Boston Metal
About Boston Metal
Boston Metal is a Cleantech startup based in Woburn that has raised $337M in venture capital across 2 funding rounds since 2013. The company reached Series C stage in with a $262M round led by institutional investors. Boston Metal's investor base includes 10 institutional funds, with its lead investor leading the most recent equity round.
Boston Metal is a Woburn, Massachusetts-based advanced materials company founded in 2013 as a spinout from MIT. The company has developed Molten Oxide Electrolysis (MOE), a patented electrified platform for metals production that operates across a wide range of metal oxides and diverse feedstocks including metallurgical and industrial waste streams. MOE enables scalable, cost-effective production of critical metals such as niobium, tantalum, tin, vanadium, nickel, and chromium, as well as green steel. Boston Metal operates a wholly-owned subsidiary in Brazil (Boston Metal do Brasil) near São João del Rei, Minas Gerais, focused on critical metals production. The company has raised over $500 million in total funding and in March 2025 successfully commissioned its first industrial-scale MOE cell at its Woburn headquarters.
Boston Metal Funding Rounds Timeline
2 rounds · $337M raised · since 2013
| Round | Date | Amount | Valuation | Lead investor | Co-investors |
|---|---|---|---|---|---|
| Series C | $262M | — | — | Breakthrough Energy Ventures, Aramco Ventures, M&G Investments, Baillie Gifford, Goehring & Rozencwajg, Microsoft Climate Innovation Fund, BHP Ventures, Prelude Ventures | |
| Series C | $75M | — | — | Tata Steel Limited, Climate Investment, Prelude Ventures |
Investors in Boston Metal
10 institutional investors across 2 rounds
Co-investors
Recent news about Boston Metal
- FundingBoston Metal Raises $75 MillionMay 2026
Questions about Boston Metal
How much has Boston Metal raised?
Boston Metal has raised $337M across 2 funding rounds since 2013.
Who are the investors of Boston Metal?
Boston Metal's investors include Aramco Ventures, BHP Ventures, Baillie Gifford, Breakthrough Energy Ventures, Climate Investment, Goehring & Rozencwajg, M&G Investments, Microsoft Climate Innovation Fund, Prelude Ventures, Tata Steel Limited.
When was Boston Metal's last funding round?
Boston Metal's most recent round was a $262M Series C in .
Where is Boston Metal headquartered?
Boston Metal is headquartered in Woburn, and was founded in 2013.