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OLD SECOND BANCORP INC — 10-K Filings

28 10-K filings on record

This page lists all 10-K filings submitted to the SEC by OLD SECOND BANCORP INC (OSBC), sorted by most recent first. Each row links to the full filing on EdgarLookup. OLD SECOND BANCORP INC has filed 28 10-K documents with the SEC since 2015. To view all SEC filings by OLD SECOND BANCORP INC, see the full filings list.

Overview All Filings Financials Insiders
All 10-K 10-K/A 10-K405 10-Q 10-Q/A 11-K 144 144/A 15-12G 25-NSE 3 4 4/A 424B1 424B2 424B3 424B4 424B5 425 5 8-A12G 8-A12G/A 8-K 8-K/A ARS CORRESP D DEF 14A DEFA14A EFFECT FWP NT 11-K PRE 14A S-1 S-1/A S-3 S-3/A S-4 S-4/A S-8 SC 13D SC 13G SC 13G/A SC TO-I SC TO-I/A SCHEDULE 13G/A UPLOAD
Form Description Accession Number Filed Period
10-K 10-K 0001104659-26-020393 Feb 26, 2026 Dec 31, 2025
10-K 10-K 0001558370-25-002383 Mar 6, 2025 Dec 31, 2024
10-K 10-K 0001558370-24-002688 Mar 7, 2024 Dec 31, 2023
10-K 10-K 0001558370-23-003286 Mar 9, 2023 Dec 31, 2022
10-K 10-K 0001558370-22-003314 Mar 10, 2022 Dec 31, 2021
10-K 10-K 0000357173-21-000014 Mar 8, 2021 Dec 31, 2020
10-K 10-K 0000357173-20-000013 Mar 6, 2020 Dec 31, 2019
10-K 10-K 0000357173-19-000012 Mar 7, 2019 Dec 31, 2018
10-K 10-K 0000357173-18-000015 Mar 13, 2018 Dec 31, 2017
10-K 10-K 0000357173-17-000012 Mar 13, 2017 Dec 31, 2016
10-K 10-K 0000357173-16-000077 Mar 11, 2016 Dec 31, 2015
10-K 10-K 0000357173-15-000010 Mar 12, 2015 Dec 31, 2014
10-K 10-K 0001104659-14-013651 Feb 26, 2014 Dec 31, 2013
10-K 10-K 0001104659-13-022536 Mar 20, 2013 Dec 31, 2012
10-K 10-K 0001104659-12-018477 Mar 15, 2012 Dec 31, 2011
10-K 10-K 0001104659-11-014817 Mar 16, 2011 Dec 31, 2010
10-K 10-K 0001104659-10-014643 Mar 16, 2010 Dec 31, 2009
10-K 10-K 0001104659-09-017932 Mar 16, 2009 Dec 31, 2008
10-K 10-K 0001104659-08-017825 Mar 17, 2008 Dec 31, 2007
10-K 10-K 0001104659-07-019624 Mar 15, 2007 Dec 31, 2006
10-K ANNUAL REPORT PURSUANT TO SECTION 13 AND 15(D) 0001104659-06-016546 Mar 14, 2006 Dec 31, 2005
10-K 10-K 0001104659-05-011136 Mar 15, 2005 Dec 31, 2004
10-K 10-K 0001104659-04-007191 Mar 12, 2004 Dec 31, 2003
10-K 10-K 0001104659-03-004710 Mar 21, 2003 Dec 31, 2002
10-K — 0000357173-99-000014 Mar 31, 1999 Dec 31, 1998
10-K — 0000357173-98-000005 Mar 30, 1998 Dec 31, 1997
10-K — 0000357173-97-000004 Mar 31, 1997 Dec 31, 1996
10-K — 0000357173-96-000008 Mar 22, 1996 Dec 31, 1995