Microsoft has purchased 28,900 tonnes of permanent carbon removal from UNDO, supported by pioneering debt financing from Inlandsis, a Canadian climate fund managed by Fondaction Asset Management. Following 5,000 tonnes in 2023 and 15,000 tonnes in 2024, this third purchase brings Microsoft's total commitment with UNDO to nearly 49,000 tonnes.

Industry-First Financing Structure

This deal represents an industry first, with Inlandsis providing a novel financing structure that supplies the capital needed to fully deliver on this purchase, with the scope to scale further high-integrity enhanced rock weathering (ERW) projects globally. According to Jim Mann, UNDO's Founder and CEO, “Innovative financing is the catalyst for unlocking gigatonne-scale carbon removal. The support of Inlandsis shows how financial backers can help transform carbon removal into a genuine asset class, one that is scalable, tradable, and investable.”

Mann emphasized that by combining financial innovation, strategic partnerships, and bleeding-edge science, UNDO is accelerating deployment and delivering both climate and agricultural benefits in Ontario and beyond. The financing is designed to achieve the gigatonne-scale carbon removal needed to keep warming below 1.5 °C, requiring not just science but also scalable finance.

Progressive Partnership with Microsoft

The relationship between Microsoft and UNDO has grown season by season. In 2023, Microsoft made its first-ever ERW purchase with a 5,000-tonne contract. In 2024, Microsoft followed with 15,000 tonnes and funding for vital science. Today's agreement for 28,900 tonnes is the biggest yet, reflecting evidence-led growth, increased confidence in ERW, and trust in delivery that holds up to scrutiny.

Phillip Goodman, Director, Carbon Removal Portfolio at Microsoft, explained the rationale: “Enhanced rock weathering is a promising pathway to gigatonne-scale carbon removal. UNDO's commitment to scientific rigour gives us confidence in both the durability of these credits and their role in helping Microsoft achieve its goal of being carbon negative by 2030.”

Milestone Investment for Inlandsis

For Inlandsis, this marks key firsts: their first investment in an ERW project, and the first Canadian investment for their second fund. David Moffat, Managing Director at Inlandsis, noted: “Inlandsis is very pleased to provide capital to this strategic and innovative deal, helping to strengthen the growing relationship between Microsoft and UNDO while advancing the critical fight against climate change. This collaboration marks several milestones for us and highlights our commitment to advancing carbon finance across Canada and beyond.”

The purchase is underwritten by CFC, a specialist insurance provider that supports high-quality carbon market initiatives by mitigating risk and enabling transactions. Insurance is fast becoming a critical enabler for climate solutions such as ERW, providing both banks and investors with the confidence that projects will deliver, unlocking more capital for scaling operations.

Operational Implementation and Ground Delivery

Under this agreement, 90,000 tonnes of wollastonite will be spread, benefiting 30,000 acres of Canadian farmland. Deployment supports farm operations with familiar equipment and schedules, and is set up to report progress with transparency as seasons advance. Operations are practical, seasonal, and measured, with delivery planned to align with farms' planting and harvest schedules alongside local conditions.

Material quality is checked, spreading equipment is calibrated to target rates, and GPS logging records where and when applications occur. After application, field teams collect porewater and soil samples at defined locations and intervals, then move samples through validated lab workflows with a full chain of custody. The operational record connects load tickets, GPS traces, and lab results, creating a clear evidence chain from quarry to field to credit.

Scientific Approach and Measurement

Enhanced rock weathering accelerates a natural process where CO2 in rainwater reacts with silicate minerals, and the chemistry that follows leads to storage on geological timescales. Turning that pathway into verified credits requires measurement by design. Sampling plans are written in advance for statistical power, include controls, and specify when and where porewater and soils are analyzed.

Laboratory workflows are auditable, results pass quality checks, and every measurement is tied to time, location, and method. Accounting is conservative, with life cycle emissions for quarrying, processing, logistics, and MRV deducted, and uncertainty applied as a discount. Issuance follows delivery and verification, which means credits represent net, measured removal rather than a forecast.

Market Implications and Scalability

This structure meets the needs of various stakeholders: buyers want permanence, additionality, and verification; lenders want clear milestones and repayment tied to paid issuance; farmers want predictable, well-run operations that fit within crop calendars. The structure turns expected tonnes into delivered tonnes by making capital follow fieldwork and by making issuance follow evidence.

The same draw and repay logic can scale to larger volumes and additional regions as the operational base grows. With backing from leading brands such as Barclays, British Airways, and McLaren, UNDO is building the operating and scientific foundation to spread mineral-rich silicate rock at a massive scale in the years ahead, with a focus on transparent MRV and practical delivery.

The combination of Microsoft's multi-year purchasing, Inlandsis's delivery-aligned facility, CFC's derisking, and UNDO's on-the-ground delivery provides a strong foundation for steady execution. As volumes grow, the focus remains on delivering permanent, measured carbon removal with benefits for soils and farming communities.

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