Promaxo

Oakland, CA · Founded 2016 · Privately Held (backing)

Developer of a portable magnetic resonance imaging (MRI) system designed for improving prostate cancer diagnosis and treatment. Promaxo is based in Oakland, CA and was founded in 2016. Its last reported valuation was $104 million in Jan 2021. It has raised $108 million across 3 recorded rounds; the latest was a $41.9 million early-stage round in Mar 2024.

Last reported valuation
$104.2M
Oct 2026
Priced at
—
Total raised
$107.7M
Last round
Early Stage VC
Mar 2024
What is Promaxo worth?
$104.2Mlast reported valuation · Oct 2026

Promaxo's last reported valuation, Jan 2021. 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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Promaxo funding history

3 rounds
DateRoundRaisedPost-money
Mar 2024Early Stage VC$41.9M▮
Dec 2020Seed Round$4.2M▮
May 2020Early Stage VC$11.0M▮
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Promaxo valuation

Promaxo's last reported valuation was $104 million in Jan 2021. No priced round, secondary trade or fund mark has surfaced since.

How much has Promaxo raised?

Promaxo has raised $108 million across 3 recorded rounds since 2020. The largest was a $41.9 million early-stage round in Mar 2024.

Promaxo has filed 4 Form Ds with the SEC since 2020, most recently in Jul 2024 ($41.9 million sold to 163 investors).

How Promaxo'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 Promaxo, 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 Promaxo

What is Promaxo worth?
Promaxo is valued at $104.2M as of Oct 2026. Promaxo's last reported valuation, Jan 2021. Nothing priced has surfaced since.
How much has Promaxo raised?
Promaxo has raised $107.7M in total funding across 3 recorded rounds.
When did Promaxo last raise?
Promaxo last raised in Mar 2024 (Early Stage VC), raising $41.9M.