Facts
- Sectors
- Industrial technology, Agriculture, Climate / Carbon removal, Fertilizer
- Stage
- Pre-seed
Mafix raises $5.4M pre-seed led by Azolla Ventures to commercialize carbon-negative silicon fertilizers
Mafix, a Seattle-based maker of carbon-negative silicon fertilizers and mineral products, raised $5.4M in a pre-seed round led by Azolla Ventures on August 24, 2026. The company will use proceeds to demonstrate production of 1,000 tons of fertilizer, scale its mineral conversion process across feedstocks, and develop next-generation products.
Jade Marcus announces Mafix closed a $5.4M+ pre-seed round to scale silicate-rock fertilizer
Mafix announced it closed a $5.4M+ pre-seed round to scale production of a silicate-rock-based fertilizer that rebuilds soil health, raises yields, and permanently removes CO₂ as it breaks down. Funding will expand their chemistry platform and team, led by investors including Azolla Ventures and Counteract.
Mafix raises $5.4M pre-seed to commercialize silicon fertilizer that boosts soil health and removes CO2
Mafix, a Stanford spin-out, raised $5.4 million in a pre-seed round to scale production of a silicon-based fertilizer that speeds silicate rock weathering for soil and crop benefits and can convert CO2 to stable bicarbonate. The Seattle agtech will use cement kilns to produce at least 1,000 tons for larger field trials while leveraging idle kiln capacity to reduce scale-up costs.
Mafix raises $5.4M pre-seed to commercialize silicon fertilizers that remove CO2 and boost crop yields
Mafix raised $5.4 million in pre-seed funding led by Azolla Ventures to commercialize silicon-based fertilizers that accelerate rock weathering, remove atmospheric CO2 as stable bicarbonate, and improve soil health and crop yields.
Mafix raises $5.4M pre-seed led by Azolla Ventures to commercialize carbon‑negative silicon fertilizers and scale a 1,000‑ton demo
Mafix, a Stanford-developed industrial startup, raised $5.4M in pre-seed funding led by Azolla Ventures to commercialize a proprietary process that converts abundant silicate rocks into carbon-negative silicon fertilizers; the company will produce a 1,000-ton demonstration batch to restore soil health, boost yields, and sequester CO2 as stable bicarbonate.
