Business Organization

9 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Business Organization

Business Organization

Supernus Pharmaceuticals, Inc. (the Company, see Consolidation in Note 2, Summary of Significant Accounting Policies) is a biopharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. The Company's diverse neuroscience portfolio includes approved treatments for attention-deficit hyperactivity disorder (ADHD), dyskinesia in Parkinson's Disease (PD) patients receiving levodopa-based therapy, hypomobility in PD, postpartum depression (PPD), epilepsy, migraine, cervical dystonia, and chronic sialorrhea. The Company is developing a broad range of novel CNS product candidates including new potential treatments for epilepsy, depression, and other CNS disorders.

The Company has nine commercial products that it markets: Qelbree®, GOCOVRI®, Oxtellar XR®, Trokendi XR®, APOKYN®, XADAGO®, MYOBLOC® , ONAPGOTM (formerly known as SPN-830), and ZURZUVAE® (see Note 3, Sage Acquisition). In February 2025, the FDA approved ONAPGO (apomorphine hydrochloride) injection as the first and only subcutaneous apomorphine infusion device for the treatment of motor fluctuations in adults with advanced PD. ONAPGO was launched in April 2025. In September 2025, the Federal Drug Administration (FDA) withdrew the New Drug Application (NDA) for OSMOLEX ER.

Acquisition of Sage Therapeutics, Inc. and Reorganization

On June 13, 2025, the Company entered into an Agreement and Plan of Merger (Merger Agreement) to acquire Sage Therapeutics, Inc. (Sage). The acquisition closed on July 31, 2025.

Sage was a pharmaceutical company with a portfolio of product candidates to address a range of neurological diseases and a commercial product to treat PPD. Sage's commercialized product, ZURZUVAE® (zuranolone) capsules, is the first and only FDA-approved oral medicine indicated for the treatment of postpartum depression in adults. As of July 31, 2025, Sage became a wholly-owned subsidiary of the Company. With the acquisition of Sage, the Company acquired the rights to further develop and market ZURZUVAE. Through a collaboration agreement with Biogen MA Inc. (BIMA) and Biogen International GmbH (together with BIMA, "Biogen"), the Company reports collaboration revenue that is 50% of total net revenue recorded by Biogen for ZURZUVAE in the U.S. See Note 3, Sage Acquisition, for further details on the acquisition and Note 15, Collaboration Agreements, for further details on the collaboration agreement with Biogen.

Following the Sage Acquisition, during the third quarter of 2025, Sage Therapeutics, Inc. was reorganized into Sage Therapeutics, LLC.