Company: OSBC
Filing Date: 2025-04-18
Form Type: DEF 14A
Source: 0001558370-25-005000
Chunk: 106

Company: OLD SECOND BANCORP INC
Filing Date: 2025-04-18
Form: DEF 14A
Chunk 106
---
. The committee has discussed with Plante & Moran, PLLC the matters required to be discussed by Auditing Standard No. 1301, Communications with Audit Committees, as adopted by the Public Company Accounting Oversight Board, and by SAS 114 (The Auditor’s Communication With Those Charged With Governance) and received and discussed the written disclosures and the letter from Plante & Moran, PLLC required by Public Company Accounting Oversight Board Rule 3526 (Communication with Audit Committees Concerning Independence). Based on the review and discussions with management and Plante & Moran, PLLC, the Audit Committee has recommended to the board that the audited financial statements be included in our annual report on Form 10-K for the fiscal year ending December 31, 2024, for filing with the SEC.

<div align='center'>Submitted by:

Ms. Jill York (Chair)

Mr. Barry Finn

Mr. Dennis Klaeser

Mr. John Ladowicz

Mr. Billy Lyons

Mr. Hugh McLean

Members of the Audit Committee

67</div>

### HOUSEHOLDING
The SEC has adopted rules that permit companies and intermediaries (e.g., brokers) to satisfy the delivery requirements for proxy statements and annual reports, or Notices Regarding the Availability of Proxy Materials, if applicable, with respect to two or more stockholders sharing the same address by delivering a single proxy statement and annual report, or Notice Regarding the Availability of Proxy Materials, if applicable, addressed to those stockholders. This process, which is commonly referred to as “householding,” potentially means extra convenience for stockholders and cost savings for companies. In accordance with these rules, only one proxy statement and annual report, or Notice Regarding the Availability of Proxy Materials, if applicable, may be delivered to multiple stockholders sharing an address unless we have received contrary instructions from one or more of the stockholders. Stockholders who currently receive multiple copies of the proxy statement and annual report at their address and would like to request “householding” of their communications should contact their broker if they are beneficial owners or direct their request to our Stockholder Relations Manager at the contact information below if they are registered holders.

If, at any time, you no longer wish to participate in “householding” and would prefer to receive a separate proxy statement and annual report, or Notice Regarding the Availability of Proxy Materials, if applicable, please notify your broker, if you are a beneficial owner or, if you are a registered holder, direct your written request to our Stockholder Relations Manager at