OLD SECOND BANCORP INC (OSBC) SEC Filings & Financial Intelligence
OLD SECOND BANCORP INC (OSBC) is a publicly traded company on the Nasdaq, categorized under SIC 6022 (State Commercial Banks). Access real-time SEC filings, 10-K annual reports, 10-Q quarterlies, 8-K current reports, PCAOB auditor history, and executive compensation disclosures.
Ticker: OSBC
CIK: 357173
Exchange: Nasdaq
SIC 6022: State Commercial Banks
Fiscal Year End: 12/31
State: DE
Independent PCAOB Auditor
Explore PCAOB Audit Intelligence →
Audit Firm
Plante & Moran, PLLC
Auditor SinceSince 12/31/2016 12:00:00 AM
Lead Engagement PartnerKyle Manny
Audit LocationChicago, Illinois, United States
Latest SEC EDGAR Filings
Showing 10-K, 10-Q, 8-K, Form 4, and other SEC submissions| Form | Filing Date | Reporting Period | Description | Accession Number | Actions |
|---|---|---|---|---|---|
| 10-Q | 2026-11-04 | 2026-09-30 | 10-Q | 0000357173-26-000060 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-10-30 | — | SCHEDULE 13G Filing | 0002100119-26-001679 | View SEC Doc Filr Page |
| 4 | 2026-10-21 | 2021-05-11 | 4 Filing | 0001244438-26-000006 | View SEC Doc Filr Page |
| 8-K | 2026-10-21 | 2026-10-21 | 8-K | 0000357173-26-000057 | View SEC Doc Filr Page |
| 4/A | 2026-10-21 | 2026-02-21 | 4/A Filing | 0001244438-26-000004 | View SEC Doc Filr Page |
| 4/A | 2026-10-21 | 2026-02-21 | 4/A Filing | 0001895832-26-000004 | View SEC Doc Filr Page |
| 4/A | 2026-10-20 | 2026-02-21 | 4/A Filing | 0001655300-26-000004 | View SEC Doc Filr Page |
| 4/A | 2026-10-20 | 2026-02-21 | 4/A Filing | 0001184764-26-000010 | View SEC Doc Filr Page |
| 4/A | 2026-10-20 | 2026-02-21 | 4/A Filing | 0001829064-26-000010 | View SEC Doc Filr Page |
| 4/A | 2026-10-20 | 2026-02-21 | 4/A Filing | 0001896747-26-000004 | View SEC Doc Filr Page |
| 4/A | 2026-10-20 | 2026-02-21 | 4/A Filing | 0001225765-26-000003 | View SEC Doc Filr Page |
| 4/A | 2026-10-20 | 2026-02-21 | 4/A Filing | 0001296986-26-000004 | View SEC Doc Filr Page |
| 8-K | 2026-10-20 | 2026-10-20 | 8-K | 0000357173-26-000055 | View SEC Doc Filr Page |
| 4/A | 2026-10-20 | 2026-02-21 | 4/A Filing | 0001191044-26-000004 | View SEC Doc Filr Page |
| 8-K | 2026-10-19 | 2026-10-14 | 8-K | 0000357173-26-000052 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-10-08 | — | SCHEDULE 13G Filing | 0000354204-26-001084 | View SEC Doc Filr Page |
| 4 | 2026-10-01 | 2026-09-30 | 4 Filing | 0001314109-26-000016 | View SEC Doc Filr Page |
| 4 | 2026-10-01 | 2026-09-30 | 4 Filing | 0001598917-26-000012 | View SEC Doc Filr Page |
| 4 | 2026-10-01 | 2026-09-30 | 4 Filing | 0001840027-26-000014 | View SEC Doc Filr Page |
| 4 | 2026-10-01 | 2026-09-30 | 4 Filing | 0001673321-26-000014 | View SEC Doc Filr Page |
| 4 | 2026-10-01 | 2026-09-30 | 4 Filing | 0001184766-26-000024 | View SEC Doc Filr Page |
| 8-K | 2026-10-01 | 2026-10-01 | 8-K | 0000357173-26-000050 | View SEC Doc Filr Page |
| 4 | 2026-09-23 | 2026-09-23 | 4 Filing | 0001184766-26-000022 | View SEC Doc Filr Page |
| 144 | 2026-09-23 | — | 144 Filing | 0001949846-26-000595 | View SEC Doc Filr Page |
| 4 | 2026-09-11 | 2026-09-04 | 4 Filing | 0001184766-26-000020 | View SEC Doc Filr Page |