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
Team — not yet on record
No current team members for Diagonal Therapeutics are on record yet. People surface from round filings, company disclosures, and coverage sessions.
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·The complete investor list: 17 names
·Watch Diagonal Therapeutics: the Monday email on marks, rounds and moves
