Top Biotech companies
Companies applying biology, chemistry, and computation to therapeutics and tooling.
Ranked by current headcount across the largest Biotech companies. Refreshed daily.
- 1Roche· Basel, Basel, Switzerland
- Post-IPO equity
- 104.1k employees
- 2Thermo Fisher Scientific· Waltham, Massachusetts, United States
- Post-IPO debt
- 99.8k employees
- Founded 1956
- 3Amgen· Thousand Oaks, California, United States
- Post-IPO debt
- 39.9k employees
- Founded 1980
- 4ICON plc· Greater Dublin
- Post-IPO debt
- 34.6k employees
- Founded 1990
- 5The National Institutes of Health· Bethesda, Maryland, United States
- Grant
- 28.8k employees
- 6Eurofins· Luxembourg, Luxembourg, Luxembourg
- Post-IPO debt
- 25.9k employees
- Founded 1987
- 7Syneos Health· Morrisville, North Carolina, United States
- Private equity
- 23.3k employees
- Founded 1985
- 8CSL· Carlton, Victoria, Australia
- Post-IPO equity
- 23.2k employees
- Founded 1916
- 9Genentech· South San Francisco, California, United States
- Series A
- 18.1k employees
- Founded 1976
- 10Agilent Technologies· Santa Clara, California, United States
- Post-IPO debt
- 17.7k employees
- Founded 1999
- 11aucune/none· France
- 17.1k employees
- Founded 1992
- 12Regeneron· Tarrytown, New York, United States
- Post-IPO equity
- 16.7k employees
- Founded 1988
- 13Charles River Laboratories· Wilmington, Massachusetts, United States
- Grant
- 14.8k employees
- Founded 1947
- 14Gilead Sciences· San Mateo, California, United States
- Post-IPO debt
- 14.6k employees
- Founded 1987
- 15
- 12.9k employees
- Founded 1963
- 16Avantor· Radnor, Pennsylvania, United States
- Private equity
- 12.7k employees
- Founded 1904
- 17Biocon· Bengaluru, Karnataka, India
- Post-IPO equity
- 11.7k employees
- Founded 1978
- 18Fortrea· Triangle, North Carolina, United States
- 11.3k employees
- Founded 2023
- 19Waters Corporation· Milford, Massachusetts, United States
- Post-IPO debt
- 10.9k employees
- Founded 1905
- 20
- 10.9k employees
- Founded 2000
- 21MilliporeSigma· Burlington, Massachusetts, United States
- 10.5k employees
- Founded 1951
- 22
- 9.9k employees
- 23Illumina· San Diego, California, United States
- Post-IPO debt
- 9.5k employees
- Founded 1998
- 24Bio-Rad Laboratories· Hercules, California, United States
- Post-IPO debt
- 9.3k employees
- Founded 1952
- 25Merck Life Science· Darmstadt, Hesse, Germany
- 8.5k employees
Find engineers and designers at top Biotech companies
The Biotech industry runs on the people who build it. The list above ranks the largest Biotech companies by current headcount, drawn from public LinkedIn and Crunchbase records. Across the 7,556 Biotechcompanies in our index, you’ll find software engineers, ML researchers, designers, founders, and recruiters worth talking to — whether you’re hiring, investing, or doing market research.
Each company on the list is a hub of talent. The biggest Biotech companies tend to attract specialised engineers, while younger ones run on small founding teams and hire generalists. Looking at headcount, last funding round, and HQ location side by side gives you a quick read on where the talent density is highest.
Refolk turns this list into a search. Ask for “Biotechengineers in San Francisco hiring senior ML” or “designers at Biotechcompanies who shipped a product in 2025” and Refolk returns a fresh ranked shortlist with the sources that earned each person a spot.
How this list is built
Last refreshed: Thu, 07 May 2026 04:55:32 GMT
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