---
schema_version: "secwatch.filing_event.v1"
accession: "0000357173-25-000044"
form_type: "8-K"
ticker: "OSBC"
cik: "0000357173"
company_name: "OLD SECOND BANCORP INC"
filed_at: "2025-05-22T23:59:59+00:00"
generated_at: "2026-05-20T19:12:06.943917+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Old Second receives regulatory approvals for Bancorp Financial merger; close expected July 2025

## Summary
- Received required bank regulatory approvals for merger with Bancorp Financial, Inc. (Oakbrook, IL).
- Completion still subject to Bancorp Financial stockholder approval and other customary closing conditions.
- Old Second expects to close the transaction in July 2025; operates 53 branches in Illinois.
- Bancorp Financial maintains 3 banking locations in DuPage/Cook counties, IL, plus one Reno, NV loan office.
- CEO James Eccher cites enhanced financial strength and Chicago market position from the combination.

## SEC filing metadata
- accession: 0000357173-25-000044
- form_type: 8-K
- ticker: OSBC
- cik: 0000357173
- company_name: OLD SECOND BANCORP INC
- filed_at: 2025-05-22T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/357173/000035717325000044/0000357173-25-000044-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/357173/000035717325000044/tmb-20250522x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000357173-25-000044
- JSON: https://secwatch.observer/filing/0000357173-25-000044.json
- Plain text: https://secwatch.observer/filing/0000357173-25-000044.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.