Effective July 12, 2023, William Skoglund, a member of the Board of Directors of Old Second Bancorp, Inc. resigned from the Board. Mr. Skoglund submitted his resignation in accordance with the Company’s Director Resignation Policy, which requires that any person serving as a director submit his or her resignation as a director upon attaining the age of 73 during his or her tenure. As such, Mr. Skoglund’s resignation is not the result of any disagreement with the Company.

Mr. Skoglund served as the Board’s Chairman through 2022, and also was the Chief Executive Officer of the Company from 1998 until 2014.