OLD SECOND BANCORP Business Summary

Old Second Bancorp Inc. (OSBC) operates as the bank holding company for Old Second National Bank, primarily generating revenue through net interest income derived from a diverse portfolio of commercial, real estate, and consumer loans funded by a stable retail deposit base. Its business is structured around its core Community Banking segment, which is supplemented by high-margin non-interest income streams including wealth management, mortgage loan sales, and national specialty lending through its FreedomRoad Financial and Performance Finance divisions. As of February 2026, the company maintains a dominant community banking presence in the Chicago metropolitan area, characterized by a robust net interest margin of approximately 5.1% and a disciplined focus on operational efficiency. OSBC competes directly with regional mid-cap peers such as First Busey Corp (BUSE), Byline Bancorp Inc. (BY), and First Commonwealth Financial (FCF), positioning itself as a high-performing, relationship-driven alternative with a strong capital position recently reinforced by a $43.9 million share repurchase program. Established in 1871 in Aurora, Illinois, the institution is currently led by Chairman, President, and CEO James L. Eccher, a veteran executive with over 25 years of experience at the bank who has overseen significant asset growth and strategic acquisitions since 2015. The executive suite includes Bradley S. Adams, who serves as Executive Vice President, Chief Operating Officer, and Chief Financial Officer, bringing a pedigree in corporate development and financial strategy since joining in 2017. Vice Chairman Gary S. Collins provides deep industry expertise from his former leadership roles at Talmer Bancorp and The PrivateBank. The company’s governance is supported by a seasoned Board of Directors, including Lead Independent Director Barry Finn, former CEO of Rush-Copley Medical Center, and Dennis Klaeser, a veteran bank analyst and former CFO of TCF Financial. This leadership team has successfully pivoted the bank toward a more diversified lending model, integrating specialty finance units to drive long-term shareholder value.