Company Analysis

Old Second Bancorp, Inc. (OSBC)

Nasdaq: OSBC · State Commercial Banks · Aurora, IL · filing with the SEC since 1995
Grade5.0
◀ Past 5.4● Present 4.9▶ Future 4.6

Filings

333 filings since 2017 beside 607 insider forms · Large accelerated filer · read from EDGAR on Nov 13, 2026
Due nextLarge accelerated filer
10-K Annual report for the fiscal year ending Dec 31, 2026Large accelerated filers have 60 days after the fiscal year ends. by Mar 1, 2027
10-Q Quarterly report for the quarter ending Mar 31, 2027Large accelerated filers have 40 days after the quarter ends; quarter ends are taken to the month end. by May 10, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 21 days after the quarter ended. The proxy statement was last filed Apr 6, 2026.

Filings a yearinsider forms included
718112584907789107
20192020202120222023202420252026

2026 counts to Nov 13, 2026.

Officer or director change (8-K item 5.02): 6 times in the last 36 months, the newest Oct 19, 2026.SEC letters: 2 in the last 36 months, the newest May 6, 2025.
Insider forms 607

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Nov 4, 2026 10-Q Quarterly report Sep 30, 2026
Oct 30, 2026 SCHEDULE 13G Large holder notice
Oct 21, 2026 8-K items 2.02, 9.01 Results released · Current report
Oct 20, 2026 8-K item 8.01 Other event · Current report
Oct 19, 2026 8-K item 5.02 Officer or director change · Current report Oct 14, 2026
Oct 8, 2026 SCHEDULE 13G Large holder notice
Oct 1, 2026 8-K item 8.01 Other event · Current report
Aug 18, 2026 S-3ASR Shelf registration
Aug 6, 2026 10-Q Quarterly report Jun 30, 2026
Jul 22, 2026 8-K items 2.02, 9.01 Results released · Current report
Jul 21, 2026 8-K item 8.01 Other event · Current report
Jul 8, 2026 8-K item 5.02 Officer or director change · Current report Jul 7, 2026
Jul 1, 2026 8-K item 8.01 Other event · Current report
Jun 29, 2026 11-K Employee plan annual report Dec 31, 2025
Jun 25, 2026 8-K item 8.01 Other event · Current report
Jun 9, 2026 8-K item 5.02 Officer or director change · Current report Jun 5, 2026
May 20, 2026 8-K item 5.07 Shareholder vote · Current report May 19, 2026
May 19, 2026 8-K items 7.01, 9.01 Investor disclosure (Regulation FD) · Current report
May 7, 2026 10-Q Quarterly report Mar 31, 2026
Apr 22, 2026 8-K items 2.02, 9.01 Results released · Current report
Apr 21, 2026 8-K item 8.01 Other event · Current report
Apr 6, 2026 ARS Annual report to shareholders Dec 31, 2025
Apr 6, 2026 DEFA14A Extra proxy material
Apr 6, 2026 DEF 14A Proxy statement May 19, 2026
Apr 1, 2026 8-K item 8.01 Other event · Current report
Mar 27, 2026 SCHEDULE 13G/A Large holder update, amended
Mar 4, 2026 8-K item 8.01 Other event · Current report
Feb 26, 2026 10-K Annual report Dec 31, 2025
Jan 29, 2026 8-K item 8.01 Other event · Current report
Jan 21, 2026 8-K items 2.02, 9.01 Results released · Current report
Jan 20, 2026 8-K item 8.01 Other event · Current report
Jan 2, 2026 8-K item 8.01 Other event · Current report
Nov 6, 2025 10-Q Quarterly report Sep 30, 2025
Oct 22, 2025 8-K items 2.02, 9.01 Results released · Current report
Oct 21, 2025 8-K item 8.01 Other event · Current report
Oct 1, 2025 8-K item 8.01 Other event · Current report
Sep 17, 2025 8-K/A item 9.01 Financial statements and exhibits · Current report, amended Jul 1, 2025
Sep 15, 2025 8-K item 5.02 Officer or director change · Current report Sep 14, 2025
Aug 7, 2025 10-Q Quarterly report Jun 30, 2025
Jul 23, 2025 8-K items 2.02, 9.01 Results released · Current report
40 of 333 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton OSBC · research, not advice