144 0001818526 XXXXXXXX LIVE 0001806837 Vertex Inc 001-39413 2301 Renaissance Blvd King of Prussia PA 19406 800-355-3500 David DeStefano director Common Merrill Lynch 724 West Lancaster Ave Suite 100 Wayne PA 19087 6460 82365 79661290 05/28/2026 NASDAQ Common 02/29/2024 Retsricted Stock Unit Lapsed Vertex Inc N 26649 02/29/2024 Shares Withheld Y 6460 shares were sold by the 2023 David DeStefano Dynasty Trust FBO Eric DeStefano. David's Spouse Linda DeStefano is co-trustee with son Eric DeStefano 05/28/2026 David DeStefano