---
schema_version: "secwatch.filing_event.v1"
accession: "0000357173-21-000092"
form_type: "8-K"
ticker: "OSBC"
cik: "0000357173"
company_name: "OLD SECOND BANCORP INC"
filed_at: "2021-12-01T23:59:59+00:00"
generated_at: "2026-06-28T04:37:35.571616+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 completes West Suburban merger; pro forma assets $6.2B, 65 locations

## Summary
- West Suburban shareholders receive 42.413 OSBC shares + $271.15 cash per share.
- Pro forma as of Sep 30, 2021: $6.2B assets, $5.3B deposits, $3.4B loans, 65 branches.
- Keith Acker, Keith Kotche, John Williams join Old Second board of directors.
- CEO Keith Acker's employment agreement includes death benefit up to $750,000.

## SEC filing metadata
- accession: 0000357173-21-000092
- form_type: 8-K
- ticker: OSBC
- cik: 0000357173
- company_name: OLD SECOND BANCORP INC
- filed_at: 2021-12-01T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.01, 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/357173/000035717321000092/0000357173-21-000092-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/357173/000035717321000092/osbc-20211201x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000357173-21-000092
- JSON: https://secwatch.observer/filing/0000357173-21-000092.json
- Plain text: https://secwatch.observer/filing/0000357173-21-000092.txt

## Key facts
- Executive change
  Keith Kotche was appointed as Director at OLD SECOND BANCORP INC.
  - Action: appointed
  - Role: Director
  source text: appointed three former West Suburban Bank directors to the Board as follows: Keith Acker, John Williams, Jr. and Keith Kotche (the “ New Directors ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/357173/000035717321000092/0000357173-21-000092-index.htm
- Executive change
  Keith Acker was appointed as Director at OLD SECOND BANCORP INC.
  - Action: appointed
  - Role: Director
  source text: appointed three former West Suburban Bank directors to the Board as follows: Keith Acker, John Williams, Jr. and Keith Kotche (the “ New Directors ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/357173/000035717321000092/0000357173-21-000092-index.htm
- Executive change
  John Williams, Jr. was appointed as Director at OLD SECOND BANCORP INC.
  - Action: appointed
  - Role: Director
  source text: appointed three former West Suburban Bank directors to the Board as follows: Keith Acker, John Williams, Jr. and Keith Kotche (the “ New Directors ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/357173/000035717321000092/0000357173-21-000092-index.htm

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