Refolk

Series A Biotech companies in London

Companies applying biology, chemistry, and computation to therapeutics and tooling. Filtered to Series A-stage companies headquartered in London.

Built from a search like: Top Series A Biotech companies in London

Ranked by current headcount across Series A Biotech companies in London. Refreshed daily.

  1. 1
    Isomorphic Labs· London, England, United Kingdom
    • Series A
    • 348 employees
    • Founded 2021
  2. 2
    Sava· London, England, United Kingdom
    • Series A
    • 116 employees
    • Founded 2016
  3. 3
    EyeBio· London, England, United Kingdom
    • Series A
    • 95 employees
    • Founded 2021
  4. 4
    IMU Biosciences· London, England, United Kingdom
    • Series A
    • 76 employees
    • Founded 2019
  5. 5
    Verdiva Bio· London, England, United Kingdom
    • Series A
    • 73 employees
    • Founded 2024
  6. 6
    Alchemab Therapeutics Ltd· London, England, United Kingdom
    • Series A
    • 62 employees
    • Founded 2019
  7. 7
    Purespring Therapeutics· London, England, United Kingdom
    • Series A
    • 59 employees
    • Founded 2020
  8. 8
    Engitix Therapeutics· London, England, United Kingdom
    • Series A
    • 58 employees
    • Founded 2016
  9. 9
    Amber Therapeutics· London, England, United Kingdom
    • Series A
    • 56 employees
    • Founded 2021
  10. 10
    Portal Biotech· London, England, United Kingdom
    • Series A
    • 56 employees
    • Founded 2021
  11. 11
    Mytos· London, England, United Kingdom
    • Series A
    • 48 employees
    • Founded 2016
  12. 12
    Peptone· London, England, United Kingdom
    • Series A
    • 45 employees
    • Founded 2018
  13. 13
    Shellworks· Greater London, England, United Kingdom
    • Series A
    • 43 employees
    • Founded 2019
  14. 14
    Myricx Bio· London, England, United Kingdom
    • Series A
    • 32 employees
    • Founded 2019
  15. 15
    Baseimmune· London, England, United Kingdom
    • Series A
    • 29 employees
    • Founded 2019
  16. 16
    Multus· London, England, United Kingdom
    • Series A
    • 27 employees
    • Founded 2020
  17. 17
    Eleusis· London, England, United Kingdom
    • Series A
    • 26 employees
    • Founded 2013
  18. 18
    Hyris· London, England, United Kingdom
    • Series A
    • 24 employees
    • Founded 2014
  19. 19
    Centauri Therapeutics Limited· London, England, United Kingdom
    • Series A
    • 23 employees
    • Founded 2015
  20. 20
    Leucid Bio· London, England, United Kingdom
    • Series A
    • 23 employees
    • Founded 2014
  21. 21
    Kesmalea Therapeutics· London, England, United Kingdom
    • Series A
    • 21 employees
    • Founded 2020
  22. 22
    SyntheticGestalt· London, England, United Kingdom
    • Series A
    • 20 employees
    • Founded 2018
  23. 23
    AstronauTx· London, England, United Kingdom
    • Series A
    • 19 employees
    • Founded 2019
  24. 24
    Kadence Bio· London, England, United Kingdom
    • Series A
    • 18 employees
    • Founded 2021
  25. 25
    Resurrect Bio· London, England, United Kingdom
    • Series A
    • 15 employees
    • Founded 2022

Find engineers at Series A Biotech companies in London

Searching for “engineers at top Series A Biotech companies in London” surfaces this slice of the market. The list above ranks Biotech companies headquartered in London whose latest disclosed round is Series A, by current headcount, drawn from public LinkedIn and Crunchbase records. With 28 matching companies in our index, this is a tight read on where the Biotech talent in London is heating up.

Three filters at once narrows the field hard. The companies that survive all three — Series A, Biotech, in London — are usually the most targeted recruiting pool a hiring manager can ask for. Senior engineers, founding designers, and product leads here are about to become Biotech’s next operators and angel investors.

Refolk converts this list into a live search. Ask for “senior engineers at Series A Biotech companies in London hiring” or “founders of Series A Biotech companies in London who left in the last year” and Refolk returns a ranked shortlist with the evidence behind each match.

How this list is built

Refolk pulled Biotech companies headquartered in London whose latest disclosed funding round is Series A from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes once a day.

Last refreshed: Thu, 07 May 2026 08:10:39 GMT

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