Two founding directors to leave Ingevity board; board reduced from 11 to 9 members

Ingevity Corp

Daniel F. Sansone and Jean S. Blackwell will not stand for re-election at 2026 Annual Meeting.
Sansone departure due to mandatory retirement age policy; Blackwell after 10 years of service.
Board size decreased from 11 to 9 directors effective after the 2026 Annual Meeting.
Both departures are not due to any disagreement with the company on operations or policies.
Transition is described as normal board refreshment consistent with portfolio optimization.

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