---
schema_version: "secwatch.filing_event.v1"
accession: "0001015328-25-000140"
form_type: "8-K"
ticker: "WTFC"
cik: "0001015328"
company_name: "WINTRUST FINANCIAL CORP"
filed_at: "2025-06-13T23:59:59+00:00"
generated_at: "2026-05-19T07:28:40.388564+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Director Richard L. Postma resigns from Wintrust board effective June 11, 2025

## Summary
- Richard L. Postma resigned from the Board of Directors for personal reasons.
- Resignation effective immediately on June 11, 2025.
- Mr. Postma's departure not due to any disagreement with the Company on operations, policies or practices.

## SEC filing metadata
- accession: 0001015328-25-000140
- form_type: 8-K
- ticker: WTFC
- cik: 0001015328
- company_name: WINTRUST FINANCIAL CORP
- filed_at: 2025-06-13T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1015328/000101532825000140/0001015328-25-000140-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1015328/000101532825000140/wtfc-20250611.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001015328-25-000140
- JSON: https://secwatch.observer/filing/0001015328-25-000140.json
- Plain text: https://secwatch.observer/filing/0001015328-25-000140.txt

## Key facts
- Executive change
  Richard L. Postma resigned as Director at WINTRUST FINANCIAL CORP.
  - Action: resigned
  - Role: Director
  source text: On June 11, 2025, Richard L. Postma submitted his resignation from the Board of Directors of Wintrust Financial Corporation (the “Company”), effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1015328/000101532825000140/0001015328-25-000140-index.htm

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