As filed with the Securities and Exchange Commission on July 16, 2026.

Registration No. 333-282818

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 1

ON FORM S-3

TO

FORM S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

SUNOCO LP

(Exact name of registrant as specified in its charter)

8111 Westchester Drive, Suite 400

Dallas, Texas 75225

(214) 981-0700

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Dylan A. Bramhall

Sunoco GP LLC

8111 Westchester Drive, Suite 400

Dallas, Texas 75225

(214) 981-0700

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

E. Ramey Layne

Jackson A. O’Maley

Vinson & Elkins L.L.P.

845 Texas Ave, Suite 4700

Houston, Texas 77002

(713) 758-2222

APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time to time after the effective date of this registration statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box:  ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box:  ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.  ☒

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act of 1933. ☐

EXPLANATORY NOTE

On July 6, 2026, Sunoco LP (the “Registrant”) changed its state of domicile from the State of Delaware to the State of Texas pursuant to a plan of conversion. This redomiciliation was approved by the board of directors of the general partner in reliance in part on the recommendation of a special committee of the board of directors of the Registrant’s general partner. As a result of the redomiciliation, among other things, the affairs of the Registrant ceased to be governed by the Delaware Revised Uniform Limited Partnership Act and became subject to the Texas Business Organizations Code (the “TBOC”); the certificate of limited partnership and Third Amended and Restated Agreement of Limited Partnership of the Registrant, as amended by Amendment No. 1 to the Third Amended and Restated Agreement of Limited Partnership of the Registrant, that were in effect immediately prior to the redomiciliation were replaced by a new certificate of formation filed with the Secretary of State of the State of Texas and the Agreement of Limited Partnership of the Registrant (the “Texas Partnership Agreement”) approved in connection with the redomiciliation and plan of conversion; and each common unit of the Registrant as a Delaware limited partnership was converted into a common unit of the Registrant as a Texas limited partnership.

Pursuant to Rule 414 under the Securities Act of 1933, as amended (the “Securities Act”), on the date hereof the Registrant is filing this Post-Effective Amendment No. 1 to the Registration Statement on Form S-3, File No. 333-282818 (the “Registration Statement”), solely to reflect the change in the Registrant’s state of domicile as a result of the redomiciliation or as necessary to keep the Registration Statement from being misleading in any material respect. The Registration Statement was originally filed by the Registrant with the Securities and Exchange Commission (the “SEC”) on October 24, 2024. Pursuant to Rule 414(d), the Registrant expressly adopts the Registration Statement, as modified by this Post-Effective Amendment No. 1, as its own for all purposes of the Securities Act and Securities Exchange Act of 1934, as amended (the “Exchange Act”), as a result of the redomiciliation.

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

The information set forth in this item is incorporated by reference from Item 14 of the Registrant’s Registration Statement on Form S-3 (File No. 333-282818), filed with the SEC on October 24, 2024.

As provided in the Texas Partnership Agreement, which is incorporated herein by reference, the Registrant will generally indemnify its general partner, officers, directors and affiliates of its general partner to the fullest extent permitted by law against all losses, claims, damages or similar events; provided, that the indemnitee will not be indemnified and held harmless if there has been a final and non-appealable judgment entered by a court of competent jurisdiction determining that, in respect of the matter for which the indemnitee is seeking indemnification, the indemnitee acted in bad faith or engaged in fraud, willful misconduct, or in the case of a criminal matter, acted with knowledge that the indemnitee’s conduct was unlawful. To the fullest extent permitted by applicable law, Chapter 8 of the TBOC shall not apply to the Registrant, any partners or any indemnitee.

To the extent that the indemnification provisions of the Texas Partnership Agreement purport to include indemnification for liabilities arising under the Securities Act, in the opinion of the SEC, such indemnification is contrary to public policy and is therefore unenforceable.

The Registrant also maintains insurance coverage under a policy insuring its directors and officers against certain liabilities which they may incur in their capacity as such.

(a) The undersigned registrant hereby undertakes:

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provided, however, that paragraphs (a)(1)(i), (a)(1)(ii), and (a)(1)(iii) above do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) under the Securities Act that is a part of the registration statement.

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(b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions described under Item 15, or otherwise, the registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by the registrant is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Dallas, Texas, on July 16, 2026.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities indicated, which are with Sunoco GP LLC, the general partner of Sunoco LP, on July 16, 2026.

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