Affinia Therapeutics

Waltham, MA · Founded 2019 · Privately Held (backing)

Developer of an adeno-associated virus gene therapy platform intended to focus on diseases affecting the central nervous system and muscles. Affinia Therapeutics is based in Waltham, MA and was founded in 2019. It was valued at $145 million at its later-stage round in Oct 2025, the last priced event on record. It has raised $210 million across 3 recorded rounds; the latest was a $13.3 million early-stage round in Sep 2025.

PMV mark · valuation
$145.0M
Oct 2026
Priced at
its later-stage round
Oct 2025
Total raised
$210.0M
Last round
Early Stage VC
Sep 2025
What is Affinia Therapeutics worth?
$145.0MPrivateMarketView mark · Oct 2026

Valued at $145.0M at its later-stage round, Oct 2025. Nothing has traded 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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Affinia Therapeutics funding history

3 rounds
DateRoundRaisedPost-money
Sep 2025Early Stage VC$13.3M▮
Apr 2021Later Stage VC$110.0M▮
Mar 2020Early Stage VC$38.5M▮
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Affinia Therapeutics valuation

Affinia Therapeutics was valued at $145 million at its later-stage round in Oct 2025. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.

How much has Affinia Therapeutics raised?

Affinia Therapeutics has raised $210 million across 3 recorded rounds since 2020. The largest was a $38.5 million early-stage round in Mar 2020; the most recent was a $13.3 million early-stage round in Sep 2025.

Affinia Therapeutics has filed 2 Form Ds with the SEC since 2020, most recently in May 2021 ($110 million sold to 22 investors).

How Affinia Therapeutics'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 Affinia Therapeutics, 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 its last priced round. Question about this number? Full methodology →

Frequently asked about Affinia Therapeutics

What is Affinia Therapeutics worth?
Affinia Therapeutics is valued at $145.0M as of Oct 2026. Valued at $145.0M at its later-stage round, Oct 2025. Nothing has traded since.
How much has Affinia Therapeutics raised?
Affinia Therapeutics has raised $210.0M in total funding across 3 recorded rounds.
When did Affinia Therapeutics last raise?
Affinia Therapeutics last raised in Sep 2025 (Early Stage VC), raising $13.3M.