Transition Bio
Cambridge, US · Founded 2020 · Delaware corporation · 5 known investors
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Transition Bio applies methods from physics, chemistry, biology, and machine learning to study protein biophysics—including protein aggregation, self-assembly, and protein-protein interactions—for developing therapeutics targeting health and disease. The company is a platform-based biotherapeutics developer founded on academic research from the University of Cambridge.
Founders & leadership
Transition Bio was founded in 2020 by Tuomas Knowles, Samuel Cohen, and G. Kelly Martin.


Board

Investors · 5
How we know: the company's own site · a partner's Signal profile · funding news · citybiz.co · Not right? Tell us
How we know: Lifeforce Capital's portfolio page · the VCSheet dataset · Not right? Tell us
How we know: Magnetic Ventures's portfolio page · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
Reported raises · per SEC filings
Form D private placements$58.4M disclosed across 3 rounds · 2022–2024
▶$13.3MraisedOct 2024 · 8 investors · BiotechnologyRule 506(b)
- Tuomas KnowlesDirector
- Kathy YiDirector
- Robert WeeksDirector
- George MartinExecutive Officer, Director
- Al SandrockDirector
- Stephanie TorruellaExecutive Officer
- Samuel CohenDirector
- Preet MakkarExecutive Officer
- Paxton MajorDirector
- Offering amount
- $21.3M
- Amount sold
- $13.3M
- First sale
- Oct 2024
- Incorporated
- Corporation, Delaware, 2020
- Federal exemptions
- 06b
▶$6MraisedJan 2024 · 5 investors · BiotechnologyRule 506(b)
- Samuel CohenDirector
- Connor McDermottDirector
- Tuomas KnowlesExecutive Officer, Director
- George MartinExecutive Officer, Director
- Preet MakkarExecutive Officer
- Kathy YiDirector
- Stephanie TorruellaExecutive Officer
- Al SandrockDirector
- Offering amount
- $15M
- Amount sold
- $6M
- First sale
- Dec 2023
- Incorporated
- Corporation, Delaware, 2020
- Federal exemptions
- 06b
▶$39.1MraisedMar 2023 · 22 investors · BiotechnologyRule 506(b)
- Kathy YiDirector
- Samuel CohenDirector
- George K. MartinDirector
- Martin KulanderExecutive Officer
- Connor McDermottDirector
- Tuomas KnowlesExecutive Officer
- Gregory L. MillerExecutive Officer, Director
- Al SandrockDirector
- Offering amount
- $50M
- Amount sold
- $39.1M
- First sale
- Mar 2022
- Incorporated
- Corporation, Delaware, 2020
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
In the news
Frequently asked questions
- What does Transition Bio do?
- Transition Bio applies methods from physics, chemistry, biology, and machine learning to study protein biophysics—including protein aggregation, self-assembly, and protein-protein interactions—for developing therapeutics targeting health and disease. The company is a platform-based biotherapeutics developer founded on academic research from the University of Cambridge.
- Who founded Transition Bio?
- Transition Bio was founded by Tuomas Knowles, Samuel Cohen, G. Kelly Martin in 2020.
- Who are Transition Bio's investors?
- Transition Bio's investors include Northpond Ventures, Lifeforce Capital, Magnetic Ventures, Taiho Ventures, LLC, Dolby Family Ventures.
- How much funding has Transition Bio raised?
- Transition Bio has disclosed $58.4M raised across 3 rounds.
- Where is Transition Bio headquartered?
- Transition Bio is headquartered in Cambridge, US.



