Prometheus Materials, a leader in low- and carbon-negative cement technologies, today announced a 10-year strategic partnership with Green Stream Algae (GSA) , with two five-year extension options, establishing GSA as its exclusive microalgae and biomineral supplier in North America and South America to support the scale-up of its ProZEROâ„¢ low-carbon cement technology and secure long-term supply of its core biological inputs.
LONGMONT, Colo., May 7, 2026 /PRNewswire-PRWeb/ -- , a leader in low- and carbon-negative cement technologies, today announced a 10-year strategic partnership with Green Stream Algae (GSA), with two five-year extension options, establishing GSA as its exclusive microalgae and biomineral supplier in North America and South America to support the scale-up of its ProZEROâ„¢ low-carbon cement technology and secure long-term supply of its core biological inputs.
The partnership marks the evolution of a longstanding supplier relationship into a deeper collaboration. GSA, which has supplied algae and biomineral to Prometheus Materials, is now a strategic partner and investor in the company.
The agreement establishes a long-term, scalable supply foundation for ProZEROâ„¢ as Prometheus Materials expands production to meet growing demand for sustainable, low-carbon concrete solutions.
Microalgae and biomineral are core constituents of ProZEROâ„¢, Prometheus Materials' supplemental cement blend designed to replace a portion of cement in a one-to-one ratio.
"GSA has been a trusted supplier of microalgae and biomineral to our company, and this partnership reflects a major step forward in scaling our technology and delivering reliable, low-carbon cement solutions at commercial scale," said Loren Burnett, President, CEO, and Co-founder of Prometheus Materials.
For GSA, the partnership represents an opportunity to expand the role of microalgae into a new class of environmental solutions for real-world applications.
"This partnership reflects a shared view that sustainable materials can play a meaningful role in solving complex industrial challenges," said Todd Hansen, CEO of Green Stream Algae. "The solutions exist in the natural world, and as demonstrated by Prometheus Materials, they can be practical, usable, and scalable in the construction industry today."
ProZEROâ„¢ integrates into existing concrete production processes without requiring major changes to infrastructure or workflows. Together, Prometheus Materials and GSA aim to accelerate the adoption of more sustainable construction materials at scale.
About Prometheus Materials
Prometheus Materials developed and is currently producing low- and carbon-negative cement technologies for the global construction industry. Its flagship product, ProZEROâ„¢, is a low-carbon blended cement that replaces a portion of traditional cementitious material in a one-to-one ratio, enabling significant reductions in embodied carbon. Designed for real-world use, ProZEROâ„¢ integrates seamlessly into existing ready mix concrete production processes without requiring changes to infrastructure or operations. By combining high carbon-reduction efficiency with supply-chain flexibility, Prometheus Materials is advancing scalable solutions for more sustainable construction.
About Green Stream Algae (GSA)
Green Stream Algae (GSA) is a U.S.-based producer of sustainably cultivated microalgae, grown in large-scale outdoor pond systems using non-arable land and non-potable water resources. With over a decade of research and development, including collaboration with academic institutions, GSA produces high-quality algae for a range of commercial applications. The company's scalable and resource-efficient cultivation approach supports the use of microalgae as a renewable input across nutraceutical, animal feeds, human nutrition, and sustainable industrial industries.
Media Contact
Jaclyn Gruber, Prometheus Materials, 1 303-351-1832, [email protected],
SOURCE Prometheus Materials
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