---
schema_version: "secwatch.filing_event.v1"
accession: "0000357173-25-000048"
form_type: "8-K"
ticker: "OSBC"
cik: "0000357173"
company_name: "OLD SECOND BANCORP INC"
filed_at: "2025-05-28T23:59:59+00:00"
generated_at: "2026-05-20T09:08:00.030095+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Old Second Bancorp doubles authorized common shares to 120M after stockholder approval

## Summary
- Certificate of Amendment filed to increase authorized common stock from 60M to 120M shares.
- Amendment approved by stockholders at the May 20, 2025 Annual Meeting.
- No immediate impact on outstanding shares or financials disclosed.

## SEC filing metadata
- accession: 0000357173-25-000048
- form_type: 8-K
- ticker: OSBC
- cik: 0000357173
- company_name: OLD SECOND BANCORP INC
- filed_at: 2025-05-28T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/357173/000035717325000048/0000357173-25-000048-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/357173/000035717325000048/tmb-20250523x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000357173-25-000048
- JSON: https://secwatch.observer/filing/0000357173-25-000048.json
- Plain text: https://secwatch.observer/filing/0000357173-25-000048.txt

## Key facts
- Governance Changes
  OLD SECOND BANCORP INC: Filed a Certificate of Amendment to increase authorized shares of common stock from 60,000,000 to 120,000,000 (effective 2025-05-23).
  - Change: charter amendment
  - Effective: 2025-05-23
  source text: On May 23, 2025, Old Second Bancorp, Inc. (the “Company”) filed a Certificate of Amendment to its Restated Certificate of Incorporation with the Secretary of State of Delaware to increase the number of authorized shares of the Company’s common stock from 60,000,000 to 120,000,000.
  evidence_url: https://www.sec.gov/Archives/edgar/data/357173/000035717325000048/0000357173-25-000048-index.htm

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