OLD SECOND BANCORP INC
Old Second Bancorp, Inc. (NASDAQ: OSBC) operates as a bank holding company providing comprehensive community banking and financial services through its wholly-owned subsidiary, Old Second National Bank. The company maintains its principal executive offices at 37 South River Street, Aurora, Illinois, and operates its… From the company’s description.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What OLD SECOND BANCORP INC does
In the company’s own words
Old Second Bancorp, Inc. (NASDAQ: OSBC) operates as a bank holding company providing comprehensive community banking and financial services through its wholly-owned subsidiary, Old Second National Bank. The company maintains its principal executive offices at 37 South River Street, Aurora, Illinois, and operates its website at www.oldsecond.com.
The company delivers a full range of deposit products, lending services, trust and wealth management offerings, and electronic banking solutions to retail, commercial, industrial, and public entity customers across its primary market area in northeastern Illinois and contiguous states. Old Second operates 55 banking centers located in Cook, DeKalb, DuPage, Kane, Kendall, LaSalle, and Will counties in Illinois, with additional loan production capabilities extending nationwide through specialized business lines.
The lending portfolio encompasses commercial real estate, residential real estate, general commercial loans, construction lending, equipment leases, consumer loans including powersport financing, and home equity lines of credit. As of December 31, 2025, the company's loan portfolio totaled approximately $5.2 billion, with commercial real estate representing 36.5 percent of total loans. The company originated approximately $1.36 billion in loans during 2025, excluding renewals, and originated $153.4 million in residential mortgage loans.
Deposit products include demand accounts, NOW accounts, money market accounts, savings accounts, and time deposits tailored to individual and business customers. The company provides wealth management services with approximately $2.29 billion in assets under administration and management as of December 31, 2025.
In July 2025, Old Second completed its acquisition of Bancorp Financial, Inc., which expanded the company's consumer lending portfolio and added nationwide retail business lines focused on powersport, collector car, and manufactured home lending. The acquisition added approximately $1.43 billion in total assets and $1.20 billion in loans to the company's portfolio.
As of December 31, 2025, the company employed 1,062 full-time equivalent employees. Old Second competes with regional and national banks, credit unions, finance companies, and financial technology providers in its market areas, emphasizing personal service, community relationships, and responsive client service as competitive advantages.
Company details
- Sector
- Financials
- Industry
- Banks & Brokers
- Headquarters
- AURORA, IL
- Fiscal year end
- December
- CIK
- 357173
- SIC
- 6022
Financial performance, year by year
Fiscal 2013–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns OLD SECOND BANCORP INC — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · OLD SECOND BANCORP INC’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
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