X0306 4 2021-11-09 0 0001484778 ThredUp Inc. TDUP 0001852962 Upfront GP IV, L.P. 1314 7TH STREET, SUITE 600 SANTA MONICA CA 90401 0 0 1 0 0001853198 Upfront IV, L.P. 1314 7TH STREET, SUITE 600 SANTA MONICA CA 90401 0 0 1 0 0001686789 Upfront IV Ancillary, L.P. 1314 7TH STREET, SUITE 600 SANTA MONICA CA 90401 0 0 1 0 0001852952 Upfront IV Ancillary GP, LLC 1314 7TH STREET, SUITE 600 SANTA MONICA CA 90401 0 0 1 0 0001852959 Upfront Growth GP I, LLC 1314 7TH STREET, SUITE 600 SANTA MONICA CA 90401 0 0 1 0 0001852958 Upfront Growth I, L.P. 1314 7TH STREET, SUITE 600 SANTA MONICA CA 90401 0 0 1 0 0001852954 Upfront Growth GP II, LLC 1314 7TH STREET, SUITE 600 SANTA MONICA CA 90401 0 0 1 0 0001852953 Upfront Growth II, L.P. 1314 7TH STREET, SUITE 600 SANTA MONICA CA 90401 0 0 1 0 Class A Common Stock 2021-11-09 4 C 0 371973 0.00 A 371973 I By Upfront Growth I, L.P. Class A Common Stock 2021-11-09 4 C 0 557960 0.00 A 557960 I By Upfront Growth II, L.P. Class A Common Stock 2021-11-09 4 C 0 1201169 0.00 A 1201169 I By Upfront IV L.P. Class A Common Stock 2021-11-09 4 C 0 68898 0.00 A 68898 I By Upfront IV Ancillary, L.P. Class A Common Stock 2021-11-09 4 J 0 338157 0.00 D 33816 I By Upfront Growth I, L.P. Class A Common Stock 2021-11-09 4 J 0 507236 0.00 D 50724 I By Upfront Growth II, L.P. Class A Common Stock 2021-11-09 4 J 0 1091972 0.00 D 109197 I By Upfront IV L.P. Class A Common Stock 2021-11-09 4 J 0 62635 0.00 D 6263 I By Upfront IV Ancillary, L.P. Class A Common Stock 2021-11-09 4 J 0 28023 0.00 A 28023 I By Upfront Growth GP I, LLC Class A Common Stock 2021-11-09 4 J 0 28023 0.00 D 0 I By Upfront Growth GP I, LLC Class A Common Stock 2021-11-09 4 J 0 15218 0.00 A 15218 I Upfront Growth GP II, LLC Class A Common Stock 2021-11-09 4 J 0 15218 0.00 D 0 I Upfront Growth GP II, LLC Class A Common Stock 2021-11-09 4 J 0 266133 0.00 A 266133 I Upfront GP IV, L.P. Class A Common Stock 2021-11-09 4 J 0 266133 0.00 D 0 I Upfront GP IV, L.P. Class A Common Stock 2021-11-09 4 J 0 626 0.00 A 626 I Upfront IV Ancillary GP, LLC Class A Common Stock 2021-11-09 4 J 0 626 0.00 D 0 I Upfront IV Ancillary GP, LLC Class B Common Stock 2021-11-09 4 C 0 371973 0.00 D Class A Common Stock 371973 1170754 I By Upfront Growth I, L.P. Class B Common Stock 2021-11-09 4 C 0 557960 0.00 D Class A Common Stock 557960 1756131 I By Upfront Growth II, L.P. Class B Common Stock 2021-11-09 4 C 0 1201169 0.00 D Class A Common Stock 1201169 3780579 I By Upfront IV L.P. Class B Common Stock 2021-11-09 4 C 0 68898 0.00 D Class A Common Stock 68898 216851 I By Upfront IV Ancillary, L.P. Each share of Class B Common Stock was converted into one share of Class A Common Stock at the option of the holder in connection with the distributions described herein. Upfront Growth GP I, LLC is the general partner of Upfront Growth I, L.P. ("Upfront Growth I"). Upfront Growth GP II, LLC is the general partner of Upfront Growth II, L.P. ("Upfront Growth II"). Upfront GP IV, L.P. is the general partner of Upfront IV, L.P. ("Upfront IV"). Upfront IV Ancillary GP, LLC is the general partner of Upfront IV Ancillary, L.P. ("Upfront IV Ancillary," and together with Upfront Growth I, Upfront Growth II and Upfront IV, the "Upfront Entities"). The Upfront Entities are managed by Upfront Ventures Management, LLC, which is controlled by Mark Suster and Yves Sisteron. Each of the Upfront Entities, their respective general partners, Upfront Ventures Management, LLC and Messrs. Suster and Sisteron disclaims beneficial ownership of the shares reported herein except to the extent of his or its respective pecuniary interest therein. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Upfront Growth I to its general partner and limited partners without additional consideration. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Upfront Growth II to its general partner and limited partners without additional consideration. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Upfront IV to its general partner and limited partners without additional consideration. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Upfront IV Ancillary to its general partner and limited partners without additional consideration. Represents receipt of shares in the distribution in kind described in footnote (3). Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Upfront Growth GP I, LLC to its members without consideration. Represents receipt of shares in the distribution in kind described in footnote (4). Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Upfront Growth GP II, LLC to its members without consideration. Represents receipt of shares in the distribution in kind described in footnote (5). Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Upfront GP IV, L.P. to its general partner and limited partners without consideration. Represents receipt of shares in the distribution in kind described in footnote (6). Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Upfront IV Ancillary GP, LLC to its members without consideration. Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and upon the occurrence of other events set forth in the Issuer's Certificate of Incorporation. 1 of 2: The number of joint filers exceeds the EDGAR maximum of 10 joint filers per Form. This Form 4 is being filed in conjunction with a Form 4 being filed by Upfront Ventures Management, LLC and other filing persons. Upfront GP IV, L.P., By: Upfront Ventures Management, Inc, its general partner, By: Upfront Ventures Management, LLC, its sole stockholder, By: /s/ Dana Kibler, Chief Financial Officer 2021-11-12 Upfront IV, L.P., By: Upfront GP IV, L.P., its general partner, By: Upfront Ventures Management, Inc, its general partner, By: Upfront Ventures Management, LLC, its sole stockholder, By /s/ Dana Kibler, Chief Financial Officer 2021-11-12 Upfront IV Ancillary, L.P., By: Upfront IV Ancillary GP, LLC, its general partner, By: Upfront Ventures Management, LLC, its managing member, By /s/ Dana Kibler, Chief Financial Officer 2021-11-12 Upfront IV Ancillary GP, LLC, By: Upfront Ventures Management, LLC, its managing member, By /s/ Dana Kibler, Chief Financial Officer 2021-11-12 Upfront Growth GP I, LLC, By: Upfront Ventures Management, LLC, its managing member, By /s/ Dana Kibler, Chief Financial Officer 2021-11-12 Upfront Growth I, L.P., By: Upfront Growth GP I, LLC, its general partner, By: Upfront Ventures Management, LLC, its managing member, By /s/ Dana Kibler, Chief Financial Officer 2021-11-12 Upfront Growth GP II, LLC, By: Upfront Ventures Management, LLC, its managing member, By /s/ Dana Kibler, Chief Financial Officer 2021-11-12 Upfront Growth II, L.P., By: Upfront Growth GP II, LLC, its general partner, By: Upfront Ventures Management, LLC, its managing member, By /s/ Dana Kibler, Chief Financial Officer 2021-11-12