Sec Form 4/A Filing - Drahnak Stephen A. @ S&T BANCORP INC - 2025-04-01

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

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Drahnak Stephen A. 2. Issuer Name and Ticker or Trading Symbol S&T BANCORP INC [ STBA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Executive Vice President (Last) (First) (Middle) 800 PHILADELPHIA STREET 3. Date of Earliest Transaction (MM/DD/YY) 04/01/2025 (Street) INDIANA, PA15701 4. If Amendment, Date Original Filed (MM/DD/YY) 04/03/2025 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 04/01/2025 M( 1 ) 3,585 A $ 37.15 15,004.953 D Common Stock 04/01/2025 F( 2 ) 1,569 D $ 37.15 13,435.953 D Common Stock 04/01/2025 M( 1 ) 710 A $ 37.15 14,145.953 D Common Stock 04/01/2025 F( 2 ) 311 D $ 37.15 13,834.953 D Common Stock 04/01/2025 M( 1 ) 714 A $ 37.15 14,548.953 D Common Stock 04/01/2025 F( 2 ) 313 D $ 37.15 14,235.953 D Common Stock 04/01/2025 M( 1 ) 756 A $ 37.15 14,991.953 D Common Stock 04/01/2025 F( 2 ) 331 D $ 37.15 14,660.953 D Common Stock 8,021.4882 I 401-k Common Stock ( 3 ) 293 I Child
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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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 Restricted Stock Units ( 4 ) 04/01/2025 A 3,585 ( 5 ) ( 5 ) Common Stock 3,585 $ 0 3,585 D Restricted Stock Units ( 4 ) 04/01/2025 M( 1 ) 3,585 ( 5 ) ( 5 ) Common Stock 3,585 $ 0 0 D Restricted Stock Units ( 6 ) 04/01/2025 M( 1 ) 710 ( 7 ) ( 7 ) Common Stock 710 $ 0 0 D Restricted Stock Units ( 6 ) 04/01/2025 M( 1 ) 714 ( 8 ) ( 8 ) Common Stock 714 $ 0 738 D Restricted Stock Units ( 9 ) ( 6 ) 04/01/2025 M( 1 ) 756 ( 10 ) ( 11 ) Common Stock 756 $ 0 1,536 D Restricted Stock Units ( 12 ) ( 6 ) 04/01/2025 A 1,947 ( 13 ) ( 13 ) Common Stock 1,947 $ 0 1,947 D
Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Drahnak Stephen A. 800 PHILADELPHIA STREET INDIANA, PA15701 Executive Vice President	Signatures /s/ Susan L. Rager-Parr, attorney-in-fact for Stephen A. Drahnak 04/04/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Upon vest, automatically converts into equal number of shares of common stock. ( 2 )Shares of common stock withheld for payment of tax liability for vested and converted RSU's. ( 3 )The number of shares initially reported was incorrect. The correct number of S&T Bancorp. shares owned by the child on 1/1/2012 was 293. ( 4 )Acquired upon achievement of certain performance criteria pursuant to the performance-based restricted stock units granted April 1, 2022, under the Issuer's 2022 Long Term Incentive Plan. The performance period for the restricted stock units was January 1, 2022, until December 31, 2024, with achievement of the applicable performance criteria subject to determination by the Issuer's Compensation Committee. This determination was obtained on March 25, 2025. ( 5 )The restricted performance units awarded on April 1, 2022 vesting on April 1, 2025. Vested shares will be delivered to the reporting person upon vesting. ( 6 )Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock. ( 7 )The restricted stock units vest in three equal annual installments beginning April 1, 2023. Vested shares will be delivered to the reporting person upon vesting. ( 8 )The restricted stock units vest in three equal annual installments beginning April 1, 2024. Vested shares will be delivered to the reporting person upon vesting. ( 9 )Correction to the name of the award. It is not a Director's award, but officer award. All other aspects of the award, including date of award, number of shares, and vesting remain unchanged. ( 10 )The restricted stock units vest in three equal annual installments beginning April 1, 2025. Vested shares will be delivered to the reporting person upon vesting. ( 11 )The restricted stock units vest in three equal annual installments beginning April 1, 2025. In accordance with a pre-established deferral election made by the reporting person, vested shares will be delivered to the reporting person upon separation from service or sooner upon the occurrence of certain events. ( 12 )Filing delay due by April 3, 2025, caused by software unable to attach footnotes to awards. ( 13 )The restricted stock units vest in three equal annual installments beginning April 1, 2026. Vested shares will be delivered to the reporting person upon vesting.

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).

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