X0508 4 2024-03-12 0001174850 NICOLET BANKSHARES INC NIC 0001253903 ATWELL ROBERT BRUCE C/O NICOLET NATIONAL BANK 111 NORTH WASHINGTON STREET GREEN BAY WI 54301 1 0 Common Stock 2024-03-12 4 S 0 2000 81.93 D 42889 D Common Stock 2024-03-12 4 S 0 150 81.87 D 150 I Son's UTMA Account The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.80 to $82.07, inclusive. The reporting person undertakes to provide to Nicolet Bankshares, Inc., any security holder of Nicolet Bankshares, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. /s/ H. Phillip Moore, Jr., as attorney-in-fact for Robert B. Atwell 2024-03-14