MAIA CEO buys 73,000 shares at $1.37

MAIA’s CEO and ten percent owner Vlad Vitoc reported a sizable open-market stock purchase and updated his direct and indirect share holdings.

Available on EDGAR 09/15/2026 - 06:33 AM EDT Accepted by SEC EDGAR 09/15/2026 - 06:33 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

MAIA Biotechnology, Inc. (MAIA) director, chief executive officer, and ten percent owner Vlad Vitoc reported purchasing 73,000 shares of common stock on September 14, 2026 in an open-market or private transaction at $1.37 per share. Following this purchase, he holds 1,049,121 shares directly. An additional 210,100 shares are reported as indirectly owned through his spouse, with beneficial ownership disclaimed except for his pecuniary interest. No Rule 10b5-1 trading plan is reported for these transactions.

Insider Trade Summary

Net Buyer: 73,000 shares

Net Buy 1 txn

Insider Vitoc Vlad

Role Chief Executive Officer

Bought 73,000 shs ($100K)

Increase in Position 7.5%

Type	Security	Shares	Price	Value
Purchase	Common Stock	73,000	$1.37	$100K
Holding	Common Stock F1	--	--	--

Holdings After Transaction: Common Stock — 1,049,121 shares (Direct); Common Stock — 210,100 shares (Indirect, See Footnote)

Holdings Before and After: Common Stock, 976,121 to 1,049,121 shares (Direct)

Other Insiders: 1 other insider reported open-market purchases of this stock in the 30 days up to this filing.

Footnotes (1)

1. F1. These securities are beneficially owned by Mr. Vitoc's spouse. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

Key Figures

Shares purchased: 73,000 shares Purchase price per share: $1.37 per share Direct holdings after transaction: 1,049,121 shares +1 more

4 metrics

Shares purchased 73,000 shares Open-market or private purchase on September 14, 2026

Purchase price per share $1.37 per share Price for the 73,000 MAIA common shares acquired

Direct holdings after transaction 1,049,121 shares MAIA common stock directly owned by Vlad Vitoc after the purchase

Indirect holdings via spouse 210,100 shares MAIA shares beneficially owned by Mr. Vitoc’s spouse, with beneficial ownership disclaimed except for pecuniary interest

Key Terms

Rule 10b5-1, pecuniary interest, beneficial ownership, indirect ownership

4 terms

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported for these transactions"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

pecuniary interest financial

"except to the extent of his pecuniary interest therein"

beneficial ownership regulatory

"The reporting person disclaims beneficial ownership of these shares"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

indirect ownership financial

"An additional 210,100 shares are reported as indirectly owned"

FAQ

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

What insider transaction did MAIA (MAIA) report for Vlad Vitoc?

Vlad Vitoc reported purchasing 73,000 MAIA common shares on September 14, 2026 in an open-market or private transaction at $1.37 per share, according to the Form 4.

How many MAIA shares does Vlad Vitoc own directly after this Form 4?

After the reported purchase, Vlad Vitoc directly owns 1,049,121 shares of MAIA common stock, as stated in the Form 4’s post-transaction holdings column.

What indirect MAIA holdings are reported for Vlad Vitoc and in whose name?

The Form 4 reports 210,100 MAIA shares as indirectly owned and beneficially owned by Mr. Vitoc’s spouse. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest.

Was Vlad Vitoc’s MAIA stock purchase under a Rule 10b5-1 trading plan?

The Form 4 indicates no Rule 10b5-1 trading plan for the reported MAIA stock transactions; the document-level checkbox for such a plan is not marked as applicable.

What is Vlad Vitoc’s role at MAIA Biotechnology, Inc.?

Vlad Vitoc is reported as a director, an officer, and a ten percent owner of MAIA Biotechnology, Inc., with the officer title of Chief Executive Officer.

What was the price paid per share in the MAIA stock purchase?

The reported purchase price for MAIA common stock was $1.37 per share for the 73,000 shares acquired on September 14, 2026, with the price stated on a per-share basis.

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

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Vitoc Vlad

(Last) (First) (Middle)

444 WEST LAKE STREET,

(Street)

CHICAGO ILLINOIS 60606

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MAIA Biotechnology, Inc. [ MAIA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/14/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/14/2026		P		73,000	A	$1.37	1,049,121	D
Common Stock								210,100	I	See Footnote(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These securities are beneficially owned by Mr. Vitoc's spouse. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

	/s/ Vlad Vitoc	09/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)