Microsoft Expands World’s Largest Carbon Removal Deal with Stockholm Exergi to 5M Tonnes

• World’s largest annual CDR delivery deal: Microsoft'’s expanded agreement now totals 5.08M tons, with 500,000 tons captured annually.

• $1.3B BECCS facility operational by 2028: Stockholm Exergi’s plant will permanently store biogenic CO₂ beneath the North Sea.

• Significant climate leadership signal: Microsoft doubles down on durable carbon removal as part of its aggressive net-zero strategy.

Microsoft has more than doubled its carbon removal commitment with Stockholm Exergi, increasing the volume of carbon dioxide to be permanently stored from 3.3 million tons to 5.08 million tons over a 10-year period.

The agreement centers on Stockholm Exergi’s Bioenergy with Carbon Capture and Storage (BECCS) facility, currently under construction near Värtaverket in Stockholm. Slated to be operational by 2028, the \$1.3 billion plant will be capable of removing up to 800,000 tons of CO₂ annually—surpassing emissions from all road traffic in Stockholm over the same timeframe.

“This agreement is the world’s largest, calculated in terms of annual deliveries,” said Stockholm Exergi in a company statement.

Captured biogenic CO₂ will be temporarily stored before transport to Norway, where it will be permanently injected underground in the North Sea. This part of the operation is backed by the Northern Lights project, a cross-border carbon transport and storage initiative by Equinor ASA, Shell Plc, and TotalEnergies SE.

“Microsoft’s choice to extend its agreement with us shows strong confidence in our bio-CCS project and our ability to deliver sustainable, permanent negative emissions,” said Anders Egelrud, CEO of Stockholm Exergi. “It is also a clear signal that companies with high climate ambitions in the voluntary market continue to focus on combating climate change and on building up the industry for negative emissions.”

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This expansion underscores Microsoft’s leadership in the voluntary carbon market and complements a string of recent deals in the CDR space. In the last month alone, Microsoft signed agreements with Carba, Living Carbon, AtmosClear, Fidelis, and CO280, with the latter involving a 3.685M-ton deal targeting the U.S. pulp and paper sector.

For Microsoft, the expanded partnership reinforces its goal of becoming carbon negative by 2030 and driving market development for high-durability carbon removal solutions.