First Interstate BancSystem, Inc. (FIBK) ownership: Top institutional holder: BlackRock, Inc. ($450.21M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 13479487.00 | $450.21M | 2026-03-31 |
| VANGUARD GROUP INC | 10048419.00 | $347.68M | 2025-12-31 |
| STATE STREET CORP | 5891271.00 | $196.77M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 5630789.00 | $188.07M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5490538.00 | $183.38M | 2026-03-31 |
| First Interstate Bank | 4653119.00 | $155.41M | 2026-03-31 |
| HoldCo Asset Management, LP | 3950107.00 | $131.93M | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 3882437.00 | $129.67M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-18 | |
| Sell | null | 2026-06-18 | |
| Sell | null | 2026-06-18 | |
| Sell | null | 2026-06-18 | |
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.