X0306 4 2023-03-02 0001878313 MAIA Biotechnology, Inc. MAIA 0001913257 Vitoc Vlad 444 WEST LAKE STREET, CHICAGO IL 60606 1 1 1 Chief Executive Officer Common Stock 2023-03-02 4 P 0 45 4.42 A 795159 D Common Stock 2023-03-03 4 P 0 2398 4.47 A 797557 D Common Stock 210000 I See Footnote The purchases reported in this Form 4 were automatically effected pursuant to a previously executed purchasing plan for Mr. Vitoc that is intended to comply with Rule 10b5-1(c) promulgated under the Securities Exchange Act of 1934, as amended. The price reported is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $4.41 to $4.50, inclusive. The Reporting Person undertakes to provide to the staff of the Securities and Exchange Commission, to any security holder of the Issuer, or to the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above. The price reported is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $4.39 to $4.50, inclusive. The Reporting Person undertakes to provide to the staff of the Securities and Exchange Commission, to any security holder of the Issuer, or to the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above. 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 2023-03-06