Diagonal Therapeutics

Drug Discovery · Watertown, MA · Founded 2022 · Privately Held (backing)

Operator of a biotech company intended to discover and develop agonist antibodies. Diagonal Therapeutics is based in Watertown, MA and was founded in 2022. It was valued at $459 million at its early-stage round in Jan 2026, the last priced event on record. It has raised $271 million across 2 recorded rounds; the latest was a $125 million Series B in Jan 2026.

PMV mark · valuation
$458.5M
Oct 2026
Priced at
its early-stage round
Jan 2026
Total raised
$271.3M
Last round
Early Stage VC (Series B)
Jan 2026

Who backs Diagonal Therapeutics?

17 investors
InvestorType
Lightspeed Venture PartnersVenture capital
Viking Global InvestorsAsset manager
RA Capital ManagementAsset manager
Logos CapitalHedge fund
Frazier Healthcare PartnersVenture capital
Atlas VentureOther
Deep Track CapitalVenture capital
EcoR1 CapitalHedge fund
Woodline PartnersHedge fund
Balyasny Asset ManagementHedge fund
+ 7 more investors · a free account shows the complete list
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Diagonal Therapeutics investors

17 investors are on record for Diagonal Therapeutics, including Lightspeed Venture Partners, Viking Global Investors, RA Capital Management and Logos Capital. By type, the record holds 5 hedge funds, 3 venture capital firms and 2 asset managers. The Series B in Jan 2026 drew 16 investors.

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