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 |
|---|---|---|---|
| 305B2 | Filing | Jun 5, 2025 | — |
| 8-A12B/A | Filing | May 25, 2023 | — |
| 15-12G | Deregistration | Jul 11, 2022 | — |
| 8-A12B/A | Filing | Jul 8, 2022 | — |
| 425 | Form 425 | Jan 11, 2022 | — |
| 425 | Form 425 | Dec 23, 2021 | — |
| EFFECT | Filing | Dec 16, 2021 | — |
| CORRESP | Letter to the SEC | Dec 14, 2021 | — |
| UPLOAD | Letter from the SEC | Nov 9, 2021 | — |
| 425 | Filing | Oct 29, 2021 | — |
| 425 | Filing | Oct 29, 2021 | — |
| 425 | Form 425 | Sep 21, 2021 | — |
| 425 | Form 425 | Sep 21, 2021 | — |
| 425 | Form 425 | Sep 20, 2021 | — |
| 425 | Form 425 | Sep 20, 2021 | — |
| 425 | Form 425 | Sep 17, 2021 | — |
| 425 | Form 425 | Sep 17, 2021 | — |
| 425 | Form 425 | Sep 17, 2021 | — |
| 425 | Form 425 | Sep 16, 2021 | — |
| 425 | Form 425 | Sep 16, 2021 | — |
| 425 | Form 425 | Sep 16, 2021 | — |
| 425 | Form 425 | Sep 16, 2021 | — |
| 425 | Form 425 | Sep 16, 2021 | — |
| 425 | Form 425 | Sep 16, 2021 | — |
| 425 | Form 425 | Sep 16, 2021 | — |
| 425 | Form 425 | Sep 16, 2021 | — |
| 305B2 | Filing | May 12, 2020 | — |
| EFFECT | Filing | Mar 23, 2020 | — |
| EFFECT | Filing | May 7, 2019 | — |
| EFFECT | Filing | May 7, 2019 | — |
| 425 | Form 8-k | Mar 18, 2019 | — |
| 425 | 8-k | Mar 18, 2019 | — |
| 425 | 8-k | Oct 11, 2018 | — |
| 425 | 8-k | Oct 11, 2018 | — |
| EFFECT | Filing | Sep 10, 2018 | — |
| EFFECT | Filing | Jul 3, 2018 | — |
| CORRESP | Letter to the SEC | Jul 2, 2018 | — |
Showing 37 filings. 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.