X0206 3 2021-06-09 0 0001600641 1stdibs.com, Inc. DIBS 0001237860 ROSENBLATT DAVID S 51 ASTOR PLACE, 3RD FLOOR NEW YORK NY 10003 1 1 0 0 Chief Executive Officer Common Stock 1421475 D Common Stock 615302 I By 2012 David Rosenblatt Family Trust dtd 11/30/2012 Employee Stock Option (right to buy) 3.87 2026-02-11 Common Stock 666666 D Employee Stock Option (right to buy) 4.56 2029-05-14 Common Stock 200000 D Employee Stock Option (right to buy) 9.45 2031-03-19 Common Stock 155000 D Employee Stock Option (right to buy) 9.45 2031-03-19 Common Stock 361666 D Option vests over four years with 1/48th of the shares vesting on each monthly anniversary of November 1, 2015, subject to the reporting person's continued service with the Issuer through the applicable vesting date. Option vests over four years with 1/48th of the shares vesting on each monthly anniversary of March 1, 2019, subject to the reporting person's continued service with the Issuer through the applicable vesting date. Option vests over four years with 1/48th of the shares vesting on each monthly anniversary of March 1, 2021, subject to the reporting person's continued service with the Issuer through the applicable vesting date. Option vests over four years, with 20.8333% of the shares vesting on January 1, 2022, and with 79.1667% of the shares vesting in 38 equal monthly installments thereafter, subject to the consummation of the Issuer's initial public offering and the reporting person's continued service with the Issuer through the applicable vesting date. Exhibit List: Exhibit 24 - Power of Attorney By: /s/ David S. Rosenblatt 2021-06-09