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

3102 364954.55 15211674 02/24/2025 NYSE Common 02/24/2025 Stock Option Exercise Issuer N 3102 02/24/2025 Cash N Robert Atwell

111 North Washington Street Green Bay WI 54301

Common 12/02/2024 3446 389398.00 Robert Atwell

111 North Washington Street Green Bay WI 54301

Common 12/05/2024 8945 1010785.00 Robert Atwell

111 North Washington Street Green Bay WI 54301

Common 12/10/2024 7609 859817.00 George Atwell

111 North Washington Street, Green Bay, WI 54301

Common 01/28/2025 150 16606.50 Robert Atwell

11 North Washington Street, Green Bay WI 54301

Common 02/12/2025 3975 469368.32 Regarding the Securities Sold During the Past 3 Months section - The sale of 150 shares on 01/28/2025 was placed by George Atwell, the son of Robert Atwell. 02/24/2025 /s/ Ryan Riviere, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Robert Atwell