X0306 4 2023-01-05 1 0001825480 Poshmark, Inc. POSH 0001573272 Mayfield XIII, a Cayman Islands Exempted Limited Partnership 2484 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001573274 Mayfield XIII Management (UGP), Ltd., a Cayman Islands Exempted Co. 2484 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001573273 Mayfield XIII Management (EGP), L.P., a Cayman Islands Exempted Limited Partnership 2484 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001667217 MAYFIELD SELECT, A CAYMAN ISLANDS EXEMPTED LIMITED PARTNERSHIP 2484 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001708788 Mayfield Select Management (UGP), Ltd. 2484 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001708789 Mayfield Select Management (EGP), L.P. 2484 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 Class B Common Stock 17.90 2023-01-05 4 U 0 15748793 0.00 D Class A Common Stock 15748793 0 I By Mayfield XIII, a Cayman Islands Exempted Limited Partnership Class B Common Stock 17.90 2023-01-05 4 U 0 1504854 0.00 D Class A Common Stock 1504854 0 I By Mayfield Select, a Cayman Islands Exempted Limited Partnership Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Persons and has no expiration date. Mayfield XIII Management (UGP), Ltd., a Cayman Islands Exempted Company, or MF XIII UGP, is the general partner of Mayfield XIII Management (EGP), L.P., a Cayman Islands Exempted Limited Partnership, which is the general partner of MF XIII, a Cayman Islands Exempted Limited Partnership, or MF XIII. Rajeev Batra, Navin Chaddha, and Vaneeta Varma are the directors of MF XIII UGP. As a result, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the shares owned by MF XIII, but each of the individuals disclaims such beneficial ownership. Mayfield Select Management (UGP), Ltd., a Cayman Islands Exempted Company, or MF Select UGP, is the general partner of Mayfield Select Management (EGP), L.P., a Cayman Islands Exempted Limited Partnership, which is the general partner of MF Select, a Cayman Islands Exempted Limited Partnership, or MF Select. Rajeev Batra, Navin Chaddha, and Urshit Parikh are the directors of MF Select UGP. As a result, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the shares owned by MF Select, but each of the individuals disclaims such beneficial ownership. Mayfield XIII, a Cayman Islands Exempted Limited Partnership By: Mayfield XIII Management (EGP), L.P., a Cayman Islands Exempted Limited Partnership, its general partner By: Mayfield XIII Management (UGP), Ltd., a Cayman Islands Exempted Company, its gene 2023-01-06 Mayfield XIII Management (EGP), L.P., a Cayman Islands Exempted Limited Partnership, By: Mayfield XIII Management (UGP), Ltd., a Cayman Islands Exempted Company, its general partner, By: /s/ Paul Kohli, Authorized Signatory 2023-01-06 Mayfield XIII Management (UGP), Ltd., a Cayman Islands Exempted Company, By: /s/ Paul Kohli, Authorized Signatory 2023-01-06 Mayfield Select, a Cayman Islands Exempted Limited Partnership, By: Mayfield Select Management (EGP), L.P., a Cayman Islands Exempted Limited Partnership, its general partner, By: Mayfield Select Management (UGP), Ltd., a Cayman Islands Exempted Company, 2023-01-06 Mayfield Select Management (EGP), L.P., a Cayman Islands Exempted Limited Partnership, By: Mayfield Select Management (UGP), Ltd., a Cayman Islands Exempted Company, its general partner, By: /s/ Paul Kohli, Authorized Signatory 2023-01-06 Mayfield Select Management (UGP), Ltd., a Cayman Islands Exempted Company, By: /s/ Paul Kohli, Authorized Signatory 2023-01-06