Amendment: SEC Form SCHEDULE 13D/A filed by The Oncology Institute Inc.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 4)
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Oncology Institute, Inc. (Name of Issuer) |
Common Stock, par value $0.0001 per share (Title of Class of Securities) |
23343Q100 (CUSIP Number) |
Gabriel Ling c/o M33 Growth I LP, 888 Boylston Street, Suite 500 Boston, MA, 02199 6178770046 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) |
09/04/2025 (Date of Event Which Requires Filing of This Statement) |

SCHEDULE 13D
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CUSIP No. | 23343Q100 |
1 |
Name of reporting person
M33 Growth I LP | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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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
9,290,838.00 | ||||||||
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)
9.79 % | ||||||||
14 | Type of Reporting Person (See Instructions)
PN |
SCHEDULE 13D
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CUSIP No. | 23343Q100 |
1 |
Name of reporting person
M33 Growth I GP LLC | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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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
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
9,290,838.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
![]() | ||||||||
13 | Percent of class represented by amount in Row (11)
9.79 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
SCHEDULE 13D
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CUSIP No. | 23343Q100 |
1 |
Name of reporting person
TOI M, LLC | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
![]() ![]() | ||||||||
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
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
590,892.00 | ||||||||
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)
0.63 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
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. 4 (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, and Amendment No. 3 filed with the SEC on March 28, 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 | |
On September 4, 2025, M33 sold 6,018,168 shares of Common Stock and TOI M sold 681,832 shares of Common Stock, in each case at a sale price of $3.09 per share (the "Sale Price"), in a transaction registered under the Securities Act of 1933, as amended, pursuant to an effective registration statement filed by the Issuer on Form S-3 (such transaction, the "Block Trade"). | ||
Item 4. | Purpose of Transaction | |
Item 4 is hereby supplemented as follows: The information set forth in Item 3 of this Statement, 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 Statement. | |
(b) | Except as reported in this Statement, none of the Reporting Persons has effected any transactions in the Issuer's securities within the past 60 days. | |
(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) | Not applicable. | |
Item 6. | Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer | |
Item 6 is hereby supplemented as follows: The information set forth in Items 3 and 4 of this Statement is incorporated herein by reference.
In connection with the Block Trade, M33 LP entered into a Lock-Up Agreement (the Lock-Up Agreement") with B. Riley Securities, Inc. ("B. Riley") pursuant to which M33 LP agreed not to sell or otherwise transfer any shares of Common Stock or securities convertible or exercisable for shares of Common Stock, subject to customary exceptions, for a 180 day period beginning on September 4, 2025 and ending on March 3, 2026 (the "Lock-Up Period"). The Lock-Up Period is subject to early termination if the closing price of the Common Stock exceeds 140% of the Sale Price for four out of five consecutive trading days. The foregoing description is qualified in its entirety by reference to the Lock-Up Agreement filed as Exhibit 1 to this Amendment. | ||
Item 7. | Material to be Filed as Exhibits. | |
Item 7 is hereby supplemented as follows:
Lock-Up Agreement, dated August 21, 2025, by and between M33 Growth I LP and B. Riley Securities, Inc. |
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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