Exhibit 99.1 Vertex Announces Third Quarter 2024 Financial Results KING OF PRUSSIA, PA – November 6, 2024: Vertex, Inc. (NASDAQ: VERX) ("Vertex" or the "Company"), a leading global provider of indirect tax solutions, today announced financial results for its third quarter ended September 30, 2024. "The third quarter of 2024 was another great quarter for Vertex", stated David DeStefano, Vertex's President, Chief Executive Officer and Chairperson of the Board. "Revenue was above the high end of our quarterly ...