How many employees work at Alexion Pharmaceuticals?
Alexion Pharmaceuticals, Inc. has 6,795 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 5.5%.
Data source: Revelio Labs Coverage: Global workforce Latest update: December 2025
About Alexion Pharmaceuticals
Our mission is to transform the lives of people living with rare diseases and devastating conditions through the development and delivery of innovative medicines, as well as through supportive technologies and healthcare services. By continuing to deepen our understanding of rare disease, which began with our pioneering work in complement biology, we are able to innovate and evolve into new areas where there is great unmet need and opportunity to help patients and families fully live their best lives. Our culture is rooted in integrity, inclusiveness, and our dedication to joining and supporting the communities in which we live and work. We invest in and value people who believe in the importance of our purpose and understand what it takes to deliver on it. Alexion has over 3,000 talented colleagues dedicated to serving people living with rare diseases in more than 50 countries around the world. Our global headquarters are based in Boston, Massachusetts and our EMEA headquarters are in Zürich, Switzerland. We also have a Research Center of Excellence in New Haven, Connecticut, global supply chain and operations headquarters in Ireland, as well as local and regional operations in countries around the world. At Alexion, our passion drives us to continuously innovate and create meaningful value in all we do. In doing so, we change lives for the better – ours, people living with rare diseases, and the communities we serve. Every day. Community Guidelines: https://bit.ly/39x9gqy
As of December 2025
Alexion Pharmaceuticals
workforce metrics
Headcount
6.8k
Avg. Salary
$144.2k
Tenure
3.3yr
Growth Rate
5.5%
Hiring Rate
Attrition Rate
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Employee Headcount
Interactive chart of Alexion Pharmaceuticals annual worldwide employee count from 2023 to 2025.
- Alexion Pharmaceuticals total number of employees in 2025 was 6,794, a 5.5% increase from 2024.
- Alexion Pharmaceuticals total number of employees in 2024 was 6,430, a 4.6% increase from 2023.
- Alexion Pharmaceuticals total number of employees in 2023 was 6,140, a 9.4% increase from 2022.
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Employee Geographic Breakdown
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Active Job Postings
Interactive chart of Alexion Pharmaceuticals annual active job postings from 2023 to 2025.
- Alexion Pharmaceuticals active job postings in 2025 was 201, a 33.7% increase from 2024.
- Alexion Pharmaceuticals active job postings in 2024 was 143, a 92.9% decline from 2023.
- Alexion Pharmaceuticals active job postings in 2023 was 391, a 34.3% decline from 2022.
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Employee Sentiment
Sentiment Topics
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