Wellington Management Group LLP 13D and 13G filings for First Interstate BancSystem, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-05-15 07:24 am Sale | 2026-03-31 | 13G | FIRST INTERSTATE BANCSYSTEM, I FIBK | Wellington Management Group LLP | 3,882,437 4.000% | -2,032,988 (-34.37%) | Filing |
| 2025-11-12 09:33 am Purchase | 2025-09-30 | 13G | FIRST INTERSTATE BANCSYSTEM, I FIBK | Wellington Management Group LLP | 5,915,425 5.600% | 5,915,425 (New Position) | Filing |