Washington – September 30, 2026 -- Vanda Pharmaceuticals Inc. (Nasdaq: VNDA) reported positive topline results from a pivotal Phase III study of HETLIOZ® (tasimelteon) 20 mg in adults with Delayed Sleep-Wake Phase Disorder (DSWPD), setting up a supplemental New Drug Application (sNDA) filing with the U.S. Food and Drug Administration (FDA).