---
schema_version: "secwatch.filing_event.v1"
accession: "0001709442-25-000085"
form_type: "8-K"
ticker: "FSUN"
cik: "0001709442"
company_name: "FIRSTSUN CAPITAL BANCORP"
filed_at: "2025-12-04T23:59:59+00:00"
generated_at: "2026-05-16T14:50:11.225579+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Castle Creek Capital acquires $40M stake in FirstSun, secures board seat; director to resign

## Summary
- Castle Creek affiliates acquired $40M of common stock from legacy stockholders, now owns ~4% of FirstSun.
- Spencer T. Cohn of Castle Creek will join board upon earlier of merger close with First Foundation Inc. or 2026 annual meeting.
- Director Isabella Cunningham announced resignation effective same trigger dates to make room for Castle Creek nominee.
- Castle Creek's investment validates FirstSun's pending merger with First Foundation Inc.

## SEC filing metadata
- accession: 0001709442-25-000085
- form_type: 8-K
- ticker: FSUN
- cik: 0001709442
- company_name: FIRSTSUN CAPITAL BANCORP
- filed_at: 2025-12-04T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1709442/000170944225000085/0001709442-25-000085-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1709442/000170944225000085/fcb-20251203.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001709442-25-000085
- JSON: https://secwatch.observer/filing/0001709442-25-000085.json
- Plain text: https://secwatch.observer/filing/0001709442-25-000085.txt

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