Aymium produces high‑purity, carbon‑negative biocarbon and biohydrogen via a non‑combustion process that converts sustainably sourced waste biomass. Its products are engineered to drop in for fossil coal without plant modifications and are powered by self‑generated renewable energy. The company’s technology is protected by more than 600 issued and pending patents. Aymium operates and is constructing multiple production facilities in North America and is headquartered in Minnesota. Current investors include Sandton Capital, Steel Dynamics, Rio Tinto, Nippon Steel Trading and Hokuriku Electric Power Company. The company recently completed a five‑year financing that refinanced existing debt and added liquidity to accelerate growth and development of new biocarbon and biohydrogen facilities. Aymium produces renewable biocarbon and biohydrogen products made from sustainably sourced biomass, primarily recovered and unusable wood. Its products are designed to replace emission-heavy fossil fuels such as coal and coke in metals production, energy, crop applications, and in the purification of water and air without modifications to existing equipment or processes. The company’s bioproducts are renewable and carbon-negative. Aymium is led by CEO James Mennell and its technology is supported by more than 500 issued or pending patents globally. The company closed a $50M debt financing and intends to use the proceeds to support continued capacity growth, research and development, and the expansion of its patent portfolio. Aymium manufactures high-purity biocarbon and biohydrogen using a patented, non-combustion integrated thermolysis process that converts sustainably sourced biomass into carbon-negative inputs. Its products are engineered to replace coal or coke in steel and metals production with no plant modifications. The company holds more than 250 issued and pending patents globally and operates the largest advanced biocarbon production facility in North America near Marquette, Michigan. Aymium is headquartered in Minnesota and produces bioproducts that recover and recycle water and are powered by self-generated renewable energy. The firm is expanding capacity with new facilities planned in Williams, California and the Pacific Northwest, projected to be operational in 2023 and employ over 125 people combined. Production from those plants is contracted through 2037 and is projected to reduce over 1.4 million tons of CO2 per year.

Total raised

$200M

Funding rounds

3

Latest round

Debt Financing

Latest activity

Feb 2025