What They Do

Mafix is making minerals that boost crop yields and remove CO₂. Their proprietary process leverages existing industrial infrastructure and abundant minerals, transforming them into a carbon negative fertiliser. When applied to farmland, these minerals dissolve rapidly, releasing plant-available silicon, an important nutrient for plant resilience and yield, and driving CO₂ removal in soils. Multiple agronomic data from 3rd parties show the real, measurable yield uplift in corn.

Why It Matters

We have always been cautious on enhanced rock weathering. Our analysis suggests the economics of basalt and olivine weathering only work in goldilocks conditions: cheap or free finely ground feedstock, short transport distances and near-perfect climate. Slow weathering rates compound this, adding delayed cashflows, upfront capital costs and years of expensive MRV.

Mafix has solved for this. Backed by CEO Jade Marcus and Professor Matt Kanan's research at Stanford, their mineral activation approach drives materially faster dissolution, weeks rather than years. This matters in two ways. Carbon removal value is realised within a single growing season rather than an uncertain multi-year tail, shrinking the MRV cost and cashflow delay that have kept us on the sidelines. And the minerals carry real agronomic value to farmers, demonstrated in multi-year field data, giving farmers a real reason to use them.