As of November 6, 2026, First Interstate Bancsystem Inc. is a publicly traded company (Nasdaq: FIBK); its largest reported holder is BlackRock, with 12.9% on Schedule 13G/A of January 8, 2026, then State Street (6.4%). The largest insider holding is J.S. Investments Limited Partnership, a 10% owner, with 4,409,349 shares (4.8% of shares outstanding), per Form 4 of December 13, 2024 (Schedule 13G/A, January 8, 2026).
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Is First Interstate Bancsystem Inc. a real, registered company?
- First Interstate Bancsystem Inc files with the SEC under CIK 860413 (its SEC filings).
- Its shares are listed under the ticker FIBK on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Billings, Montana, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under FIRST INTERSTATE BANCSYSTEM INC in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Matthew Ritter, Director (Form 8-K filed 2026-07-16). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names State Street (filed 2026-08-07).
Who are First Interstate Bancsystem Inc.'s owners and officers?
First Interstate Bancsystem Inc.: incorporated in Delaware; business address in Billings, Montana; industry State Commercial Banks (Schedule 13G, 2026-08-07).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-08-07 | State Street Corporation | 6.4% |
| Schedule 13G/A, 2026-05-15 | Wellington Management Group LLP | 4% |
| Schedule 13G, 2026-04-29 | Vanguard Portfolio Management | 5.46% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-03-05 | The Vanguard Group | 10% |
| Schedule 13G, 2026-02-09 | State Street Corporation | 5.3% |
| Schedule 13G/A, 2026-01-30 | The Vanguard Group | 9.76% |
| Schedule 13G/A, 2026-01-08 | Blackrock, Inc. | 12.9% |
| Schedule 13G, 2025-11-12 | Wellington Management Group LLP | 5.6% |
| Schedule 13G/A, 2025-11-04 | Franklin Mutual Advisers, LLC | 4% |
| Schedule 13G/A, 2025-08-06 | Fmr LLC | 5% |
| Schedule 13G, 2025-07-15 | Dimensional Fund Advisors LP | 5.2% |
Questions about who owns First Interstate Bancsystem Inc.
Who owns First Interstate Bancsystem Inc.?
On this page, 5 holders' latest ownership filings report 5% or more of First Interstate Bancsystem Inc.: Blackrock, Inc. (12.9%, Schedule 13G/A, filed 2026-01-08), State Street Corporation (6.4%, Schedule 13G, filed 2026-08-07), Vanguard Portfolio Management (5.46%, Schedule 13G, filed 2026-04-29), Dimensional Fund Advisors LP (5.2%, Schedule 13G, filed 2025-07-15) and Fmr LLC (5%, Schedule 13G/A, filed 2025-08-06).
Who are the largest shareholders of First Interstate Bancsystem Inc.?
By the share each holder's latest filing reports, the largest holders of First Interstate Bancsystem Inc. on this page are Blackrock, Inc. (12.9%), State Street Corporation (6.4%) and Vanguard Portfolio Management (5.46%).
When did Blackrock, Inc. buy into First Interstate Bancsystem Inc.?
The filings give report dates, not purchase dates. The earliest filing from Blackrock, Inc. on this page is the Schedule 13G/A, filed 2026-01-08, reporting 12.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-07-16 | Matthew Ritter | Director | appointed | |
| Form 8-K, 2026-07-16 | Matthew Ritter | appointed | ||
| Form 8-K, 2026-05-13 | Kristina Robbins | Chief Executive Officer | departed |
Which insiders own First Interstate Bancsystem Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- J.S. Investments Limited Partnership, a 10% owner: 4,409,349 shares (4.8% of shares outstanding), 21,333 held directly and 4,388,016 indirectly, on a joint filing (Form 4, 2024-12-13).
- , a director and 10% owner: 3,518,192 shares (3.8% of shares outstanding), 5,743 held directly and 3,512,449 indirectly (Form 4, 2026-06-03).
- NBAR5 Limited Partnership, a 10% owner: 3,516,495 shares (3.8% of shares outstanding), 2,946 held directly and 3,513,549 indirectly, on a joint filing (Form 5, 2026-02-17).
- , Jeremy Scott Revocable Trust Dtd 6/25/15, a 10% owner: 3,516,495 shares (3.8% of shares outstanding), 2,946 held directly and 3,513,549 indirectly, on a joint filing (Form 5, 2026-02-17).
- NBAR5 S, LP, a 10% owner: 3,492,251 shares (3.8% of shares outstanding), 2,946 held directly and 3,489,305 indirectly, on a joint filing (Form 4, 2025-06-03).
Shares outstanding: 92,581,035 as of 2026-10-30, from the company's latest SEC cover page.
How much has First Interstate Bancsystem Inc. raised?
No fundraising or offering filing from First Interstate Bancsystem Inc. is on file with us.
Keep reading
More on First Interstate Bancsystem Inc. and the records around it.
First Interstate Bancsystem Inc. elsewhere on the record
- Leadership changes Sep 2026
- 5%+ stake filings Aug 2026
Companies that share a holder
- Franklin Mutual Advisers, LLC also filed stake reports on 14 other companies: BENCHMARK ELECTRONICS INC (Apr 2026), Ryerson Holding Corp (Apr 2026), Select Water Solutions, Inc. (Apr 2026)
- Wellington Management Group LLP also filed stake reports on 240 other companies: Hub Group, Inc. (Oct 2026), Latham Group, Inc. (Oct 2026), Redwood Trust, Inc. (Oct 2026)
- STATE STREET CORPORATION also filed stake reports on 343 other companies: TRADE DESK INC/THE (Oct 2026), CENTRUS ENERGY CORP (Sep 2026), ACADIA PHARMACEUTICALS INC (Aug 2026)
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