How many employees work at Alexion Pharmaceuticals?

Alexion Pharmaceuticals, Inc. has 7,323 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 4.3%.

Data source: Revelio Labs Coverage: Global workforce Latest update: September 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 September 2025

Alexion Pharmaceuticals
workforce metrics

Headcount

7.3k

Avg. Salary

$143k

Tenure

3.5yr

Growth Rate

4.3%

Hiring Rate

Attrition Rate

For even more metrics data,
reach out to our sales team.

Contact Sales

Employee Headcount

Interactive chart of Alexion Pharmaceuticals annual worldwide employee count from 2023 to 2025.

  • Alexion Pharmaceuticals total number of employees in 2025 was 7,448.844, a 4.3% increase from 2024.
  • Alexion Pharmaceuticals total number of employees in 2024 was 7,081.946, a 4.9% increase from 2023.
  • Alexion Pharmaceuticals total number of employees in 2023 was 6,748.268, a 8.9% increase from 2022.

Would you like to see the latest employee headcount data?

Talk to Sales

Employee Geographic Breakdown

Would you like to see the latest employee geographic data?

Talk to Sales

Employee Role Breakdown

Would you like to see the latest employee role breakdown data?

Talk to Sales

Employee Compensation

Would you like to see the latest employee compensation data?

Talk to Sales

Active Job Postings

Interactive chart of Alexion Pharmaceuticals annual active job postings from 2023 to 2025.

  • Alexion Pharmaceuticals active job postings in 2025 was 719, a 2.7% decline from 2024.
  • Alexion Pharmaceuticals active job postings in 2024 was 487, a 80.1% decline from 2023.
  • Alexion Pharmaceuticals active job postings in 2023 was 1,138, a 43.3% decline from 2022.

Would you like to see the latest active job postings data?

Talk to Sales

Employee Sentiment

Sentiment Topics

Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales
Contact Sales

Would you like to see the latest employee sentiment data?

Talk to Sales