Membrion key facts
as of Oct 2026- Developer of ion exchange membrane technology designed for industrial wastewater.
- Membrion is valued at approximately $27.5M as of Oct 2026 (last reported valuation).
- It has raised $46.3M across 6 recorded rounds; the latest was Early Stage VC ($20.0M) in Jun 2025.
- Notable investors include US National Science Foundation, U.S. Department of Energy, Samsung NEXT Ventures, Third Derivative, Sand Hill Angels — 39 tracked in total.
- Membrion has filed 6 Form Ds with the SEC since 2018, most recently Jul 2025 ($11.3M sold to 24 investors).
- Status: Privately Held (backing).
Membrion's last reported valuation, Aug 2023. Nothing priced has surfaced since.
- ·The complete investor list: 39 names
- ·Watch Membrion: the Monday email on marks, rounds and moves
Membrion funding rounds
6 roundsWho backs Membrion
39+Membrion valuation
Membrion's last reported valuation was $27.5 million in Aug 2023. No priced round, secondary trade or fund mark has surfaced since.
How much has Membrion raised?
Membrion has raised $46.3 million across 6 recorded rounds since 2018. The largest was a $3 million seed round in Sep 2021; the most recent was a $20 million early-stage round in Jun 2025.
Membrion has filed 6 Form Ds with the SEC since 2018, most recently in Jul 2025 ($11.3 million sold to 24 investors).
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.
About Membrion
Developer of ion exchange membrane technology designed for industrial wastewater. The company's technology filters molecules under any conditions, including hot, cold, acidic, caustic, vacuum, and biologically sensitive environments, made from silica gel, enabling businesses to access membranes with a longer lifetime and lower cost.
- Sector
- Business Products and Services (B2B)
- HQ
- Seattle, WA, United States
- Founded
- 2016
- Employees
- 32
- Website
- membrion.com/
- Ownership
- Privately Held (backing)
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