X0508 4 2026-02-13 0001174850 NICOLET BANKSHARES INC NIC 0001243706 DANIELS MICHAEL E C/O NICOLET NATIONAL BANK 111 NORTH WASHINGTON STREET GREEN BAY WI 54301 1 1 Chairman, President & CEO 0 Common Stock 2026-02-13 4 A 0 6666 155.19 A 129423 D Common Stock 2026-02-13 4 F 0 2624 155.19 D 126799 D Common Stock 6252 I By 401(k) Plan Common Stock 9803 I By Spouse Restricted stock unit ("RSU") vesting. Per the terms of the RSU, the performance-based metric of successfully closing the merger between Nicolet Bankshares, Inc., and MidWestOne Financial Group was completed on February 13, 2026. Shares withheld to cover the tax liability of the RSU performance vesting on February 13, 2026. Includes a total of 1,061 shares owned by Mr. Daniels in the Employee Stock Purchase Plan. Mr. Daniels has not acquired additional shares under the Employee Stock Purchase Plan since Mr. Daniels last Form 4 filing dated January 21, 2026. /s/ H. Phillip Moore, Jr., as attorney-in-fact for Michael E. Daniels 2026-02-17