Form SCHEDULE 13D/A Oncology Institute, Inc. Filed by: M33 Growth I L.P.
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 6)*
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Oncology Institute, Inc. (Name of Issuer) |
Common Stock, par value $0.0001 per share (Title of Class of Securities) |
(CUSIP Number) |
Gabriel Ling c/o M33 Growth I LP, 888 Boylston Street, Suite 500 Boston, MA, 02199 6172045104 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) |
05/14/2026 (Date of Event Which Requires Filing of This Statement) |
If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.
The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the
Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other
provisions of the Act (however, see the Notes).
SCHEDULE 13D
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| CUSIP No. |
| 1 |
Name of reporting person
M33 Growth I L.P. | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b) | ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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| 6 | Citizenship or place of organization
DELAWARE
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
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| 11 | Aggregate amount beneficially owned by each reporting person
5,002,656.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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| 13 | Percent of class represented by amount in Row (11)
4.94 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person:
(1) This Schedule 13D is filed by M33 Growth I LP ("M33 LP"), M33 Growth I GP LLC ("M33 LLC") and TOI M, LLC ("TOI M" and, with M33 LP, collectively, the "Reporting Persons"). The Reporting Persons expressly disclaim status as a "group" for purposes of this Schedule 13D. (2) Consists of (i) 3,644,207 shares held by M33 LP and (ii) 1,358,449 shares issuable upon exercise of warrants to purchase shares of Common Stock (as defined herein) for an exercise price of $1.1980 per share ("Warrants") held by M33 LP. M33 LLC serves as the sole general partner of M33 LP and, as such, M33 LLC possesses voting and dispositive power over the shares held by M33 LP, and may be deemed to have indirect beneficial ownership of the shares held by M33 LP. (3) This percentage is calculated based upon 99,982,933 shares of the Issuer's (as defined herein) common stock outstanding as of April 30, 2026, as disclosed in the Quarterly Report on Form 10-Q for the quarter ended March 31, 2026 filed by the Issuer with the Securities and Exchange Commission (the "SEC") on May 7, 2026 and the 1,358,449 shares issuable upon exercise of the Warrants.
SCHEDULE 13D
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| CUSIP No. |
| 1 |
Name of reporting person
M33 Growth I GP LLC | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b) | ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
AF | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
DELAWARE
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 11 | Aggregate amount beneficially owned by each reporting person
5,002,656.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
| ||||||||
| 13 | Percent of class represented by amount in Row (11)
4.94 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
(1) This Schedule 13D is filed by the Reporting Persons. The Reporting Persons expressly disclaim status as a "group" for purposes of this Schedule 13D. (2) Consists of (i) 3,644,207 shares held by M33 LP and (ii) 1,358,449 shares issuable upon exercise of Warrants held by M33 LP. M33 LLC serves as the sole general partner of M33 LP and, as such, M33 LLC possesses voting and dispositive power over the shares held by M33 LP, and may be deemed to have indirect beneficial ownership of the shares held by M33 LP. (3) This percentage is calculated based upon 99,982,933 shares of the Issuer's (as defined herein) common stock outstanding as of April 30, 2026, as disclosed in the Quarterly Report on Form 10-Q for the quarter ended March 31, 2026 filed by the Issuer with the Securities and Exchange Commission (the "SEC") on May 7, 2026 and the 1,358,449 shares issuable upon exercise of the Warrants.
SCHEDULE 13D
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| CUSIP No. |
| 1 |
Name of reporting person
TOI M, LLC | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b) | ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
DELAWARE
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
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| 11 | Aggregate amount beneficially owned by each reporting person
0.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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| 13 | Percent of class represented by amount in Row (11)
0.00 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
(1) This Schedule 13D is filed by the Reporting Persons, including TOI M, LLC. Following the distribution of shares of Common Stock previously reported, TOI M, LLC no longer beneficially owns any shares of the Issuer's Common Stock.
SCHEDULE 13D
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| Item 1. | Security and Issuer | |
| (a) | Title of Class of Securities:
Common Stock, par value $0.0001 per share | |
| (b) | Name of Issuer:
Oncology Institute, Inc. | |
| (c) | Address of Issuer's Principal Executive Offices:
18000 Studebaker Road, Suite 800, Cerritos,
CALIFORNIA
, 90703. | |
Item 1 Comment:
This Amendment No. 6 (the "Amendment") to Schedule 13D amends and supplements the Schedule 13D originally filed with the SEC on November 22, 2021, as amended by Amendment No. 1 filed with the SEC on July 12, 2022, Amendment No. 2 filed with the SEC on September 26, 2022, Amendment No. 3 filed with the SEC on March 28, 2025, Amendment No. 4 filed with the SEC on September 5, 2025 and Amendment No. 5 filed with the SEC on November 20, 2025 (as amended, the "Schedule 13D"), on behalf of M33 Growth I LP ("M33 LP"), M33 Growth I GP LLC ("M33 LLC") and TOI M, LLC ("TOI M" and, together with M33 LP and M33 LLC, collectively, the "Reporting Persons"), relates to the common stock, $0.001 par value ("Common Stock"), of The Oncology Institute, Inc., a Delaware corporation (the "Issuer" or "TOI"). The Items below amend and supplement the information disclosed under the corresponding Items of Schedule 13D as described below. Except as specifically provided herein, this Amendment does not modify any of the information previously reported in the Schedule 13D. Capitalized terms used but not defined herein shall have the meanings given to such terms in the Schedule 13D. | ||
| Item 3. | Source and Amount of Funds or Other Consideration | |
Between May 8, 2026 and May 14, 2026, M33 LP sold an aggregate of 1,800,000 shares in open market transactions on Nasdaq. | ||
| Item 4. | Purpose of Transaction | |
Item 4 is hereby supplemented as follows: The information set forth in Item 3 of this Schedule 13D, as amended therein, is incorporated herein by reference. | ||
| Item 5. | Interest in Securities of the Issuer | |
| (a) | Item 5 is hereby amended and restated as follows: (a) and (b) See Items 7-11 of the cover pages of this Statement, as amended, and Item 3 of the Schedule 13D. | |
| (b) | Between May 8, 2026 and May 14, 2026, M33 LP sold an aggregate of 1,800,000 shares in open market transactions on Nasdaq as follows:
DATE SHARES SALE PRICE
May 8, 2026 347,674 $4.0290
May 11, 2026 277,521 $4.0120
May 12, 2026 129,805 $4.0181
May 13, 2026 280,000 $4.1358
May 13, 2026 245,000 $4.1113
May 14, 2026 520,000 $4.0700 | |
| (c) | No other person is known to the Reporting Persons to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Common Stock covered by this Statement. | |
| (d) | The Reporting Persons ceased to beneficially own five percent or more of the Common Stock upon completion of the sale on May 14, 2026 described above. | |
| Item 6. | Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer | |
There are no amendments or supplements to the information previously set forth in Item 6 of the Schedule 13D. | ||
| Item 7. | Material to be Filed as Exhibits. | |
There are no amendments or supplements to the information previously set forth in Item 7 of the Schedule 13D | ||
| SIGNATURE | |
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
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