Firstsun Capital Bancorp 8-K/A Filing

Ticker: FSUN · Form: 8-K/A · Filed: Dec 10, 2025 · CIK: 1709442

Sentiment: neutral

Filing Stats: 1,016 words · 4 min read · ~3 pages · Grade level 12.2 · Accepted 2025-12-09 18:06:39

Filing Documents

01 Entry into a Material Definitive Agreement

Item 1.01 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 (the " 2026 Annual Meeting ") the Company will use its best efforts to cause an individual designated for nomination by Castle Creek to be elected or appointed to the board of directors of the Company and will recommend to its stockholders the election of such individual designated at the applicable stockholders' meetings of the Company. In addition, as of the date of the Board Representative Letter Agreement, to the extent Castle Creek does not have a board representative currently serving on the board of directors, Castle Creek may appoint an individual as a nonvoting observer to the board of directors. Such nomination and observer rights continue for so long as Castle Creek owns at least 40% of the total shares held by Castle Creek as of the date of the Board Representative Letter Agreement. The Board Representative Letter Agreement entered into with Castle Creek is substantially similar to the form of Board Representation Letter Agreements entered into with other stockholders of the Company as described in the Company's Current Report on Form 8-K filed with the Securities Exchange Commission on February 25, 2025. The foregoing description of the Board Representative Letter Agreement is not complete and is subject to and qualified in its entirety by reference to the full text of such agreement, a copy of which was included as Exhibit 4.1 to the Original Report. Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Offi

01 Other Events

Item 8.01 Other Events. On December 4, 2025, the Company and Castle Creek issued a joint press release announcing Castle Creek's investment in the Company and related board representation arrangement. A copy of the press release was furnished as Exhibit 99.1 to the Original Report.

01 Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits. (d) The following exhibit index lists the exhibits that are either filed or furnished with the Original Report: EXHIBIT INDEX Exhibit Number Description 4.1 Form of Board Representative Letter Agreement * 99.1 Joint Press Release, dated December 4, 2025 * 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). * Incorporated by reference to the exhibit of the same number in the Original Report. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. FIRSTSUN CAPITAL BANCORP Date: December 10, 2025 By: /s/ Neal E. Arnold Name: Neal E. Arnold Title: Chief Executive Officer

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