– Event to be webcast live on Monday, May 11, 2026, at 5:30 a.m. PT –

SAN DIEGO, May 8, 2026 /PRNewswire/ -- Inhibrx Biosciences, Inc. (NASDAQ:INBX) ("Inhibrx" or the "Company"), a clinical-stage biopharmaceutical company focused on developing therapeutics for oncology and rare diseases, today announced that it will host a live webcast presentation on Monday, May 11, 2026 at 5:30 a.m. Pacific Time to provide interim results from the randomized, first-line Phase 2 portion of the HexAgon study, which is evaluating the safety and efficacy of INBRX-106, a hexavalent OX40 agonist, in combination with pembrolizumab (the combination arm) versus pembrolizumab monotherapy (the control arm) in first-line patients with treatment-naïve, PD-L1 positive (CPS ≥ 20) metastatic or unresectable recurrent Head and Neck Squamous Cell Carcinoma (HNSCC).