# FIRST INTERSTATE BANCSYSTEM INC

Summary updated: 2026-10-02T10:57:53.893738Z
Canonical: https://finbar.com/research/companies/first-interstate-bancsystem-inc

## Overview

First Interstate BancSystem, Inc. is a U.S. bank holding company whose principal business is community banking through First Interstate Bank. It provides commercial and consumer banking, alongside trust, employee-benefit, investment, and insurance services, to individuals, businesses, municipalities, and other customers. [1](https://app.finbar.com/go?id=P15819204)[2](https://app.finbar.com/go?id=P73249471)

The company operates across 12 western and midwestern states, with 290 banking offices as of February 20, 2026. [2](https://app.finbar.com/go?id=P73249471) Its careers page describes a workforce of nearly 3,500 employees. [3](https://www.firstinterstatebank.com/company/about/careers) The company states its purpose as, “We meet people where they are — helping them get to where they want to be,” and identifies Courage, Collaboration, and Curiosity as core principles. [4](https://www.firstinterstatebank.com/company/about/mission-vision-values) It was incorporated in Montana in 1971. [2](https://app.finbar.com/go?id=P73249471)
[1](https://app.finbar.com/go?id=P15819204)[2](https://app.finbar.com/go?id=P73249471)[3](https://www.firstinterstatebank.com/company/about/careers)[4](https://www.firstinterstatebank.com/company/about/mission-vision-values)[3](https://www.firstinterstatebank.com/company/about/careers)[4](https://www.firstinterstatebank.com/company/about/mission-vision-values)

## Products & services

First Interstate offers personal checking accounts—Orange, Select, Premier, and Simple—and savings products including Regular Savings, Money Market, IRAs, Health Savings Accounts, and certificates of deposit. Business deposit products include Classic, Enhanced, Analyzed, and Community Checking, as well as Business Savings and Business Money Market. [5](https://www.firstinterstatebank.com/personal/banking/checking)[6](https://www.firstinterstatebank.com/personal/banking/savings)[7](https://www.firstinterstatebank.com/business/banking/checking)[8](https://www.firstinterstatebank.com/business/banking/savings)

Its lending products span commercial real estate, construction, residential and agricultural real estate, commercial and industrial loans, equipment financing, and lines of credit; consumer offerings include personal and auto/recreation loans, debt consolidation, home equity lines of credit, and overdraft credit lines. The company also lists SBA 7(a), Express, and 504 financing. [9](https://app.finbar.com/go?id=P145684157)[10](https://www.firstinterstatebank.com/personal/borrowing)[11](https://www.firstinterstatebank.com/business/borrowing/commercial-loans)[12](https://www.firstinterstatebank.com/business/borrowing/sba-loans)

Digital and payment services include online and mobile banking, bill pay, transfers, alerts, mobile check deposit, debit-card management, and person-to-person payments. Business capabilities include ACH origination, wire transfers, payment controls and approvals, transaction reporting, online account management, and Remote Deposit Capture, which lets businesses scan and deposit checks from a desktop. Payment-services fees include card interchange and network fees, ATM fees, merchant transaction processing and account-management fees, and charges for services such as wires, bill pay, and cashier’s checks. [13](https://www.firstinterstatebank.com/personal/mobilebanking)[14](https://www.firstinterstatebank.com/business/solutions/online-banking.php)[15](https://www.firstinterstatebank.com/campaigns/tbs-tools)[16](https://www.firstinterstatebank.com/business/solutions/remote-deposit-capture)[17](https://app.finbar.com/go?id=P15958526)

Wealth and trust offerings include custody, investment management, trust administration, estate settlement, custodial accounts, property management, charitable giving, and corporate trustee services; investment products listed include ETFs, mutual funds, stocks, bonds, and annuities. [18](https://app.finbar.com/go?id=P58205984)[19](https://www.firstinterstatebank.com/personal/wealth/trust-and-estates)[20](https://www.firstinterstatebank.com/personal/investment-services)
[9](https://app.finbar.com/go?id=P145684157)[17](https://app.finbar.com/go?id=P15958526)[18](https://app.finbar.com/go?id=P58205984)[5](https://www.firstinterstatebank.com/personal/banking/checking)[6](https://www.firstinterstatebank.com/personal/banking/savings)[7](https://www.firstinterstatebank.com/business/banking/checking)[8](https://www.firstinterstatebank.com/business/banking/savings)[10](https://www.firstinterstatebank.com/personal/borrowing)[11](https://www.firstinterstatebank.com/business/borrowing/commercial-loans)[12](https://www.firstinterstatebank.com/business/borrowing/sba-loans)[13](https://www.firstinterstatebank.com/personal/mobilebanking)[14](https://www.firstinterstatebank.com/business/solutions/online-banking.php)[15](https://www.firstinterstatebank.com/campaigns/tbs-tools)[16](https://www.firstinterstatebank.com/business/solutions/remote-deposit-capture)[19](https://www.firstinterstatebank.com/personal/wealth/trust-and-estates)[20](https://www.firstinterstatebank.com/personal/investment-services)

## Geographic presence

As of July 30, 2026, First Interstate BancSystem operated 271 banking offices across 10 U.S. states: Colorado, Idaho, Iowa, Missouri, Montana, Nebraska, Oregon, South Dakota, Washington and Wyoming. [21](https://app.finbar.com/go?id=P145684148) The company had exited Arizona and Kansas after selling all locations in those states in October 2025; in July 2026 it closed one branch each in Iowa and Oregon and reported a planned Washington closure for the third quarter. [22](https://app.finbar.com/go?id=P69554674)[23](https://app.finbar.com/go?id=P145684169)

The company’s principal executive offices and a banking office are in Billings, Montana, which is also the location of its operations center. [24](https://app.finbar.com/go?id=P55800998)
[21](https://app.finbar.com/go?id=P145684148)[22](https://app.finbar.com/go?id=P69554674)[23](https://app.finbar.com/go?id=P145684169)[24](https://app.finbar.com/go?id=P55800998)

## Business segments

First Interstate BancSystem reports one operating and reportable segment, “community banking.” This segment encompasses commercial and consumer banking for individuals, businesses, municipalities, and other entities, using company-wide products, services, processes, and platforms. The company manages its activities on a consolidated basis, with the CEO serving as chief operating decision maker. [25](https://app.finbar.com/go?id=P115830721)[26](https://app.finbar.com/go?id=P145683816)[27](https://app.finbar.com/go?id=P145683818)

For the six months ended June 30, 2026, community banking therefore represents 100% of the company’s reported operating-segment business; this is an implication of the single-segment disclosure, not a separately reported segment-revenue percentage. The company does not disclose separate segment revenue shares for commercial versus consumer banking. [28](https://app.finbar.com/go?id=P145683815)

The latest interim segment disclosure reviewed is the Q2 2026 Form 10-Q; the fuller segment description is in the 2025 Form 10-K. [29](https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231.htm)[30](https://www.sec.gov/edgar/browse/?CIK=0000860413)
[25](https://app.finbar.com/go?id=P115830721)[26](https://app.finbar.com/go?id=P145683816)[27](https://app.finbar.com/go?id=P145683818)[28](https://app.finbar.com/go?id=P145683815)[29](https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231.htm)[30](https://www.sec.gov/edgar/browse/?CIK=0000860413)

## Company history

First Interstate BancSystem traces its origins to 1968, when Homer Scott Sr. purchased Bank of Commerce in Sheridan, Wyoming; he acquired Security Trust and Savings Bank in Billings, Montana, in 1970. The business incorporated as a bank holding company in 1971, and in 1984 entered an agreement to use the First Interstate name in Montana and Wyoming. [31](https://www.firstinterstatebank.com/company/about)

Following Wells Fargo’s 1996 acquisition of First Interstate Bancorp, First Interstate BancSystem acquired six banking offices in Montana and Wyoming and separately secured a license to use the First Interstate name. It continued expanding, including the acquisition of First Western Bank in 2008, which added 18 offices in South Dakota. The company completed its initial public offering in March 2010, with its shares listed on Nasdaq as FIBK. [31](https://www.firstinterstatebank.com/company/about)[32](https://www.prnewswire.com/news-releases/first-interstate-bancsystem-inc-completes-initial-public-offering-89408252.html)

From 2014 to 2019, the company expanded through combinations with Mountain West Bank, United Bank, Flathead Bank of Bigfork, Bank of the Cascades, Inland Northwest Bank, Idaho Independent Bank and Community 1st Bank. It completed its merger with Great Western Bancorp on February 1, 2022. Kevin P. Riley became president and CEO in 2015; James A. Reuter succeeded him in 2024. [33](https://companiesmarketcap.com/first-interstate-bancsystem/sec-reports-10k/0000860413-15-000007/)[34](https://www.sec.gov/Archives/edgar/data/860413/0000860413/000086041316000032/fibk-20151231x10k.htm)[35](https://www.sec.gov/Archives/edgar/data/860413/000094337416001159/press-release081216.htm)[36](https://www.sec.gov/Archives/edgar/data/860413/000119312517188836/d514428dex991.htm)[37](https://www.sec.gov/Archives/edgar/data/860413/000086041318000133/ex991_inbclosepr.htm)[38](https://www.businesswire.com/news/home/20190408005169/en/First-Interstate-BancSystem-Inc.-Completes-Acquisition-of-Idaho-Independent-Bank)[39](https://www.businesswire.com/news/home/20190408005164/en/Interstate-BancSystem-Completes-Acquisition-Community-1st-Bank/)[40](https://www.sec.gov/Archives/edgar/data/860413/000095010322001727/dp166234_ex9901.htm)[41](https://www.sec.gov/Archives/edgar/data/860413/000119312515261373/d46826dex991.htm)[42](https://www.sec.gov/Archives/edgar/data/860413/000086041324000125/fibk-20241009.htm)
[31](https://www.firstinterstatebank.com/company/about)[32](https://www.prnewswire.com/news-releases/first-interstate-bancsystem-inc-completes-initial-public-offering-89408252.html)[33](https://companiesmarketcap.com/first-interstate-bancsystem/sec-reports-10k/0000860413-15-000007/)[34](https://www.sec.gov/Archives/edgar/data/860413/0000860413/000086041316000032/fibk-20151231x10k.htm)[35](https://www.sec.gov/Archives/edgar/data/860413/000094337416001159/press-release081216.htm)[36](https://www.sec.gov/Archives/edgar/data/860413/000119312517188836/d514428dex991.htm)[37](https://www.sec.gov/Archives/edgar/data/860413/000086041318000133/ex991_inbclosepr.htm)[38](https://www.businesswire.com/news/home/20190408005169/en/First-Interstate-BancSystem-Inc.-Completes-Acquisition-of-Idaho-Independent-Bank)[39](https://www.businesswire.com/news/home/20190408005164/en/Interstate-BancSystem-Completes-Acquisition-Community-1st-Bank/)[40](https://www.sec.gov/Archives/edgar/data/860413/000095010322001727/dp166234_ex9901.htm)[41](https://www.sec.gov/Archives/edgar/data/860413/000119312515261373/d46826dex991.htm)[42](https://www.sec.gov/Archives/edgar/data/860413/000086041324000125/fibk-20241009.htm)[31](https://www.firstinterstatebank.com/company/about)[32](https://www.prnewswire.com/news-releases/first-interstate-bancsystem-inc-completes-initial-public-offering-89408252.html)[33](https://companiesmarketcap.com/first-interstate-bancsystem/sec-reports-10k/0000860413-15-000007/)[43](https://www.sec.gov/Archives/edgar/data/860413/000086041316000032/fibk-20151231x10k.htm)[35](https://www.sec.gov/Archives/edgar/data/860413/000094337416001159/press-release081216.htm)[36](https://www.sec.gov/Archives/edgar/data/860413/000119312517188836/d514428dex991.htm)[37](https://www.sec.gov/Archives/edgar/data/860413/000086041318000133/ex991_inbclosepr.htm)[38](https://www.businesswire.com/news/home/20190408005169/en/First-Interstate-BancSystem-Inc.-Completes-Acquisition-of-Idaho-Independent-Bank)[39](https://www.businesswire.com/news/home/20190408005164/en/Interstate-BancSystem-Completes-Acquisition-Community-1st-Bank/)[40](https://www.sec.gov/Archives/edgar/data/860413/000095010322001727/dp166234_ex9901.htm)[41](https://www.sec.gov/Archives/edgar/data/860413/000119312515261373/d46826dex991.htm)[42](https://www.sec.gov/Archives/edgar/data/860413/000086041324000125/fibk-20241009.htm)

## Sources

1. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P15819204)
2. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P73249471)
3. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/company/about/careers)
4. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/company/about/mission-vision-values)
5. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/personal/banking/checking)
6. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/personal/banking/savings)
7. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/business/banking/checking)
8. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/business/banking/savings)
9. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2026 Q 2)](https://app.finbar.com/go?id=P145684157)
10. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/personal/borrowing)
11. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/business/borrowing/commercial-loans)
12. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/business/borrowing/sba-loans)
13. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/personal/mobilebanking)
14. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/business/solutions/online-banking.php)
15. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/campaigns/tbs-tools)
16. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/business/solutions/remote-deposit-capture)
17. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P15958526)
18. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P58205984)
19. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/personal/wealth/trust-and-estates)
20. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/personal/investment-services)
21. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2026 Q 2)](https://app.finbar.com/go?id=P145684148)
22. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P69554674)
23. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2026 Q 2)](https://app.finbar.com/go?id=P145684169)
24. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P55800998)
25. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P115830721)
26. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2026 Q 2)](https://app.finbar.com/go?id=P145683816)
27. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2026 Q 2)](https://app.finbar.com/go?id=P145683818)
28. [FIRST INTERSTATE BANCSYSTEM INC — Full financial report (2026 Q 2)](https://app.finbar.com/go?id=P145683815)
29. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231.htm)
30. [www.sec.gov](https://www.sec.gov/edgar/browse/?CIK=0000860413)
31. [www.firstinterstatebank.com](https://www.firstinterstatebank.com/company/about)
32. [www.prnewswire.com](https://www.prnewswire.com/news-releases/first-interstate-bancsystem-inc-completes-initial-public-offering-89408252.html)
33. [companiesmarketcap.com](https://companiesmarketcap.com/first-interstate-bancsystem/sec-reports-10k/0000860413-15-000007/)
34. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/0000860413/000086041316000032/fibk-20151231x10k.htm)
35. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/000094337416001159/press-release081216.htm)
36. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/000119312517188836/d514428dex991.htm)
37. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/000086041318000133/ex991_inbclosepr.htm)
38. [www.businesswire.com](https://www.businesswire.com/news/home/20190408005169/en/First-Interstate-BancSystem-Inc.-Completes-Acquisition-of-Idaho-Independent-Bank)
39. [www.businesswire.com](https://www.businesswire.com/news/home/20190408005164/en/Interstate-BancSystem-Completes-Acquisition-Community-1st-Bank/)
40. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/000095010322001727/dp166234_ex9901.htm)
41. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/000119312515261373/d46826dex991.htm)
42. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/000086041324000125/fibk-20241009.htm)
43. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/860413/000086041316000032/fibk-20151231x10k.htm)

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