144 0001667436 XXXXXXXX LIVE 0001174850 NICOLET BANKSHARES INC 001-37700 111 N WASHINGTON ST GREEN BAY WI 54301 920 430 1400 Witczak Eric James Officer Common Charles Schwab & Co., Inc.

3000 Schwab Way Westlake TX 76262

1215 206112.60 21251905 07/27/2026 NYSE Common 12/06/2015 Option Exercise Eric J. Witczak N 272 12/06/2015 Cash option exercise Common 07/14/2023 Employee Stock Purchase Plan (ESPP) Eric J. Witczak N 38 07/14/2023 Payroll deduction ESPP participation Common 10/13/2023 Employee Stock Purchase Plan (ESPP) Eric J. Witczak N 45 10/13/2023 Payroll deduction ESPP participation Common 11/14/2023 Restricted Stock Vesting Eric J. Witczak N 279 11/14/2023 Shares withheld to cover vesting tax liability; residual shares issued. Common 11/20/2023 Restricted Stock Vesting Eric J. Witczak N 160 11/20/2023 Shares withheld to cover vesting tax liability; residual shares issued. Common 11/22/2023 Restricted Stock Vesting Eric J. Witczak N 316 11/22/2023 Shares withheld to cover vesting tax liability; residual shares issued. Common 01/12/2024 Employee Stock Purchase Plan (ESPP) Eric J. Witczak N 34 01/12/2024 Payroll deduction ESPP participation Common 04/12/2024 Employee Stock Purchase Plan (ESPP) Eric J. Witczak N 40 04/12/2024 Payroll deduction ESPP participation Common 07/12/2024 Employee Stock Purchase Plan Eric J. Witczak N 31 07/12/2024 Payroll deduction ESPP participation Y 07/27/2026 Eric J. Witczak