X0306 4 2021-02-05 0 0001745041 IAA, Inc. IAA 0001669069 Carlson Christopher C/O IAA INC. TWO WESTBROOK CORPORATE CENTER, STE 500 WESTCHESTER IL 60154 0 1 0 0 VP and Corporate Controller Common Stock 2021-02-05 4 F 0 127 63.46 D 1677.4694 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 on February 5, 2020. Includes 64.7264 shares of the Issuer's common stock that were purchased by the Reporting Person under the Issuer's employee stock purchase plan since the last filing of a Form 4 by the Reporting Person. /s/ Sidney Peryar, as attorney-in-fact 2021-02-09