# Membrion

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/membrion

- Industry: Materials
- Headquarters: Seattle, US
- Website: www.membrion.com
- Total disclosed funding: $41M
- Latest round: Series B (Jun 16, 2025)
- Investors on record: 18

## About

Founded in 2016 and based in Washington, US, Membrion, Inc. operates as a developer of a membrane technology that helps filter molecules for many applications such as electrodialysis water desalination, redox flow batteries, and pharmaceutical purification. It can filter molecules under any conditions including hot, cold, acidic, caustic, and vacuum.

## Funding rounds

- Series B, Jun 16, 2025, $20M — Pangaea Ventures, W.L. Gore & Associates, Inc., Ecolab USA Inc., PureTerra Ventures, Indico Capital, Safar Partners, Lam Capital, Giantleap Capital
- Series B, Aug 8, 2023, $5.5M — Samsung Venture Investment, Harvard Business School, Indico Capital, Lam Capital, GiantLeap Capital, New York Angels
- Series B, Dec 9, 2022, $7M — PureTerra Ventures, Safar Partners, Freeflow Ventures, GiantLeap Capital
- Series A, Mar 4, 2020, $6M — WRF Capital, Bellingham Angel Investors, SeaChange
- Seed, Dec 5, 2018, $1.5M — Sierra Angels, Sand Hill Angels, E8 Angels
- Seed, Aug 13, 2018, $1M — Bellingham Angel Investors, E8 Angels

## Investors

- Bellingham Angel Investors (https://capitalatlas.ai/funds/bellingham-angel-investors) — Seed, Series A
- E8 Angels — Seed
- Sierra Angels — Seed
- Sand Hill Angels (https://capitalatlas.ai/funds/sand-hill-angels) — Seed
- WRF Capital (https://capitalatlas.ai/funds/wrf-capital) — Series A
- SeaChange (https://capitalatlas.ai/funds/seachange) — Series A
- PureTerra Ventures (https://capitalatlas.ai/funds/pureterra-ventures) — Series B
- Safar Partners (https://capitalatlas.ai/funds/safar-partners) — Series B
- Freeflow Ventures (https://capitalatlas.ai/funds/freeflow-ventures) — Series B
- GiantLeap Capital (https://capitalatlas.ai/funds/giantleap-capital) — Series B
- Samsung Venture Investment (https://capitalatlas.ai/funds/samsung-venture-investment) — Series B
- Harvard Business School — Series B
- Indico Capital (https://capitalatlas.ai/funds/indico-capital) — Series B
- Lam Capital (https://capitalatlas.ai/funds/lam-capital) — Series B
- New York Angels (https://capitalatlas.ai/funds/new-york-angels) — Series B
- Pangaea Ventures (https://capitalatlas.ai/funds/pangaea-ventures) — Series B
- W.L. Gore & Associates, Inc. — Series B
- Ecolab USA Inc. — Series B