Company: STBA
Filing Date: 2025-03-31
Form Type: DEF 14A
Source: 0001193125-25-068253
Chunk: 11

Company: S&T BANCORP INC
Filing Date: 2025-03-31
Form: DEF 14A
Chunk 11
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 that you received.

For our 2026 annual meeting, you can help us save significant printing and mailing expenses by consenting to access our proxy materials electronically via the Internet. If you hold your shares in your own name (instead of “street name” through a bank, broker or other nominee), you can choose this option by following the prompts for consenting to electronic access, if voting by telephone, or by following the instructions at the Internet voting website at www.proxyvote.com, which has been established for you to vote your shares for the 2025 Annual Meeting. If you choose to receive your proxy materials electronically, then prior to next year’s annual meeting, you will receive notification when the proxy materials are available for online review via the Internet, as well as the instructions for voting electronically via the Internet. Your choice for electronic distribution will remain in effect until you revoke it by sending a written request to S&T by mail to the attention of the Secretary of S&T at 800 Philadelphia Street, Indiana, Pennsylvania 15701. If you hold your shares in “street name” through a bank, broker or other nominee, you should follow the instructions provided by that entity if you wish to access our proxy materials electronically via the Internet.

4| S&T Bancorp, Inc.|2025 Proxy Statement

BENEFICIAL OWNERS OF S&T COMMON STOCK Under Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), a beneficial owner of a security is any person who directly or indirectly has or shares voting power or investment power over such security. Such beneficial owner under this definition need not enjoy the economic benefit of such securities. The following are the only shareholders known to S&T to be deemed to be a beneficial owner of 5% or more of Common Stock as of February 28, 2025, when 38,370,213 shares of Common Stock were outstanding. S&T has relied solely on information provided in the public filings made by the holders below:**

| Title of Class |     | Name and Address of Beneficial Owner                                           |     | Amount and Nature of 
 Beneficial Ownership |     | Percent of 
 Class      |
| Common Stock   |     | BlackRock, Inc. 50 Hudson Yards New York, NY 10001                             |     | 5,588,300(1)         |     | 14.56%     |
| Common Stock   |     | The Vanguard Group, Inc. 100 Vanguard Blvd. Malvern, PA