# First Interstate Bancsystem Inc: Form DEF 14A, filed Apr 16, 2026

- Company: [First Interstate Bancsystem Inc](/companies/fibk.md) (CIK 860413)
- Form: DEF 14A
- Filed: 2026-04-16
- Accepted by EDGAR: Apr 16, 2026, 16:09 ET
- Period: 2025-12-31
- Accession: 0000860413-26-000025
- Inline XBRL: yes
- Main document: https://www.sec.gov/Archives/edgar/data/860413/000086041326000025/fibk-20260415.htm
- All documents and exhibits: https://www.sec.gov/Archives/edgar/data/860413/000086041326000025/

## 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/860413/000086041326000025/fibk-20260415.htm

Filed Apr 16, 2026.
Source: SEC EDGAR, the filing index for accession 0000860413-26-000025. Last ingested by Listed: Nov 10, 2026, 17:57 ET. No prices; not investment advice.