---
schema_version: "secwatch.filing_event.v1"
accession: "0000357173-24-000062"
form_type: "8-K"
ticker: "OSBC"
cik: "0000357173"
company_name: "OLD SECOND BANCORP INC"
filed_at: "2024-08-27T23:59:59+00:00"
generated_at: "2026-05-31T07:30:54.689503+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Old Second Bancorp to acquire 5 Chicago-area branches from First Merchants for $23M premium

## Summary
- Assumes ~$304M in deposits and purchases ~$12M in loans from First Merchants.
- Pays deposit premium of 7.5%, or ~$23M cash consideration; closing expected Q4 2024.
- Acquisition enhances Old Second's position in Southeast Chicago MSA; First Merchants exits suburban Chicago.
- Old Second had $5.7B in assets as of June 30, 2024; transaction subject to regulatory approval.

## SEC filing metadata
- accession: 0000357173-24-000062
- form_type: 8-K
- ticker: OSBC
- cik: 0000357173
- company_name: OLD SECOND BANCORP INC
- filed_at: 2024-08-27T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/357173/000035717324000062/0000357173-24-000062-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/357173/000035717324000062/tmb-20240826x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000357173-24-000062
- JSON: https://secwatch.observer/filing/0000357173-24-000062.json
- Plain text: https://secwatch.observer/filing/0000357173-24-000062.txt

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