not to exceed % of the principal amount of the notes on sales to other dealers. After the initial offering of the notes to the public, the representatives may change the public offering price and concessions.

The notes are a new issue of securities with no established trading market and we do not intend to apply for the listing or trading of the notes on any securities exchange or trading facility or for inclusion of the notes in any automated quotation system. There can be no assurance that there will be a secondary market for the notes or the continued liquidity of such market if one develops. The underwriters have advised us that they intend to make a market in the notes, but they are not obligated to do so and may discontinue market making at any time without notice.

The following table shows the underwriting discount that we are to pay to the underwriters in connection with this offering (expressed as a percentage of the principal amount of the notes).

It is expected that delivery of the notes will be made against payment therefor on or about the date specified in the last paragraph of the cover page of this prospectus supplement, which will be the third business day following the date of the pricing of the notes. Under Rule 15c6-1 under the Securities Exchange Act of 1934, as amended, trades in the secondary market generally are required to settle in one business day, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes before the first business day prior to the closing of this offering will be required, by virtue of the fact that the normal settlement date for that trade would occur prior to the closing date for the issuance of the notes, to specify alternative settlement arrangements to prevent a failed settlement, and should consult their own advisers with respect to these matters.

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In connection with this offering, the representatives, on behalf of the underwriters, may purchase and sell notes in the open market. These transactions may include over-allotment, syndicate covering transactions and stabilizing transactions. Over-allotment involves syndicate sales of notes in excess of the principal amount of notes to be purchased from us by the underwriters in this offering, which creates a syndicate short position. Syndicate covering transactions involve purchases of the notes in the open market after the distribution has been completed in order to cover syndicate short positions. Stabilizing transactions consist of certain bids or purchases of notes made for the purpose of preventing or retarding a decline in the market prices of the notes while this offering is in progress.

The underwriters also may impose a penalty bid. Penalty bids permit the underwriters to reclaim a selling concession from a syndicate member when the representatives, in covering syndicate short positions or making stabilizing purchases, repurchase notes originally sold by that syndicate member.

Any of these activities may have the effect of preventing or retarding a decline in the market prices of the notes. They may also cause the market prices of the notes to be higher than the prices that otherwise would exist in the open market in the absence of these transactions. The underwriters may conduct these transactions in the over-the-counter market or otherwise. If the underwriters commence any of these transactions, they may discontinue them at any time without notice.

Neither we nor any of the underwriters makes any representation or prediction as to the direction or magnitude of any effect that any of the transactions described above, if commenced, may have on the market price of the notes. In addition, neither we nor any of the underwriters makes any representation that any of these transactions will be engaged in or that the transactions, if commenced, will not be discontinued without notice.

We estimate that our total expenses for this offering, excluding the underwriting discount, will be approximately $1.7 million. We have agreed to indemnify the several underwriters against certain liabilities, including liabilities under the Securities Act of 1933, as amended, or to contribute to payments the underwriters may be required to make because of any of those liabilities.

No Sales of Similar Securities

We have agreed that, without the prior written consent of the representatives, we will not, during the period beginning on and including the date of this prospectus supplement and ending on and including the later of (i) the termination of trading restrictions for the notes as notified to us by the representatives (but only if the representatives have notified us in writing on the Original Issue Date of the notes that such trading restrictions have not been terminated) and (ii) the Original Issue Date of the notes, offer, sell, contract to sell, grant any option for the sale of or otherwise dispose of any notes, any debt securities of Sempra which are substantially similar to the notes (“Similar Securities”) or any securities convertible into, exchangeable into or exercisable for any notes or Similar Securities, provided that this agreement shall not apply to the offer, issuance or sale of, or any contract to sell, (i) the notes to the underwriters pursuant to the underwriting agreement or (ii) commercial paper or other debt securities with scheduled maturities of less than one year. For purposes of clarity, it is understood and agreed that the term Similar Securities, as used in this paragraph, excludes commercial paper or other debt securities with scheduled maturities of less than one year.

Other Relationships

The underwriters and their respective affiliates are full-service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, investment research, principal investment, hedging, financing, trustee and brokerage activities. Some or all of the underwriters and/or their affiliates have in the past acted and/or are acting and/or may in the future act as lenders to, and/or have from time to time in the past performed and/or are performing and/or may in the future perform certain investment banking, advisory, general financing, trustee and commercial

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banking and other commercial transactions and services for, us and/or our affiliates for which they have received and in the future may receive customary fees and expenses. The underwriters and their affiliates may, from time to time, engage in other transactions with or perform other services for us and our affiliates in the ordinary course of their business for which they receive customary fees and expenses. In addition, affiliates of all of the underwriters are lenders under our credit facilities.

In addition, in the ordinary course of their business activities, the underwriters and their respective affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers, and such investment and securities activities may involve securities and/or instruments of ours or our affiliates. If any of the underwriters or their affiliates has a lending relationship with us, certain of those underwriters or their affiliates routinely hedge and certain other of those underwriters or their affiliates may hedge, their credit exposure to us, consistent with their customary risk management policies. Typically, these underwriters and their affiliates would hedge such exposure by entering into transactions which may consist of either the purchase of credit default swaps or the creation of short positions in our securities, including potentially the notes offered hereby. Any such credit default swaps or short positions could adversely affect trading prices of the notes offered hereby. The underwriters and their affiliates may also make investment recommendations and/or publish or express independent research views in respect of such securities or financial instruments and may hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments.

Conflicts of Interest

As described in this prospectus supplement under “Use of Proceeds,” we intend to use a substantial portion of the net proceeds from this offering to repay outstanding commercial paper and potentially other indebtedness and to use any remaining net proceeds for other general corporate purposes. None of the underwriters participating in this offering and/or their affiliates hold a position in our commercial paper but may hold positions in other indebtedness of ours, one of the underwriters acts as a dealer under our commercial paper program, and affiliates of one of the underwriters participating in this offering are lenders under our credit facilities. To the extent that net proceeds from this offering are applied to repay any of our outstanding indebtedness (including commercial paper, bank loans or other indebtedness) held by any of the underwriters or their affiliates, they will receive proceeds from this offering through the repayment of that indebtedness. If the amount of such proceeds so received by any underwriter or its affiliates is 5% or more of the net proceeds of this offering (not including the underwriting discount), such underwriter would be deemed to have a conflict of interest within the meaning of FINRA Rule 5121. In such event, this offering would be conducted in compliance with FINRA Rule 5121 and such underwriter would not be permitted to make sales in this offering to any discretionary account without the prior written approval of the customer. Pursuant to that rule, the appointment of a “qualified independent underwriter” would not be required in connection with this offering, as the notes are “investment grade rated” (as defined in FINRA Rule 5121).

Selling Restrictions

European Economic Area

Prohibition of Sales to EEA Retail Investors

The notes shall not be offered, sold or otherwise made available to any retail investor in the EEA. For the purposes of this provision:

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United Kingdom

Prohibition of Sales to United Kingdom Retail Investors

The notes shall not be offered, sold, distributed or otherwise made available to any retail investor in the United Kingdom. For the purposes of this provision:

Other Regulatory Restrictions in the United Kingdom

Any invitation or inducement to engage in investment activity (within the meaning of Section 21 of the FSMA) in connection with the issue or sale of the notes may only be communicated or caused to be communicated in circumstances in which Section 21(1) of the FSMA does not apply to Sempra.

All applicable provisions of the FSMA must be complied with in respect of anything done by any person in relation to the notes in, from or otherwise involving the United Kingdom.

Canada

The notes may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations. Any resale of the notes must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus supplement or the accompanying prospectus (including any amendment hereto or thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to Section 3A.3 of National Instrument 33-105 Underwriting Conflicts (NI 33-105), the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

Japan

The notes have not been and will not be registered under the Financial Instruments and Exchange Law of Japan (Law No. 25 of 1948, as amended) (the “Financial Instruments and Exchange Law”), and accordingly the

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notes have not been offered or sold and will not be offered or sold, directly or indirectly, in Japan or to, or for the account or benefit of, any resident of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan), or for the account or benefit of, others for re-offering or resale, directly or indirectly, in Japan or to, or for the account or benefit of any resident of Japan, except pursuant to an exemption from the registration requirements of, and otherwise in compliance with, the Financial Instruments and Exchange Law and any other applicable laws, regulations and guidelines promulgated by the relevant Japanese governmental and regulatory authorities and in effect at the relevant time.

Korea

The notes may not be offered, sold and delivered directly or indirectly, or offered or sold to any person for reoffering or resale, directly or indirectly, in Korea or to any resident of Korea except pursuant to the applicable laws and regulations of Korea, including the Korea Securities and Exchange Act and the Foreign Exchange Transaction Law (the “FIEA”) and the decrees and regulations thereunder. The notes have not been and will not be registered with the Financial Services Commission of Korea for public offering in Korea. Furthermore, the notes may not be resold to Korean residents unless the purchaser of the notes complies with all applicable regulatory requirements (including but not limited to government approval requirements under the FIEA and its subordinate decrees and regulations) in connection with the purchase of the notes.

Singapore

This prospectus supplement and the accompanying prospectus have not been and will not be registered as a prospectus under the Securities and Futures Act 2001 (the “SFA”) by the Monetary Authority of Singapore, and the offer of the notes in Singapore is made primarily pursuant to the exemptions under Sections 274 and 275 of the SFA. Accordingly, this prospectus supplement, the accompanying prospectus or any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the notes may not be circulated or distributed, nor may the notes be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to any person in Singapore other than (i) to an institutional investor as defined in Section 4A of the SFA (an “Institutional Investor”) pursuant to Section 274 of the SFA, (ii) to an accredited investor as defined in Section 4A of the SFA (an “Accredited Investor”) or other relevant person as defined in Section 275(2) of the SFA (a “Relevant Person”) and pursuant to Section 275(1) of the SFA, or to any person pursuant to an offer referred to in Section 275(1A) of the SFA, and in accordance with the conditions specified in Section 275 of the SFA and (where applicable) Regulation 3 of the Securities and Futures (Classes of Investors) Regulations 2018, or (iii) otherwise pursuant to, and in accordance with, the conditions of any other applicable exemption or provision of the SFA.

It is a condition of the offer that where the notes are subscribed for or acquired pursuant to an offer made in reliance on Section 275 of the SFA by a Relevant Person which is:

the securities or securities-based derivatives contracts (each as defined in Section 2(1) of the SFA) of that corporation, and the beneficiaries’ rights and interest (howsoever described) in that trust, shall not be transferred within six months after that corporation or that trust has subscribed for or acquired the notes except:

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Singapore’s Securities and Futures Act Product Classification—Solely for the purposes of its obligations pursuant to Sections 309B(1)(a) and 309B(1)(c) of the SFA, Sempra has determined, and hereby notifies all relevant persons (as defined in Section 309A of the SFA) that the notes are “prescribed capital markets products” (as defined in the Securities and Futures (Capital Markets Products) Regulations 2018) and “Excluded Investment Products” (as defined in MAS Notice SFA 04-N12: Notice on the Sale of Investment Products and MAS Notice FAA-N16: Notice on Recommendations on Investment Products).

Switzerland

This prospectus supplement and the accompanying prospectus are not intended to constitute an offer or solicitation to purchase or invest in the notes. The notes may not be publicly offered, directly or indirectly, in Switzerland within the meaning of the Swiss Financial Services Act (“FinSA”) and no application has or will be made to admit the notes to trading on any trading venue (exchange or multilateral trading facility) in Switzerland. Neither this prospectus supplement, the accompanying prospectus nor any other offering or marketing material relating to the notes constitutes a prospectus pursuant to the FinSA, and neither this prospectus supplement, the accompanying prospectus nor any other offering or marketing material relating to the notes may be publicly distributed or otherwise made publicly available in Switzerland.

United Arab Emirates

The notes have not been, and are not being, publicly offered, sold, promoted or advertised in the United Arab Emirates (including the Dubai International Financial Centre) other than in compliance with the laws of the United Arab Emirates (and the Dubai International Financial Centre) governing the issue, offering and sale of securities. Further, this prospectus supplement and the accompanying prospectus do not constitute a public offer of securities in the United Arab Emirates (including the Dubai International Financial Centre) and are not intended to be a public offer. This prospectus supplement and the accompanying prospectus have not been approved by or filed with the Central Bank of the United Arab Emirates, the Securities and Commodities Authority or the Dubai Financial Services Authority.

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LEGAL MATTERS

Latham & Watkins LLP will pass upon the validity of the notes and various other legal matters relating to the issuance and sale of the notes on behalf of Sempra. Sidley Austin LLP will act as counsel for the underwriters. Sidley Austin LLP from time to time represents Sempra and certain of its subsidiaries in connection with certain legal matters.

EXPERTS

The financial statements of Sempra incorporated by reference in this prospectus supplement and the accompanying prospectus and the effectiveness of Sempra’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports. Such financial statements are incorporated by reference in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

The financial statements of Oncor Electric Delivery Holdings Company LLC incorporated by reference in this prospectus supplement and the accompanying prospectus have been audited by Deloitte & Touche LLP, independent auditors, as stated in their report. Such financial statements are incorporated by reference in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

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PROSPECTUS

Common Stock

Preferred Stock

Debt Securities

Purchase Contracts

Units

Depositary Shares

Warrants

We may offer and sell our common stock, preferred stock, debt securities, purchase contracts, units, depositary shares and warrants from time to time in one or more offerings. This prospectus provides you with a general description of the securities we may offer.

Each time we offer and sell securities pursuant to this prospectus, we will provide a supplement to this prospectus that contains specific information about the offering and the amounts, prices and terms of the particular securities being offered at that time. The supplement may also add, update or change information contained in this prospectus with respect to that offering. You should carefully read this prospectus and the applicable prospectus supplement before you invest in any of our securities.

We may offer and sell the securities described in this prospectus and any prospectus supplement to or through one or more underwriters, dealers and agents, or directly to purchasers, or through a combination of these methods. If any underwriters, dealers or agents are involved in the offer and sale of any of the securities, their names and any applicable purchase price, fee, commission or discount arrangement between or among them will be set forth, or will be calculable from the information set forth, in the applicable prospectus supplement. See the information under the headings “About this Prospectus” and “Plan of Distribution” for more detail. No securities may be sold without delivery of this prospectus and the applicable prospectus supplement describing the method and terms of the offering of such securities.

Our common stock is listed on the New York Stock Exchange under the trading symbol “SRE.” On May 14, 2026, the last reported sale price of our common stock on the New York Stock Exchange was $92.86 per share. Our 5.75% Junior Subordinated Notes Due 2079, which we refer to as the “junior subordinated notes” in this prospectus, are listed on the New York Stock Exchange under the trading symbol “SREA.” On May 14, 2026, the last reported sale price of the junior subordinated notes on the New York Stock Exchange was $21.55 per note.

Investing in our securities involves risks. See the “Risk Factors” on page 7 of this prospectus, and the information under any similar heading in the applicable prospectus supplement.

Neither the U.S. Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is May 15, 2026.

TABLE OF CONTENTS

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ABOUT THIS PROSPECTUS

This prospectus is part of an “automatic shelf” registration statement that we filed with the U.S. Securities and Exchange Commission, or the “SEC,” as a “well-known seasoned issuer” as defined in Rule 405 under the Securities Act of 1933, as amended. By using a shelf registration statement, we may sell the securities described in this prospectus from time to time and in one or more offerings. This prospectus only provides you with a general description of the securities we may offer. Each time that we offer and sell securities, we will provide a prospectus supplement to this prospectus that contains specific information about the securities being offered and sold and the specific terms of that offering. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to that offering. The prospectus supplement or free writing prospectus may also add, update or change information contained in this prospectus with respect to that offering. If there is any inconsistency between the information in this prospectus and the applicable prospectus supplement or free writing prospectus, you should rely on the prospectus supplement or free writing prospectus, as applicable. Before purchasing any securities, you should carefully read both this prospectus and the applicable prospectus supplement (and any applicable free writing prospectus), together with the additional information under the heading “Where You Can Find More Information.”

We have not authorized anyone to provide you with any information or to make any representations other than those contained in this prospectus, any applicable prospectus supplement or any free writing prospectuses prepared by or on behalf of us or to which we have referred you. We take no responsibility for, and provide no assurance as to the reliability of, any other information that others may give you. We will not make an offer to sell securities in any jurisdiction where the offer or sale is not permitted. You should assume that the information contained in this prospectus and any applicable prospectus supplement to this prospectus is accurate only as of the date on its respective cover, that the information contained in any applicable free writing prospectus is accurate only as of the date of that free writing prospectus, and that any information contained in documents incorporated by reference is accurate only as of the dates of those respective documents, unless we indicate otherwise. Our business, financial condition, results of operations and prospects may have changed since those dates.

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FORWARD-LOOKING STATEMENTS AND MARKET DATA

This prospectus and the documents incorporated by reference herein contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are based on assumptions about the future, involve risks and uncertainties, and are not guarantees. Future results may differ materially from those expressed or implied in any forward-looking statement. These forward-looking statements represent our estimates and assumptions only as of the respective dates of the documents in which such forward-looking statements appear. We assume no obligation to update or revise any forward-looking statement as a result of new information, future events or otherwise.

Forward-looking statements can be identified by words such as “believe,” “expect,” “intend,” “anticipate,” “contemplate,” “plan,” “estimate,” “project,” “forecast,” “envision,” “should,” “could,” “would,” “will,” “confident,” “may,” “can,” “potential,” “possible,” “proposed,” “in process,” “construct,” “develop,” “opportunity,” “preliminary,” “pro forma,” “strategic,” “initiative,” “target,” “outlook,” “optimistic,” “poised,” “positioned,” “maintain,” “continue,” “progress,” “advance,” “goal,” “aim,” “commit,” or similar expressions, or when we discuss our guidance, priorities, strategies, goals, vision, mission, projections, intentions or expectations.

Factors, among others, that could cause actual results and events to differ materially from those expressed or implied in any forward-looking statement include:

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We caution you not to rely unduly on any forward-looking statements. You should review and consider carefully the risks, uncertainties and other factors that affect our businesses as described herein, in our most recent Annual Report on Form 10-K and in other reports and documents we file with the SEC that are incorporated by reference in this prospectus, any prospectus supplement, and any related free writing prospectus issued by us. You may obtain copies of these reports and documents as described under “Where You Can Find More Information” in this prospectus.

This prospectus incorporates by reference, and any prospectus supplement or free writing prospectus may contain or incorporate by reference, market, demographic and industry data and forecasts that are based on or derived from independent industry publications, publicly available information, government data and other information from third parties or that have been compiled or prepared by our management or employees. We do not guarantee the accuracy or completeness of any of this information, and we have not independently verified any of the information provided by third-party sources. In addition, market, demographic and industry data and forecasts that may be contained or incorporated by reference in this prospectus, any prospectus supplement or any free writing prospectus may involve estimates, assumptions and other uncertainties and are subject to change based on various factors, including those discussed under this heading “Forward-Looking Statements and Market Data,” under the heading “Risk Factors,” and under similar headings in this prospectus, the applicable prospectus supplement, any related free writing prospectus, and documents that are incorporated or deemed to be incorporated by reference in this prospectus and the applicable prospectus supplement. Accordingly, you should not place undue reliance on any of this information.

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WHERE YOU CAN FIND MORE INFORMATION

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains an Internet site that contains reports, proxy and information statements and other information about issuers, such as us, who file electronically with the SEC. The address of that site is http://www.sec.gov.

This prospectus and any prospectus supplement are part of a registration statement that we filed with the SEC and do not contain all of the information in the registration statement. The full registration statement may be obtained from the SEC or from us, as indicated below. Forms of the indentures and other documents establishing the terms of the securities we may offer are or will be filed as exhibits to the registration statement or documents incorporated by reference in the registration statement. Statements in this prospectus or any prospectus supplement about these documents are not complete and each statement is qualified in all respects by reference to the document to which it refers. You should refer to the actual documents for a more complete description of the relevant matters. You may inspect a copy of the registration statement through the SEC’s Internet site, as provided above.

Incorporation by Reference

The rules of the SEC allow us to “incorporate by reference” information into this prospectus, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The information incorporated by reference is deemed to be part of this prospectus, and subsequent information that we file with the SEC that is also incorporated or deemed to be incorporated by reference in this prospectus will automatically update and, to the extent inconsistent, supersede the prior information. Any statement contained in this prospectus or a previously filed document incorporated by reference herein shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained in this prospectus, any applicable prospectus supplement or any subsequently filed document that is incorporated or deemed to be incorporated by reference in this prospectus modifies or replaces that statement.

We incorporate by reference our documents listed below and all documents that we file with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended, which we refer to as the “Exchange Act” in this prospectus, after the date of this prospectus through the termination of the offering of the securities described in this prospectus. Notwithstanding anything herein to the contrary, we are not, however, incorporating by reference any documents or portions thereof or exhibits thereto, whether specifically listed below or filed in the future, that are not deemed “filed” with the SEC, including, without limitation, our Compensation and Talent Development Committee report, Audit Committee report and performance graph required under SEC Regulation S-K Item 201(e) and any information furnished pursuant to Items 2.02 or 7.01 of Form 8-K or related exhibits furnished pursuant to Item 9.01 of Form 8-K.

This prospectus and any applicable prospectus supplement incorporate by reference the documents set forth below that have previously been filed with the SEC:

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We will provide, upon written or oral request and without charge, to each person, including any beneficial owner, to whom a copy of this prospectus has been delivered a copy of any of the documents incorporated by reference in this prospectus. You may submit such a request by writing or calling us at the following address or telephone number:

Sempra

488 8th Avenue

San Diego, California 92101

Attention: Corporate Secretary

Telephone: (619) 696-2000

Exhibits to the filings will not be sent, however, unless those exhibits have specifically been incorporated by reference in this prospectus or any applicable prospectus supplement.

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SEMPRA

Sempra is a holding company whose principal businesses are regulated utilities in California and Texas. Our businesses invest in and operate electric and gas utilities and other energy infrastructure that provide energy services to customers. For additional information concerning us, you should refer to the information under the heading “Where You Can Find More Information” in this prospectus.

Our principal executive offices are located at 488 8th Avenue, San Diego, California 92101, and our telephone number is (619) 696-2000. Our website is http://www.sempra.com.

Except for documents that are incorporated by reference in this prospectus as described under the heading “Where You Can Find More Information” and that are available on the SEC website at www.sec.gov, the information contained on, or that can be accessed through, our website or any other website referenced herein is not a part of or incorporated by reference in this prospectus or any document incorporated or deemed to be incorporated herein.

In this prospectus, references to “Sempra,” “we,” “us,” “our” and similar terms mean, unless otherwise specified or the context otherwise requires, Sempra together with its consolidated entities; and references to “you” mean the potential purchasers of the applicable securities offered hereby.

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RISK FACTORS

Investment in any securities offered pursuant to this prospectus and the applicable prospectus supplement involves risks. Before deciding whether to invest in any offered securities, you should carefully consider the risk factors and other cautionary language incorporated in this prospectus and the applicable prospectus supplement by reference to our most recent Annual Report on Form 10-K and any Quarterly Reports on Form 10-Q and Current Reports on Form 8-K filed (and not furnished) by us with the SEC subsequent to the last day of the fiscal year covered by our most recent Annual Report on Form 10-K and all other information contained or incorporated by reference in this prospectus, as updated by our subsequent filings under the Exchange Act that are also incorporated by reference in this prospectus, and the risk factors and other information contained and incorporated by reference in the applicable prospectus supplement and any applicable free writing prospectus. Please also carefully read the information under the heading “Forward-Looking Statements and Market Data” and any similar headings in this prospectus, our most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q and Current Reports on Form 8-K. There may be other risks and uncertainties not known to us or that we deem immaterial that also could impair our business operations, financial results and the value of any securities offered pursuant to this prospectus. The occurrence of any of these risks could have a material adverse effect on our results of operations, financial condition, cash flows and/or prospects and might cause you to lose all or part of your investment in the offered securities.

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USE OF PROCEEDS

We intend to use the net proceeds from the sale of the securities as set forth in the applicable prospectus supplement.

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DESCRIPTION OF CAPITAL STOCK

The following is a general description of some of the terms and provisions of the common stock and preferred stock Sempra may offer and sell under this prospectus. Under this heading “Description of Capital Stock,” references to “Sempra,” “we,” “us,” “our” and similar terms mean, unless otherwise specified or the context otherwise requires, Sempra excluding its consolidated entities.

Our common stock is, and any preferred stock we may issue in the future will be, governed by our restated articles of incorporation and bylaws and applicable California law. Our restated articles of incorporation give us broad authority to set the particular terms of each series of preferred stock. The particular terms of a series of preferred stock will be described in the applicable prospectus supplement, or a free writing prospectus, relating to such series of preferred stock.

Our restated articles of incorporation and bylaws contain the full legal text of the matters described under this heading “Description of Capital Stock.” The following description of certain provisions of our restated articles of incorporation and bylaws is not complete and is qualified in its entirety by reference to all the provisions of our restated articles of incorporation, including the certificate of determination of preferences for any series of preferred stock that may be issued and outstanding in the future, and bylaws, copies of which have been or will be filed or incorporated by reference as exhibits to the registration statement of which this prospectus is a part or to a document incorporated by reference in this prospectus and which may be obtained as described under “Where You Can Find More Information.” Whenever we refer to particular sections or defined terms of our restated articles of incorporation, including any applicable certificate of determination of preferences, or bylaws in this prospectus or a prospectus supplement or free writing prospectus, those sections or defined terms are incorporated by reference in this prospectus or the applicable prospectus supplement or free writing prospectus. This description also is subject to and qualified by reference to the description of the particular terms of a particular series of preferred stock described in the applicable prospectus supplement or free writing prospectus related to any offering of such series of preferred stock.

General

We are currently authorized to issue (i) 1,125,000,000 shares of common stock, without par value, and (ii) 50,000,000 shares of preferred stock. As of May 14, 2026, there were 653,707,401 outstanding shares of our common stock and no outstanding shares of our preferred stock. No other classes of capital stock are authorized under our restated articles of incorporation.

We may in the future amend our restated articles of incorporation to increase the authorized number of shares of our authorized common stock or preferred stock or to authorize shares of one or more additional classes of stock. Any such amendment would require approval by our board of directors and approval by our shareholders.

Common Stock

The holders of our common stock are entitled to receive, ratably, such dividends as our board of directors may from time to time declare, subject to any rights of holders of outstanding shares of any series of our preferred stock to receive dividends before dividends may be paid on our common stock.

In the event of any liquidation, dissolution or winding up of Sempra, whether voluntary or involuntary, the holders of shares of our common stock are entitled, subject to any rights of the holders of outstanding shares of any series of our preferred stock to receive distributions in such event before any distributions are made to holders of our common stock, to receive, ratably, any of our remaining assets after the discharge of our liabilities.

Except as otherwise provided by law, each holder of our common stock is entitled to one vote per share on each matter submitted to a vote of our shareholders, subject to the voting rights, if any, of holders of outstanding

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shares of any series of our preferred stock, which could include the right to vote separately as a class or series, or the right to vote together with the common stock as a single class.

At each annual meeting of our shareholders, each director will be elected to hold office until the next annual meeting of shareholders and until a successor has been elected and qualified or until such director’s earlier resignation or removal. Pursuant to our bylaws, directors standing for election in an uncontested election (as defined below) will be elected by the affirmative vote of a majority of the shares entitled to vote for them represented and voting at a duly held meeting at which a quorum is present (and such affirmative votes must also represent more than 25% of the outstanding shares entitled to vote in the election of such directors). In any election of directors that is not an uncontested election, the candidates receiving the highest number of affirmative votes of the shares entitled to vote for them, up to the number of directors to be elected by those shares, will be elected and votes against a director and votes withheld will have no effect. The rights of holders of our common stock to elect directors are subject to the voting rights, if any, of holders of outstanding shares of any series of our preferred stock, which could include: (i) voting as a separate class or series, the right to elect one or more directors, or (ii) voting together with our common stock as a single class, the right to vote in the election of directors generally. Our bylaws define an “uncontested election” as, in general, an election of directors in which the number of candidates for election does not exceed the number of directors to be elected by our shareholders at that election, determined at the times specified in our bylaws. Our restated articles of incorporation provide that none of our shareholders may cumulate votes in the election of directors.

Our common stock does not contain any conversion rights or sinking fund or redemption provisions. Holders of our common stock are not entitled to preemptive rights to subscribe for or purchase any part of any new or additional issue of stock or securities convertible into stock.

Our board of directors is expressly authorized to make, amend or repeal our bylaws, without any action on the part of the shareholders, except as otherwise required by applicable California law, solely by the affirmative vote of at least two-thirds of the authorized number of directors. Our bylaws may also be amended or repealed by our shareholders, by the approval of the outstanding shares (as defined in Section 152 of the Corporations Code of the State of California) of Sempra.

Preferred Stock

The preferred stock is issuable in series. Subject to the maximum number of shares of preferred stock authorized by our restated articles of incorporation, our board of directors is authorized, without the need for a vote or other action of our shareholders, to cause the issuance of shares of our preferred stock from time to time in one or more series, to determine the number of shares and designation of the preferred stock of any series, to increase or decrease (but not below the number of shares of such series then outstanding) the number of shares of any such series subsequent to the issuance of shares of that series, and to determine or alter the rights, preferences, privileges and restrictions granted to or imposed upon any wholly unissued series of preferred stock, which may include, among other things, dividend and liquidation rights and preferences, including with respect to relative ranking; rights to convert such shares into common stock; any rights and terms of redemption, including sinking fund provisions; any voting rights; and any other specific terms, preferences, rights, limitations or restrictions; in each case in accordance with our restated articles of incorporation. Accordingly, our board of directors could cause the issuance of one or more series of our preferred stock ranking senior to our common stock with respect to dividends or distributions in the event of our liquidation, dissolution or winding up or with voting or other rights that could dilute or otherwise adversely affect the voting or other rights and economic interests of holders of our common stock. Likewise, our board of directors could cause the issuance of one or more series of our preferred stock ranking on parity with or senior to one or more other series of our preferred stock (subject to the terms of any one or more other series of our preferred stock, if any, then outstanding) with respect to dividends or distributions in the event of our liquidation, dissolution or winding up or with voting or other rights that could dilute or otherwise adversely affect any voting rights or the other rights and economic interests of the holders of any such other series of preferred stock.

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In the event that we issue any series of preferred stock pursuant to this prospectus, we will describe the terms of such series of preferred stock in a prospectus supplement to this prospectus and, if applicable, a free writing prospectus.

Anti-Takeover Effects of our Restated Articles of Incorporation and Bylaws

Certain provisions of our restated articles of incorporation and bylaws could have the effect of delaying, deterring or preventing another party from acquiring or seeking to acquire control of us. These provisions are intended to discourage certain types of coercive takeover practices and inadequate takeover bids and to encourage anyone seeking to acquire control of us to negotiate first with our board of directors. However, these provisions could also delay, deter or prevent a change of control or other takeover of our company that our shareholders might consider to be in their best interests, including transactions that might result in a premium being paid over the market prices of our common stock and any outstanding preferred stock, and may also limit the prices that investors are willing to pay in the future for our common stock and any outstanding preferred stock. These provisions may also have the effect of preventing changes in our management. Certain provisions of our restated articles of incorporation and bylaws include anti-takeover provisions that:

Limitation on Liability of Directors; Indemnification of Directors and Officers

Our restated articles of incorporation provide that the liability of our directors for monetary damages shall be eliminated to the fullest extent permissible under California law. Section 317 of the Corporations Code of the State of California permits a corporation to provide indemnification to its directors, officers and agents under certain circumstances. Our bylaws provide for mandatory indemnification of our directors and officers, subject to the limitations set forth therein. In addition, our restated articles of incorporation provide us with the power, by bylaw, agreement or otherwise, to provide indemnification of our directors, officers and other agents to the fullest extent permissible under California law and, subject to certain limitations, in excess of the indemnification expressly permitted under Section 317 of the Corporations Code of the State of California. We believe that this limitation of liability and these indemnification provisions are useful to attract and retain qualified directors and officers.

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Listing of our Common Stock

Our common stock is listed on the New York Stock Exchange under the trading symbol “SRE”.

Registrar and Transfer Agent

The registrar and transfer agent for our common stock is Computershare Trust Company, N.A..

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DESCRIPTION OF DEBT SECURITIES

The following is a general description of some of the terms and provisions of the debt securities we may offer and sell under this prospectus. To the extent the terms and provisions of any series of debt securities modify the general terms and provisions described below, such modifications will be described in a prospectus supplement or free writing prospectus relating to such series. The debt securities may be issued as senior debt securities or subordinated debt securities (which may include junior subordinated debt securities, senior subordinated debt securities and subordinated debt securities of any other relative ranking). Under this heading “Description of Debt Securities,” references to “senior indenture” mean the indenture dated as of February 23, 2000 between us and U.S. Bank Trust Company, National Association, as successor trustee; references to “subordinated indenture” mean the subordinated indenture dated as of June 26, 2019 between us and U.S. Bank Trust Company, National Association, as successor trustee; references to “indentures” or “indenture” mean the senior indenture and/or the subordinated indenture; and references to “Sempra,” “we,” “us,” “our” and similar terms mean, unless otherwise specified or the context otherwise requires, Sempra excluding its consolidated entities.

The senior debt securities will be governed by the senior indenture and the subordinated debt securities will be governed by the subordinated indenture. Each indenture gives us broad authority to set the particular terms of each series of debt securities, including the right to modify certain of the terms contained in the indenture. The particular terms of a series of debt securities and the extent, if any, to which the particular terms of the series modify the terms of the applicable indenture will be described in the applicable prospectus supplement, or a free writing prospectus, relating to such series of debt securities.

Each indenture contains the full legal text of the matters described under this heading “Description of Debt Securities.” The following description of certain provisions of the indentures and our debt securities is not complete and is subject to and qualified in its entirety by reference to all the provisions of the applicable indenture, including definitions of terms used in such indenture, and the certificates evidencing the debt securities of each series, copies of which have been or will be filed or incorporated by reference as exhibits to the registration statement of which this prospectus is a part or to a document incorporated by reference in this prospectus and which may be obtained as described under the heading “Where You Can Find More Information.” We also include references in parentheses to particular sections of the applicable indenture. Whenever we refer to particular sections or defined terms of the indentures in this prospectus or a prospectus supplement or free writing prospectus, those sections or defined terms are incorporated by reference in this prospectus or the applicable prospectus supplement or free writing prospectus. This description also is subject to and qualified by reference to the description of the particular terms of a particular series of debt securities described in the applicable prospectus supplement or free writing prospectus related to any offering of such series of debt securities.

General

We may issue an unlimited amount of debt securities under the indentures in one or more series. We are not required to issue all debt securities of one series at the same time and, unless otherwise provided for a particular series of debt securities in the applicable prospectus supplement or a free writing prospectus, We may, without notice to or consent of the holders of the debt securities of any series, increase the aggregate principal amount of the debt securities of any series and issue additional debt securities of such series up to the maximum aggregate principal amount authorized with respect to such series as increased from time to time. Any additional debt securities so issued shall have the same form and terms (other than offering price, the date of issuance and, under certain circumstances, the date from which interest thereon shall begin to accrue and the first interest payment date) and shall carry the same right to receive accrued and unpaid interest as the debt securities previously issued, and such additional debt securities shall form a single series with the debt securities previously issued under the applicable indenture, provided that such additional debt securities of such series shall be fungible with the debt securities of such series previously issued for United States federal income tax purposes.

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Unless otherwise provided in a prospectus supplement or free writing prospectus, our debt securities will not be subject to a sinking fund or entitled to any guarantees and you will not be permitted to require us to redeem or repurchase the debt securities at your option.

Unless otherwise provided in a prospectus supplement or free writing prospectus, the applicable trustee shall serve as the initial paying agent and security registrar for our debt securities.

The debt securities will be our unsecured obligations.

Prior to the issuance of each series of debt securities, the terms of the particular series of debt securities will be specified in either a supplemental indenture or a board resolution and one or more officers’ certificates. We refer you to the applicable prospectus supplement or free writing prospectus for a description of the following terms of each series of debt securities:

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(See Section 301.)

Ranking

The senior debt securities will be our unsecured and unsubordinated obligations. The indebtedness represented by the senior debt securities will rank equally in right of payment with all of our other unsecured and unsubordinated indebtedness. The indebtedness represented by the subordinated debt securities will rank junior and subordinate in right of payment to the prior payment in full of our existing and future Senior Indebtedness (as defined with respect to each series of subordinated debt securities), to the extent and in the manner set forth below under “—Subordination” or as may be set forth in the applicable prospectus supplement or free writing prospectus. In addition, the subordinated debt securities will be effectively subordinated in right of payment to any secured indebtedness we may have or may incur (to the extent of the value of the collateral securing such secured indebtedness). The term “Senior Indebtedness,” when used with respect to the subordinated debt securities of any series, has the meaning set forth below under “—Subordination” unless a different definition shall be set forth in the applicable prospectus supplement or a free writing prospectus relating to the subordinated debt securities of such series. The debt securities are the obligations of Sempra exclusively, and are not the obligations of any of our consolidated entities, equity method investees or other affiliates. Because we are a holding company and substantially all the assets that produce our earnings are owned by our consolidated subsidiaries or our equity method investees, which are entities we do not control, the debt securities will be effectively subordinated to all existing and future indebtedness and other liabilities and any preferred equity of our subsidiaries. In addition, to secure the trustee’s right to compensation, reimbursement and indemnity, the senior indenture and the subordinated indenture each create a first priority lien prior to the debt securities on all property and funds held by the trustee other than funds held in trust for the benefit of debt security holders.

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Holding Company Structure

We are a holding company and substantially all the assets that produce our earnings are owned by our consolidated subsidiaries or our equity method investees, which are entities we do not control. Our ability to meet our obligations under our debt securities largely depends on distributions from our subsidiaries and equity method investees, which in turn depend on their ability to execute their business strategies and generate cash flows in excess of their own expenditures, dividend payments to third-party owners (if any) and debt and other obligations. Our subsidiaries and equity method investees are all separate and distinct legal entities that are not obligated to pay dividends or make loans or distributions to us and could be precluded from doing so by legislation, regulation or contractual restrictions, in times of financial distress or in other circumstances, and they have no obligation to pay any amounts due on our debt securities or to make any funds available for payment of amounts due on our debt securities.

Because we are a holding company, our obligations under the debt securities will be structurally subordinated to all existing and future indebtedness and other liabilities and any preferred equity of our subsidiaries. Therefore, our rights and the rights of our creditors, including the rights of the holders of our debt securities, to participate in the assets of any subsidiary upon the liquidation or reorganization of the subsidiary will be subject to the prior claims of the subsidiary’s creditors. To the extent that we may ourselves be a creditor with recognized claims against any of our subsidiaries, our claims would still be effectively subordinated to any security interest in, or mortgages or other liens on, the assets of the subsidiary and would be subordinated to any indebtedness or other liabilities of the subsidiary that are senior to our claims. We expect to incur, and expect that our subsidiaries will incur, substantial additional amounts of indebtedness.

Payment of Debt Securities

We will pay interest on the debt securities on each interest payment date to the person in whose name the debt securities are registered as of the close of business on the regular record date relating to the interest payment date.

However, if we default in paying interest on a debt security, we will pay defaulted interest, at our election, in either of the two following ways:

(See Section 307.)

We will pay principal of and any premium on the debt securities at stated maturity, upon redemption or as otherwise required, upon presentation of the debt securities at the office of the paying agent, which initially will be the trustee or such other paying agent designated in accordance with the applicable indenture. Any other paying agent initially designated for the debt securities of a particular series will be named in the applicable prospectus supplement or free writing prospectus. In our discretion, we may remove and/or appoint one or more additional paying agents and change or designate one or more additional places for payment. A place for

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payment of the debt securities will be provided in the Borough of Manhattan, The City of New York, New York. (See Section 1002.)

If any interest payment date, redemption date or the maturity date of the debt securities is not a business day at any place of payment, then payment of the principal and premium, if any, or interest, as applicable, may be made on the next business day at that place of payment. In that case, no interest will accrue on the amount payable for the period from and after the applicable interest payment date, redemption date or maturity date, as the case may be (See Section 113.)

Form; Transfers; Exchanges

The debt securities initially will be issued in book-entry form and represented by one or more global securities deposited with, or on behalf of, The Depository Trust Company, New York, New York, as depositary, which we refer to as “DTC” or the “depositary” in this prospectus, and registered in the name of Cede & Co., its nominee. This means that you will not be entitled to receive a certificate for the debt securities that you purchase except under the limited circumstances described below under the heading “Global Securities.” If any of the debt securities are issued in certificated form, they will be issued only in fully registered form without coupons, in denominations of, with respect to senior debt securities, $1,000 or integral multiples thereof or, in the case of subordinated debt securities, $2,000 or integral multiples of $1,000 in excess thereof. (See Section 302.)

You will receive payments and may transfer debt securities in book-entry form only through the facilities of DTC and its direct and indirect participants as described below under the heading “Global Securities.” We will maintain an office or agency in the Borough of Manhattan, The City of New York where notices and demands in respect of the debt securities and the indentures may be delivered to us and where certificated debt securities may be surrendered for payment, registration of transfer or exchange. That office or agency will initially be an office of the trustee, which is currently located at 100 Wall Street, Suite 1600, New York, New York 10005. (See Section 1002).

You may have your certificated debt securities divided into debt securities of smaller authorized denominations or combined into debt securities of larger authorized denominations, as long as the total principal amount is not changed. This is called an “exchange.” (See Section 305.)

You may exchange or transfer certificated debt securities at the office of the trustee, as security registrar. The security registrar acts as our agent for registering debt securities in the names of holders and transferring and exchanging debt securities. (See Section 305.)

In our discretion, we may change the place for registration of transfer and exchange of the debt securities and for delivery of notices and demands in respect of the debt securities and the applicable indenture and we may remove and/or appoint one or more additional security registrars or act as our own agent for this purpose. (See Sections 305 and 1002.)

There will be no service charge for any transfer or exchange of the debt securities, but you may be required to pay a sum sufficient to cover any tax or other governmental charge payable in connection with the transfer or exchange. We may block the transfer or exchange of (i) any debt securities during a period of 15 days before mailing any notice of redemption of such senior debt securities or (ii) any debt security selected for redemption in whole or in part, except the unredeemed portion of any debt security being redeemed in part. (See Section 305.)

Optional Redemption

The redemption provisions, if any, applicable to the debt securities of any series will be set forth in the applicable prospectus supplement or free writing prospectus.

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We will mail notice of any redemption at least 30 days, but not more than 60 days, before the redemption date to each registered holder of the debt securities to be redeemed. Once notice of redemption is mailed, the debt securities called for redemption will become due and payable on the redemption date and at the applicable redemption price, plus any accrued and unpaid interest to the redemption date. If we elect to redeem all or a portion of the debt securities, that redemption will not be conditional upon receipt by the trustee or other paying agent of monies sufficient to pay the redemption price. (See Section 1104.)

Unless we default in payment of the redemption price and accrued interest, if any, from and after the redemption date the debt securities or portions thereof called for redemption will cease to bear interest. We will pay the redemption price and any accrued interest once the debt securities are surrendered for redemption. (See Section 1105.) If only part of a debt security is redeemed, the trustee will deliver new debt securities of the same series for the remaining portion without charge. (See Section 1106.)

In the event that we elect to redeem only a portion of the debt securities, the debt securities to be redeemed will be selected in accordance with the procedures of DTC, in the case of debt securities represented by one or more global securities, or by the trustee as set forth in the applicable indenture, in the case of debt securities that are not represented by one or more global securities. (See Section 1103.)

Events of Default

An “event of default” occurs with respect to the debt securities of any series if:

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(See Section 501.)

No event of default with respect to a series of debt securities necessarily constitutes an event of default with respect to the debt securities of any other series issued under the applicable indenture.

As of March 31, 2026, the terms of approximately $750 million aggregate principal amount of outstanding senior debt securities that we previously issued under the senior indenture (the “prior senior debt securities”) included the event of default described in the fifth bullet listed in the first paragraph under “—Events of Default” (a so-called “cross-default” event of default), with a threshold amount of at least $25 million. However, we anticipate that future senior debt securities offered by us will not include the event of default described in the fifth bullet listed in the first paragraph under “—Events of Default” or any other “cross-default” event of default. Accordingly, if a series of debt securities offered hereby does not include a “cross-default” event of default, then the principal of and interest on the prior senior debt securities may be declared due and payable immediately upon the occurrence of a “cross-default” event of default, while the holders of the senior debt securities of such series offered hereby will not be entitled to accelerate such debt securities as a result of such event.

Remedies

Acceleration

If an event of default occurs and is continuing with respect to any series of debt securities, then either the trustee or the registered holders of at least 25% in principal amount of the outstanding debt securities of that series may declare the principal amount of all of the debt securities of that series, together with accrued and unpaid interest thereon, to be due and payable immediately, and upon any such declaration the principal of and accrued and unpaid interest on the debt securities of that series shall become immediately due and payable (notwithstanding, in the case of subordinated debt securities, if the terms of the subordinated debt securities of such series permit us to defer or extend the payment of interest thereon, any such extension or deferral). (See Section 502.)

Rescission of Acceleration

After the declaration of acceleration has been made with respect to any series of debt securities and before the trustee has obtained a judgment or decree for payment of the money due, the event of default giving rise to

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the declaration will be deemed to have been waived and the declaration and its consequences will be rescinded and annulled, if:

(See Section 502.)

For more information as to waiver of defaults, see “—Waiver of Default and of Compliance” below.

Control by Registered Holders; Limitations

If an event of default with respect to the debt securities of any series occurs and is continuing, the registered holders of a majority in principal amount of the outstanding debt securities of that series, voting as a single class without regard to the holders of outstanding debt securities of any other series that may also be in default, will have the right to direct the time, method and place of:

These rights of registered holders to give directions are subject to the following limitations:

The trustee may also take any other action it deems proper which is not inconsistent with the registered holders’ direction. (See Sections 512 and 603.)

In addition, each indenture provides that no registered holder of debt securities of any series will have any right to institute any proceeding, judicial or otherwise, with respect to the applicable indenture or for the appointment of a receiver or for any other remedy under the indenture unless:

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Furthermore, no registered holder will be entitled to institute any action if and to the extent that the action would affect, disturb or prejudice the rights of other registered holders of debt securities under the applicable indenture. (See Section 507.)

However, each registered holder has an absolute and unconditional right to receive payment when due and to bring a suit to enforce that right. (See Section 508.)

Notice of Default

The trustee is required to give the registered holders of debt securities of the affected series notice of any default under the applicable indenture with respect to the debt securities of that series to the extent required by the Trust Indenture Act; except that, in the case of an event of default of the character specified above the fourth bullet listed under “—Events of Default,” no notice will be given to such registered holders until at least 30 days after the occurrence of the default. (See Section 602.) The Trust Indenture Act currently permits the trustee to withhold notices of default (except for certain payment defaults) if the trustee in good faith determines the withholding of the notice to be in the interests of the registered holders.

We will furnish the trustee with an annual statement of whether we are in default in the performance or observance of any of the terms, provisions and conditions in the applicable indenture. (See Section 1005.)

Waiver of Default and of Compliance

The registered holders of a majority in principal amount of the outstanding debt securities of any series, voting as a single class without regard to the holders of outstanding debt securities of any other series, may waive, on behalf of all registered holders of the debt securities of that series, any past default under the applicable indenture, except a default in the payment of principal, premium (if any) or interest, or with respect to compliance with certain covenants or provisions of the applicable indenture that cannot be modified or amended without the consent of the registered holder of each outstanding debt security of that series. (See Section 513.)

Compliance with certain covenants in the applicable indenture or otherwise provided with respect to debt securities of any series may be waived before the time specified for compliance by the registered holders of a majority in principal amount of the outstanding debt securities of such series. (See Section 1006.)

Consolidation, Merger and Conveyance of Assets as an Entirety; No Financial Covenants

We have agreed not to consolidate or merge with or into any other entity, or to sell, transfer, lease or otherwise convey our properties and assets as an entirety or substantially as an entirety to any other entity, unless:

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Neither of the indentures nor the debt securities contain any financial or other similar restrictive covenants.

(See Section 801.)

Modification of Indenture

Without Registered Holder Consent

Without the consent of any registered holders of debt securities outstanding under an indenture, we and the trustee may enter into one or more supplemental indentures to such indenture for any of the following purposes:

(See Section 901.)

With Registered Holder Consent

Subject to the following sentence, we and the trustee may, with some exceptions, amend or modify the applicable indenture with the consent of the registered holders of a majority in principal amount of the debt

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securities of each series affected by the amendment or modification. However, no amendment or modification may, without the consent of the registered holder of each outstanding debt security affected thereby:

A supplemental indenture which changes or eliminates any covenant or other provision of the applicable indenture expressly included solely for the benefit of holders of debt securities of one or more particular series will be deemed not to affect the rights under the applicable indenture of the holders of debt securities of any other series.

(See Section 902.)

Defeasance

Each indenture provides, unless the terms of the particular series of debt securities provide otherwise, that we may, upon satisfying several conditions, cause ourselves to be discharged from our obligations, with some exceptions, with respect to any series of debt securities under such indenture, which we refer to as “defeasance.”

One condition we must satisfy is the irrevocable deposit with the trustee, in trust, of money and/or government obligations which, through the scheduled payment of principal and interest on those obligations, would provide sufficient moneys to pay the principal of and any premium and interest on the debt securities of the applicable series on the maturity dates of the payments or upon redemption.

In addition, we will be required to deliver an opinion of counsel to the effect that a holder of debt securities of the applicable series will not recognize income, gain or loss for federal income tax purposes as a result of the defeasance and will be subject to federal income tax on the same amounts, at the same times and in the same manner as if that defeasance had not occurred. The opinion of counsel must be based upon a ruling of the Internal Revenue Service or a change in law after the date of the applicable indenture.

(See Article XIII.)

Satisfaction and Discharge

The applicable indenture will cease to be of further effect with respect to any series of debt securities, and we will be deemed to have satisfied and discharged all of our obligations under the applicable indenture with respect to the debt securities of such series, except as noted below, when:

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Notwithstanding the satisfaction and discharge of the applicable indenture with respect to any series of debt securities, we will remain obligated to pay amounts due under certain provisions of the applicable indenture and to perform certain ministerial tasks as described in the applicable indenture.

(See Section 401.)

Resignation and Removal of the Trustee; Deemed Resignation

The trustee with respect to any series of debt securities may resign at any time by giving written notice to us. The trustee may also be removed with respect to the debt securities of any series by the registered holders of a majority in principal amount of the outstanding debt securities of such series. No resignation or removal of the trustee and no appointment of a successor trustee will become effective until the acceptance of appointment by a successor trustee in accordance with the requirements of the applicable indenture. (See Section 610.)

Subordination

Our subordinated debt securities of each series will be subordinated in right of payment to the prior payment in full of all our Senior Indebtedness (as defined with respect to such series). This means that, with respect to the subordinated debt securities of any series, upon:

the holders of all of our Senior Indebtedness (as defined with respect to the subordinated debt securities of such series) will be entitled to receive:

before the holders of any of the subordinated debt securities of such series are entitled to receive any payment. So long as any of the events in the first three bullets listed above has occurred and is continuing, any amounts payable or assets distributable on the subordinated debt securities of such series will instead be paid or

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distributed, as the case may be, directly to the holders of such Senior Indebtedness (as defined with respect to the subordinated debt securities of such series) to the extent necessary to pay, in the case of the first bullet listed above, all amounts due or to become due upon all such Senior Indebtedness, or, in the case of the second and third bullets listed above, all amounts due on all such Senior Indebtedness, and, if any such payment or distribution is received by the trustee under the subordinated indenture in respect of the subordinated debt securities of such series or by the holders of any of the subordinated debt securities of such series before all such Senior Indebtedness due and to become due or due, as applicable, is paid, the payment or distribution must be paid over to the holders of such unpaid Senior Indebtedness. Subject to paying the applicable Senior Indebtedness due and to become due in the case of the first bullet listed above or the Senior Indebtedness due in the case of the second and third bullets listed above, the holders of the subordinated debt securities of such series will be subrogated to the rights of the holders of such Senior Indebtedness to receive payments applicable to such Senior Indebtedness until the subordinated debt securities of such series are paid in full. (See Sections 1401 and 1403.)

“Senior Indebtedness” means, with respect to the subordinated debt securities of any series, (i) our indebtedness, whether outstanding at the date of the subordinated debt indenture or incurred, created or assumed after such date, (a) in respect of money borrowed by us (including any financial derivative, hedging or futures contract or similar instrument, to the extent any such item is primarily a financing transaction) and (b) evidenced by debentures, bonds, notes, credit or loan agreements or other similar instruments or agreements issued or entered into by us; (ii) all our finance lease obligations; (iii) all our obligations issued or assumed as the deferred purchase price of property, all our conditional sale obligations and all our obligations under any title retention agreement (but excluding, for the avoidance of doubt, trade accounts payable arising in the ordinary course of business and long-term purchase obligations); (iv) all our obligations for the reimbursement of any letter of credit, banker’s acceptance, security purchase facility or similar credit transaction; and (v) all obligations of the type referred to in clauses (i) through (iv) above of other persons for the payment of which we are responsible or liable as obligor, guarantor or otherwise, except for any obligations, instruments or agreements of the type referred to in any of clauses (i) through (v) above that, by the terms of the instruments or agreements creating or evidencing the same or pursuant to which the same is outstanding, are subordinated or equal in right of payment to the subordinated debt securities of such series. (See Section 101.)

Due to the subordination, if our assets are distributed upon our dissolution, winding-up, liquidation or reorganization, holders of our Senior Indebtedness and other indebtedness and obligations that are not equal or junior to subordinated debt securities in right of payment will likely recover more, ratably, than holders of subordinated debt securities and it is possible that no payments will be made to the holders of subordinated debt securities.

The subordination provisions applicable to the subordinated debt securities of any series will cease to apply in the event of defeasance or satisfaction and discharge with respect to the subordinated debt securities of such series. (See Section 1307.)

The subordinated debt securities and the subordinated indenture do not limit us or any of our subsidiaries’ ability to incur additional indebtedness, including, in our case of, Senior Indebtedness. We expect that we will incur, and that our subsidiaries will incur, substantial additional amounts of indebtedness, including, in our case, Senior Indebtedness, in the future. The subordinated debt securities will be structurally subordinated to all indebtedness and other liabilities of our subsidiaries. (See Section 301.)

Conversion Rights

The terms and conditions of any series of debt securities being offered that are convertible into our common stock or other equity securities will be set forth in the applicable prospectus supplement or free writing prospectus. These terms will include the conversion price, the conversion period, provisions as to whether conversion will be at the option of the holder or us, the events requiring an adjustment of the conversion price and provisions affecting conversion if such series of debt securities are redeemed.

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Miscellaneous Provisions

Each indenture provides that certain debt securities, including those for which payment or redemption money has been deposited or set aside in trust as described under “—Satisfaction and Discharge” above, will not be deemed to be “outstanding” in determining whether the registered holders of the requisite principal amount of the outstanding debt securities have given or taken any demand, direction, consent or other action under the indenture as of any date. (See Section 101.)

We will be entitled to set any day as a record date for the purpose of determining the registered holders of outstanding debt securities of any series entitled to give or take any demand, direction, consent or other action under the applicable indenture, in the manner and subject to the limitations provided in the applicable indenture. In certain circumstances, the trustee also will be entitled to set a record date for action by registered holders of any series of outstanding debt securities. If a record date is set for any action to be taken by registered holders of particular debt securities, the action may be taken only by persons who are registered holders of the respective debt securities on the record date. (See Section 104.)

Governing Law

Each indenture and the debt securities will be governed by and construed in accordance with the laws of the State of New York, without regard to conflicts of laws principles thereof. (See Section 112.)

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DESCRIPTION OF OTHER SECURITIES

We will set forth in the applicable prospectus supplement a description of any purchase contracts, units, depositary shares or warrants that may be offered and sold pursuant to this prospectus.

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GLOBAL SECURITIES

Under this heading “Global Securities,” references to “Sempra,” “we,” “us,” “our” and similar terms mean, unless otherwise specified or the context otherwise requires, Sempra excluding its consolidated entities; and references to the “securities” mean the debt securities offered under this prospectus and the applicable prospectus supplement or free writing prospectus.

Book-Entry, Delivery and Form

Unless we indicate differently in any applicable prospectus supplement or free writing prospectus, the debt securities of each series initially will be issued in book-entry form and represented by one or more global debt securities, which we refer to as “global securities.” The global securities will be deposited with, or on behalf of, DTC, as depositary (which we sometimes refer to as the “depositary”), and registered in the name of Cede & Co., the nominee of DTC. Unless and until it is exchanged for definitive debt securities in certificated form registered in the names of persons other than the depositary or its nominee, which we refer to as “certificated securities,” under the limited circumstances described below, a global security may not be transferred except as a whole by the depositary to its nominee or by the nominee to the depositary, or by the depositary or its nominee to a successor depositary or to a nominee of the successor depositary.

DTC has advised us that it is:

DTC holds securities that its participants deposit with DTC. DTC also facilitates the settlement among its participants of securities transactions, such as transfers and pledges, in deposited securities through electronic computerized book-entry changes in participants’ accounts, thereby eliminating the need for physical movement of securities certificates. “Direct participants” in DTC include securities brokers and dealers, including underwriters, banks, trust companies, clearing corporations and other organizations. Indirect access to the DTC system is also available to others, which we sometimes refer to as “indirect participants,” that clear transactions through or maintain a custodial relationship with a direct participant, either directly or indirectly. The rules applicable to DTC and its participants are on file with the SEC.

Purchases of securities under the DTC system must be made by or through direct participants, which will receive a credit for the securities on DTC’s records. The ownership interest of the actual purchaser of a security, which we sometimes refer to as a “beneficial owner,” is in turn recorded on the direct and indirect participants’ records. Beneficial owners of securities will not receive written confirmation from DTC of their purchases. However, beneficial owners are expected to receive written confirmations providing details of their transactions, as well as periodic statements of their holdings, from the direct or indirect participants through which they purchased securities. Transfers of ownership interests in global securities are to be accomplished by entries made on the books of participants acting on behalf of beneficial owners. Beneficial owners will not receive certificates representing their ownership interests in the global securities, except under the limited circumstances described below.

To facilitate subsequent transfers, all global securities deposited by direct participants with DTC will be registered in the name of DTC’s nominee, Cede & Co., or such other name as may be requested by an authorized representative of DTC. The deposit of securities with DTC and their registration in the name of Cede & Co. or

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such other nominee will not change the beneficial ownership of the securities. DTC has no knowledge of the actual beneficial owners of the securities. DTC’s records reflect only the identity of the direct participants to whose accounts the securities are credited, which may or may not be the beneficial owners. The participants are responsible for keeping account of their holdings on behalf of their customers.

So long as the securities are in book-entry form, you will receive payments and may transfer securities only through the facilities of the depositary and its direct and indirect participants.

Conveyance of notices and other communications by DTC to direct participants, by direct participants to indirect participants and by direct participants and indirect participants to beneficial owners will be governed by arrangements among them, subject to any legal requirements in effect from time to time.

Redemption notices will be sent to DTC. If less than all of the global securities of a particular series are being redeemed, DTC’s practice is to determine by lot the amount of the beneficial interest of each direct participant in the global securities of such series to be redeemed.

In any case where a consent or vote may be required with respect to any securities, neither DTC nor Cede & Co. (or such other DTC nominee) will consent or vote with respect to the applicable global securities. Under its usual procedures, DTC will mail an omnibus proxy to us as soon as possible after the record date. The omnibus proxy assigns the consenting or voting rights of Cede & Co. (or such other DTC nominee) to those direct participants to whose accounts beneficial interests in such global securities are credited on the record date, identified in a listing attached to the omnibus proxy.

So long as securities are in book-entry form, we will make payments on those securities to the depositary or its nominee, as the registered owner of such securities, by wire transfer of immediately available funds. If certificated securities are issued under the limited circumstances described below, we will have the option of making payments by check mailed to the addresses of the persons entitled to payment as such addresses shall appear in the security register or by wire transfer at such places and to such accounts at such banking institutions in the United States as may be designated in writing to the applicable trustee at least 15 days before the applicable payment date by the persons entitled to payment.

DTC’s practice is to credit direct participants’ accounts upon DTC’s receipt of funds from us on the payment date in accordance with their respective holdings shown on DTC records. Payments by participants to beneficial owners will be governed by standing instructions and customary practices, as is the case with securities held for the account of customers in bearer form or registered in “street name.” Those payments will be the responsibility of participants and not of DTC or us, subject to any statutory or regulatory requirements in effect from time to time. Payment of the principal of, premium (if any) and interest on the global securities to Cede & Co., or such other nominee as may be requested by an authorized representative of DTC, is our responsibility, disbursement of payments to direct participants is the responsibility of DTC, and disbursement of payments to the beneficial owners is the responsibility of direct and indirect participants.

Except under the limited circumstances described below, purchasers of securities will not be entitled to have securities registered in their names and will not receive physical delivery of securities. Accordingly, each beneficial owner must rely on the procedures of DTC and its participants to exercise any rights under the securities and the applicable indenture.

The laws of some jurisdictions may require that some purchasers of securities take physical delivery of securities in definitive form. Those laws may impair the ability to transfer or pledge beneficial interests in securities.

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As noted above, beneficial owners of a particular series of securities generally will not receive certificates representing their ownership interests in those securities. However, if:

we will prepare and deliver certificated securities of such series in exchange for beneficial interests in the global securities. Any beneficial interest in a global security that is exchangeable under the circumstances described in the preceding sentence will be exchangeable for certificated securities of such series in definitive form registered in the names that the depositary directs. It is expected that these directions will be based upon directions received by the depositary from its participants with respect to ownership of beneficial interests in the global securities.

Euroclear and Clearstream

If so provided in the applicable prospectus supplement, you may hold interests in a global security through Clearstream Banking S.A., which we refer to as “Clearstream,” or Euroclear Bank S.A./N.V., as operator of the Euroclear System, which we refer to as “Euroclear,” either directly if you are a participant in Clearstream or Euroclear or indirectly through organizations which are participants in Clearstream or Euroclear. Clearstream and Euroclear will hold interests on behalf of their respective participants through customers’ securities accounts in the names of Clearstream and Euroclear, respectively, on the books of their respective U.S. depositaries, which in turn will hold such interests in customers’ securities accounts in such depositaries’ names on DTC’s books.

Clearstream and Euroclear are securities clearance systems in Europe. Clearstream and Euroclear hold securities for their respective participating organizations and facilitate the clearance and settlement of securities transactions between those participants through electronic book-entry changes in their accounts, thereby eliminating the need for physical movement of certificates.

Payments, deliveries, transfers, exchanges, notices and other matters relating to beneficial interests in global securities owned through Euroclear or Clearstream must comply with the rules and procedures of those systems. Transactions between participants in Euroclear or Clearstream, on one hand, and other participants in DTC, on the other hand, are also subject to DTC’s rules and procedures.

Investors will be able to make and receive through Euroclear and Clearstream payments, deliveries, transfers and other transactions involving any beneficial interests in global securities held through those systems only on days when those systems are open for business. Those systems may not be open for business on days when banks, brokers and other institutions are open for business in the United States.

Cross-market transfers between participants in DTC, on the one hand, and participants in Euroclear or Clearstream, on the other hand, will be effected through DTC in accordance with the DTC’s rules on behalf of Euroclear or Clearstream, as the case may be, by their respective U.S. depositaries; however, such cross-market transactions will require delivery of instructions to Euroclear or Clearstream, as the case may be, by the counterparty in such system in accordance with the rules and procedures and within the established deadlines (European time) of such system. Euroclear or Clearstream, as the case may be, will, if the transaction meets its settlement requirements, deliver instructions to its U.S. depositary to take action to effect final settlement on its

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behalf by delivering or receiving interests in the global securities through DTC, and making or receiving payment in accordance with normal procedures for same-day fund settlement. Participants in Euroclear or Clearstream may not deliver instructions directly to their respective U.S. depositaries.

Due to time zone differences, the securities accounts of a participant in Euroclear or Clearstream purchasing an interest in a global security from a direct participant in DTC will be credited, and any such crediting will be reported to the relevant participant in Euroclear or Clearstream, during the securities settlement processing day (which must be a business day for Euroclear or Clearstream) immediately following the settlement date of DTC. Cash received in Euroclear or Clearstream as a result of sales of interests in a global security by or through a participant in Euroclear or Clearstream to a direct participant in DTC will be received with value on the settlement date of DTC but will be available in the relevant Euroclear or Clearstream cash account only as of the business day for Euroclear or Clearstream following DTC’s settlement date.

Other

The information under this heading “Global Securities” concerning DTC, Clearstream, Euroclear and their respective book-entry systems has been obtained from sources that we believe to be reliable, but we do not take responsibility for this information. This information has been provided solely as a matter of convenience. The rules and procedures of DTC, Clearstream and Euroclear are solely within the control of those organizations and could change at any time. Neither we nor the trustee nor any agent of ours or of the trustee, nor any broker, dealer, underwriter or agent of ours involved in the offer or sale of any securities, has any control over those entities and none of us or them takes any responsibility for their activities. You are urged to contact DTC, Clearstream and Euroclear or their respective participants directly to discuss those matters. In addition, although we expect that DTC, Clearstream and Euroclear will perform the foregoing procedures, none of them is under any obligation to perform or continue to perform such procedures and such procedures may be discontinued at any time. Neither we nor the trustee nor any agent of ours or of the trustee, nor any broker, dealer, underwriter or agent of ours involved in the offer or sale of any securities, will have any responsibility for the performance or nonperformance by DTC, Clearstream and Euroclear or their respective participants of these or any other rules or procedures governing their respective operations.

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PLAN OF DISTRIBUTION

We may sell the securities offered pursuant to this prospectus from time to time:

We will identify the specific plan of distribution, including any underwriters, dealers, agents or direct purchasers and their respective compensation, in the applicable prospectus supplement.

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LEGAL MATTERS

Latham & Watkins LLP will pass upon certain legal matters relating to the issuance and sale of the securities offered hereby on behalf of Sempra. Additional legal matters may be passed upon for us or any underwriters, dealers or agents, by counsel that we will name in the applicable prospectus supplement.

EXPERTS

The financial statements of Sempra incorporated by reference in this prospectus and the effectiveness of Sempra’s internal control over financial reporting, have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports. Such financial statements are incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

The financial statements of Oncor Electric Delivery Holdings Company LLC incorporated by reference in this prospectus, have been audited by Deloitte & Touche LLP, independent auditors, as stated in their report. Such financial statements are incorporated in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

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$    Floating Rate Notes due 2028

Preliminary Prospectus Supplement

Joint Book-Running Managers

BMO Capital Markets

Academy Securities

    , 2026