---
schema_version: "secwatch.filing_event.v1"
accession: "0000357173-25-000082"
form_type: "8-K/A"
ticker: "OSBC"
cik: "0000357173"
company_name: "OLD SECOND BANCORP INC"
filed_at: "2025-09-17T23:59:59+00:00"
generated_at: "2026-05-17T06:25:29.102066+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Old Second closes Bancorp Financial buy; pro forma H1 2025 diluted EPS $0.43

## Summary
- Total purchase consideration ~$189.4M: $140.5M in OSBC stock (7.9M shares at $17.74) plus $48.9M cash.
- Pro forma combined assets $7.09B; net income $22.9M for H1 2025; diluted EPS $0.43 vs OSBC standalone $0.91.
- Preliminary goodwill $33.7M and core deposit intangible $6.2M recorded from purchase accounting.
- Bancorp Financial stockholders got $15.93 cash and 2.5814 OSBC shares per share held.
- Pro forma includes $18.4M day-two provision for credit losses on acquired non-PCD loans.

## SEC filing metadata
- accession: 0000357173-25-000082
- form_type: 8-K/A
- ticker: OSBC
- cik: 0000357173
- company_name: OLD SECOND BANCORP INC
- filed_at: 2025-09-17T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/357173/000035717325000082/0000357173-25-000082-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/357173/000035717325000082/tmb-20250701x8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000357173-25-000082
- JSON: https://secwatch.observer/filing/0000357173-25-000082.json
- Plain text: https://secwatch.observer/filing/0000357173-25-000082.txt

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