X0508 4 2026-02-13 0001174850 NICOLET BANKSHARES INC NIC 0001192634 BOHN WILLIAM M C/O NICOLET NATIONAL BANK GREEN BAY WI 54301 1 EVP Wealth Mgmt - Nicolet Bank 0 Common Stock 2026-02-13 4 A 0 3333 155.19 A 18563 D Common Stock 2026-02-13 4 F 0 1080 155.19 D 17483 D 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 116 shares owned by Mr. Bohn in the Employee Stock Purchase Plan. Mr. Bohn has not acquired additional shares under the Employee Stock Purchase Plan since Mr. Bohn's last Form 4 filing dated January 21, 2026. /s/ H. Phillip Moore, Jr., as attorney-in-fact for William M. Bohn 2026-02-17