First Interstate Bancsystem Inc is a financial and bank holding company that concentrates on community banking. Since its incorporation in Montana in 1971 the firm has expanded through organic growth and strategic acquisitions. As of February 20 2026 it operated 290 banking offices including branches and detached drive up facilities across twelve states. Through its subsidiary First Interstate Bank the company offers a full suite of banking products and services such as online and mobile banking to individuals businesses government entities and other clients in its market areas. As of December 31 2025 the company reported consolidated assets of approximately twenty six point six billion dollars. Deposits totaled about twenty two point one billion dollars and loans held for investment reached fifteen point two billion dollars. Stockholders equity stood at three point four billion dollars. The firm's vision is to meet people where they are and help them reach where they want to be. It stresses lasting relationships thoughtful decisions and support for employees clients communities and shareholders.

The company generates revenue primarily from interest earned on loans and leases. It also collects fees from deposit accounts wealth management services mortgage servicing and other financial activities. Loan interest comes from commercial real estate consumer agricultural and other lending products. Fee income arises from service charges on accounts transaction processing and advisory services. Interest income also arises from securities held in the bank's investment portfolio. The firm collects fees from automated teller machine usage overdraft protection and wire transfer services. Wealth management generates revenue from asset management fees trust administration fees and insurance commissions. Mortgage servicing contributes through servicing fees and the sale of mortgage loans to secondary markets. Additionally the company earns interchange fees from debit card transactions subject to regulatory caps.

The company operates through the following segments: community banking.

• The community banking segment encompasses commercial governmental and consumer banking services. It includes the acceptance of deposits the extension of credit mortgage loan origination and servicing and wealth management which covers trust employee benefit investment management insurance agency and custodial services. The segment serves individuals businesses nonprofit organizations and government entities across the company's footprint. The segment also provides treasury management services cash management and lockbox processing for commercial clients. It offers commercial cards and small business lending programs tailored to local needs. Through its network of branches the segment delivers face to face interactions that reinforce relationship building. The chief operating decision maker is the Chief Executive Officer who evaluates performance and allocates resources to this segment.

First Interstate Bancsystem Inc holds a solid position among regional banks in the states where it operates. It competes with national banks regional banks credit unions savings and loan associations and financial technology firms. The company's competitive advantage stems from its deep local knowledge and relationship based approach to banking. It emphasizes personalized service rapid decision making at the branch level and active involvement in the communities it serves. This focus enables the firm to attract and retain customers who value a community oriented banking experience. In Montana the bank holds about sixteen point six percent of total deposits giving it a strong market presence. In Wyoming it holds thirteen point three percent of deposits reflecting a similar position. The company's ability to adapt products to local conditions helps it compete against larger institutions that may have higher lending limits but less localized focus. Its emphasis on relationship banking leads to higher customer satisfaction and retention rates compared with many competitors. The firm invests in technology to improve its omni channel experience while maintaining the personal touch that defines community banking.

The company serves a diverse customer base that includes individuals small and midsize businesses large corporations government agencies and nonprofit organizations. Its clients operate in sectors such as agriculture healthcare professional services technology construction hospitality real estate development tourism education housing retail wholesale trade and governmental services. The agricultural sector receives specialized financing for equipment land and operating needs. Healthcare providers rely on the bank for practice loans lines of credit and practice acquisition financing. Professional service firms such as law offices and accounting studios use the bank for working capital and equipment financing. Technology companies benefit from venture style lending and treasury services. Hospitality businesses including hotels and restaurants obtain financing for renovations and working capital. Real estate developers use the bank for construction loans land acquisition and permanent financing. Tourism operators receive funding for seasonal operations and promotional campaigns. Educational institutions access financing for facility improvements and student housing projects. Housing developers and property managers obtain loans for multifamily construction and renovation. Retail chains and wholesale distributors use the bank for inventory financing and supply chain support. Governmental entities receive services such as treasury management public fund investing and debt financing.