144 0001818526 XXXXXXXX LIVE 0001806837 Vertex, Inc. 001-39413 2301 RENAISSANCE BOULEVARD KING OF PRUSSIA PA 19406 (800) 355-3500 DeStefano David Officer Director Common Wells Fargo Advisors

1 N. Jefferson Ave St. Louis MO 63123

12177 365950.29 61673585 03/08/2024 Nasdaq Common 07/28/2021 Stock Vesting Issuer N 12177 07/28/2021 N/A N David J. Destefano

2301 RENAISSANCE BOULEVARD KING OF PRUSSIA PA 19406

Common- Vertex, Inc. 12/15/2023 39300 1066006.56 03/08/2024 David J. DeStefano