X0508 4 2023-11-14 0001174850 NICOLET BANKSHARES INC NIC 0001253903 ATWELL ROBERT BRUCE C/O NICOLET NATIONAL BANK 111 NORTH WASHINGTON STREET GREEN BAY WI 54301 1 1 Executive Chairman 0 Common Stock 2023-11-14 4 F 0 318 78.12 D 58160 D Common Stock 2023-11-15 4 G 0 600 0 D 57560 D Common Stock 2023-11-16 4 S 0 3113 75.64 D 54447 D Common Stock 300 I Son's UTMA Account Shares withheld to satisfy tax obligation of vested restricted stock. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.38 to $76.27, inclusive. Mr. Atwell 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 at each separate price within the range set forth in footnote (2) to this Form 4. Includes 22 shares acquired under the Employee Stock Purchase Plan since Mr. Atwell's previous Form 4 filing dated August 14, 2023. Mr. Atwell owns a total of 459 shares in the Employee Stock Purchase Plan as of the date of this report. /s/ H. Phillip Moore, Jr., as attorney-in-fact for Robert B. Atwell 2023-11-16