X0306 4 2021-06-14 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 2021-06-14 4 M 0 1800 1.38 A 139434 D Common Stock 2021-06-14 4 S 0 1800 22.003 D 137634 D Stock Option (right to buy) 1.38 2021-06-14 4 M 0 1800 0.00 D 2025-09-16 Common Stock 1800 425200 D 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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on January 8, 2021. This sale price represents the weighted average sale price of the shares sold ranging from $22.00 to $22.02 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The shares underlying this option are fully vested and immediately exercisable. /s/ Katherine Haar, Attorney-in-fact 2021-06-16