SUPN · Analysis updated Nov 10, 2026, 6:00 PM ET

Why is Supernus, Inc. Common Stock (SUPN) stock moving?

SUPN closed at $28.75 on Nov 10, up about 4% on the day, after a volatile stretch since the Nov 2 merger close. The stock spiked to a $31.62 high on Nov 3, the first session as the combined company, then fell to a $26.16 close on Nov 6 before recovering. Volume was heavy from Oct 29 to Nov 6, peaking at 9.05M shares on Nov 3, and fell to 2.78M on Nov 10, which suggests the initial merger-driven trading is fading. The 30-day range is $25.92 to $31.62.

News behind the analysis

About Supernus, Inc. Common Stock

Healthcare · Pharmaceuticals (central nervous system)

Supernus, Inc. is a drugmaker focused on central nervous system conditions. It was formed on November 2, 2026, when Supernus Pharmaceuticals and Indivior Pharmaceuticals completed a merger of equals, and it began trading under SUPN on November 3, 2026. The combination puts Supernus's ADHD, Parkinson's and epilepsy medicines together with Indivior's opioid-addiction treatments.

How it makes money

The company makes money by selling prescription brand-name drugs, mostly in the US. Before the merger, Supernus's sales came from Qelbree (a non-stimulant ADHD drug and its largest growth product), GOCOVRI for Parkinson's (about $43 million in Q3 2026), the epilepsy drugs Trokendi XR and Oxtellar XR (which now face generic competition), the Apokyn Parkinson's product, and Zurzuvae for postpartum depression, which came with the Sage Therapeutics acquisition. Total Q3 2026 revenue was a record of about $227 million. Indivior adds buprenorphine-based opioid use disorder treatments, mainly Sublocade, a monthly injection, along with Suboxone film. The split of revenue across the combined company had not been reported yet.

What usually moves SUPN

Similar companies

JAZZ, ACAD, AXSM, NBIX, ALKS

All stock analyses · Stock market today

This analysis is for informational purposes only and is not investment advice. It is based solely on the news and market data provided, and it does not guarantee future performance.