Arbor Energy

• 22/10/2025
• Series A
• $55,000,000

Arbor designs high-performance energy systems to power a livable, abundant future.

Our compact turbine system HALCYON delivers carbon-neutral baseload power with zero operating emissions. Each 25 megawatt (MW) unit combines oxy-combustion and supercritical CO₂ technology for high thermal efficiency, a small footprint, and rapid deployment. It’s fuel-flexible by design, able to run on natural gas today, and in time, on carbon-negative fuels like organic waste. HALCYON systems can run independently or be linked together into 100 MW+ plants, meeting the urgent need for clean, firm power in the places legacy suppliers have left behind.

Founded by aerospace engineers and systems thinkers, Arbor brings deep experience from rocket propulsion and turbomachinery to the urgent work of sustaining life on Earth. We believe the tools we build today should serve generations to come—and that progress, done right, can be both powerful and restorative.

If you’re ready to build systems that matter alongside kind, curious people committed to doing meaningful work well, we’d love to hear from you. We’re backed by leading climate investors including Gigascale Capital, Voyager Ventures, Lowercarbon Capital, and Cantos Ventures.

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