X0306 4 2021-06-17 0 0001745041 IAA, Inc. IAA 0001779258 Kastner Olaf TWO WESTBROOK CORPORATE CENTER SUITE 500 WESTCHESTER IL 60154 1 0 0 0 Common Stock 2021-06-17 4 F 0 227 53.95 D 4260 D Represents shares of common stock withheld by the Issuer to pay tax withholding obligations of the Reporting Person upon the vesting of restricted stock units previously granted to the Reporting Person. Olaf Kastner /s/ Sidney Peryar as attorney-in-fact 2021-06-21