X0306 4 2021-06-14 0 0001600641 1stdibs.com, Inc. DIBS 0001190193 SPURLOCK STEVEN M 2965 WOODSIDE ROAD WOODSIDE CA 94062 0 0 1 0 0001190192 BALKANSKI ALEXANDRE 2965 WOODSIDE ROAD WOODSIDE CA 94062 0 0 1 0 0001183234 KAGLE ROBERT 2965 WOODSIDE ROAD WOODSIDE CA 94062 0 0 1 0 0001190211 DUNLEVIE BRUCE 2965 WOODSIDE ROAD WOODSIDE CA 94062 0 0 1 0 0001219230 FENTON PETER H 2965 WOODSIDE ROAD WOODSIDE CA 94062 0 0 1 0 0001190191 GURLEY J WILLIAM 2965 WOODSIDE ROAD WOODSIDE CA 94062 0 0 1 0 0001190213 HARVEY KEVIN 2965 WOODSIDE ROAD WOODSIDE CA 94062 0 0 1 0 0001091435 LASKY MITCHELL 2965 WOODSIDE ROAD WOODSIDE CA 94062 0 0 1 0 Common Stock 2021-06-14 4 C 0 7220666 A 7220666 I See footnotes Common Stock 2021-06-14 4 C 0 87166 A 87166 I See footnotes Series A Preferred Stock 2021-06-14 4 C 0 7220666 0.00 D Common Stock 7220666 0 I See footnotes Series B Preferred Stock 2021-06-14 4 C 0 87166 0.00 D Common Stock 87166 0 I See footnotes The Issuer's Series A Preferred Stock converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "IPO"). The shares are held directly by (i) Benchmark Capital Partners V, L.P. ("BCP V") for itself and as nominee for Benchmark Founders' Fund V, L.P. ("BFF V"), Benchmark Founders' Fund V-A, L.P. ("BFF V-A"), Benchmark Founders' Fund V-B, L.P. ("BFF V-B") and related individuals and (ii) Benchmark Capital Partners VII, L.P. ("BCP VII") for itself and as nominee for Benchmark Founders' Fund VII, L.P. ("BFF VII") and Benchmark Founders' Fund VII-B, L.P. ("BFF VII-B"). Benchmark Capital Management Co. V, L.L.C. ("BCMC V"), the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Benchmark Capital Management Co. VII, L.L.C. ("BCMC VII"), the general partner for BCP VII, BFF VII and BFF VII-B may be deemed to have sole voting and dispositive power over the securities. (Continued from Footnote 2) Alexandre Balkanski, Robert C. Kagle, Bruce W. Dunlevie, Peter H. Fenton, J. William Gurley, Kevin R. Harvey, Mitchell H. Lasky and Steven M. Spurlock are the managing members of BCMC V, and each of them may be deemed to share voting and dispositive power over the securities held by such entities. Matthew R. Cohler, a member of the Issuer's board of directors, Bruce W. Dunlevie, Peter H. Fenton, J. William Gurley, Kevin R. Harvey, Mitchell H. Lasky and Steven M. Spurlock are the managing members of BCMC VII, and each of them may be deemed to share voting and dispositive power over the securities held by such entities. Each such person and entity disclaims the existence of a "group" and disclaims beneficial ownership of the securities, except to the extent of such person's or entity's pecuniary interest in such securities. Consists of 3,610,333 shares held of record by BCP V and 3,610,333 shares held of record by BCP VII. The Issuer's Series B Preferred Stock converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's IPO. Consists of 43,583 shares held of record by BCP V and 43,583 shares held of record by BCP VII. This report is one of three reports, each on a separate Form 3, but relating to the same holdings being filed by entities affiliated with Benchmark and their applicable members. The filing of this statement shall not be deemed an admission that the reporting person is, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owner of any equity securities covered by this statement. By: /s/ An-Yen Hu, by power of attorney for Steven M. Spurlock 2021-06-16 By: /s/ An-Yen Hu, by power of attorney for Alexandre Balkanski 2021-06-16 By: /s/ An-Yen Hu, by power of attorney for Robert C. Kagle 2021-06-16 By: /s/ An-Yen Hu, by power of attorney for Bruce W. Dunlevie 2021-06-16 By: /s/ An-Yen Hu, by power of attorney for Peter H. Fenton 2021-06-16 By: /s/ An-Yen Hu, by power of attorney for J. William Gurley 2021-06-16 By: /s/ An-Yen Hu, by power of attorney for Kevin R. Harvey 2021-06-16 By: /s/ An-Yen Hu, by power of attorney for Mitchell H. Lasky 2021-06-16