144 0001253903 XXXXXXXX LIVE 0001174850 NICOLET BANKSHARES INC 001-37700 111 N WASHINGTON ST GREEN BAY WI 54301 920 430 1400 ATWELL ROBERT BRUCE Director Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

3309 495767.81 21366851 03/12/2026 NYSE Common 03/12/2026 Stock Option Exercise Issuer N 3309 03/12/2026 Cash N Robert Atwell

111 North Washington Street Green Bay WI 54301

Common 03/05/2026 3331 501892.88 Robert Atwell

111 North Washington Street Green Bay WA 64301

Common 02/18/2026 6396 994357.75 03/12/2026 /s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Robert Atwell