Management Change/Compensation (Form 8-K)

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On July 20, 2025, Jill Larsen resigned from the Board of Directors (the "Board") of Definitive Healthcare Corp. (the "Company") and as a member and Chair of the Human Capital Management and Compensation Committee (the "Compensation Committee") of the Board, effective July 21, 2025. Ms. Larsen's resignation was related to increased responsibilities at her present employer and was not the result of any disagreements with the Company relating to the Company's operations, policies or practices. In connection with Ms. Larsen's resignation, the size of the Board was reduced from 10 members to 9 members.

In addition, the Board appointed Scott Stephenson as a member and Chair of the Compensation Committee.