# EDGAR Filing Document

**Accession Number:** 0001913257
**File Stem:** 0001493152-25-026173
**Filing Date:** 2025-12
**Character Count:** 9112
**Document Hash:** e490d3220d3ad23cffee6109c62121d0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-25-026173.hdr.sgml**: 20251204

**ACCESSION NUMBER**: 0001493152-25-026173

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251204

**DATE AS OF CHANGE**: 20251204

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MAIA Biotechnology, Inc.
- **CENTRAL INDEX KEY:** 0001878313
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-93731
- **FILM NUMBER:** 251549403

**BUSINESS ADDRESS:**
- **STREET 1:** 444 WEST LAKE STREET, SUITE 1700
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 312-416-8592

**MAIL ADDRESS:**
- **STREET 1:** 444 WEST LAKE STREET, SUITE 1700
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Vitoc Vlad
- **CENTRAL INDEX KEY:** 0001913257

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **STREET 1:** 444 WEST LAKE STREET, SUITE 1700
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

### UNITED STATES 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**<br>444 WEST LAKE STREET, Suite 1700<br>CHICAGO IL 60606<br>(312) 416-8592

*(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)*

| **CUSIP No.** | **552641102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Vlad Vitoc** | Name of reporting person<br>**Vlad Vitoc** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**3285623.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**560729.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**3285623.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**560729.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**3846352.00** | Aggregate amount beneficially owned by each reporting person<br>**3846352.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**9.66%** | Percent of class represented by amount in Row (11)<br>**9.66%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for 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.

**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, IL, 60606

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 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

**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.

**Reporting Person:** Vlad Vitoc

**Signature:** /s/ Vlad Vitoc

**Name/Title:** Vlad Vitoc

**Date:** 12/04/2025