Exhibit 99.1 Supernus Announces Second Quarter 2024 Financial Results ® • Net sales of Qelbree increased 92% in the second quarter of 2024, compared to the same period in 2023. ◦ $59.4 million and $104.5 million of net sales in the second quarter and first six months of 2024, respectively. • Net sales of GOCOVRI increased 10% in the second quarter of 2024, compared to the same period in 2023. ® ◦ $31.7 million and $58.3 million of net sales in the second quarter and first six months of 2024, respectively. • ...