MAIA Biotechnology CEO Vlad Vitoc reports 9.66% ownership stake

MAIA Biotechnology CEO Vlad Vitoc reports updated ownership of the company’s common stock.

Rhea-AI Filing Summary

MAIA Biotechnology CEO Vlad Vitoc reports updated ownership of the company’s common stock. He beneficially owns 3,846,352 shares of MAIA Biotechnology, Inc. common stock, representing 9.66% of the outstanding shares, based on 39,805,300 shares outstanding as of December 2, 2025. His holdings include shares owned directly by him and his spouse, as well as shares issuable upon the exercise of stock options and warrants held by him and certain family trusts. The filing states that he acquired these shares through equity award grants under the company’s incentive plans and through open-market purchases with personal funds.

The filing notes that Vitoc holds the shares for investment purposes and may buy more or sell some in the future, or use hedging strategies, subject to applicable law. During the 60 days prior to the filing, he purchased 94,300 shares of MAIA common stock in the open market at prices generally around $1 per share on several dates in November 2025.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many MAIA (MAIA) shares does Vlad Vitoc currently beneficially own?

Vlad Vitoc beneficially owns 3,846,352 shares of MAIA Biotechnology, Inc. common stock, as reported in this Schedule 13D/A amendment.

What percentage of MAIA (MAIA) does Vlad Vitoc’s stake represent?

Vlad Vitoc’s beneficial ownership represents 9.66% of MAIA Biotechnology’s common stock, based on 39,805,300 shares

How is Vlad Vitoc’s MAIA (MAIA) shareholding structured?

The 3,846,352 shares consist of common stock held directly by Vlad Vitoc and his spouse, plus shares issuable upon the exercise of stock options and warrants held by him, his spouse, and two 2022 MAIA irrevocable trusts established for his children.

Has Vlad Vitoc recently bought additional MAIA (MAIA) shares in the market?

Yes. Over the past 60 days, he purchased 94,300 shares of MAIA common stock in open-market transactions, including trades on November 21, 24, 25, 26 and 28, 2025 at prices around $0.92–$1.14 per share.

Why does Vlad Vitoc hold MAIA (MAIA) shares, according to the filing?

The filing states that he acquired the MAIA common stock for investment purposes, and that he may buy additional shares or sell some of his holdings in the future, subject to applicable law.

Does Vlad Vitoc have any current plans to change control or strategy at MAIA (MAIA)?

The filing states that he has no present plan or proposal that would result in the types of actions listed in Item 4 of Schedule 13D, such as changes in control or major corporate transactions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 12/04/2025 - 04:05 PM EST Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 1)

MAIA Biotechnology, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

552641102

(CUSIP Number)

Vlad Vitoc
444 WEST LAKE STREET, Suite 1700,
CHICAGO, IL, 60606
(312) 416-8592

Richard A. Friedman, Esq.
30 Rockefeller Plaza,
New York, NY, 10112
(212) 653-8700

Greg Carney, Esq.
30 Rockefeller Plaza,
New York, NY, 10112
(212) 653-8700

Sheppard Mullin
30 Rockefeller Plaza,
New York, NY, 10112
(212) 653-8700

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

11/21/2025

(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

CUSIP No. 552641102

1

Name of reporting person

Vlad Vitoc

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)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 3,285,623.00
8	Shared Voting Power 560,729.00
9	Sole Dispositive Power 3,285,623.00
10	Shared Dispositive Power 560,729.00

11

Aggregate amount beneficially owned by each reporting person

3,846,352.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

9.66 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

(1) Consists of 3,846,352 shares consisting of: (i) 903,421 shares of common stock directly held by Mr. Vitoc and 210,100 shares of common stock directly held by his spouse, and (ii) 2,382,202 shares of common stock issuable upon the exercise of stock options and warrants directly held by Mr. Vitoc, 28,159 shares of common stock issuable upon the exercise of stock options directly held by Mr. Vitoc's spouse, 161,235 shares of common stock issuable upon the exercise of stock options directly held by Maia Laetitia Cristian Vitoc 2022 MAIA Irrevocable Trust, for the benefit of Mr. Vitoc's child, for which Mr. Vitoc's spouse serves as trustee, and 161,235 shares of common stock issuable upon the exercise of stock options directly held by Leia Violeta Ioana Vitoc 2022 MAIA Irrevocable Trust, for the benefit of Mr. Vitoc's child, for which Mr. Vitoc's spouse serves as trustee. Mr. Vitoc disclaims beneficial ownership of the shares beneficially owned by his spouse, Maia Laetitia Cristian Vitoc 2022 MAIA Irrevocable Trust, and Leia Violeta Ioana Vitoc 2022 MAIA Irrevocable Trust. (2) Based on 39,805,300 shares of Common Stock outstanding as of December 2, 2025, calculated by adding (i) the 37,072,469 shares of Common Stock outstanding as of December 2, 2025 according to the Company's records, and (ii) the 2,732,831 shares of Common Stock beneficially owned by the Reporting Person, which are issuable upon the conversion of options and warrants exercisable within 60 days of the date hereof.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock, $0.0001 par value
(b)	Name of Issuer: MAIA Biotechnology, Inc.
(c)	Address of Issuer's Principal Executive Offices: 444 WEST LAKE STREET, Suite 1700, CHICAGO, ILLINOIS , 60606.
Item 1 Comment: This Statement of Beneficial Ownership on Schedule 13D is filed by the Reporting Person (as defined below) on December 2, 2025, (this "Statement" or "Schedule 13D") and relates to the common stock, $0.0001 par value per share (the "Common Stock") of MAIA Biotechnology, Inc., a Delaware corporation (the "Company"). The Company's principal executive offices are located at 444 West Lake Street, Suite 1700, Chicago, IL 60606.
Item 2.	Identity and Background
(a)	This Statement is filed by Vlad Vitoc. Mr. Vitoc is the Chief Executive Officer and Chairman of the Board of Directors of the Company. The principal business address of Mr. Vitoc is 444 West Lake Street, Suite 1700, Chicago, IL 60606. Mr. Vitoc is a citizen of the United States. The foregoing person is sometimes referred to herein as the "Reporting Person". The Reporting Person has not during the last five years been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). The Reporting Person has not during the last five years been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
Item 3.	Source and Amount of Funds or Other Consideration
	The information contained in rows 7, 8, 9, 10, 11 and 13 on the cover page of this Schedule 13D is incorporated by reference in its entirety into this Item 3. The shares of Common Stock that the Reporting Person beneficially owns were acquired through grants of equity awards pursuant to the Issuer's various equity incentive plans or through open market purchases at various times with personal funds of the Reporting Person.
Item 4.	Purpose of Transaction
	The Reporting Person acquired the Common Stock reported in this Statement for investment purposes. The Reporting Person may in the future acquire additional Common Stock or dispose of some or all of the Common Stock held by the Reporting Person in open-market transactions or privately negotiated transactions, on such terms and at such times as the Reporting Person may deem advisable. The Reporting Person may engage in short selling or hedging or similar transactions with respect to the Common Stock, on such terms and at such times as the Reporting Person may deem advisable, subject to applicable law. The Reporting Person has no present plan or proposal that would result in any of the actions described in paragraphs (a) through (j) of Item 4 of Schedule 13D. The Reporting Person reserves the right in the future to formulate any such plans or proposals, and to take any actions with respect to their investments in the Company, including any or all of the actions described in paragraphs (a) through (j) of Item 4 of Schedule 13D.
Item 5.	Interest in Securities of the Issuer
(a)	See responses to Items 11 and 13 on the cover page.
(b)	See responses to Items 7, 8, 9 and 10 on the cover page.
(c)	The Reporting Person purchased 94,300 shares of Common Stock in the following transactions during the past 60 days. All shares of Common Stock reported below were purchased by the Reporting Person in the open market. Date Number of Shares Purchased Average Purchase Price 11/21/2025 1,800 $0.92 11/24/2025 10,000 $0.9891 11/25/2025 10,500 $0.9661 11/26/2025 22,000 $1.0463 11/28/2025 50,000 $1.1366
(d)	Not applicable.
(e)	Not applicable.
Item 6.	Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer
	Except as described under Items 3, 4 and 5 and as set out in Item 6, to the best knowledge of the Reporting Person, there are no contracts, arrangements, understandings or relationships (legal or otherwise) between these shareholders and any other person with respect to any securities of the Company, including but not limited to transfer or voting of any securities of the Company, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or loss, or the giving or withholding of proxies, or a pledge or contingency the occurrence of which would give another person voting power over the securities of the Company.

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.

Vlad Vitoc

Signature:	/s/ Vlad Vitoc
Name/Title:	Vlad Vitoc
Date:	12/04/2025