Business Description

Overview We are a financial holding company headquartered in Denver, Colorado, providing a full spectrum of deposit, lending, treasury management, wealth management and online banking products and services through our two primary operating subsidiaries—Sunflower Bank, a national banking association headquartered in Dallas, Texas, that operates as Sunflower Bank, N.A. and First National 1870, a division of Sunflower Bank, N.A., and Sunflower Wealth Advisors LLC, a registered investment advisor organized under the laws of the State of Kansas that provides discretionary investment management to retail and institutional accounts. FirstSun has a third wholly-owned subsidiary, FEIF Capital Partners, LLC, a Delaware limited liability company, which is planned to serve as the investment manager of a prospective credit fund. Sunflower Bank was founded in 1892 and offers a full range of specialized financial services to business customers as well as relationship-focused services to meet personal, business and wealth management financial objectives for its customers throughout Texas, Kansas, Colorado, New Mexico, Arizona, California and Washington and a mortgage lending platform with capabilities in 44 states. Our product line includes commercial and industrial loans and commercial real estate loans, residential mortgage and other consumer loans, a variety of commercial, consumer and private banking deposit products, including noninterest-bearing accounts, interest-bearing demand products, savings accounts, money market accounts and certificates of deposit. Additionally, Sunflower Bank provides treasury management products and services and together with Sunflower Wealth Advisors offers wealth management and trust products including private banking, personal trust and agency accounts, employee benefit and retirement related trust and agency accounts, investment management and advisory agency accounts, and foundation and endowment trust and agency accounts. As of December 31, 2025, we had consolidated total assets of $8.5 billion, total net loans held-for-investment of $6.6 billion, total deposits of $7.1 billion and total stockholders’ equity of $1.2 billion. Pending Merger with First Foundation Inc. On October 27, 2025, we entered into a merger agreement with First Foundation, the holding company of First Foundation Bank, headquartered in Irvine, California, as amended by amendment no. 1 to the merger agreement dated February 6, 2026. Under the merger agreement, First Foundation will merge with and into FirstSun, with FirstSun continuing as the surviving entity. Immediately following the merger, First Foundation Bank will merge with and into Sunflower Bank, with Sunflower Bank continuing as the surviving bank. The consummation of the proposed merger will expand our markets in California and Texas, as well as add new markets in Florida, Nevada and Hawaii. The merger agreement, as amended, was unanimously approved by the boards of directors of FirstSun and First Foundation, and is subject to customary closing conditions, including receipt of remaining required regulatory approvals. The stockholders of FirstSun and First Foundation approved the merger agreement and transactions contemplated thereby at special stockholders’ meetings held on February 27, 2026. The merger is expected to close early in the second quarter of 2026. History and Growth We were originally incorporated in the State of Kansas on November 9, 1981, as Handi-Bancshares, Inc., to serve as the holding company of Sunflower Bank (formerly The First National Bank and Trust Company of Salina), before we changed our name to Sunflower Financial, Inc. in 2008. We subsequently changed our name to FirstSun Capital Bancorp and simultaneously reincorporated under the laws of the State of Delaware in June 2017. The subsequent name change and reincorporation were completed pursuant to the merger agreement entered into on July 28, 2016, by and among FirstSun, Strategic Growth Bank Incorporated, which we refer to as “SGB,” Strategic Growth Bancorp Incorporated, which we refer to as “Strategic” and First National Bancorp Incorporated, which we refer to as “FNB,” and together with SGB and Strategic, as the “SGB parties.” 7 Table of Contents On June 19, 2017, we completed our merger with the SGB parties. Under the merger agreement for the SGB mergers, FirstSun also acquired Guardian Mortgage Company, Inc., which we refer to as “Guardian,” a former subsidiary of Strategic.…