Diagonal Therapeutics

Raised $125M in a Series B round, announced 8 January 2026.

Total raised
$125M

Latest round Series BCountry United StatesSector Health

Round

$125MSeries B, 8 January 2026

Oversubscribed Series B to take lead antibody DIAG723 into first-in-human trial in HHT in H1 2026.

Amount
$125M
Stage
Series B
Announced
8 January 2026
Lead
Sanofi Ventures
Other investors
Janus Henderson Investors, Deep Track Capital, EcoR1 Capital, Logos Capital, Balyasny Asset Management, Woodline Partners
Use of funds
Oversubscribed Series B to take lead antibody DIAG723 into first-in-human trial in HHT in H1 2026.
Checked
Announced by the company
Sources
Diagonal Therapeutics: $125 Million Series B Raised To Advance DIAG723 Clustering Antibody Into the Clinic biospace.com
Diagonal Therapeutics: $125 Million Series B Raised To Advance DIAG723 Clustering Antibody Into the Clinic pulse2.com
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Company

Clustering antibodies for vascular diseases such as HHT and PAH

Based in
Watertown, United States
Sector
Health
Website
diagonaltx.com ↗

Links

Website
diagonaltx.com ↗

Questions

How much has Diagonal Therapeutics raised?

Diagonal Therapeutics raised $125M in a Series B round, announced on 8 January 2026.

Who invested in Diagonal Therapeutics?

Sanofi Ventures led. Investors include Sanofi Ventures, Janus Henderson Investors, Deep Track Capital, EcoR1 Capital, Logos Capital and Balyasny Asset Management.