TheTechno Optimist.

Thea Energy—Thea Energy receives $20 million federal grant from ARPA-E for magnet manufacturingThea Energy—DOE certifies Thea Energy's Helios pilot plant preconceptual designThea Energy—Thea Energy closes $100 million Series B funding round

Thea Energy

Planar stellarator, software-controlled magnets, commercial fusion

USprivateest. 2022thea.energy (opens thea.energy)Checked 10 Oct

The brief

Analyst view
  • Raised $130M total ($20M Series A in early 2024, $100M Series B in May 2026); headquarters in Kearny, New Jersey.
  • Eos neutron source targets 2030 operations, selling tritium and medical isotopes before Helios power plant.
  • Planar HTS coils with dynamic software control simplify magnet design. DOE certified Helios pilot plant design in January 2026.

Technical approach

As reported
Magnet design

Planar HTS coils

High-temperature superconductor coils in planar arrays replace 3D magnet systems. Software controls field geometry in real time.

Manufacturing

Mass-producible fabrication

Planar coils are wrapped with a machine called Zeus. Approach reduces complexity versus hand-wound or 3D-printed magnets.

Operations

Isotope revenue before power

Eos operates as neutron source and isotope producer before Helios. Revenue from tritium and medical isotopes funds long-term R&D.

Primer