# First Interstate Bancsystem Inc: overview

FIBK · Nasdaq · CIK 860413 · [Financials](/sectors/financials.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/fibk.md) · [Financials](/companies/fibk/financials.md) · [Filings](/companies/fibk/filings.md) · [Insiders](/companies/fibk/insiders.md)

Revenue is not reported in this company’s XBRL financial statements.

## Last eight quarters

| Line item | Unit | Q3 FY2024 (2024-09-30) | Q4 FY2024 (2024-12-31) | Q1 FY2025 (2025-03-31) | Q2 FY2025 (2025-06-30) | Q3 FY2025 (2025-09-30) | Q4 FY2025 (2025-12-31) | Q1 FY2026 (2026-03-31) | Q2 FY2026 (2026-06-30) |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Revenue | $ | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported |
| Gross margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported |
| Operating margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported |
| Net margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported |
| Diluted EPS | $ per share | [0.54](/filings/0000860413-25-000165.md) | not reported | [0.49](/filings/0000860413-26-000038.md) | [0.69](/filings/0000860413-26-000084.md) | [0.69](/filings/0000860413-25-000165.md) | not reported | [0.61](/filings/0000860413-26-000038.md) | [0.87](/filings/0000860413-26-000084.md) |
| Free cash flow | $ | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported |

- Revenue. XBRL not reported.
- Gross margin (gross profit / revenue). XBRL not reported.
- Operating margin (operating income / revenue). XBRL not reported.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss. Derived values: 12-month figure less the 9-month figure.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities. Derived values: 9-month figure less the 6-month figure; 12-month figure less the 9-month figure; 6-month figure less the 3-month figure.

## Last five fiscal years

| Line item | Unit | FY2021 (2021-12-31) | FY2022 (2022-12-31) | FY2023 (2023-12-31) | FY2024 (2024-12-31) | FY2025 (2025-12-31) |
| --- | --- | ---: | ---: | ---: | ---: | ---: |
| Revenue | $ | not reported | not reported | not reported | not reported | not reported |
| Gross margin | % | not reported | not reported | not reported | not reported | not reported |
| Operating margin | % | not reported | not reported | not reported | not reported | not reported |
| Net margin | % | not reported | not reported | not reported | not reported | not reported |
| Diluted EPS | $ per share | [3.11](/filings/0000860413-24-000016.md) | [1.96](/filings/0000860413-25-000022.md) | [2.48](/filings/0000860413-26-000011.md) | [2.19](/filings/0000860413-26-000011.md) | [2.94](/filings/0000860413-26-000011.md) |
| Free cash flow | $ | not reported | not reported | not reported | not reported | not reported |

- Revenue. XBRL not reported.
- Gross margin (gross profit / revenue). XBRL not reported.
- Operating margin (operating income / revenue). XBRL not reported.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities.

Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/fibk/insiders.md)

None in coverage.

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $529.5m | 13,732,702 |  | Added +253,215 |
| [STATE STREET CORP](/funds/93751.md) | 2026-06-30 | $241.0m | 6,250,817 |  | Added +359,546 |
| [DIMENSIONAL FUND ADVISORS LP](/funds/354204.md) | 2026-06-30 | $223.0m | 5,783,231 |  | Added +152,442 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](/funds/2100121.md) | 2026-06-30 | $212.3m | 5,506,456 |  | Added +15,918 |
| [First Interstate Bank](/funds/1125727.md) | 2026-06-30 | $177.9m | 4,614,432 |  | Reduced −38,687 |
| [HoldCo Asset Management, LP](/funds/1724246.md) | 2026-06-30 | $152.3m | 3,950,107 |  | Unchanged |
| [WELLINGTON MANAGEMENT GROUP LLP](/funds/902219.md) | 2026-06-30 | $145.3m | 3,768,343 |  | Reduced −114,094 |
| [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $144.2m | 3,738,371 |  | Reduced −117,443 |
| [FMR LLC](/funds/315066.md) | 2026-06-30 | $95.0m | 2,463,971 |  | Reduced −1,413,225 |
| [GEODE CAPITAL MANAGEMENT, LLC](/funds/1214717.md) | 2026-06-30 | $92.1m | 2,387,561 |  | Added +169,242 |

## Recent filings

[All 2,183 filings](/companies/fibk/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-22 | 16:10 ET | [8-K](/filings/0000860413-26-000097.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0000860413-26-000097 |
| 2026-09-16 | 14:06 ET | [8-K](/filings/0000860413-26-000092.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000860413-26-000092 |
| 2026-08-21 | 09:20 ET | [8-K](/filings/0000860413-26-000088.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000860413-26-000088 |
| 2026-08-03 | 16:01 ET | [10-Q](/filings/0000860413-26-000084.md) | Quarterly report, period 2026-06-30 | 0000860413-26-000084 |
| 2026-07-23 | 16:14 ET | [8-K](/filings/0000860413-26-000081.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0000860413-26-000081 |
| 2026-07-16 | 16:06 ET | [8-K](/filings/0000860413-26-000078.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000860413-26-000078 |
| 2026-07-09 | 16:02 ET | [8-K](/filings/0000860413-26-000075.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000860413-26-000075 |
| 2026-05-29 | 16:26 ET | [8-K](/filings/0000860413-26-000048.md) | 5.02 Departure or appointment of officers or directors; 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0000860413-26-000048 |
| 2026-05-13 | 17:12 ET | [8-K](/filings/0000860413-26-000041.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000860413-26-000041 |
| 2026-05-07 | 16:10 ET | [10-Q](/filings/0000860413-26-000038.md) | Quarterly report, period 2026-03-31 | 0000860413-26-000038 |

## Latest annual report

[Form 10-K for the fiscal year ended Dec 31, 2025](/filings/0000860413-26-000011.md), filed Feb 26, 2026.

## Forecast league

Not in this season’s league. [This season’s league](/leagues.md)

## About the filer

- CIK: 860413
- Tickers: FIBK
- Exchange: Nasdaq
- SIC code: 6022 State Commercial Banks
- State of incorporation: DE
- Filer category: Large accelerated filer

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 30, 2026, 16:03 ET. No prices; not investment advice.