Heimdal

Heimdal, a Tulsa, Oklahoma-based climate technology company, develops and operates direct air capture (DAC) facilities to remove carbon dioxide from the atmosphere at scale using renewable energy. The organization builds affordable, verified DAC systems primarily in the US, with its Bantam facility in Shidler, Oklahoma, currently America's largest, capturing over 5,000 tons of CO₂ annually. This captured CO₂ is then utilized for various industrial applications, including enhanced oil recovery, with the company's business model leveraging the Inflation Reduction Act's $180 per ton tax credit for removed carbon. Heimdal, which employs 12 individuals and has filed 1 patent, has formed a strategic partnership with Karbon-X Corp for ocean-based CO₂ sequestration and is notably backed by Sam Altman. The company was founded in 2020 by Marcus Lima.

High-Level Overview

Heimdal is a climate technology company specializing in affordable and verified direct air carbon capture and storage (DACCS). It designs and operates systems that capture CO₂ directly from the atmosphere using a novel process involving heated quarried limestone, which absorbs CO₂ and then releases it for storage or utilization. Heimdal’s flagship facility, Bantam in Oklahoma, is the largest DAC plant in the U.S., capable of capturing over 5,000 tons of CO₂ annually at a cost under $200 per ton, making it one of the most cost-effective DAC solutions globally. The company primarily serves industries and sectors aiming to meet decarbonization goals, with a current focus on enhanced oil recovery (EOR) as a use for captured CO₂, while planning to expand into permanent storage and other applications.

For an investment firm, Heimdal’s mission centers on scaling affordable carbon removal technologies to combat climate change profitably. Its investment philosophy emphasizes leveraging existing industrial materials and processes to reduce costs and accelerate deployment. Key sectors include climate tech, carbon capture, and sustainable energy infrastructure. Heimdal’s impact on the startup ecosystem is significant as it demonstrates a viable commercial pathway for DAC, encouraging further innovation and investment in carbon removal technologies.

For a portfolio company, Heimdal builds direct air capture machines that serve industries needing verified carbon removal solutions. It solves the problem of atmospheric CO₂ accumulation by providing scalable, cost-effective carbon capture and storage, addressing climate change mitigation. The company shows strong growth momentum, having rapidly deployed the largest U.S. DAC facility within a few years of founding and planning a much larger plant to capture one megaton of CO₂ annually by 2026.

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Origin Story

Founded in 2020 by Marcus Lima, who has a background in chemistry and energy systems engineering from the University of Oslo, Cambridge, and Oxford, Heimdal emerged from academic and consulting experience in climate infrastructure projects. Lima’s vision was to create a profitable, scalable DAC technology using abundant natural materials like limestone. Early traction came with the rapid development and commissioning of the Bantam facility in Shidler, Oklahoma, which became the largest DAC plant in the U.S. within a few years. The company’s evolution has been marked by strategic partnerships, such as with CapturePoint, and backing from prominent investors including Sam Altman, enabling it to scale operations and improve cost efficiency.

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Core Differentiators

• Innovative Process: Uses quarried limestone heated to produce calcium oxide, which absorbs CO₂ from air, then reheated to release concentrated CO₂ for storage or use.
• Cost Efficiency: Achieves capture costs below $200 per ton, among the lowest in the DAC industry.
• Scale: Operates the largest DAC facility in the U.S. with 5,000 tons annual capacity, with plans for a 1 million ton/year plant by 2026.
• Use of Existing Materials and Tech: Leverages widely available minerals and industrial heating processes, reducing complexity and capital costs.
• Pragmatic Commercial Focus: Currently uses captured CO₂ for enhanced oil recovery (EOR), providing immediate economic value while developing pathways for permanent sequestration.
• Strong Leadership and Expertise: Founded by Marcus Lima with deep technical and consulting experience in climate and energy sectors.
• Verified Carbon Removal: Emphasizes verified, permanent carbon capture aligned with emerging carbon credit markets.

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Role in the Broader Tech Landscape

Heimdal rides the accelerating global trend toward carbon removal technologies as governments and industries seek to meet net-zero targets. The timing is critical due to increasing regulatory pressure, carbon pricing mechanisms, and growing corporate commitments to carbon neutrality. Market forces favor Heimdal’s approach because it offers a scalable, cost-effective DAC solution using abundant materials and existing industrial processes, contrasting with more capital-intensive or experimental DAC methods. By demonstrating commercial viability and rapid deployment, Heimdal influences the broader ecosystem by validating DAC as a credible climate solution and encouraging investment and innovation in carbon removal infrastructure.

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Quick Take & Future Outlook

Heimdal is poised for significant growth with plans to scale from its current 5,000-ton facility to a megaton-scale plant by 2026, potentially transforming the DAC market. Future trends shaping its journey include advances in renewable energy integration to reduce operational emissions, expansion into permanent CO₂ storage, and participation in carbon credit markets that monetize verified removals. As carbon removal becomes a critical pillar of climate strategy, Heimdal’s influence is likely to grow, setting benchmarks for affordability and scalability in DAC technology. Its pragmatic approach balancing economic viability with environmental impact positions it as a key player in the transition to a carbon-neutral future.