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
How much has Diagonal Therapeutics raised?
$271.3Macross 2 recorded rounds · Apr 2024 – Jan 2026

Most recently, Diagonal Therapeutics raised $125.0M in its Early Stage VC (Series B) (Jan 2026).

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Diagonal Therapeutics round by round

2 rounds
Jan 2026Early Stage VC (Series B)$125.0M▮
+ 2 more investors · free account
Apr 2024Early Stage VC (Series A)$128.0M▮
+ 2 more investors · free account

How much has Diagonal Therapeutics raised?

Diagonal Therapeutics has raised $271 million across 2 recorded rounds since 2024. The largest was a $128 million Series A in Apr 2024; the most recent was a $125 million Series B in Jan 2026.

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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Frequently asked about Diagonal Therapeutics

How much has Diagonal Therapeutics raised?
Diagonal Therapeutics has raised $271.3M in total across 2 recorded funding rounds.
When was Diagonal Therapeutics's last funding round?
Diagonal Therapeutics's most recent recorded round was Early Stage VC (Series B) in Jan 2026, raising $125.0M.