X0306 4 2021-06-01 0 0001643269 Sumo Logic, Inc. SUMO 0001278477 CAREY SYDNEY 305 MAIN STREET REDWOOD CITY CA 94063 0 1 0 0 Chief Financial Officer Common Stock 2021-06-01 4 S 0 10602 18.751 D 423794 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on January 6, 2021. This sale price represents the weighted average sale price of the shares sold ranging from $18.395 to $19.20 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. Certain of these shares are represented by previously reported Restricted Stock Units ("RSU"). 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 2021-06-03