X0306 4 2022-03-15 0 0001643269 Sumo Logic, Inc. SUMO 0001822439 Haar Katherine 305 MAIN STREET REDWOOD CITY CA 94063 0 1 0 0 General Counsel and Secretary Common Stock 2022-03-15 4 S 0 4674 8.956 D 188464 D Common Stock 12500 I See footnote Shares sold to cover tax obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale price represents the weighted average sale price of the shares sold ranging from $8.94 to $8.968 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 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. These shares are held by Katherine I. Haar, as Trustee of the Katherine I. Haar Revocable Trust dated 7/9/19. /s/ Katherine Haar 2022-03-17