---
schema_version: "secwatch.filing_event.v1"
accession: "0000357173-26-000016"
form_type: "8-K"
ticker: "OSBC"
cik: "0000357173"
company_name: "OLD SECOND BANCORP INC"
filed_at: "2026-04-01T23:59:59+00:00"
generated_at: "2026-05-15T08:03:32.497611+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Old Second Bancorp to report Q1 2026 earnings on April 22, call April 23

## Summary
- Q1 2026 financial results to be released after market close on April 22, 2026.
- Earnings call scheduled for April 23, 2026 at 10:00 AM ET / 9:00 AM CT.
- Webcast accessible via https://www.webcaster5.com/Webcast/Page/2239/53807.
- Replay available on investor relations website for up to one year.
- No preliminary financial data or guidance provided in this filing.

## SEC filing metadata
- accession: 0000357173-26-000016
- form_type: 8-K
- ticker: OSBC
- cik: 0000357173
- company_name: OLD SECOND BANCORP INC
- filed_at: 2026-04-01T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: high
- EDGAR index: https://www.sec.gov/Archives/edgar/data/357173/000035717326000016/0000357173-26-000016-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/357173/000035717326000016/osbc-20260401x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000357173-26-000016
- JSON: https://secwatch.observer/filing/0000357173-26-000016.json
- Plain text: https://secwatch.observer/filing/0000357173-26-000016.txt

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