Membrion

Seattle, WA · Founded 2016 · Privately Held (backing)

Developer of ion exchange membrane technology designed for industrial wastewater. Membrion is based in Seattle, WA and was founded in 2016. Its last reported valuation was $27.5 million in Aug 2023. It has raised $46.3 million across 6 recorded rounds; the latest was a $20 million early-stage round in Jun 2025.

Last reported valuation
$27.5M
Oct 2026
Priced at
—
Total raised
$46.3M
Last round
Early Stage VC
Jun 2025

Who backs Membrion?

39 investors
InvestorType
US National Science FoundationOther
U.S. Department of EnergyOther
Samsung NEXT VenturesVenture capital
Third DerivativeOther
Sand Hill AngelsVenture capital
New York AngelsAngel
E8 (Seattle)Angel
Safar PartnersVenture capital
Indico Capital PartnersVenture capital
WRF CapitalOther
+ 29 more investors · a free account shows the complete list
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Membrion investors

39 investors are on record for Membrion, including US National Science Foundation, U.S. Department of Energy, Samsung NEXT Ventures and Third Derivative. By type, the record holds 5 venture capital firms and 2 angel investors. The early-stage round in Jun 2025 drew 27 investors.

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