Actithera

Cambridge, MA · Founded 2021 · Privately Held (backing)

Operator of a molecular radio therapeutic company intended for biotechnology research services. Actithera is based in Cambridge, MA and was founded in 2021. Its last reported valuation was $110 million in Jul 2025. It has raised $80.8 million.

Last reported valuation
$110.0M
Oct 2026
Priced at
—
Total raised
$80.8M
Last round
—

Who backs Actithera?

10 investors
InvestorType
Sofinnova PartnersVenture capital
InnovestorVenture capital
M VenturesVenture capital
Arkin CapitalFamily office
Surveyor CapitalHedge fund
InvestinorVenture capital
4BIO Capital—
Arkin Bio Ventures—
Bioqube Ventures—
Hadean Ventures—
The directory is free. Investor activity — the working column — is Pro.Unlock prospecting columns

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Actithera investors

10 investors are on record for Actithera, including Sofinnova Partners, Innovestor, M Ventures and Arkin Capital. By type, the record holds 4 venture capital firms, 1 family office and 1 hedge fund.

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