Overview of the Deal

Acquirer: Amgen Inc. Target: Horizon Therapeutics plc Total Transaction Size: Approximately $27.8 billion Offer Details: $116.50 per share in cash Announcement Date: December 12, 2022 Completion Date: October 6, 2023 Target Advisors: Not publicly disclosed Acquirer Advisors: Not publicly disclosed

On December 12, 2022, Amgen Inc. announced a definitive agreement to acquire Horizon Therapeutics plc for $116.50 per share in cash, totaling approximately $27.8 billion. The transaction received the necessary regulatory approvals and was completed on October 6, 2023, making Horizon a wholly owned subsidiary of Amgen.

Company Details (Acquirer – Amgen Inc.)

Amgen Inc. is a leading global biotechnology company committed to discovering, developing, and delivering innovative human therapeutics.

Company Details (Target – Horizon Therapeutics plc)

Horizon Therapeutics plc is a biopharmaceutical company focused on researching, developing, and commercializing medicines that address critical needs for people impacted by rare and rheumatic diseases.

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