---
schema_version: "secwatch.filing_event.v1"
accession: "0000357173-25-000079"
form_type: "8-K"
ticker: "OSBC"
cik: "0000357173"
company_name: "OLD SECOND BANCORP INC"
filed_at: "2025-09-15T23:59:59+00:00"
generated_at: "2026-05-17T06:41:16.758717+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Old Second Bancorp director John Ladowicz resigns at age 73 under mandatory retirement policy

## Summary
- John Ladowicz resigned from Board effective Sept 14, 2025, upon turning 73 per company's Director Resignation Policy.
- Resignation not due to any disagreement with Old Second Bancorp.
- Ladowicz served on Audit, Compensation, Nominating, Loan, and Risk committees since 2008.
- Board will not immediately fill vacancy; board size reduced by one member.
- Board realigned director classes in Feb 2025 anticipating Ladowicz's retirement.

## SEC filing metadata
- accession: 0000357173-25-000079
- form_type: 8-K
- ticker: OSBC
- cik: 0000357173
- company_name: OLD SECOND BANCORP INC
- filed_at: 2025-09-15T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/357173/000035717325000079/0000357173-25-000079-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/357173/000035717325000079/tmb-20250914x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000357173-25-000079
- JSON: https://secwatch.observer/filing/0000357173-25-000079.json
- Plain text: https://secwatch.observer/filing/0000357173-25-000079.txt

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