Horizon Therapeutics plc

Irelandhorizontherapeutics.com

Horizon Therapeutics plc is an Irish-domiciled biopharmaceutical company focused on the discovery, development, and commercialization of medicines addressing critical needs in rare, autoimmune, and severe inflammatory diseases.

Founded in 2005 and headquartered in Dublin, Ireland, with operational headquarters in Lake Forest, Illinois, the company developed therapies such as Tepezza (teprotumumab) for thyroid eye disease, Krystexxa (pegloticase) for refractory gout, and treatments for conditions like cystinosis and urea cycle disorders. Its portfolio also included products for rheumatology and inflammation, including Duexis, Pennsaid, and Rayos.

Acquired by Amgen Inc. in October 2023 for approximately $27.8 billion, Horizon operates as a subsidiary, contributing to Amgen's rare disease portfolio with around 2,190 employees and 2022 revenues of $3.6 billion prior to the acquisition.

Latest news on Horizon Therapeutics

7 June 2026
Amgen: Repatha (evolocumab) cuts first major CV events 29% in high‑risk diabetes subgroup

VESALIUS‑CV subgroup shows evolocumab lowers first major cardiovascular events and LDL‑C; real‑world GLP‑1 persistence is low, curbing potential benefits.

19 May 2026
Amgen CFO Peter Griffith to retire; Thomas Dittrich named CFO

Successor returns July 1 as EVP and assumes CFO duties Sept 1; outgoing CFO stays through Jan 2027 to aid transition. Successor has 30+ yrs finance leadership, ex‑CFO at Galderma, Shire, Sulzer.

4 May 2026
Amgen invests $300M more in U.S. manufacturing, nearly $2B over past year

Expands Puerto Rico biologics facility to boost U.S. production, deploy next‑gen technologies, support workforce development and construction jobs, and strengthen medicine supply‑chain resilience

22 April 2026
Amgen EVP & CTO David M. Reese to retire

Reese retires June 30, 2026. Effective June 1, leadership reshuffle: James Bradner named EVP R&D, AI & Data; Sean Bruich CTO; Murdo Gordon EVP Global Markets & Policy; Paul Burton remains CMO.

28 March 2026
Amgen: Repatha cuts first major cardiovascular events 31% in high‑risk patients without significant atherosclerosis

VESALIUS‑CV subgroup (3,655 high‑risk diabetics without known atherosclerosis) showed a 31% reduction in first major CV events vs placebo; median LDL‑C 44 mg/dL over ~4.8 years.