---
schema_version: "secwatch.filing_event.v1"
accession: "0000860413-25-000152"
form_type: "8-K"
ticker: "FIBK"
cik: "0000860413"
company_name: "FIRST INTERSTATE BANCSYSTEM INC"
filed_at: "2025-10-14T23:59:59+00:00"
generated_at: "2026-05-17T04:02:10.850789+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# First Interstate closes sale of 12 branches in AZ and KS to Enterprise Bank

## Summary
- Transaction closed October 10, 2025; buyer is Enterprise Bank & Trust.
- Twelve branches in Arizona and Kansas transferred, with deposits, loans, and real estate.
- Enterprise Bank is a wholly owned subsidiary of Enterprise Financial Services Corp.

## SEC filing metadata
- accession: 0000860413-25-000152
- form_type: 8-K
- ticker: FIBK
- cik: 0000860413
- company_name: FIRST INTERSTATE BANCSYSTEM INC
- filed_at: 2025-10-14T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/860413/000086041325000152/0000860413-25-000152-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/860413/000086041325000152/fibk-20251010.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000860413-25-000152
- JSON: https://secwatch.observer/filing/0000860413-25-000152.json
- Plain text: https://secwatch.observer/filing/0000860413-25-000152.txt

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