STBA

SEC source: 0001127602-25-014511 · form4.xml · derivative · entry 2

GRUBE JEFFREY D · CIK 0001157911 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,573 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014511 · form4.xml · nonDerivative · entry 1

GRUBE JEFFREY D · CIK 0001157911 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,485

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-014536 · form4.xml · derivative · entry 3

Palermo Frank J Jr · CIK 0001568809 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,573 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014536 · form4.xml · nonDerivative · entry 1

Palermo Frank J Jr · CIK 0001568809 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,716.443

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-014533 · form4.xml · derivative · entry 3

Gurt Peter G · CIK 0002030229 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,290

Underlying: Common Stock · 1,290 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F4 · derivative.exercise_date: 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, a pre-selected date, or sooner upon the occurrence of certain events.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F4 · derivative.expiration_date: 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, a pre-selected date, or sooner upon the occurrence of certain events.

SEC source: 0001127602-25-014524 · form4.xml · derivative · entry 5

Barsz Peter Richard · CIK 0001732803 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,290

Underlying: Common Stock · 1,290 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F5 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F6 · derivative.exercise_date: 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, a pre-selected date, or sooner upon the occurrence of certain events.

F5 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F6 · derivative.expiration_date: 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, a pre-selected date, or sooner upon the occurrence of certain events.

SEC source: 0001127602-25-014520 · form4.xml · derivative · entry 3

HIEB WILLIAM J · CIK 0001252518 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,290

Underlying: Common Stock · 1,290 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014520 · form4.xml · derivative · entry 2

HIEB WILLIAM J · CIK 0001252518 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,573 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014520 · form4.xml · nonDerivative · entry 1

HIEB WILLIAM J · CIK 0001252518 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,343.347

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-014518 · form4.xml · derivative · entry 3

Adkins Lewis W Jr · CIK 0001783351 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,290

Underlying: Common Stock · 1,290 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014518 · form4.xml · derivative · entry 2

Adkins Lewis W Jr · CIK 0001783351 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,573 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014518 · form4.xml · nonDerivative · entry 1

Adkins Lewis W Jr · CIK 0001783351 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,705

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-014516 · form4.xml · derivative · entry 3

Cassotis Christina Anne · CIK 0001710652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,290

Underlying: Common Stock · 1,290 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014516 · form4.xml · derivative · entry 2

Cassotis Christina Anne · CIK 0001710652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,573 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014516 · form4.xml · nonDerivative · entry 1

Cassotis Christina Anne · CIK 0001710652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,280.3724

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-014514 · form4.xml · derivative · entry 4

DONNELLY MICHAEL J · CIK 0001157903 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,290

Underlying: Common Stock · 1,290 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014514 · form4.xml · derivative · entry 3

DONNELLY MICHAEL J · CIK 0001157903 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,573 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014514 · form4.xml · nonDerivative · entry 1

DONNELLY MICHAEL J · CIK 0001157903 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,084

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-014506 · form4.xml · derivative · entry 6

TORETTI CHRISTINE J · CIK 0001157934 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,290

Underlying: Common Stock · 1,290 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014506 · form4.xml · derivative · entry 5

TORETTI CHRISTINE J · CIK 0001157934 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,573 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014506 · form4.xml · nonDerivative · entry 1

TORETTI CHRISTINE J · CIK 0001157934 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,000.2296

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-014577 · form4.xml · derivative · entry 3

Ramachandran Bhaskar · CIK 0002008599 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,290

Underlying: Common Stock · 1,290 shares

Expires not disclosed

F4 · security: Filing delayed due to technical error with Director's updated CCC filing code.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014577 · form4.xml · derivative · entry 2

Ramachandran Bhaskar · CIK 0002008599 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,573 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

F3 · derivative.expiration_date: The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001127602-25-014577 · form4.xml · nonDerivative · entry 1

Ramachandran Bhaskar · CIK 0002008599 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,824

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-011970 · form4.xml · derivative · entry 5

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 510

Underlying: Common Stock · 495 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: On April 10, 2023, the Registrant awarded a special grant to the executive officer that will vest equally over the three successive anniversary dates of the grant date.

F3 · derivative.expiration_date: On April 10, 2023, the Registrant awarded a special grant to the executive officer that will vest equally over the three successive anniversary dates of the grant date.

SEC source: 0001127602-25-011970 · form4.xml · nonDerivative · entry 2

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,931.8418

F2 · kind: Shares of common stock withheld for payment of tax liability for vested and converted RSU's.

SEC source: 0001127602-25-011970 · form4.xml · nonDerivative · entry 1

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,074.8418

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-011604 · form4.xml · derivative · entry 16

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 523

Underlying: Common Stock · 506 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F10 · derivative.exercise_date: 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.

F10 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011604 · form4.xml · derivative · entry 15

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 532 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F9 · derivative.exercise_date: 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.

F9 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011604 · form4.xml · derivative · entry 14

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,685 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · derivative.exercise_price: 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.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F8 · derivative.exercise_date: 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.

F8 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011604 · form4.xml · derivative · entry 13

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,685

Underlying: Common Stock · 2,685 shares

Expires not disclosed

F7 · derivative.exercise_price: 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.

F8 · derivative.exercise_date: 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.

F8 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011604 · form4.xml · nonDerivative · entry 8

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,579.8418

SEC source: 0001127602-25-011604 · form4.xml · nonDerivative · entry 7

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,746.8418

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-25-011604 · form4.xml · nonDerivative · entry 6

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,197.8418

SEC source: 0001127602-25-011604 · form4.xml · nonDerivative · entry 5

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,370.8418

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-25-011604 · form4.xml · nonDerivative · entry 4

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,864.8418

SEC source: 0001127602-25-011604 · form4.xml · nonDerivative · entry 3

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,046.8418

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-011604 · form4.xml · nonDerivative · entry 2

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,514.8418

F2 · kind: Shares of common stock withheld for payment of tax liability for vested and converted RSU's.

SEC source: 0001127602-25-011604 · form4.xml · nonDerivative · entry 1

Lazzari Melanie A · CIK 0001658977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,428.8418

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

SEC source: 0001127602-25-011602 · form4.xml · derivative · entry 15

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,536

Underlying: Common Stock · 756 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · security: 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.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F8 · derivative.exercise_date: 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.

F8 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011602 · form4.xml · derivative · entry 14

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 738

Underlying: Common Stock · 714 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F6 · derivative.exercise_date: 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.

F6 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011602 · form4.xml · derivative · entry 13

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 710 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011602 · form4.xml · derivative · entry 12

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,585 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: 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.

F1 · kind: Upon vest, automatically converts into equal number of shares of common stock.

F3 · derivative.exercise_date: 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.

F3 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011602 · form4.xml · derivative · entry 11

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,585

Underlying: Common Stock · 3,585 shares

Expires not disclosed

F2 · derivative.exercise_price: 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.

F3 · derivative.exercise_date: 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.

F3 · derivative.expiration_date: 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.

SEC source: 0001127602-25-011602 · form4.xml · nonDerivative · entry 8

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,660.953

SEC source: 0001127602-25-011602 · form4.xml · nonDerivative · entry 7

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,991.953

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-25-011602 · form4.xml · nonDerivative · entry 6

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,235.953

SEC source: 0001127602-25-011602 · form4.xml · nonDerivative · entry 5

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,548.953

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-25-011602 · form4.xml · nonDerivative · entry 4

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,834.953

SEC source: 0001127602-25-011602 · form4.xml · nonDerivative · entry 3

Drahnak Stephen A. · CIK 0001538345 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,145.953

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.