First Interstate BancSystem, Inc. (FIBK) announced today the signing of a purchase and assumption agreement with Security First Bank to transfer eleven Nebraska branches from its wholly‑owned subsidiary, First Interstate Bank. The agreement covers the transfer of the branches’ facilities, deposits and loan portfolios, which as of September 30 2025 included roughly $280 million in deposits and $70 million in loans.
The divestiture aligns with FIBK’s ongoing strategy to shed non‑core, transactional assets and redeploy capital toward its core high‑growth markets. By divesting these Nebraska branches, FIBK expects to improve its capital ratios and free up resources for organic growth in its primary regions. The transaction also reflects the bank’s broader effort to streamline its branch network and focus on “full relationship banking.”
Security First Bank will assume ownership of the eleven branches—Alliance, Norfolk, Atkinson, O’Neill, Broken Bow, Ord, Burwell, Scottsbluff, Callaway, Sidney, and McCook—once regulatory approval is obtained. The parties anticipate closing the transaction in early 2026, at which point the branches will be fully integrated into Security First’s operations.
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