Old Second Bancorp Inc
OSBC- Exchange
- Nasdaq
- Industry
- State Commercial Banks
- SEC CIK
- 0000357173
In the last 90 days, Old Second Bancorp Inc insiders filed 1 open-market purchase and 5 sales; 184 institutions reported holding it in 13F filings for Q2 2026, worth $903.3M in total; no superinvestor holds it.
SEC filings
10-K, 10-Q, 8-K, 20-F and 40-F reports Old Second Bancorp Inc filed with the SEC, newest first.
Livermore lists each filing's form, 8-K items and dates only. To read a filing, open it on SEC.gov; an 8-K's press release or other attachments, such as exhibit 99.1 for Item 2.02, are in the filing index.
| Filed | Form | 8-K items | Period | Document | Filing index |
|---|---|---|---|---|---|
| Nov 4, 2026 | 10-Q | – | Sep 30, 2026 | SEC | Index |
| Oct 21, 2026 | 8-K | 2.029.01 | Oct 21, 2026 | SEC | Index |
| Oct 20, 2026 | 8-K | 8.01 | Oct 20, 2026 | SEC | Index |
| Oct 19, 2026 | 8-K | 5.02 | Oct 14, 2026 | SEC | Index |
| Oct 1, 2026 | 8-K | 8.01 | Oct 1, 2026 | SEC | Index |
| Aug 6, 2026 | 10-Q | – | Jun 30, 2026 | SEC | Index |
| Jul 22, 2026 | 8-K | 2.029.01 | Jul 22, 2026 | SEC | Index |
| Jul 21, 2026 | 8-K | 8.01 | Jul 21, 2026 | SEC | Index |
| Jul 8, 2026 | 8-K | 5.02 | Jul 7, 2026 | SEC | Index |
| Jul 1, 2026 | 8-K | 8.01 | Jul 1, 2026 | SEC | Index |
| Jun 25, 2026 | 8-K | 8.01 | Jun 25, 2026 | SEC | Index |
| Jun 9, 2026 | 8-K | 5.02 | Jun 5, 2026 | SEC | Index |
| May 20, 2026 | 8-K | 5.07 | May 19, 2026 | SEC | Index |
| May 19, 2026 | 8-K | 7.019.01 | May 19, 2026 | SEC | Index |
| May 7, 2026 | 10-Q | – | Mar 31, 2026 | SEC | Index |
| Apr 22, 2026 | 8-K | 2.029.01 | Apr 22, 2026 | SEC | Index |
| Apr 21, 2026 | 8-K | 8.01 | Apr 21, 2026 | SEC | Index |
| Apr 1, 2026 | 8-K | 8.01 | Apr 1, 2026 | SEC | Index |
| Mar 4, 2026 | 8-K | 8.01 | Mar 4, 2026 | SEC | Index |
| Feb 26, 2026 | 10-K | – | Dec 31, 2025 | SEC | Index |
| Jan 29, 2026 | 8-K | 8.01 | Jan 29, 2026 | SEC | Index |
| Jan 21, 2026 | 8-K | 2.029.01 | Jan 21, 2026 | SEC | Index |
| Jan 20, 2026 | 8-K | 8.01 | Jan 20, 2026 | SEC | Index |
| Jan 2, 2026 | 8-K | 8.01 | Jan 2, 2026 | SEC | Index |
| Nov 6, 2025 | 10-Q | – | Sep 30, 2025 | SEC | Index |
| Oct 22, 2025 | 8-K | 2.029.01 | Oct 22, 2025 | SEC | Index |
| Oct 21, 2025 | 8-K | 8.01 | Oct 21, 2025 | SEC | Index |
| Oct 1, 2025 | 8-K | 8.01 | Oct 1, 2025 | SEC | Index |
| Sep 17, 2025 | 8-K/A | 9.01 | Jul 1, 2025 | SEC | Index |
| Sep 15, 2025 | 8-K | 5.02 | Sep 14, 2025 | SEC | Index |
| Aug 7, 2025 | 10-Q | – | Jun 30, 2025 | SEC | Index |
| Jul 23, 2025 | 8-K | 2.029.01 | Jul 23, 2025 | SEC | Index |
| Jul 15, 2025 | 8-K | 8.01 | Jul 15, 2025 | SEC | Index |
| Jul 2, 2025 | 8-K | 8.01 | Jul 2, 2025 | SEC | Index |
| Jul 1, 2025 | 8-K | 2.015.028.019.01 | Jul 1, 2025 | SEC | Index |
| Jun 18, 2025 | 8-K | 7.01 | Jun 18, 2025 | SEC | Index |
| Jun 3, 2025 | 8-K/A | 5.07 | May 20, 2025 | SEC | Index |
| May 28, 2025 | 8-K | 5.039.01 | May 23, 2025 | SEC | Index |
| May 22, 2025 | 8-K | 8.019.01 | May 22, 2025 | SEC | Index |
| May 20, 2025 | 8-K | 5.07 | May 20, 2025 | SEC | Index |
| May 20, 2025 | 8-K | 7.019.01 | May 20, 2025 | SEC | Index |
| May 9, 2025 | 10-Q | – | Mar 31, 2025 | SEC | Index |
| Apr 23, 2025 | 8-K | 2.029.01 | Apr 23, 2025 | SEC | Index |
| Apr 15, 2025 | 8-K | 8.01 | Apr 15, 2025 | SEC | Index |
| Apr 1, 2025 | 8-K | 8.01 | Apr 1, 2025 | SEC | Index |
| Mar 6, 2025 | 10-K | – | Dec 31, 2024 | SEC | Index |
| Feb 25, 2025 | 8-K | 1.018.019.01 | Feb 24, 2025 | SEC | Index |
| Jan 22, 2025 | 8-K | 2.029.01 | Jan 22, 2025 | SEC | Index |
| Jan 21, 2025 | 8-K | 8.01 | Jan 21, 2025 | SEC | Index |
| Jan 2, 2025 | 8-K | 8.01 | Jan 2, 2025 | SEC | Index |