Exhibit 99.1 HARMONY BIOSCIENCES REPORTS Q1 FINANCIAL RESULTS AND CONFIRMS 2026 NET REVENUE GUIDANCE OF OVER $1 BILLION; REINFORCES 2026 STRATEGIC PRIORITIES WAKIX® Net Revenue Grew 17% to $215.4 Million for First Quarter 2026; On Track for Full Year 2026 Net Revenues over $1 Billion Continue to Vigorously Protect WAKIX IP into 2030; Filed Suit Against AET Pharma/Sandoz Regarding Infringement of Amorphous Pitolisant Patent Lifecycle Management Advancing with Pitolisant GR on Track for NDA Filing 2Q26, Pitol ...