Company · CIK 357173 # OLD SECOND BANCORP INC | CIK | [357173](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000357173) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 6022 — State Commercial Banks | | Incorporated in | DE | | Business address | IL | | Listed | OSBC (Nasdaq) | | First annual or quarterly report | 1995-08-15 | ## Offerings 9 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-298416 | Shelf Effective | 2026-08-18 | 2026-08-18 | 1 | | 333-274068 | Shelf Effective | 2023-08-18 | 2023-08-28 | 2 | | 333-243746 | Shelf Effective | 2020-08-10 | 2020-08-20 | 2 | | 333-219680 | Shelf Effective | 2017-08-03 | 2017-08-11 | 2 | | 333-214459 | Shelf Effective | 2016-11-04 | 2016-12-13 | 4 | | 333-193424 | Registered company Final prospectus | 2014-01-17 | 2014-04-04 | 6 | | 333-166806 | Shelf Effective | 2010-05-13 | 2010-05-26 | 2 | | 333-158715 | Shelf Dormant | 2009-04-23 | 2009-04-23 | 1 | | 333-105421 | Shelf Final prospectus | 2003-05-20 | 2003-06-26 | 2 | ## Filings 25 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-08-18 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/357173/000035717326000048/0000357173-26-000048-index.htm) Shelf registered | 333-298416 | 0000357173-26-000048 | | 2025-05-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999525001469/9999999995-25-001469-index.htm) Declared effective | 333-286687 | 9999999995-25-001469 | | 2023-08-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999523002517/9999999995-23-002517-index.htm) Declared effective | 333-274068 | 9999999995-23-002517 | | 2023-08-18 | [S-3](https://www.sec.gov/Archives/edgar/data/357173/000035717323000059/0000357173-23-000059-index.htm) Shelf registered | 333-274068 | 0000357173-23-000059 | | 2021-10-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999521003985/9999999995-21-003985-index.htm) Declared effective | 333-259964 | 9999999995-21-003985 | | 2020-08-20 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999520002216/9999999995-20-002216-index.htm) Declared effective | 333-243746 | 9999999995-20-002216 | | 2020-08-10 | [S-3](https://www.sec.gov/Archives/edgar/data/357173/000155837020010230/0001558370-20-010230-index.htm) Shelf registered | 333-243746 | 0001558370-20-010230 | | 2017-08-11 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999517002105/9999999995-17-002105-index.htm) Declared effective | 333-219680 | 9999999995-17-002105 | | 2017-08-03 | [S-3](https://www.sec.gov/Archives/edgar/data/357173/000104746917004979/0001047469-17-004979-index.htm) Shelf registered | 333-219680 | 0001047469-17-004979 | | 2016-12-13 | [424B5](https://www.sec.gov/Archives/edgar/data/357173/000104746916017180/0001047469-16-017180-index.htm) Shelf takedown | 333-214459 | 0001047469-16-017180 | | 2016-12-12 | [424B5](https://www.sec.gov/Archives/edgar/data/357173/000104746916017140/0001047469-16-017140-index.htm) Shelf takedown | 333-214459 | 0001047469-16-017140 | | 2016-12-02 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999516006368/9999999995-16-006368-index.htm) Declared effective | 333-214459 | 9999999995-16-006368 | | 2016-11-04 | [S-3](https://www.sec.gov/Archives/edgar/data/357173/000104746916016541/0001047469-16-016541-index.htm) Shelf registered | 333-214459 | 0001047469-16-016541 | | 2014-04-04 | [424B4](https://www.sec.gov/Archives/edgar/data/357173/000104746914003395/0001047469-14-003395-index.htm) Final prospectus | 333-193424 | 0001047469-14-003395 | | 2014-04-03 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999514000866/9999999995-14-000866-index.htm) Declared effective | 333-193424 | 9999999995-14-000866 | | 2014-04-01 | [S-1/A](https://www.sec.gov/Archives/edgar/data/357173/000104746914003305/0001047469-14-003305-index.htm) Amendment | 333-193424 | 0001047469-14-003305 | | 2014-03-26 | [S-1/A](https://www.sec.gov/Archives/edgar/data/357173/000104746914003015/0001047469-14-003015-index.htm) Amendment | 333-193424 | 0001047469-14-003015 | | 2014-02-27 | [S-1/A](https://www.sec.gov/Archives/edgar/data/357173/000104746914001493/0001047469-14-001493-index.htm) Amendment | 333-193424 | 0001047469-14-001493 | | 2014-01-17 | [S-1](https://www.sec.gov/Archives/edgar/data/357173/000104746914000220/0001047469-14-000220-index.htm) Registration filed | 333-193424 | 0001047469-14-000220 | | 2010-05-26 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999510001632/9999999995-10-001632-index.htm) Declared effective | 333-166806 | 9999999995-10-001632 | | 2010-05-13 | [S-3](https://www.sec.gov/Archives/edgar/data/357173/000104746910005260/0001047469-10-005260-index.htm) Shelf registered | 333-166806 | 0001047469-10-005260 | | 2009-04-23 | [S-3](https://www.sec.gov/Archives/edgar/data/357173/000110465909025752/0001104659-09-025752-index.htm) Shelf registered | 333-158715 | 0001104659-09-025752 | | 2007-12-27 | [EFFECT](https://www.sec.gov/Archives/edgar/data/357173/999999999507005105/9999999995-07-005105-index.htm) Declared effective | 333-148173 | 9999999995-07-005105 | | 2003-06-26 | [424B1](https://www.sec.gov/Archives/edgar/data/357173/000104746903022390/0001047469-03-022390-index.htm) Final prospectus | 333-105421 | 0001047469-03-022390 | | 2003-05-20 | [S-3](https://www.sec.gov/Archives/edgar/data/357173/000104746903019340/0001047469-03-019340-index.htm) Shelf registered | 333-105421 | 0001047469-03-019340 | [All filings of this company](https://equitycapital.markets/filings?cik=357173) · [CSV](https://equitycapital.markets/filings.csv?cik=357173) --- Source page: https://equitycapital.markets/company/357173 · Data: U.S. SEC EDGAR · CC BY 4.0