Type One Energy is a Fusion Energy company founded in 2019 and based in Madison, USA. It has raised $82.5M in total funding, most recently a Seed in 2024.
| Date | Stage | Amount | Valuation | Lead investors |
|---|---|---|---|---|
| Jan 14, 2026 | Convertible | $87M | — | — |
| Jul 30, 2024 | Seed | $53.5M | — | Breakthrough Energy Ventures, GD1, Centaurus Capital |
| Mar 29, 2023 | Seed | $29M | — | Breakthrough Energy Ventures, TDK Ventures, Doral Energy-Tech Ventures |
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A 350 MWe commercial stellarator fusion power plant being designed in partnership with the Tennessee Valley Authority (TVA) and engineering firm AECOM. Infinity Two is built on a peer-reviewed physics basis published in the Journal of Plasma Physics, the first unified design basis ever established for a stellarator plant. The stellarator geometry runs in continuous steady-state operation without the disruptive instabilities that periodically quench tokamak plasmas, simplifying engineering and improving availability.
A smaller prototype device planned to begin construction in 2026, designed to verify key physics and engineering assumptions for Infinity Two and serve as a training platform for stellarator operations. Infinity One completed its formal initial design review in 2025 and is based on Type One Energy's computational optimization of stellarator coil geometry, which enables a more compact and cost-effective form factor than historical stellarator designs.
1 patent on file, but none with both an extractable figure and an abstract on Google Patents yet.
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