X0306 4 2021-12-21 0 0001643269 Sumo Logic, Inc. SUMO 0001822781 Chettiar Suku Krishnaraj 305 MAIN STREET REDWOOD CITY CA 94063 0 1 0 0 Chief Marketing Officer Common Stock 2021-12-21 4 S 0 8750 13.815 D 401672 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. Certain of these shares are represented by previously reported RSUs. Each RSU represents the Reporting Person's right to receive one share of Common Stock of the Issuer subject to the applicable vesting schedule and the Reporting Person continuing to be a Service Provider through each such date. /s/ Katherine Haar, Attorney-in-fact 2021-12-22