First Interstate Bancsystem Inc SEC filings FIBK
First Interstate Bancsystem Inc has 1,001 filings in SEC EDGAR's recent list, going back to Jul 2, 2018. Its latest annual report, Form ARS, was filed on Apr 16, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 2, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 22, 2026 (results of operations, regulation fd disclosure, other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 144 | Notice of proposed sale | Nov 2, 2026 | — |
| 144 | Notice of proposed sale | Oct 30, 2026 | — |
| 4 | Insider transaction | Oct 26, 2026 | Oct 23, 2026 |
| 4 | Insider transaction | Oct 23, 2026 | Oct 22, 2026 |
| 144 | Notice of proposed sale | Oct 22, 2026 | — |
| 4 | Insider transaction | Oct 6, 2026 | Oct 5, 2026 |
| 4 | Insider transaction | Sep 22, 2026 | Sep 10, 2026 |
| 4 | Insider transaction | Sep 16, 2026 | Sep 16, 2026 |
| 4 | Insider transaction | Sep 16, 2026 | Sep 14, 2026 |
| 3 | Initial insider ownership | Sep 15, 2026 | Sep 14, 2026 |
| 4 | Insider transaction | Sep 14, 2026 | Sep 14, 2026 |
| 4 | Insider transaction | Sep 14, 2026 | Sep 11, 2026 |
| 144 | Notice of proposed sale | Sep 11, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| 4 | Insider transaction | Jul 28, 2026 | Jul 27, 2026 |
| 4 | Insider transaction | Jul 24, 2026 | Jul 22, 2026 |
| 4 | Insider transaction | Jul 24, 2026 | Jul 22, 2026 |
| 3 | Initial insider ownership | Jul 21, 2026 | Jul 13, 2026 |
| 3 | Initial insider ownership | Jul 21, 2026 | Jul 13, 2026 |
| 4 | Insider transaction | Jul 16, 2026 | Jul 16, 2026 |
| 144 | Notice of proposed sale | Jul 16, 2026 | — |
| 4 | Insider transaction | Jun 18, 2026 | Jun 18, 2026 |
| 144 | Notice of proposed sale | Jun 18, 2026 | — |
| 4 | Insider transaction | Jun 18, 2026 | Jun 18, 2026 |
| 4 | Insider transaction | Jun 18, 2026 | Jun 17, 2026 |
| 144 | Notice of proposed sale | Jun 17, 2026 | — |
| 4 | Insider transaction | Jun 4, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 4 | Insider transaction | May 1, 2026 | Apr 30, 2026 |
| 144 | Notice of proposed sale | Apr 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 3 | Initial insider ownership | Apr 29, 2026 | Apr 29, 2026 |
| 3 | Initial insider ownership | Apr 28, 2026 | Apr 25, 2026 |
| 4 | Insider transaction | Mar 27, 2026 | Mar 26, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 5, 2026 | — |
| 5 | Annual insider ownership | Feb 18, 2026 | Dec 31, 2025 |
| 5 | Annual insider ownership | Feb 17, 2026 | Dec 31, 2025 |
| 5 | Annual insider ownership | Feb 17, 2026 | Dec 31, 2025 |
| 5 | Annual insider ownership | Feb 17, 2026 | Dec 31, 2025 |
| 144 | Notice of proposed sale | Feb 11, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 9, 2026 | — |
| 144 | Notice of proposed sale | Feb 3, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 8, 2026 | — |
| 4 | Insider transaction | Jan 6, 2026 | Jan 5, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Dec 8, 2025 |
| 144 | Notice of proposed sale | Jan 5, 2026 | — |
| 4 | Insider transaction | Dec 15, 2025 | Dec 8, 2025 |
| 4 | Insider transaction | Dec 10, 2025 | Dec 8, 2025 |
| 4 | Insider transaction | Dec 4, 2025 | Dec 3, 2025 |
| 4 | Insider transaction | Dec 1, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Nov 24, 2025 | Nov 24, 2025 |
| 144 | Notice of proposed sale | Nov 24, 2025 | — |
| 4 | Insider transaction | Nov 14, 2025 | Nov 12, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Sep 9, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 12, 2025 | — |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| 144 | Notice of proposed sale | Nov 10, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 4, 2025 | — |
| 4 | Insider transaction | Nov 3, 2025 | Nov 3, 2025 |
| 4 | Insider transaction | Nov 3, 2025 | Nov 3, 2025 |
| 144 | Notice of proposed sale | Nov 3, 2025 | — |
| 4 | Insider transaction | Oct 29, 2025 | Oct 29, 2025 |
| 144 | Notice of proposed sale | Oct 29, 2025 | — |
| 4 | Insider transaction | Oct 9, 2025 | Sep 10, 2025 |
| 3 | Initial insider ownership | Oct 9, 2025 | Sep 10, 2025 |
| 4 | Insider transaction | Oct 9, 2025 | Oct 9, 2025 |
| 4 | Insider transaction | Oct 8, 2025 | Oct 7, 2025 |
| 144/A | Filing | Oct 8, 2025 | — |
| 144 | Notice of proposed sale | Oct 7, 2025 | — |
| 4 | Insider transaction | Oct 3, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 9, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 5, 2025 | Aug 5, 2025 |
| 3 | Initial insider ownership | Sep 5, 2025 | Aug 29, 2025 |
| 144 | Notice of proposed sale | Sep 2, 2025 | — |
| 4 | Insider transaction | Sep 2, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Aug 29, 2025 | Aug 27, 2025 |
| 3 | Initial insider ownership | Aug 21, 2025 | Aug 13, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 14, 2025 |
| 144 | Notice of proposed sale | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2025 | — |
| 4 | Insider transaction | Aug 1, 2025 | Aug 1, 2025 |
| 5 | Annual insider ownership | Jul 18, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jul 15, 2025 | Jul 14, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 15, 2025 | — |
| 144 | Notice of proposed sale | Jul 14, 2025 | — |
| 3/A | Form 3/a | Jun 5, 2025 | Jun 1, 2025 |
| 3 | Initial insider ownership | Jun 4, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | May 30, 2025 | May 24, 2023 |
| 4 | Insider transaction | May 29, 2025 | May 28, 2025 |
| 3 | Initial insider ownership | Apr 29, 2025 | Apr 22, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 17, 2025 | — |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Feb 26, 2025 | Feb 26, 2025 |
| 144 | Notice of proposed sale | Feb 26, 2025 | — |
| 4 | Insider transaction | Feb 18, 2025 | Feb 14, 2025 |
| 144 | Notice of proposed sale | Feb 14, 2025 | — |
| 4 | Insider transaction | Feb 14, 2025 | Oct 30, 2024 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 12, 2025 | — |
| 4 | Insider transaction | Feb 11, 2025 | Feb 10, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Dec 13, 2024 | Dec 11, 2024 |
| 4 | Insider transaction | Nov 25, 2024 | Nov 22, 2024 |
| 144 | Notice of proposed sale | Nov 22, 2024 | — |
| 4 | Insider transaction | Nov 14, 2024 | Nov 12, 2024 |
| 144 | Notice of proposed sale | Nov 13, 2024 | — |
| 4 | Insider transaction | Nov 12, 2024 | Nov 8, 2024 |
| 144 | Notice of proposed sale | Nov 12, 2024 | — |
| 144 | Notice of proposed sale | Nov 12, 2024 | — |
| 144 | Notice of proposed sale | Nov 12, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| 4 | Insider transaction | Nov 8, 2024 | Nov 6, 2024 |
| 144 | Notice of proposed sale | Nov 7, 2024 | — |
| 144 | Notice of proposed sale | Nov 7, 2024 | — |
| 144 | Notice of proposed sale | Nov 7, 2024 | — |
| 4 | Insider transaction | Nov 5, 2024 | Nov 1, 2024 |
| 3 | Initial insider ownership | Nov 5, 2024 | Nov 1, 2024 |
| 4 | Insider transaction | Aug 27, 2024 | Aug 23, 2024 |
| 4 | Insider transaction | Aug 2, 2024 | Jul 31, 2024 |
| 4 | Insider transaction | Aug 1, 2024 | Jul 31, 2024 |
| 144 | Notice of proposed sale | Aug 1, 2024 | — |
| 4 | Insider transaction | Jul 31, 2024 | Jul 30, 2024 |
| 144 | Notice of proposed sale | Jul 30, 2024 | — |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 144 | Notice of proposed sale | Jun 11, 2024 | — |
| 144 | Notice of proposed sale | Jun 11, 2024 | — |
| 144 | Notice of proposed sale | Jun 11, 2024 | — |
| 144 | Notice of proposed sale | Jun 11, 2024 | — |
| 144 | Notice of proposed sale | Jun 11, 2024 | — |
| 144 | Notice of proposed sale | Jun 11, 2024 | — |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 3 | Initial insider ownership | Jun 3, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 29, 2024 | May 28, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | May 29, 2024 | — |
| 4 | Insider transaction | May 15, 2024 | May 14, 2024 |
| 144 | Notice of proposed sale | May 14, 2024 | — |
| 144 | Notice of proposed sale | May 14, 2024 | — |
| 144 | Notice of proposed sale | May 14, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Apr 4, 2024 | — |
| 4/A | Form 4/a | Mar 26, 2024 | Mar 15, 2024 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- State Commercial Banks (SIC 6022)
- Listed as
- FIBK (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Billings, MT
- SEC filer status
- Large accelerated filer
- SEC CIK
- 860413
- Former names
- FIRST INTERSTATE BANCSYSTEM OF MONTANA INC (until Mar 9, 1999)
Other State Commercial Banks companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.