Old Second Bancorp, Inc. OSBC

Company Overview

Old Second Bancorp, Inc. is a bank holding company headquartered in Aurora, Illinois, operating primarily through its wholly owned banking subsidiary, Old Second National Bank. The company operates in the U.S. regional banking industry and provides commercial banking, retail banking, treasury management, wealth management, and lending services. Its primary revenue drivers are net interest income generated from commercial and consumer lending activities, along with fee-based income from deposit services, trust operations, and wealth management offerings. The bank primarily serves small- to mid-sized businesses, commercial real estate clients, municipalities, and individual consumers across the Chicago metropolitan area and surrounding Midwestern markets.

The company traces its origins to 1871 with the founding of Old Second National Bank. Over time, it evolved from a community-focused bank into a broader regional banking institution through branch expansion and acquisitions. A major step in its growth strategy occurred with the acquisition of West Suburban Bancorp, Inc. in 2016, which significantly expanded its market presence in the greater Chicago area. Old Second Bancorp has positioned itself as a relationship-focused commercial bank with strong local market penetration, emphasizing conservative credit practices, community banking relationships, and middle-market commercial lending expertise.