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
—
What is Actithera worth?
$110.0Mlast reported valuation · Oct 2026

Actithera's last reported valuation, Jul 2025. Nothing priced has surfaced since.

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Valuation timeline

0 priced rounds · 32 daily marks since · Sep 2026 – Oct 2026
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Markrounds hold their value until the next priced eventMark, today
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Actithera funding history

No rounds on record

No funding rounds for Actithera are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.

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Actithera valuation

Actithera's last reported valuation was $110 million in Jul 2025. No priced round, secondary trade or fund mark has surfaced since.

How Actithera's valuation is determined

Private company valuations aren’t quoted on an exchange — they’re established in moments: a priced funding round sets a post-money valuation, secondary trades print at a price per share, and SEC-registered funds holding the stock report fair-value marks in their N-PORT filings.

For Actithera, the most current credible signal sets the number and the older ones confirm it: a live secondary-market price first, then three or more recent prints, then institutional fund marks, and otherwise the last priced round, which never decays. The valuation is the last round’s post-money moved by the price change since that round, so no share count is assumed. Today it is set by last reported valuation. Question about this number? Full methodology →

Frequently asked about Actithera

What is Actithera worth?
Actithera is valued at $110.0M as of Oct 2026. Actithera's last reported valuation, Jul 2025. Nothing priced has surfaced since.
How much has Actithera raised?
Actithera has raised $80.8M in total funding across its recorded rounds.