NIC

Shares withheld to satisfy tax obligation of vested restricted stock.

Includes shares acquired under the Employee Stock Purchase Plan. I have not acquired additional shares under the Employee Stock Purchase Plan since my last Form 4 filing on May 19, 2026. I own a total of 503 shares in the Employee Stock Purchase Plan as of the date of this report.

The Company paid Mr. Atwell the Board annual cash retainer and annual committee fees, all of which Mr. Atwell deferred into the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors.

The Company paid Mr. Hayek the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Ms. McCormick the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Dykema the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Long the Board annual cash retainer, annual committee fees, and nominating and governance committee chair fee, all of which Mr. Long deferred into the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors.

The Company paid Mr. Smith the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Ms. Godwin the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Chaney the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Dykema the Board annual cash retainer, annual committee fees, and compensation committee chair fee, all of which Mr. Dykema deferred into the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors.

The Company paid Mr. Long the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Tellock the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Atwell the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Weyers the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Weyers the Board annual cash retainer and annual committee fees, all of which Mr. Weyers deferred in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors.

The Company paid Ms. Merkatoris the Board annual retainer, granted as a restricted stock award with an immediate full vest of 429 shares, as of May 19, 2026.

The Company paid Mr. Chaney the Board annual cash retainer and annual committee fees, all of which Mr. Chaney deferred in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors.

Includes shares acquired under the Employee Stock Purchase Plan. I have not acquired additional shares under the Employee Stock Purchase Plan since my last Form 4 filing on April 28, 2026. I own a total of 503 shares in the Employee Stock Purchase Plan as of the date of this report.

On May 5, 2026, Mr. Daniels transferred 7,738 shares of Nicolet Bankshares, Inc. common stock to the Daniels Revocable Trust for no consideration. Mr. Daniels is trustee of the trust, and Mr. Daniels and his spouse are the sole beneficiaries of the trust. Mr. Daniels remains the beneficial owner of the securities held by the trust.

Includes shares acquired under the Employee Stock Purchase Plan. Mr. Daniels has not acquired additional shares under the Employee Stock Purchase Plan since his last Form 4 filing on May 4, 2026. Mr. Daniels owns a total of 1,103 shares in the Employee Stock Purchase Plan as of the date of this report.

On May 5, 2026, Mr. Daniels transferred 7,738 shares of Nicolet Bankshares, Inc. common stock to the Daniels Revocable Trust for no consideration. Mr. Daniels is trustee of the trust, and Mr. Daniels and his spouse are the sole beneficiaries of the trust. Mr. Daniels remains the beneficial owner of the securities held by the trust.

On April 30, 2026, Mr. Daniels transferred 53,714 shares of Nicolet Bankshares, Inc. common stock to the Daniels Revocable Trust for no consideration. Mr. Daniels is trustee of the trust, and Mr. Daniels and his spouse are the sole beneficiaries of the trust. Mr. Daniels remains the beneficial owner of the securities held by the trust.

Includes an additional 42 shares acquired under the Employee Stock Purchase Plan since Mr. Daniels last Form 4 filing dated February 17, 2026. Mr. Daniels owns a total of 1,103 shares in the Employee Stock Purchase Plan as of the date of this report.

On April 30, 2026, Mr. Daniels transferred 53,714 shares of Nicolet Bankshares, Inc. common stock to the Daniels Revocable Trust for no consideration. Mr. Daniels is trustee of the trust, and Mr. Daniels and his spouse are the sole beneficiaries of the trust. Mr. Daniels remains the beneficial owner of the securities held by the trust.

I disclaim beneficial ownership of these holdings by my adult son, I have no pecuniary interest in the holdings, and the filing of this report is not an admission that I am the beneficial owner of these shares for purposes of Section 16 or for any other purpose.

I disclaim beneficial ownership of these holdings held by my adult son, I have no pecuniary interest in the holdings, and the filing of this report is not an admission that I am the beneficial owner of these shares for purposes of Section 16 or for any other purpose.

Includes 41 shares acquired under the Employee Stock Purchase Plan, since my previous Form 4 filing dated February 17, 2026. I own a total of 503 shares in the Employee Stock Purchase Plan as of the date of this report.

Shares withheld to satisfy tax obligation of vested restricted stock, April 15, 2026.

Includes 42 shares acquired under the Employee Stock Purchase Plan since Mr. Bohn's last Form 4 filing dated February 17, 2026. Mr. Bohn owns a total of 158 shares in the Employee Stock Purchase Plan as of the date of this report.

Mr. Atwell acquired 12.712 shares in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors by deferring his first quarter 2026 earned board fees.

Includes 1.172 shares received as dividend reinvestment in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors from Nicolet Bankshares, Inc. paid cash dividend on March 16, 2026.

Mr. Weyers acquired 6.356 shares in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors by deferring his first quarter 2026 earned board fees.

Includes 20.660 shares received as dividend reinvestment in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors from Nicolet Bankshares, Inc. paid cash dividend on March 16, 2026.

Mr. Dykema acquired 6.356 shares in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors by deferring his first quarter 2026 earned board fees.

Includes 20.386 shares received as dividend reinvestment in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors from Nicolet Bankshares, Inc. paid cash dividend on March 16, 2026.

Mr. Long acquired 6.356 shares in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors by deferring his first quarter 2026 earned board fees.

Includes 11.834 shares received as dividend reinvestment in the Nicolet National Bank Deferred Compensation Plan for Non-employee Directors from Nicolet Bankshares, Inc. paid cash dividend on March 16, 2026.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $149.13 to $149.96, 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 sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

The nonqualified options vested in five annual installments of 13,500 shares on November 1 of each year, beginning on November 1, 2018, and fully vested on November 1, 2022. The nonqualified options are currently exercisable as to 47,500.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $150.960 to $151.790, 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 sold at each separate price within the ranges set forth in footnote (2) to this Form 4.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $149.795 to $150.920, 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 (1) to this Form 4.

The nonqualified options vested in five annual installments of 13,500 shares on November 1 of each year, beginning on November 1, 2018, and fully vested on November 1, 2022. The nonqualified options are currently exercisable as to 57,500.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $154.898 to $155.824, 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 sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

The nonqualified options fully vested as of May 16, 2022, and have been fully exercised as of the date of this report.

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.