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Horizon
What Does Horizon Do?
Horizon Therapeutics, now an Amgen company, is a global biotechnology company focused on the discovery, development, and commercialization of medicines that address critical needs for people impacted by rare, autoimmune, and severe inflammatory diseases. With a deep commitment to patients, Horizon strives to deliver innovative therapies that can meaningfully improve lives. The company's portfolio, now part of Amgen, targets conditions with high unmet medical needs, leveraging scientific expertise and a patient-centric approach. Its acquisition by Amgen was completed in October 2023, aiming to broaden the reach of its important medicines.
Where Is Horizon's Headquarters?
HQ Function
Serves as the global headquarters, historically overseeing international operations, strategic direction, and corporate functions. Following the Amgen acquisition, its role is integrated within Amgen's global structure.
Notable Features:
Modern office facility located in Dublin's prominent Docklands area, designed to support global operations and foster collaboration. Likely equipped with advanced technology for international communication.
Work Culture:
Prior to its acquisition, Horizon was known for a fast-paced, patient-focused, and innovative culture. Employees were driven by a mission to make a difference in the lives of those with rare and challenging diseases. This cultural DNA is now being integrated with Amgen's values.
HQ Significance:
The Dublin headquarters symbolized Horizon's global reach and its status as a significant international biopharmaceutical company. Its location in Ireland also offered strategic advantages for European and global business operations.
Values Reflected in HQ: The headquarters aimed to reflect Horizon's commitment to global impact, innovation in medicine, and a modern, forward-thinking approach to biotechnology.
Location:
Prior to its acquisition by Amgen, Horizon Therapeutics had a robust global presence, anchored by its global headquarters in Dublin, Ireland, and significant U.S. operations in Deerfield, Illinois. The company operated manufacturing facilities and extended its commercial reach across North America, Europe, and other key international markets. Globally supported functions included research and development, clinical trials management, manufacturing and supply chain logistics, commercial operations, and comprehensive patient support programs for its specialized medicines. This established global infrastructure is now integrated into Amgen's extensive worldwide operations.
Street Address:
70 Sir John Rogerson's Quay, Dublin 2
City:
Dublin
State/Province:
Co. Dublin
Country:
Ireland
Where Else Does Horizon Operate Around the World?
Deerfield, Illinois, USA
Address: 1 Horizon Way, Deerfield, IL 60015, USA
Drove U.S. strategy, clinical development, regulatory affairs, patient engagement, and market access for Horizon's portfolio of medicines for rare and autoimmune diseases. Now functions as part of Amgen's U.S. operations.
Waterford, Ireland
Address: IDA Industrial Estate, Butlerstown North, Co. Waterford, Ireland
Supports the global supply of Horizon's therapies, ensuring quality manufacturing and timely delivery to patients worldwide, contributing to the company's end-to-end pharmaceutical operations. Now part of Amgen's manufacturing network.
Buying Intent Signals for Horizon
Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.
Who's Leading Horizon? Meet the Executive Team
As of April 2025, Horizon' leadership includes:
Who's Investing in Horizon?
Horizon has been backed by several prominent investors over the years, including:
What Leadership Changes Has Horizon Seen Recently?
The most significant executive event for Horizon Therapeutics in the last 12 months was its acquisition by Amgen, finalized in October 2023. This event led to the departure of most of Horizon's top C-suite executives as the company began its integration into Amgen's structure. Consequently, there were no major new external hires into Horizon's standalone executive team in the period leading up to or immediately following the acquisition's close; leadership of Horizon's assets and operations transitioned under Amgen.
Departures
New Appointments:
What Technology (Tech Stack) Is Used byHorizon?
Discover the tools Horizon uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
Horizon Email Formats and Examples
Prior to its acquisition by Amgen, Horizon Therapeutics likely utilized standard corporate email formats. A common structure observed for many companies is the first initial followed by the last name. For example, Jane Smith might be jsmith@horizontherapeutics.com. Other potential formats could include firstname.lastname@horizontherapeutics.com. With the integration into Amgen, employee email addresses will transition to Amgen's standard format for ongoing communications.
[first_initial][last]@horizontherapeutics.com
Format
jsmith@horizontherapeutics.com
Example
70%
Success rate
What's the Latest News About Horizon?
Amgen Newsroom • October 6, 2023
Amgen Completes Acquisition of Horizon Therapeutics plc
Amgen announced it has successfully completed its acquisition of Horizon Therapeutics plc for $116.50 per share in cash, valuing the transaction at approximately $27.8 billion. This acquisition significantly expands Amgen's portfolio with several first-in-class, early-in-lifecycle medicines for rare inflammatory diseases....more
Federal Trade Commission (FTC) • September 1, 2023
FTC Clears Amgen’s $27.8 Billion Acquisition of Horizon Therapeutics, Imposing Strict Limitations on Anticompetitive Bundling
The U.S. Federal Trade Commission (FTC) issued a final order allowing Amgen's acquisition of Horizon Therapeutics to proceed, subject to conditions preventing Amgen from leveraging its product portfolio to disadvantage rivals to Horizon's key drugs, TEPEZZA and KRYSTEXXA....more
Amgen Investor Relations (Q4 2023 Earnings) • February 6, 2024
Amgen Reports Strong Performance of Former Horizon Drugs in First Post-Acquisition Earnings
In its Q4 2023 financial results, Amgen highlighted the strong sales performance of key medicines acquired from Horizon Therapeutics, including TEPEZZA, KRYSTEXXA, UPLIZNA, and VIMPAT. The company noted these products contributed significantly to revenue growth and affirmed the strategic rationale behind the acquisition....more
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