Top Biotech companies in London
Companies applying biology, chemistry, and computation to therapeutics and tooling. Filtered to companies headquartered in London.
- IndustryBiotech
- HQLondon
- Matches231
Built from a search like: “Top Biotech companies in London”
Ranked by current headcount across Biotech companies headquartered in London. Refreshed daily.
- 1LGC· London, England, United Kingdom
- 2.3k employees
- Founded 1996
- 2Perceptive Inc.· London, England, United Kingdom
- Private equity
- 1.2k employees
- Founded 1996
- 3Autolus Therapeutics· London, England, United Kingdom
- Post-IPO equity
- 760 employees
- Founded 2014
- 4Genomics England· London, England, United Kingdom
- 561 employees
- Founded 2013
- 5MeiraGTx· London, England, United Kingdom
- Post-IPO equity
- 419 employees
- Founded 2015
- 6Isomorphic Labs· London, England, United Kingdom
- Series A
- 348 employees
- Founded 2021
- 7Cell and Gene Therapy Catapult· London, England, United Kingdom
- Grant
- 325 employees
- Founded 2012
- 8Verona Pharma· London, England, United Kingdom
- Post-IPO debt
- 264 employees
- Founded 2005
- 9Orchard Therapeutics - U.S.· London, England, United Kingdom
- Post-IPO equity
- 239 employees
- Founded 2015
- 10hVIVO· London, England, United Kingdom
- Series B
- 203 employees
- Founded 1989
- 11Bode Technology· Lorton, Virginia, United States
- 186 employees
- Founded 1995
- 12Touchlight· Hampton, England, United Kingdom
- Grant
- 184 employees
- Founded 2008
- 13Meridian Life Science-Academic (previously Bioline)· London, England, United Kingdom
- 182 employees
- Founded 1992
- 14DNA Electronics (DNAe)· London, England, United Kingdom
- 177 employees
- Founded 2003
- 15Vigilare· Ruislip, England, United Kingdom
- 170 employees
- Founded 2014
- 16Quell Therapeutics· London, England, United Kingdom
- Series B
- 131 employees
- Founded 2019
- 17Relation· Greater London, England, United Kingdom
- Series unknown
- 124 employees
- Founded 2019
- 18Sava· London, England, United Kingdom
- Series A
- 116 employees
- Founded 2016
- 19BioPhorum· London, England, United Kingdom
- Private equity
- 112 employees
- Founded 2008
- 20MJ Biopharma Ltd· London, England, United Kingdom
- 102 employees
- Founded 2023
- 21EyeBio· London, England, United Kingdom
- Series A
- 95 employees
- Founded 2021
- 22LYMA· London Colney, England, United Kingdom
- Seed
- 93 employees
- Founded 2018
- 23Silence Therapeutics plc· London, England, United Kingdom
- Post-IPO equity
- 91 employees
- Founded 1999
- 24IXICO· London, England, United Kingdom
- Post-IPO equity
- 89 employees
- Founded 2004
- 25BioIndustry Association (BIA)· London, England, United Kingdom
- 80 employees
- Founded 1989
Find engineers at Biotech companies in London
London has long been a hub for Biotech, and the list above ranks the largest Biotech companies headquartered there by current headcount, drawn from public LinkedIn and Crunchbase records. With 231 matching companies in our index, this is a good map of where the Biotech talent in Londonlives — useful whether you’re recruiting, partnering, or sizing a market.
The biggest Biotech companies in London tend to be the gravitational centres for specialised talent — senior engineers, ML researchers, applied scientists, designers — while the smaller ones compete on speed, equity, and proximity to founders.
Refolk converts this list into a live search. Ask for “Biotech engineers in Londonhiring senior staff” or “founders of Biotech companies in Londonwho left in the last 12 months” and Refolk returns a ranked shortlist with the evidence that earned each person a spot.
How this list is built
Last refreshed: Thu, 07 May 2026 10:00:05 GMT
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