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About Alkermes Inc. plc (ALKS)

Alkermes plc, a biopharmaceutical company, researches, develops, and commercializes pharmaceutical products to address unmet medical needs of patients in therapeutic areas in the United States, Ireland, and internationally. It has a portfolio of proprietary commercial products for the treatment of alcohol dependence, opioid dependence, schizophrenia and bipolar I disorder and a pipeline of clinical and preclinical product candidates in development for neurological disorders. Its marketed products include ARISTADA, an intramuscular injectable suspension for the treatment of schizophrenia; ARISTADA INITIO for the treatment of schizophrenia in adults; VIVITROL for the treatment of alcohol and prevention of opioid dependence; and LYBALVI, an oral atypical antipsychotic drug candidate for the treatment of adults with schizophrenia and bipolar I disorder. The company also offers proprietary technology platforms to third parties to enable them to develop, commercialize, and manufacture products. It has collaboration agreements primarily with Janssen Pharmaceutica N.V., Janssen Pharmaceutica Inc, and Janssen Pharmaceutica International. Alkermes plc was founded in 1987 and is headquartered in Dublin, Ireland.

Ticker
ALKS
Exchange
XNAS
Sector
Healthcare
Industry
Drug Manufacturers - Specialty & Generic

Company profile updated October 10, 2026.

Stored market snapshot

As of October 8, 2026. Daily closing data may differ from the live quote shown in the dashboard.

Stored daily close (USD)
$40.11
Company market capitalization (USD)
$6,728,984,839.92
Price / earnings (TTM)
101.76×
Price / book
3.72×

Research ALKS

Compare the company’s price history and fundamentals in the dashboard. Explore disclosed trading and ownership activity in these research collections: