X0508 4 2023-12-04 0001600641 1stdibs.com, Inc. DIBS 0001305473 Insight Holdings Group, LLC C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 true 0001745334 Insight Venture Associates IX, L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 true 0001745335 Insight Venture Associates IX, Ltd. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 true 0001629399 Insight Venture Partners (Cayman) IX, L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 true 0001629396 Insight Venture Partners (Delaware) IX, L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 true 0001629402 Insight Venture Partners IX (Co-Investors), L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 true 0001629398 Insight Venture Partners IX, L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 true false Common Stock 2023-12-04 4 S 0 23196 4.3355 D 2864320 I See footnote Common Stock 2023-12-04 4 S 0 11526 4.3355 D 1423209 I See footnote Common Stock 2023-12-04 4 S 0 2458 4.3355 D 303472 I See footnote Common Stock 2023-12-04 4 S 0 463 4.3355 D 57175 I See footnote Common Stock 2023-12-05 4 S 0 14836 4.3154 D 2849484 I See footnote Common Stock 2023-12-05 4 S 0 7371 4.3154 D 1415838 I See footnote Common Stock 2023-12-05 4 S 0 1570 4.3154 D 301902 I See footnote Common Stock 2023-12-05 4 S 0 297 4.3154 D 56878 I See footnote See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 Exhibit List Exhibit 99.1 - Explanation of Responses Exhibit 99.2 - Joint Filers' Signatures Exhibit 99.3 - Joint Filer Information Insight Holdings Group, LLC, by Andrew Prodromos, its Authorized Signatory; By: /s/Andrew Prodromos 2023-12-05