Company: STBA
Filing Date: 2025-06-23
Form Type: 11-K
Source: 0000719220-25-000040
Chunk: 2

Company: S&T BANCORP INC
Filing Date: 2025-06-23
Form: 11-K
Chunk 2
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 Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information is fairly stated, in all material respects, in relation to the financial statements as a whole.

We have served as the Plan’s auditor since 2005.

<div align='center'>2

Thrift Plan for Employees of S&T Bank

Statements of Net Assets Available for Benefits</div>

| Assets:                           
 Investments:                      |     | December 31 
 2024        |             |     | 2023 |             |
|:----------------------------------|:----|:------------|------------:|:----|:-----|------------:|
| Money market  fund                |     | $           |   7,491,492 |     | $    |   7,578,817 |
| Mutual funds                      |     |             | 107,035,758 |     |      |  95,137,707 |
| S&T Bancorp, Inc. common stock    |     |             |  13,827,385 |     |      |  13,597,144 |
| Total investments                 |     |             | 128,354,635 |     |      | 116,313,668 |
| Total Assets                      |     |             | 128,354,635 |     |      | 116,313,668 |
| Net assets available for benefits |     | $           | 128,354,635 |     | $    | 116,313,668 |

See accompanying notes to the financial statements.

<div align='center'>3

Thrift Plan for Employees of S&T Bank

Statements of Changes in Net Assets Available for Benefits</div>

| Additions                                              
 Contributions:                                         |     | Years Ended December 31 
 2024                    |             |     | 2023 |             |
|:-------------------------------------------------------|:----|:------------------------|------------:|:----|:-----|------------:|
| Employer                                               |     | $                       |   2,647,471 |     | $    |   2,625,256 |
| Employee-payroll                                       |     |                         |   7,733,763 |     |      |   7,509,016 |
| Employee-rollover                                      |     |                         |   1,071,572 |     |      |     673,255 |
|                                                        |     |                         |  11,452,806 |     |