# Magrathea Metals

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/magrathea-metals

- Industry: Materials
- Headquarters: San Francisco, US
- Website: www.magratheametals.com
- Total disclosed funding: $34M
- Latest round: Series A (May 5, 2026)
- Investors on record: 15

## About

Based in California, US, and founded in 2022 by CEO Alexander Grant, Magrathea Metals Inc. operates as a producer of electrolytic technology for making carbon-neutral magnesium metal from seawater and brines for the era of electrification and decarbonization. In May 2026, Magrathea Metals Inc. raised USD 24 million in series A funding co-led by Resource Technology Capital and Balerion Space Ventures, with participation from other Audacity, Avila VC, Oxcart Ventures, WovenEarth Ventures, Ora Global, Capricorn Investment Group, and VoLo Earth Ventures. The company will use the funding to scale its operations, continue development work, and construct a pilot smelting facility.

Magrathea Metals Inc. uses brine to create magnesium, the lightest structural metal that also sequesters carbon in the sea at the end of its life cycle, allowing the automotive and structural sectors to minimize their carbon footprint and construct a genuinely sustainable supply chain. The company offers users the facility of recycling, unlike carbon fiber composites. In addition, the firm supports the health of humans, animals, and plants.

## Funding rounds

- Series A, May 5, 2026, $24M — Capricorn Investment Group, VoLo Earth Ventures, Audacity, Oxcart Ventures, WovenEarth Ventures, Balerion Space Ventures, Avila VC, Ora Global
- Seed, Jun 7, 2023, $10M — EQT, Capricorn Investment Group, Valor Equity Partners, Necessary Ventures, VoLo Earth Ventures, UNTITLED, Counteract, HyperGuap, Exor Ventures

## Investors

- EQT (https://capitalatlas.ai/funds/eqt) — Seed
- Capricorn Investment Group (https://capitalatlas.ai/funds/capricorn-investment-group) — Seed, Series A
- Valor Equity Partners (https://capitalatlas.ai/funds/valor-equity-partners) — Seed
- Necessary Ventures (https://capitalatlas.ai/funds/necessary-ventures) — Seed
- VoLo Earth Ventures (https://capitalatlas.ai/funds/volo-earth-ventures) — Seed, Series A
- UNTITLED (https://capitalatlas.ai/funds/untitled) — Seed
- Counteract (https://capitalatlas.ai/funds/counteract) — Seed
- HyperGuap (https://capitalatlas.ai/funds/hyperguap) — Seed
- Exor Ventures — Seed
- Audacity (https://capitalatlas.ai/funds/audacity) — Series A
- Oxcart Ventures (https://capitalatlas.ai/funds/oxcart-ventures) — Series A
- WovenEarth Ventures (https://capitalatlas.ai/funds/wovenearth-ventures) — Series A
- Balerion Space Ventures (https://capitalatlas.ai/funds/balerion-space-ventures) — Series A
- Avila VC (https://capitalatlas.ai/funds/avila-vc) — Series A
- Ora Global (https://capitalatlas.ai/funds/ora-global) — Series A