X0306 4 2020-09-21 0 0001643269 Sumo Logic, Inc. SUMO 0001541539 Greylock XIII GP LLC 2550 SAND HILL ROAD, SUITE 200 MENLO PARK CA 94025 0 0 1 0 0001474746 Greylock XIII Limited Partnership 2550 SAND HILL ROAD, SUITE 200 MENLO PARK CA 94025 0 0 1 0 0001474747 Greylock XIII-A Limited Partnership 2550 SAND HILL ROAD, SUITE 200 MENLO PARK CA 94025 0 0 1 0 Common Stock 2020-09-21 4 C 0 16919622 A 16919622 I See footnote Common Stock 2020-09-21 4 C 0 1523268 A 1523268 I See footnote Common Stock 2020-09-21 4 C 0 541042 A 541042 I See footnote Series A Preferred Stock 2020-09-21 4 C 0 7771788 D Common Stock 7771788 0 I See footnote Series A Preferred Stock 2020-09-21 4 C 0 699692 D Common Stock 699692 0 I See footnote Series A Preferred Stock 2020-09-21 4 C 0 248520 D Common Stock 248520 0 I See footnote Series B Preferred Stock 2020-09-21 4 C 0 2828264 D Common Stock 2828264 0 I See footnote Series B Preferred Stock 2020-09-21 4 C 0 254628 D Common Stock 254628 0 I See footnote Series B Preferred Stock 2020-09-21 4 C 0 90440 D Common Stock 90440 0 I See footnote Series C Preferred Stock 2020-09-21 4 C 0 2542885 D Common Stock 2542885 0 I See footnote Series C Preferred Stock 2020-09-21 4 C 0 228935 D Common Stock 228935 0 I See footnote Series C Preferred Stock 2020-09-21 4 C 0 81314 D Common Stock 81314 0 I See footnote Series D Preferred Stock 2020-09-21 4 C 0 1629792 D Common Stock 1629792 0 I See footnote Series D Preferred Stock 2020-09-21 4 C 0 146730 D Common Stock 146730 0 I See footnote Series D Preferred Stock 2020-09-21 4 C 0 52116 D Common Stock 52116 0 I See footnote Series E Preferred Stock 2020-09-21 4 C 0 1654051 D Common Stock 1654051 0 I See footnote Series E Preferred Stock 2020-09-21 4 C 0 148914 D Common Stock 148914 0 I See footnote Series E Preferred Stock 2020-09-21 4 C 0 52892 D Common Stock 52892 0 I See footnote Series F Preferred Stock 2020-09-21 4 C 0 331020 D Common Stock 331020 0 I See footnote Series F Preferred Stock 2020-09-21 4 C 0 29801 D Common Stock 29801 0 I See footnote Series F Preferred Stock 2020-09-21 4 C 0 10585 D Common Stock 10585 0 I See footnote Series G Preferred Stock 2020-09-21 4 C 0 161822 D Common Stock 161822 0 I See footnote Series G Preferred Stock 2020-09-21 4 C 0 14568 D Common Stock 14568 0 I See footnote Series G Preferred Stock 2020-09-21 4 C 0 5175 D Common Stock 5175 0 I See footnote The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series F Preferred Stock and Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date. These shares are held of record by Greylock XIII Limited Partnership ("Greylock XIII LP"). Greylock XIII GP LLC ("Greylock XIII GP") is the sole General Partner of Greylock XIII LP and may be deemed to share voting and dispositive power with respect to the shares held by Greylock XIII LP. Greylock XIII GP disclaims beneficial ownership of the securities held by Greylock XIII LP except to the extent of any pecuniary interest therein and the inclusion of these securities in this report shall not be deemed an admission by Greylock XIII GP of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. These shares are held of record by Greylock XIII-A Limited Partnership ("Greylock XIII-A LP"). Greylock XIII GP is the sole General Partner of Greylock XIII-A LP and may be deemed to share voting and dispositive power with respect to the shares held by Greylock XIII-A LP. Greylock XIII GP disclaims beneficial ownership of the securities held by Greylock XIII-A LP except to the extent of any pecuniary interest therein and the inclusion of these securities in this report shall not be deemed an admission by Greylock XIII GP of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. These shares are held of record by Greylock XIII GP. /s/ Donald A. Sullivan, as Administrative Partner of Greylock XIII GP LLC 2020-09-21 /s/ Donald A. Sullivan, as Administrative Partner of Greylock XIII GP LLC, the general partner of Greylock XIII Limited Partnership 2020-09-21 /s/ Donald A. Sullivan, as Administrative Partner of Greylock XIII GP LLC, the general partner of Greylock XIII-A Limited Partnership 2020-09-21