Total amount raised
$204.3 Million
Latest funding date
02/01/2025
Location
Heirloom has successfully raised funding over 7 rounds, with the latest round being undisclosed. The company is backed by 30 investors, including the Development Bank of Japan and Chiyoda Corporation.
Heirloom's innovative approach leverages the natural process of carbon mineralization using limestone to remove CO₂ from the atmosphere. Keep reading to explore the intricacies of Heirloom's fundraising journey and the investors backing this pioneering platform.
What Is Heirloom?
Heirloom, based in Brisbane, California, is a private company specializing in direct air capture technology to enhance the natural process of CO₂ absorption from the atmosphere. The company operates in industries such as carbon capture, mineral, mining technology, and sustainability.
Founded with a mission to combat climate change, Heirloom employs a unique approach using limestone to accelerate carbon mineralization. The company has a workforce of 101-250 employees and operates Direct Air Capture facilities in Louisiana and California, powered by renewable energy.
How Much Funding Has Heirloom Raised?
- Undisclosed Round
- Amount Raised: Not publicly disclosed
- Date: December 2025
- Lead Investors: Chiyoda Corporation, Development Bank of Japan
- Valuation at Round: Not publicly disclosed
- Motivation Behind the Round: To further develop and scale their direct air capture technology.
- Series Unknown
- Amount Raised: Not publicly disclosed
- Date: February 2025
- Lead Investors: United Airlines Ventures
- Valuation at Round: Not publicly disclosed
- Motivation Behind the Round: To expand their carbon capture capabilities and partnerships.
- Series B
- Amount Raised: USD 150,000,000
- Date: December 2024
- Lead Investors: Future Positive, Lowercarbon Capital
- Valuation at Round: Not publicly disclosed
- Motivation Behind the Round: To reduce the cost of their technology, develop additional projects, and secure infrastructure capital.
- Grant
- Amount Raised: USD 1,000,000
- Date: April 2022
- Lead Investors: Not publicly disclosed
- Valuation at Round: Not publicly disclosed
- Motivation Behind the Round: To support early-stage development and research.
- Series A
- Amount Raised: USD 53,000,000
- Date: March 2022
- Lead Investors: Ahren Innovation Capital, Breakthrough Energy Ventures
- Valuation at Round: Not publicly disclosed
- Motivation Behind the Round: To accelerate the commercialization of their direct air capture technology.
- Grant
- Amount Raised: USD 255,737
- Date: June 2021
- Lead Investors: National Science Foundation
- Valuation at Round: Not publicly disclosed
- Motivation Behind the Round: To fund initial research and development efforts.
- Seed
- Amount Raised: Not publicly disclosed
- Date: May 2021
- Lead Investors: Not publicly disclosed
- Valuation at Round: Not publicly disclosed
- Motivation Behind the Round: To establish the company and begin early-stage development.
Total Amount Raised: USD 204,255,737
Current Valuation: Not publicly disclosed
Key Investors
- Development Bank of Japan
- Details: The Development Bank of Japan is a government-owned financial institution that provides long-term funding and support for various sectors. It has been a key investor in Heirloom, participating in multiple funding rounds.
- Investment Focus Areas: Infrastructure, energy, technology.
- Notable Investments: Not publicly disclosed.
- Chiyoda Corporation
- Details: Chiyoda Corporation is a global engineering company specializing in energy and chemical plant construction. It is one of the most recent investors in Heirloom.
- Investment Focus Areas: Energy, chemicals, infrastructure.
- Notable Investments: Not publicly disclosed.
- Future Positive
- Details: Future Positive is a venture capital firm focused on investing in companies that aim to solve global challenges. It co-led Heirloom's Series B funding round.
- Investment Focus Areas: Innovative solutions, sustainability, technology.
- Notable Investments: Not publicly disclosed.
- Lowercarbon Capital
- Details: Lowercarbon Capital is a venture capital firm that invests in companies working on climate change solutions. It co-led Heirloom's Series B funding round and also invested in the Series A round.
- Investment Focus Areas: Climate change, carbon removal, sustainability.
- Notable Investments: Not publicly disclosed.
- United Airlines Ventures
- Details: United Airlines Ventures is the corporate venture arm of United Airlines, focusing on strategic investments in innovative technologies. It led a funding round for Heirloom in February 2025.
- Investment Focus Areas: Aviation, sustainability, technology.
- Notable Investments: Not publicly disclosed.
What's Next for Heirloom?
Heirloom stands at the cusp of significant opportunities, driven by its innovative Direct Air Capture (DAC) technology. With a substantial $150 million Series B funding and involvement in Project Cypress, which is eligible for up to $600 million in government funding, the company is well-positioned to scale its operations. The project aims to remove one million tons of CO₂ annually and create nearly 1,000 jobs in Louisiana, highlighting the vast potential for growth in the climate-tech sector.
Future fundraising opportunities appear promising as Heirloom continues to attract investment from both private and public sectors. The company's strategic partnerships with major corporations like Microsoft, Stripe, and Meta further bolster its financial prospects. However, challenges such as reducing the cost of DAC technology, scaling operations, and navigating regulatory landscapes remain. Overcoming these hurdles will be crucial for Heirloom to fully capitalize on its growth potential and continue leading in the carbon removal industry.
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