Results of Operations and Financial Condition. On July 27, 2026, FirstSun Capital Bancorp (the “Company”) issued an earnings press release announcing financial results for the second quarter ended June 30, 2026. The earnings press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Other Events. On July 24, 2026, the Company’s board of directors authorized a share repurchase program to purchase up to $150.0 million of the Company’s common stock in open market transactions or privately negotiated transactions, including pursuant to a trading plan in accordance with Rule 10b5-1 and/or Rule 10b-18 under the Securities Exchange Act of 1934, as amended. The timing, pricing, and amount of any repurchases under the repurchase program will be determined by our management at its…

Regulation FD Disclosure. FirstSun Capital Bancorp (“FirstSun,” “we,” “us,” and “our”), the holding company for Sunflower Bank, National Association (the “Bank”), expects its second quarter 2026 financial results to be adversely affected by charge-offs, primarily related to two commercial lending relationships, and related increases in our provision for credit losses. The first lending relationship is an asset-based loan to a materials distributor with an outstanding principal balance of appr…

Results of Operations and Financial Condition. The information set forth under

The filing describes the approval of an Executive Annual Incentive Plan, which is a compensation arrangement and not a management change.

Other Events. On June 25, 2026, FirstSun Capital Bancorp (“FirstSun,” “we,” “us,” and “our”), the holding company for Sunflower Bank, National Association (the “Bank”), announced that the Bank completed the sale of approximately $336 million of performing municipal loans acquired from First Foundation Bank to an unaffiliated third party. The sale of municipal loans was contemplated and announced as part of our acquisition of First Foundation Inc. (“First Foundation”), which closed on April 1,…

Other Events. On June 4, 2026, the Bank closed on the sale of approximately $890 million of performing multifamily commercial real estate loans acquired from First Foundation Bank to entities affiliated with Brookfield Asset Management. The loan sale was contemplated and announced as part of our acquisition of First Foundation Inc. (“First Foundation”), which closed on April 1, 2026, and we expect to complete the remainder of our previously disclosed balance sheet loan downsizing before the e…

Regulation FD Disclosure. On June 5, 2026, FirstSun, the holding company for Sunflower Bank, National Association (the “Bank”), announced that the Bank closed on the sale of approximately $890 million of performing multifamily commercial real estate loans acquired from First Foundation Bank. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1. The information set forth in

Results of Operations and Financial Condition. On April 27, 2026, FirstSun Capital Bancorp (the “Company”) issued an earnings press release announcing financial results for the first quarter ended March 31, 2026. The earnings press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Completion of Acquisition or Disposition of Assets. On April 1, 2026, FirstSun completed its previously announced Merger with First Foundation, pursuant to the Merger Agreement. At the effective time of the Merger (the “ Effective Time ”), First Foundation merged with and into FirstSun, with FirstSun surviving the Merger. Immediately following the Merger, First Foundation Bank, a California-chartered banking corporation and wholly owned subsidiary of First Foundation, merged with and into Sun…

Director — Isabella Cunningham, Diane L. Merdian: Directors Isabella Cunningham and Diane L. Merdian resigned due to the merger.

Entry into a Material Definitive Agreement. Amendment No. 2 to Registration Rights Agreement On April 1, 2026, FirstSun, its existing significant investors, and certain stockholder funds and accounts managed or advised by Fortress Investment Group LLC (“ Fortress ”) and certain stockholder funds and accounts managed or advised by Canyon Capital Advisors LLC (“ Canyon ”), and Strategic Value Investors, LP (together with Fortress and Canyon, the “ First Foundation Stockholders ”) entered into A…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. In connection with the completion of the Merger, FirstSun assumed First Foundation’s obligations under that certain Indenture, dated as of January 24, 2022 (the “ Base Indenture ”), between First Foundation and U.S. Bank National Association, as trustee, and that certain First Supplemental Indenture, dated as of January 24, 2022 (the “ First Supplemental Indenture ” and, together…

Material Modification to Rights of Security Holders. The information set forth under

Results of Operations and Financial Condition. On January 26, 2026, FirstSun Capital Bancorp (the “Company”) issued an earnings press release announcing financial results for the fourth quarter and full year ended December 31, 2025. The earnings press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Director — Diane L. Merdian: Ms. Merdian resigned as a director, and Peter E. Murphy was appointed to fill the vacancy.

director — Isabella Cunningham: Ms. Cunningham resigned as a director of the company.

Entry into a Material Definitive Agreement. Entry into Board Representative Letter Agreement On December 3, 2025, FirstSun Capital Bancorp (the “ Company ”) entered into a Board Representative Letter Agreement with Castle Creek Capital Partners IX, LP (“ Castle Creek ”) that provides, beginning with the earlier of (i) the closing of the Company’s proposed merger with First Foundation Inc. (the “ Proposed Merger Closing ”) and (ii) the 2026 Annual Meeting of the Stockholders of the Company (th…

Entry into a Material Definitive Agreement. Entry into Board Representative Letter Agreement On December 3, 2025, FirstSun Capital Bancorp (the “ Company ”) entered into a Board Representative Letter Agreement with Castle Creek Capital Partners IX, LP (“ Castle Creek ”) that provides, beginning with the earlier of (i) the closing of the Company’s proposed merger with First Foundation Inc. (the “ Proposed Merger Closing ”) and (ii) the 2026 Annual Meeting of the Stockholders of the Company (th…

Director — Isabella Cunningham: Ms. Cunningham resigned as a director of the Company with her resignation effective upon the Proposed Merger Closing or the 2026 Annual Meeting.

Entry into a Material Definitive Agreement. Merger Agreement On October 27, 2025, FirstSun Capital Bancorp (“FirstSun”) and First Foundation Inc. (“First Foundation”) entered into an Agreement and Plan of Merger (as it may be amended, modified or supplemented from time to time, the “Merger Agreement”) pursuant to which First Foundation will merge with and into FirstSun, with FirstSun continuing as the surviving corporation (the “Merger”). Immediately following the completion of the Merger, an…

Results of Operations and Financial Condition. On October 27, 2025 , FirstSun Capital Bancorp (the “Company”) issued an earnings press release announcing financial results for the third quarter ended September 30, 2025. The earnings press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Results of Operations and Financial Condition. On July 28, 2025 , FirstSun Capital Bancorp (the “Company”) issued an earnings press release announcing financial results for the second quarter ended June 30, 2025. The earnings press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

to the Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission on February 25, 2025, by FirstSun Capital Bancorp (the “Company”), in which the Company described Board Representative Letter Agreements entered into with four stockholders, including Aquiline SGB Holdings LLC (“Aquiline”, that agreement referred to hereinafter as the “Aquiline Board Representative Agreement”). That description set forth under the heading “—Entry into Board Representative Letter Agreement…

Termination of a Material Definitive Agreement Reference is made to