How many employees work at Alnylam Pharmaceuticals?

Alnylam Pharmaceuticals, Inc. has 3,177 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 15.3%.

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

About Alnylam Pharmaceuticals

To those who say “impossible, impractical, unrealistic,” we say: “CHALLENGE ACCEPTED.” Alnylam is the world's leading RNAi therapeutics company and the first and only company to bring RNAi-based medicines to market. We are developing RNAi (RNA interference) as an innovative, entirely new class of medicines to treat rare genetic, cardio metabolic, acute hepatic infectious and central nervous system (CNS) and ocular diseases. Alnylam was founded in 2002 based on a Nobel Prize-winning breakthrough in biology – the discovery of RNAi, and a bold vision that this discovery could be used to silence disease-causing genes upstream of today’s medicines. We are relentless in our pursuit of new treatments because we believe that RNAi therapeutics can be used to treat many diseases for which treatment options do not exist or are inadequate. Alnylam is turning scientific possibility into reality - in 2018, the FDA and EMA approved of our first product, ONPATTRO (patisiran) which is also the first-ever approved RNAi therapeutic. We now have four additional medicines on the market. Our robust pipeline of investigational medicines includes multiple programs in late-stage and early-stage clinical development. We are a global and diverse company of 2,000+ people. We pride ourselves on fostering a fun, inclusive and dynamic work environment where employees can recognize their fullest potential. That's why we've been named a Science Magazine Top Employer 5 years in a row ('19-'23), a Boston Globe Top Place to Work 9x in a row ('15-'23) and Fast Company's #1 Best Workplace for Innovators ('22). We are based in Cambridge, U.S., with offices throughout Europe, Asia, and South America. See our community guidelines: https://bit.ly/2FcRhJy.

As of September 2025

Alnylam Pharmaceuticals
workforce metrics

Headcount

3.2k

Avg. Salary

$162.8k

Tenure

2.6yr

Growth Rate

15.3%

Hiring Rate

Attrition Rate

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Employee Headcount

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

  • Alnylam Pharmaceuticals total number of employees in 2025 was 3,151.311, a 15.3% increase from 2024.
  • Alnylam Pharmaceuticals total number of employees in 2024 was 2,742.231, a 4.8% increase from 2023.
  • Alnylam Pharmaceuticals total number of employees in 2023 was 2,602.933, a 3.0% increase from 2022.

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Employee Geographic Breakdown

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Employee Role Breakdown

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Employee Compensation

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Active Job Postings

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

  • Alnylam Pharmaceuticals active job postings in 2025 was 782, a 82.8% increase from 2024.
  • Alnylam Pharmaceuticals active job postings in 2024 was 584, a 30.1% increase from 2023.
  • Alnylam Pharmaceuticals active job postings in 2023 was 431, a 16.9% increase from 2022.

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Employee Sentiment

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