Participated · Seed · Aug 2026

Mafix develops a mineral conversion process that transforms abundant silicate rocks into silicon-based fertilizers that weather within a single growing season, releasing nutrients and removing CO2 as stable bicarbonate. The company is commercializing a first-generation climate-smart fertilizer and plans a commercial demonstration to produce 1,000 tons of product. Mafix’s manufacturing approach repurposes spare capacity in existing cement kilns to avoid building new facilities and to access established logistics hubs. The technology was developed at Stanford University and the company was co-founded by Jade Marcus and Dr. Matthew Kanan. Mafix raised $5.4 million in a pre-seed round to fund the demonstration, further R&D across additional feedstocks, and development of next-generation mineral products and applications.

Participated · Series A · May 2026

CREW Carbon offers a process intensification solution for wastewater treatment that uses strategically-sourced alkaline minerals to optimize pH and alkalinity, improving biological performance, settleability, and plant capacity while permanently sequestering CO2. Since beginning commercial operations in 2024, CREW has deployed at nearly 10 facilities across the U.S. and Europe and secured long-term RFPs with utilities. The company has captured over 2,000 tons of CO2 and secured more than $33 million in carbon removal offtake agreements, delivering verified carbon removal credits to corporate buyers. CREW has developed proprietary measurement, reporting, and verification (MRV) capabilities and is developing a scalable analytics platform to provide operational insights and process optimization. Financial and strategic support from the Series A will be used to scale deployments, expand customer engagements, and add key hires in wastewater process, technology, supply chain, and business development.

Participated · Series A · Jul 2025

Chloris Geospatial provides science‑based forest carbon insights by combining satellite data, proprietary sensor fusion, and machine learning to measure vegetation and biomass dynamics back to 2000. Its platform delivers high‑integrity, timely data for every acre of forest to support corporate carbon accounting, project developers, and market standards. The company will use the new funding to accelerate product development and expand its commercial and technical teams. Chloris plans to deepen partnerships across the carbon value chain and expand operations with a new European hub to support regional growth. Clients include corporations monitoring forest‑risk supply chains, nature‑based solution developers, and carbon market standard setters. Chloris Geospatial develops forest carbon measurement and monitoring technology that leverages artificial intelligence and machine learning to generate forest carbon insights. Its platform tracks biomass dynamics—from deforestation and degradation to tree growth—at scales from field to continental. Customers and stakeholders include governments, companies, civil society organizations, indigenous peoples, and local communities seeking to understand impacts on forest carbon projects and supply chains. The company said it will use the new funding to support continued commercial growth. CEO Marco Albani leads the company, which is based in Boston, MA. Adam Gibbon, Natural Capital Lead at AXA IM Alts, joined Chloris’s board of directors. Chloris Geospatial measures natural capital from space and provides science-based forest carbon insights. Led by CEO Marco Albani, the company builds its product with Earth observation data and machine learning to reliably assess forest carbon dynamics, including forest growth and degradation. Its core offering uses satellite data to estimate forest carbon and track changes over time. The company plans to use the recent funding to advance sensor-fusion technology and equip customers with globally consistent estimates for 2000–2022. Chloris also intends to extend spatial coverage and grow customer support services with the funds.

Participated · Series A · Mar 2025

Mote’s core product is its patented Biomass Carbon Removal and Storage (BiCRS) technology that converts agricultural and forestry waste into clean hydrogen and other energy outputs while permanently sequestering CO₂. The company’s innovations increase hydrogen production, enhance efficiency, and reduce emissions, positioning the technology as a scalable carbon-negative energy solution. Mote’s process is spun out of research at Lawrence Livermore National Laboratory and has garnered support from the U.S. Department of Energy, CalFire, and the U.S. Forest Service. The technology targets sectors that rely on hydrogen, including transportation, industrial manufacturing, and energy storage, and aims to strengthen domestic energy independence and grid resilience. Near-term plans include advancing Mote’s first commercial-scale facility, expanding engineering capabilities, and accelerating strategic partnerships across the hydrogen, forestry, and energy sectors. The company emphasizes co-benefits for forestry and land management, wildfire prevention, and local economic development through a circular-economy approach. Mote Hydrogen develops a gasification process that heats wood waste and forest biomass in a low-oxygen oven to produce hydrogen while converting and capturing CO/CO2 for underground storage. The company plans a roughly $100 million gasification plant in Kern County to leverage local geology for permanent CO2 sequestration. Mote says the plant could process and store up to 150,000 tons of CO2 per year and produce up to 5,000 tons of hydrogen annually. It launched in early 2020 and has raised a little over $1 million in seed funding from investors including Preston-Werner Ventures and Counteract Partners. The startup is seeking additional equity and construction financing as it pursues public approvals for the project. Mote intends to monetize emissions reductions via California’s Low Carbon Fuel Standard credits and federal incentives such as the 45Q tax credit.

Participated · Seed · Sep 2024

Phlair develops direct air capture (DAC) machines that use a pH-swing method: a basic solvent absorbs CO2 and an acid swing releases it, with solvent regeneration handled by a proprietary hydrolyzer. The hydrolyzer draws on membrane electrolyzer and fuel-cell technology to produce acids and bases rather than hydrogen. Phlair is deploying a pilot that can capture around 10 metric tons of CO2 per year and is planning larger 260-metric-ton plants scheduled to come online in late 2025. One of the larger plants will deliver carbon for a cement additive in the Netherlands with partner Paebbl, and another will be built in Canada with developer Deep Sky for storage. The startup has sold carbon credits to Frontier, which coordinates advanced market commitments with companies like Alphabet, Meta, Shopify, and Stripe. Phlair was formerly known as Carbon Atlantis and is led by co-founder and CEO Malte Feucht.