Heirloom, America’s leading Direct Air Capture (DAC) technology provider, has raised $150 million in Series B funding for scaling affordable carbon removal solutions. The funding round was co-led by Future Positive and Lowercarbon Capital, with participation from prominent industrial investors like Japan Airlines, Mitsubishi Corporation (Americas), Mitsui & Co., Siemens Financial Services, and others representing hard-to-decarbonise sectors such as automotive, shipping, aviation, and advanced manufacturing.
This latest funding will be used to reduce the cost of Heirloom’s DAC technology, develop additional projects, and pave the way for future infrastructure investments. “We’re honoured to receive this vote of confidence from new and repeat investors alike,” said Shashank Samala, CEO of Heirloom. “We believe DAC is all about cost—lowering it is key to scaling and making a meaningful impact on climate change. Through our real-world deployments and technological advancements, we’re proving Heirloom’s trajectory to deliver the lowest-cost DAC solution while driving real results.”
New Series B investors include Future Positive, H&M Group, Japan Airlines Co., Mitsubishi Corporation (Americas), Mitsui & Co., MOL Switch LLC, Quantum Innovation Fund, and Siemens Financial Services. Returning investors include climate-focused leaders like Breakthrough Energy Ventures, Carbon Direct Capital, Ahren Innovation Capital, Lowercarbon Capital, and MCJ Collective.
Since its founding in 2020, Heirloom is part of the team behind Project Cypress, a Department of Energy-backed DAC Hub in Louisiana eligible for up to $600 million in funding. This initiative aims to remove 1 million tons of CO2 annually while creating nearly 1,000 jobs. Heirloom also operates North America’s first commercial DAC facility in Tracy, California, and has secured major carbon removal deals with Microsoft, Stripe, Meta, Shopify, JPMorgan, McKinsey, H&M Group, and others.
Heirloom’s process uses limestone—a low-cost, abundant mineral—to capture CO2 directly from the air. The company accelerates limestone’s natural ability to absorb CO2, reducing the process from years to just three days. Using renewable energy, the CO2 is then permanently stored underground, creating a scalable and sustainable pathway to address climate change. With this latest funding, Heirloom aims to further cement its position as a leader in the carbon removal industry, demonstrating its potential to deliver meaningful climate impact at scale.
