FirstSun enters board representation agreement with Castle Creek; director Cunningham to resign

FIRSTSUN CAPITAL BANCORP

Castle Creek gets board nomination rights after merger close or 2026 annual meeting; observer rights until 40% ownership threshold.
Director Isabella Cunningham resigns effective at same trigger events; board size held unchanged to accommodate Castle Creek nominee.
Castle Creek must hold at least 40% of its current shares as of December 3, 2025 to retain nomination and observer rights.
Agreement is substantially similar to board representation letters with other stockholders filed in February 2025.

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