Company: STBA
Filing Date: 2025-03-31
Form Type: DEF 14A
Source: 0001193125-25-068253
Chunk: 18

Company: S&T BANCORP INC
Filing Date: 2025-03-31
Form: DEF 14A
Chunk 18
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 has demonstrated that she is a strong, decisive, and strategic leader. Her ability to identify the complex relationship between organizations and the competitive environments in which they operate has allowed her to position her business interests for the future while paying attention to immediate demands. Her substantial leadership roles within a highly-regulated, high-stakes industry provide valuable risk oversight experience, including with respect to cyber and technology, to the S&T Board. She is an innovative leader who has successfully directed necessary change through organizations to drive growth and deliver value which qualifies her to serve on the S&T Board.

| Michael J. Donnelly, Age 67 |     |                                                                                                                   |
| Director since 2001         |     | Committees: • Compensation & Benefits • Credit Risk • Executive • Nominating & Corporate Governance (Chairperson) |

Biographical Information Mr. Donnelly has been president of Indiana Printing and Publishing Company, Inc. since 1993. Mr. Donnelly has spent over 30 years working with the Indiana County Chamber of Commerce and the Indiana County Development Corporation in retaining and attracting many businesses in the Indiana, Pennsylvania area. Experience and Qualifications Mr. Donnelly’s deep experience in leading, managing and operating a local business provides the S&T Board with valuable insight into the issues addressing our local corporate and consumer borrowers. Mr. Donnelly’s experience in leading a business, related governance, and developing appropriate compensation for the executives and senior management of his company qualifies him to serve on the S&T Board. 10| S&T Bancorp, Inc.| 2025 Proxy Statement

Proposal 1: Election of Directors

| Jeffrey D. Grube, Age 71 |     |                                                                                              |
| Director since 1997      |     | Committees: • Audit • Compensation & Benefits • Credit Risk (Chairperson) • Executive • Risk |

Biographical Information Mr. Grube served as president of B.F.G. Manufacturing Service, Inc., which provides large volume plating, painting and powder coating services with facilities in Pennsylvania and New York from 1990 until his retirement in 2020. Mr. Grube’s career as an executive in the manufacturing industry includes financial and engineering experience. Mr. Grube also served as a director on the board of a privately held company that supplies compliance products for lending solutions. Experience and Qualifications Mr. Grube’s extensive experience working with small and medium-sizedbusinesses provides the S&T Board with valuable experience regarding