 HOUSTON, TX ACCESSWIRE April 29, 2021 Vertex Energy, Inc. NASDAQ:VTNR, Vertex or the Company, a leading specialty refiner and marketer of high-purity petroleum-based products, today announced that it will issue first quarter 2021 financial results before the market opens on May 13, 2021. A conference call will be held that same day at 9:00 A.M. 