# First Interstate Bancsystem Inc: Form 8-K, filed Sep 16, 2026

- Company: [First Interstate Bancsystem Inc](/companies/fibk.md) (CIK 860413)
- Form: 8-K
- Filed: 2026-09-16
- Accepted by EDGAR: Sep 16, 2026, 14:06 ET
- Period: 2026-09-14
- Accession: 0000860413-26-000092
- Inline XBRL: yes
- Main document: https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/fibk-20260914.htm
- All documents and exhibits: https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/

## Items reported

- Item 5.02: Departure or appointment of officers or directors
- Item 9.01: Financial statements and exhibits

## Sections

Sections are extracted only from 10-K and 10-Q reports. Read this filing’s documents on sec.gov. https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/fibk-20260914.htm

Filed Sep 16, 2026.
Source: SEC EDGAR, the filing index for accession 0000860413-26-000092. Last ingested by Listed: Nov 10, 2026, 17:57 ET. No prices; not investment advice.