With a market capitalization (market cap) of $3.74B — a measure of how much the company is worth — First Interstate BancSystem, Inc. is the 1636th most valuable company in Financial Services as of August 18, 2026. Shares trade at $38.46, down +1.11% on the day.
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First Interstate BancSystem, Inc. functions as the parent company of First Interstate Bank, delivering a comprehensive suite of financial products and services across the United States. Its offerings encompass conventional deposit accounts such as checking, savings, and time deposits, alongside repurchase agreements primarily catering to commercial and municipal clients. The institution further extends various lending options, including real estate financing for commercial, construction, residential, agricultural, and other property types. Consumer credit is also available, covering direct personal loans, credit cards and lines of credit, and indirect lending. Additionally, it provides both variable and fixed-rate commercial loans designed to meet the working capital and expansion requirements of small to medium-sized enterprises in the manufacturing, wholesale, retail, and service sectors, as well as agricultural loans. Beyond traditional banking, the company furnishes an array of specialized services, including trust administration, employee benefits, investment management, insurance, agency, and custodial functions, catering to individuals, businesses, and philanthropic entities. Its operational support infrastructure encompasses services like marketing, credit assessment, loan servicing, credit card issuance and management, mortgage loan sales and servicing, indirect consumer loan acquisition and processing, and debt collection. Modern digital conveniences are also provided through online and mobile banking platforms. First Interstate serves a diverse clientele, encompassing individuals, businesses, and municipal bodies, across a wide spectrum of industries such as agriculture, construction, education, energy, government, healthcare, hospitality, housing, mining, professional services, real estate development, retail, technology, tourism, and wholesale trade. By the close of 2021 (December 31st), it maintained 147 banking locations, including standalone drive-through branches, situated within communities throughout Idaho, Montana, Oregon, South Dakota, Washington, and Wyoming. Established in 1971, the corporation's primary base of operations is in Billings, Montana.
Visit websiteAs of August 18, 2026, First Interstate BancSystem, Inc. (FIBK) is worth $3.74B — this is its market capitalization, the total value of all its outstanding shares.
First Interstate BancSystem, Inc.’s market cap is $3.74B, which ranks it #1636 among the most valuable companies in the Financial Services sector tracked on MarketCapLens.
First Interstate BancSystem, Inc. (FIBK) shares trade at $38.46, down 1.11% on the day, as of August 18, 2026.
Fundamentals are annual. Figures labeled with their fiscal year.
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First Interstate BancSystem, Inc. trades at a price-to-earnings (P/E) ratio of 13.0, based on its latest share price and annual earnings per share.