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M
Minus Materials
Grows 'biogenic limestone' from calcifying microalgae (coccolithophores) as a carbon-negative replacement for quarried limestone in cement.
Low-Carbon Materials
Funding
Small/grant-based: $125K CU Lab Venture Challenge, undisclosed SOSV seed, $175K 4 Corners grant (2024), $100K pilot grant. No priced VC round confirmed.
Stage
Early (Seed)
HQ
Boulder, CO
Founded
2021
The Current Angle
Co-founded by CU Boulder scientist Wil Srubar (also a Prometheus Materials co-founder) after a honeymoon snorkeling trip inspired the idea; CEO is Sarah Williams. Has run pilots with Microsoft and Boulder Ready-Mix Concrete.
Leadership
- WSWil SrubarCo-Founder & CEO
Links
Snapshot
- Target customer
- Cement/concrete producers
HQ location
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