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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

Promaxo key facts

as of Oct 2026
  • Developer of a portable magnetic resonance imaging (MRI) system designed for improving prostate cancer diagnosis and treatment.
  • Promaxo is valued at approximately $104.2M as of Oct 2026 (last reported valuation).
  • It has raised $107.7M across 3 recorded rounds; the latest was Early Stage VC ($41.9M) in Mar 2024.
  • Notable investors include US National Science Foundation, MedTech Innovator, Keiretsu Forum, TEDCO, Band of Angels — 24 tracked in total.
  • Promaxo has filed 4 Form Ds with the SEC since 2020, most recently Jul 2024 ($41.9M sold to 163 investors).
  • Status: Privately Held (backing).
Last reported valuation
LOW confidence
$104.2M

Promaxo's last reported valuation, Jan 2021. Nothing priced has surfaced since.

set by last reported valuationas of Oct 2026question about this number?
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Promaxo funding rounds

3 rounds
Mar 2024Early Stage VC$41.9MSEC filing▮
Dec 2020Seed Round$4.2MSEC filing▮
May 2020Early Stage VC$11.0MSEC filing▮
Full funding history →

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).

Promaxo investors

24 investors are on record for Promaxo, including US National Science Foundation, MedTech Innovator, Keiretsu Forum and TEDCO. The early-stage round in Mar 2024 drew 163 investors.

About Promaxo

Developer of a portable magnetic resonance imaging (MRI) system designed for improving prostate cancer diagnosis and treatment. The company's system integrates imaging, artificial intelligence, and robotics, offering features such as real-time intra-operative planning, targeted interventions, and compact installation, enabling healthcare providers to enhance diagnostic accuracy, streamline procedures, and deliver personalized care in accessible settings.

Sector
Healthcare
HQ
Oakland, CA, United States
Founded
2016
Employees
58
Ownership
Privately Held (backing)

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