Diagonal Therapeutics
Advancing clustering antibodies to correct disease at the root
Watertown, United States · Founded 2022
- Headquarters
- Watertown, Massachusetts
- Employees
- 11–50
- Founded
- 2022
- Website
- diagonaltx.com
- Last Round
- Series BJan 2026
- Rounds
- 2
About
Diagonal Therapeutics pioneers a new class of clustering antibody medicines designed to correct the root causes of severe genetic and immune-mediated diseases. Founded in 2022, the company's lead program DIAG723 targets HHT by restoring ALK1 signaling and is advancing toward clinical trials in 2026.
Summary
Diagonal Therapeutics is a Biotech company based in Watertown, United States, founded in 2022. Its most recent funding was a Series B round in Jan 2026. Investors include BVF Partners, Atlas Venture and Sanofi Ventures.
Tech & App Stack
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Funding History
Jan 2026
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Series A through Series B — per-round amounts, valuations, and who invested in each round.
Investors
BVF Partners
2 rounds
Atlas Venture
2 rounds
Sanofi Ventures
1 round
Janus Henderson Investors
1 round
Lightspeed Venture Partners
2 rounds
RA Capital Management
2 rounds
Frazier Life Sciences
2 rounds
Viking Global
2 rounds
Velosity Capital
2 rounds
Checkpoint Capital
2 rounds
Deep Track Capital
1 round
EcoR1 Capital
1 round
Logos Capital
1 round
Balyasny Asset Management
1 round
Woodline Partners
1 round
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