Mass Magnetics
Mass Magnetics turns recycled rare-earth scrap into high-performance neodymium-iron-boron permanent magnets, made in the United States.
- Category
- Deep Tech
- Fund
- NZVC SPV
- Website
- www.massmagnetics.com
What Mass Magnetics does
Mass Magnetics's feedstock is already refined and alloyed, and its process takes powder to a fully dense magnet in about sixty seconds, at grades up to N52. Because the milling and sintering happen in the United States, its magnets comply with DFARS 252.225-7052, the rule that bars magnets produced in China and other covered countries from US defense deliverables from 2027. Eric Silver and Matthew Groll founded it, it operates from Greentown Labs near Boston and from Columbus, Indiana, and it went through Y Combinator's Summer 2026 batch.
The secret behind Mass Magnetics
The hard part of a rare-earth supply chain is refining, and nearly all of it happens in China. Scrap magnets are already refined and alloyed, so recycling them skips the step the rest of the world cannot yet do at scale.
Why NZVC invested in Mass Magnetics
We backed Mass Magnetics because every drone, robot and electric motor needs permanent magnets, and from 2027 the US defense market cannot buy them from China. A domestic supply made from scrap can be built faster and with less capital than a new mine and refinery, and Mass Magnetics is already taking preorders from manufacturers who need to comply.