Company
Magrathea
Magrathea is a technology company run by engineers that has developed a new generation of electrolytic process for making clean, secure magnesium metal from seawater and brines.
Also known as Magrathea Metals Inc.
- Status
- Operatingas of 2026-09-17
- Business model
- B2B
- Customers
- customers, government agencies, and capital partners
- Legal name
- Magrathea Metals Inc.
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Record updated 17 September 2026
About
Magrathea is a technology company founded in California that has developed a new generation of electrolytic process for making clean, secure magnesium metal from seawater and brines.
Funding snapshot
- Total raised
- $24MSum of rounds, as of 2026-09-17Source (opens in a new tab)
- Latest round
- Series A, $24M2026-03
Funding rounds
- Series A
- $24M2026-03, Company stated
- Round, 2022
- $2M2022-03-02, SEC form D sold, 26 investors
Products
- Hardware
- magnesium metal
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