Company: OSBC
Filing Date: 2025-04-01
Form Type: PRE 14A
Source: 0001558370-25-004277
Chunk: 17

Company: OLD SECOND BANCORP INC
Filing Date: 2025-04-01
Form: PRE 14A
Chunk 17
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                   |
| Billy J. Lyons, Jr. | ​ | M     | ​ | ​            | ​ | ​                                 | ​ | M     | ​ | M                                   | ​ | C                   |
| Hugh McLean         | ​ | M     | ​ | C            | ​ | M                                 | ​ | M     | ​ | ​                                   | ​ | ​                   |
| Patti Temple Rocks  | ​ | ​     | ​ | ​            | ​ | C                                 | ​ | ​     | ​ | ​                                   | ​ | M                   |
| John Williams, Jr.  | ​ | ​     | ​ | ​            | ​ | ​                                 | ​ | ​     | ​ | ​                                   | ​ | M                   |
| Jill York           | ​ | C     | ​ | M            | ​ | M                                 | ​ | ​     | ​ | ​                                   | ​ | M                   |

*Bank-level committee.

11

Audit Committee The Audit Committee assists the board in carrying out its oversight responsibilities for our financial reporting process, audit process and internal controls. The Audit Committee is solely responsible for the pre-approval of all required audit and non-audit services to be provided by our independent registered public accounting firm and exercises its authority to do so in accordance with a policy that it has adopted. The committee’s duties, responsibilities and functions are further described in its charter, which is available on our website at www.oldsecond.com, in the “Governance Documents” section under “Investor Relations.” You can request a copy of the committee’s charter by sending a written request to the Corporate Secretary at 37 South River Street, Aurora, Illinois 60507, or by sending a request via e-mail to corporatesecretary@oldsecond.com. The members of our Audit Committee during 2024 were Ms. York (who serves as Chair), Mr. Finn, Mr. Klaeser, Mr. Ladowicz, Mr. Lyons, and Mr. McLean. The board determined that each member of the committee was an independent director under SEC Rule 10A-3 and NASDAQ’s listing requirements. The Audit Committee met four times in 2024. The board has designated each of Mr. Finn, Mr. Klaeser, and Ms. York as an “audit committee financial expert,” as such term is defined by the regulations of the SEC. The board believes that each of the other members of the Audit Committee possesses knowledge and experience sufficient to understand the complexities of our financial statements