Old Second Bancorp Inc SEC filings OSBC
Old Second Bancorp Inc has 1,001 filings in SEC EDGAR's recent list, going back to Apr 1, 2016. Its latest annual report, Form ARS, was filed on Apr 6, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 21, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| DEFA14A | Additional proxy material | Apr 6, 2026 | — |
| DEF 14A | Proxy statement | Apr 6, 2026 | May 19, 2026 |
| DEF 14A | Proxy statement | Apr 18, 2025 | May 20, 2025 |
| PRE 14A | Preliminary proxy statement | Apr 1, 2025 | May 20, 2025 |
| DEF 14A | Proxy statement | Apr 19, 2024 | May 21, 2024 |
| DEF 14A | Proxy statement | Apr 14, 2023 | — |
| DEF 14A | Proxy statement | Apr 14, 2022 | Apr 14, 2022 |
| DEF 14A | Proxy statement | Apr 16, 2021 | May 18, 2021 |
| DEF 14A | Proxy statement | Jul 17, 2020 | Aug 18, 2020 |
| DEF 14A | Proxy statement | Apr 19, 2019 | May 21, 2019 |
| PRE 14A | Preliminary proxy statement | Mar 21, 2019 | May 21, 2019 |
| DEF 14A | Proxy statement | Apr 13, 2018 | May 15, 2018 |
| DEF 14A | Proxy statement | Apr 14, 2017 | May 16, 2017 |
| DEF 14A | Proxy statement | Apr 12, 2016 | May 17, 2016 |
Showing 14 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- State Commercial Banks (SIC 6022)
- Listed as
- OSBC (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Aurora, IL
- SEC filer status
- Large accelerated filer
- SEC CIK
- 357173
Other State Commercial Banks companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.