Aer Therapeutics

Durham, United Kingdom · Founded 2014 · Privately Held (backing)

Operator of a biopharmaceutical company intended to treat lung disease with excess mucus and mucus plugs. Aer Therapeutics is based in Durham, United Kingdom and was founded in 2014. It was valued at $58 million at a debt round in Mar 2025, the last priced event on record. It has raised $48 million across 2 recorded rounds; the latest was a $5 million early-stage round in Jan 2025.

PMV mark · valuation
$58.0M
Oct 2026
Priced at
a debt round
Mar 2025
Total raised
$48.0M
Last round
Early Stage VC
Jan 2025
What is Aer Therapeutics worth?
$58.0MPrivateMarketView mark · Oct 2026

Valued at $58.0M at a debt round, Mar 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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Aer Therapeutics funding history

2 rounds
DateRoundRaisedPost-money
Jan 2025Early Stage VC$5.0M▮
Dec 2022Early Stage VC$15.9M▮
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Aer Therapeutics valuation

Aer Therapeutics was valued at $58 million at a debt round in Mar 2025. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.

How much has Aer Therapeutics raised?

Aer Therapeutics has raised $48 million in total; 2 of its rounds are on record. The largest on record was a $5 million early-stage round in Jan 2025.

Aer Therapeutics has filed 2 Form Ds with the SEC since 2022, most recently in Feb 2025 ($5 million sold to 15 investors).

How Aer 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 Aer 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 Aer Therapeutics

What is Aer Therapeutics worth?
Aer Therapeutics is valued at $58.0M as of Oct 2026. Valued at $58.0M at a debt round, Mar 2025. Nothing has traded since.
How much has Aer Therapeutics raised?
Aer Therapeutics has raised $48.0M in total funding across 2 recorded rounds.
When did Aer Therapeutics last raise?
Aer Therapeutics last raised in Jan 2025 (Early Stage VC), raising $5.0M.