# Filing Detail

Form 8-K - Current report:
SEC Accession No. 0000357173-26-000042
Filing Date
2026-07-22
Accepted
2026-07-22 16:05:10
Documents
25
Period of Report
2026-07-22
Items
Item 2.02: Results of Operations and Financial Condition
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 8-K | osbc-20260722x8k.htm iXBRL | 8-K | 42105
2 | EX-99.1 | osbc-20260722xex99d1.htm | EX-99.1 | 2402059
3 | EX-99.2 | osbc-20260722xex99d2.htm | EX-99.2 | 17290
4 | GRAPHIC | osbc-20260722x8k001.jpg | GRAPHIC | 12346
5 | GRAPHIC | osbc-20260722xex99d1001.jpg | GRAPHIC | 10649
6 | GRAPHIC | osbc-20260722xex99d2g001.jpg | GRAPHIC | 29758
7 | GRAPHIC | osbc-20260722xex99d2g002.jpg | GRAPHIC | 108937
8 | GRAPHIC | osbc-20260722xex99d2g003.jpg | GRAPHIC | 96650
9 | GRAPHIC | osbc-20260722xex99d2g004.jpg | GRAPHIC | 93157
10 | GRAPHIC | osbc-20260722xex99d2g005.jpg | GRAPHIC | 92254
11 | GRAPHIC | osbc-20260722xex99d2g006.jpg | GRAPHIC | 94927
12 | GRAPHIC | osbc-20260722xex99d2g007.jpg | GRAPHIC | 96787
13 | GRAPHIC | osbc-20260722xex99d2g008.jpg | GRAPHIC | 112052
14 | GRAPHIC | osbc-20260722xex99d2g009.jpg | GRAPHIC | 98310
15 | GRAPHIC | osbc-20260722xex99d2g010.jpg | GRAPHIC | 114848
| Complete submission text file | 0000357173-26-000042.txt |  | 3975900

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
16 | EX-101.SCH | osbc-20260722.xsd | EX-101.SCH | 2931
17 | EX-101.LAB | osbc-20260722_lab.xml | EX-101.LAB | 15366
18 | EX-101.PRE | osbc-20260722_pre.xml | EX-101.PRE | 10383
29 | EXTRACTED XBRL INSTANCE DOCUMENT | osbc-20260722x8k_htm.xml | XML | 4638

Mailing Address 37 SOUTH RIVER STREET AURORA IL 60507
Business Address 37 S RIVER ST AURORA IL 60507 6308920202
OLD SECOND BANCORP INC (Filer) CIK: 0000357173 (see all company filings)

EIN.: 363143493 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 000-10537 | Film No.: 261193738
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)