---
schema_version: "secwatch.filing_event.v1"
accession: "0001709442-23-000014"
form_type: "8-K"
ticker: "FSUN"
cik: "0001709442"
company_name: "FIRSTSUN CAPITAL BANCORP"
filed_at: "2023-07-14T23:59:59+00:00"
generated_at: "2026-06-13T08:15:18.416016+00:00"
event_type: "cyber"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "medium"
source: SEC EDGAR
---

# FirstSun Capital Bancorp subsidiary Sunflower Bank reports MOVEit data breach; PII likely accessed

## Summary
- Progress Software notified Sunflower Bank of zero-day vulnerability in MOVEit software on May 31, 2023.
- Unauthorized party likely downloaded files containing personally identifiable information before the flaw was patched.
- Core processing systems were not impacted; no material interruption to business operations occurred.
- Bank is investigating, notifying affected parties, and expects to incur expenses and potential litigation/regulatory scrutiny.

## SEC filing metadata
- accession: 0001709442-23-000014
- form_type: 8-K
- ticker: FSUN
- cik: 0001709442
- company_name: FIRSTSUN CAPITAL BANCORP
- filed_at: 2023-07-14T23:59:59+00:00
- event_type: cyber
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: medium
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1709442/000170944223000014/0001709442-23-000014-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1709442/000170944223000014/fcb-20230714.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001709442-23-000014
- JSON: https://secwatch.observer/filing/0001709442-23-000014.json
- Plain text: https://secwatch.observer/filing/0001709442-23-000014.txt

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