---
schema_version: "secwatch.filing_event.v1"
accession: "0000357173-23-000018"
form_type: "8-K"
ticker: "OSBC"
cik: "0000357173"
company_name: "OLD SECOND BANCORP INC"
filed_at: "2023-04-19T23:59:59+00:00"
generated_at: "2026-06-16T23:58:21.299533+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Old Second Q1 net income $23.6M ($0.52/sh), NIM 4.74%; loan growth 3.5%; NPLs rise to 1.6%

## Summary
- Net income $23.6M, diluted EPS $0.52 (flat QoQ; up from $0.27 YoY). Adjusted EPS also $0.52.
- Net interest margin (TE) 4.74% (+11bps QoQ, +186bps YoY); net interest income $64.1M (+55.4% YoY).
- Total loans $4.00B (+3.5% QoQ); nonperforming loans $64.5M (1.6% of loans) vs $32.9M (0.9%) Q4 2022.
- Noninterest expense down 9.5% QoQ to $35.9M; efficiency ratio improved to 47.52% from 52.44%.
- Dividends declared $0.05/sh payable May 8; tangible common equity ratio improved to 6.83%.

## SEC filing metadata
- accession: 0000357173-23-000018
- form_type: 8-K
- ticker: OSBC
- cik: 0000357173
- company_name: OLD SECOND BANCORP INC
- filed_at: 2023-04-19T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/357173/000035717323000018/0000357173-23-000018-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/357173/000035717323000018/tmb-20230419x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000357173-23-000018
- JSON: https://secwatch.observer/filing/0000357173-23-000018.json
- Plain text: https://secwatch.observer/filing/0000357173-23-000018.txt

## Key facts
- Earnings Releases
  OLD SECOND BANCORP INC reported first quarter ended March 31, 2023 results: net income Net income of $23.6 Million, EPS $0.52 per Diluted Share.
  - Period: first quarter ended March 31, 2023
  - Net income: Net income of $23.6 Million
  - EPS: $0.52 per Diluted Share
  - Result: reported results
  source text: Old Second Bancorp, Inc. Reports First Quarter 2023 Net Income of $23.6 Million, or $0.52 per Diluted Share
  evidence_url: https://www.sec.gov/Archives/edgar/data/357173/000035717323000018/0000357173-23-000018-index.htm

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