Helion

What it does

Helion is developing fusion energy technology to generate clean, safe, scalable electricity. The company uses magnets to accelerate particles toward each other, causing them to merge and release energy, which is then converted into usable electricity. Helion is building two key machines: Polaris, which demonstrates electricity from fusion, and Orion, which aims to be the world's first fusion power plant. The company has raised $465 million in a Series G round led by Thrive Capital at a $15.5 billion post-money valuation, and it has awarded $4 million to 20 research institutions through its HERCULES program to accelerate scaled fusion deployment.

Who it is for

Helion's technology is designed for utility companies, grid operators, and large-scale energy consumers seeking a continuous, carbon-free power source. The company targets the global energy market, aiming to replace fossil fuels and complement renewables with always-on fusion power. Its investors include Thrive Capital and other institutional backers focused on clean energy.

Why it matters

Fusion energy offers unlimited fuel (deuterium from water, helium-3 produced in fusion), inherent safety (no runaway chain reactions, no long-lived waste), and 24/7 operation regardless of weather. Helion's progress—Polaris has demonstrated measurable deuterium-tritium fusion—positions it as a leading contender to commercialize fusion this decade. If successful, it could provide abundant, carbon-free baseload power, addressing climate change and energy security.

Launch signal

Helion announced a $465 million Series G funding round on June 4, 2026, led by Thrive Capital at a $15.5 billion valuation. The company also reported a milestone in February 2026: Polaris became the first privately developed fusion machine to demonstrate measurable deuterium-tritium fusion. These signals indicate strong investor confidence and technical progress toward commercial deployment.

Brand and naming

The name 'Helion' is derived from 'helium' and 'helio-' (sun), directly linking to fusion energy. The brand is memorable and evocative, though the .com domain (helionenergy.com) is used rather than helion.com. The tagline 'Building the world's first fusion power plant' clearly positions the company as a leader in commercial fusion. The website emphasizes clean, safe, scalable power with a technical yet accessible tone.