NGVT · Ingevity Corp

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.18 to $76.26, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, 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 range set forth in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.14 to $78.22, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, 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 range set forth in this footnote.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 restricted stock units that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the restricted stock units that vested on July 24, 2026.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Includes (i) 329 shares of Common Stock purchased pursuant to the Amended and Restated 2017 Ingevity Corporation Employee Stock Purchase Plan, as amended ("ESPP") for the purchase period of January 1, 2026 to March 31, 2026 (the "March ESPP Shares"), and (ii) 76 shares of Common Stock purchased pursuant to the ESPP for the purchase period of April 1, 2026 to June 30, 2026 (the "June ESPP Shares"). In accordance with the terms of the ESPP, the March ESPP Shares were purchased at a price equal to 85% of the closing price of Issuer's Common Stock on December 31, 2025 and the June ESPP Shares were purchased at a price equal to 85% of the closing price of the Issuer's Common Stock on April 1, 2026.

Represents vested deferred stock units ("DSUs") granted pursuant to the reporting person's election to receive DSUs in lieu of quarterly director fees. These DSUs will settle into an equal number of shares of the Company's Common Stock upon the reporting person's termination of board service pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan and 2025 Omnibus Incentive Plan, as amended.

Represents vested deferred stock units ("DSUs") granted pursuant to the reporting person's election to receive DSUs in lieu of quarterly director fees. These DSUs will settle into an equal number of shares of the Company's Common Stock upon the reporting person's termination of board service pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan and 2025 Omnibus Incentive Plan, as amended.

Grant of restricted stock units pursuant to the Ingevity Corporation 2025 Omnibus Incentive Plan, as amended, which will vest in three equal installments on June 22, 2027, 2028, and 2029.

Grant of restricted stock units ("RSUs") pursuant to the Ingevity Corporation 2025 Omnibus Incentive Plan, which will vest in three equal installments on May 1, 2027, 2028, and 2029.

Includes 422 shares of Common Stock purchased pursuant to the Amended and Restated 2017 Ingevity Corporation Employee Stock Purchase Plan, as amended ("ESPP"), for the purchase period of January 1, 2026 to March 31, 2026. In accordance with the terms of the ESPP, these shares were purchased at a price equal to 85% of the closing price of Issuer's Common Stock on December 31, 2025.

Represents a grant of deferred stock units ("DSUs") issued pursuant to the reporting person's election to receive DSUs in lieu of the annual non-employee director restricted stock unit grant. These DSUs will vest on April 30, 2027 and will settle into an equal number of shares of the issuer's Common Stock upon the reporting person's termination of board service pursuant to the issuer's Amended and Restated Non-Employee Director Deferred Compensation Plan and 2025 Omnibus Incentive Plan.

Grant of restricted stock units pursuant to Ingevity Corporation's 2025 Omnibus Incentive Plan, which will vest in full on April 30, 2027.

Grant of restricted stock units pursuant to Ingevity Corporation's 2025 Omnibus Incentive Plan, which will vest in full on April 30, 2027.

Grant of restricted stock units pursuant to Ingevity Corporation's 2025 Omnibus Incentive Plan, which will vest in full on April 30, 2027.

Grant of restricted stock units pursuant to Ingevity Corporation's 2025 Omnibus Incentive Plan, which will vest in full on April 30, 2027.

Grant of restricted stock units pursuant to Ingevity Corporation's 2025 Omnibus Incentive Plan, which will vest in full on April 30, 2027.

Represents a grant of deferred stock units ("DSUs") issued pursuant to the reporting person's election to receive DSUs in lieu of the annual non-employee director restricted stock unit grant. These DSUs will vest on April 30, 2027 and will settle into an equal number of shares of the issuer's Common Stock upon the reporting person's termination of board service pursuant to the issuer's Amended and Restated Non-Employee Director Deferred Compensation Plan and 2025 Omnibus Incentive Plan.

Represents a grant of deferred stock units ("DSUs") issued pursuant to the reporting person's election to receive DSUs in lieu of the annual non-employee director restricted stock unit grant. These DSUs will vest on April 30, 2027 and will settle into an equal number of shares of the issuer's Common Stock upon the reporting person's termination of board service pursuant to the issuer's Amended and Restated Non-Employee Director Deferred Compensation Plan and 2025 Omnibus Incentive Plan.

Includes 422 shares of Common Stock purchased pursuant to the Amended and Restated 2017 Ingevity Corporation Employee Stock Purchase Plan, as amended ("ESPP"), for the purchase period of January 1, 2026 to March 31, 2026. In accordance with the terms of the ESPP, these shares were purchased at a price equal to 85% of the closing price of Issuer's Common Stock on December 31, 2025.

Represents vested deferred stock units ("DSUs") granted pursuant to the reporting person's election to receive DSUs in lieu of quarterly director fees. These DSUs will settle into an equal number of shares of the Company's Common Stock upon the reporting person's termination of board service pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan and 2025 Omnibus Incentive Plan.

Represents vested deferred stock units ("DSUs") granted pursuant to the reporting person's election to receive DSUs in lieu of quarterly director fees. These DSUs will settle into an equal number of shares of the Company's Common Stock upon the reporting person's termination of board service pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan and 2025 Omnibus Incentive Plan.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2023 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2025 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2025 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2025 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2023 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2023 restricted stock units ("RSUs") that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2025 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2023 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2025 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2023 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2025 RSUs that vested.

Shares withheld by the Company to satisfy tax withholding obligations related to the 2024 RSUs that vested.

Grant of restricted stock units pursuant to the Ingevity Corporation 2025 Omnibus Incentive Plan, which will vest in three equal installments on February 27, 2027, 2028, and 2029.

Includes (i) 364 shares of Common Stock purchased pursuant to the Amended and Restated 2017 Ingevity Corporation Employee Stock Purchase Plan, as amended ("ESPP") for the purchase period of July 1, 2025 to September 30, 2025 (the "September ESPP Shares"), and (ii) 162 shares of Common Stock purchased pursuant to the ESPP for the purchase period of October 1, 2025 to December 31, 2025 (the "December ESPP Shares"). In accordance with the terms of the ESPP, the September ESPP Shares were purchased at a price equal to 85% of the closing price of Issuer's Common Stock on July 1, 2025 and the December ESPP Shares were purchased at a price equal to 85% of the closing price of the Issuer's Common Stock on October 1, 2025.