Carbon Capture Startup Secures $800M as Corporate ESG Spending Surges

In one of the biggest climate tech funding rounds of 2026, Swiss carbon capture pioneer Climeworks has secured $800 million in a Series D round led by a coalition of sovereign wealth funds and corporate venture arms. The investment reflects a sharp acceleration in corporate ESG spending, with demand for permanent carbon removal credits projected to exceed supply by 400% by the end of the decade.

The round was co-led by Singapore's Temasek and Microsoft's Climate Innovation Fund, with participation from BlackRock, NextEra Energy, and existing investor Partners Group. Climeworks plans to deploy the capital to scale its direct air capture (DAC) facilities in the United States, Norway, and Kenya, aiming to increase annual removal capacity to 2 million metric tons of CO₂ by 2028 – a tenfold increase from current levels.

“This funding validates that direct air capture is moving from pilot phase to industrial-scale reality,” said Jan Wurzbacher, co-founder and co-CEO of Climeworks. “Our corporate clients are no longer buying offsets for marketing; they are integrating permanent removal into their core decarbonization strategies.”

Why ESG budgets are finally unlocking DAC

After years of skepticism about high costs (currently $600–$1,000 per ton of CO₂), several factors have shifted the economics. The U.S. Inflation Reduction Act's 45Q tax credit was expanded in late 2025 to $180 per ton for DAC, while the EU's Carbon Border Adjustment Mechanism has effectively priced industrial carbon at over €120 per ton. Major buyers – including Microsoft, Stripe, and JPMorgan Chase – have pre-purchased removal credits through Frontier, an advanced market commitment that has now grown to $1.5 billion.

“We're witnessing a tipping point,” said Maria Lemos, head of climate investments at BlackRock. “The compliance and voluntary markets are converging, and DAC offers the only verifiable, permanent removal pathway at scale.” BlackRock committed $200 million to the round, its largest single climate tech investment to date.

Competition heats up in carbon removal

Climeworks is not alone. Rivals including Heirloom, CarbonCapture Inc., and the UK's Mission Zero have raised over $2 billion combined in the first half of 2026. However, Climeworks' operational head start – its Orca and Mammoth plants in Iceland have been running since 2021 – gives it a significant data advantage. The company's cost per ton has already dropped by 34% in two years, and its new modular “Generation 3” collectors, unveiled in March, promise a 50% further reduction by 2027.

The investment also triggers a secondary market boom. Carbon credit prices for permanent removal on platforms like CME Group's new DAC futures contract have tripled in the past 18 months, now trading at $220 per ton. Analysts at BloombergNEF predict the total DAC market could reach $50 billion annually by 2035.

What this means for investors and businesses

For institutional investors, Climeworks' round signals a maturation of the carbon removal sector. The company is now valued at $4.5 billion, up from $1.8 billion in its 2023 Series C. But more importantly, the investor syndicate includes pension funds and insurance giants – a sign that long-duration assets are entering the space. “We view DAC infrastructure as analogous to renewable energy in the early 2010s,” said a Temasek spokesperson. “The returns are back-ended, but the physical asset durability and regulatory tailwinds are compelling.”

For corporate buyers, the message is clear: waiting may cost more. With DAC capacity constraints looming, major airlines, shipping lines, and tech firms are locking in multi-year offtake agreements. Climeworks announced that it has already pre-sold 70% of its 2028–2032 removal capacity through contracts with a minimum price floor of $180 per ton.

The deal is expected to close in July 2026, with Climeworks also exploring a potential SPAC or traditional IPO in late 2027. For now, the $800 million injection cements carbon capture as a cornerstone of the net-zero economy – and a legitimate asset class for growth-stage investors.