Helion Raises Series G Funding Round to Meet Surging Global Demand for Power

Helion, a Washington-based fusion energy company, led by Dr. David Kirtley(Founder & CEO), Chris Pihl(Co-Founder & CTO), and Dr. George Votroubek(Co-Founder & Principal Scientist), has announced a $465 million Series G investment round, bringing the total invested to date in Helion to $1.5 billion and valuing the company at $15.5 billion post-money. The raise was led by Thrive Capital, with participation from additional new investors, including Alta Park Capital, Anti Fund, BoxGroup, Lux Capital, Peak XV Partners, and Ford Motor Company Executive Chairman Bill Ford, plus existing investors, including Capricorn Technology Impact Funds, Lightspeed Venture Partners, Mithril Capital, Dustin Moskovitz through Good Ventures Foundation, SoftBank Vision Fund 2, and a university endowment fund.

Helion Aims to Bring Fusion Power to Market this Decade.

According to David Kirtley, fusion energy is moving from a long-term scientific ambition toward a practical source of clean, reliable, always-on electricity. He said the new funding will help accelerate Helion’s efforts to commercialize fusion power and support its goal of delivering electricity to customers this decade.

Kirtley noted that the continued backing from both new and existing investors reflects confidence in Helion’s technology, execution strategy, and ability to help establish the commercial fusion energy market over the long term.

Investors Back Helion’s Long-Term Vision.

According to Vince Hankes, Helion represents the type of category-defining company that can create an entirely new energy market. He highlighted the company’s technical ambition, execution speed, and commercial focus as key reasons for the investment.

Thrive Capital believes Helion is well positioned to advance fusion energy from a research challenge into a scalable source of clean, reliable power and is backing the company as it pursues its long-term commercialization goals.

Investors See Fusion as a Key Energy Technology.

According to Ravi Mhatre, abundant and affordable energy will be essential to supporting future innovation and economic growth. He described fusion as a critical technology for meeting rising global energy demand and expressed confidence in Helion’s ability to commercialize fusion power in the near term.

Lightspeed’s participation in the round reflects its continued belief in Helion’s technology, execution, and potential to help bring commercial fusion energy to market.

Fusion as a Foundation for Energy and AI.

According to Brandon Reeves, Helion is among a small group of companies working to redefine what is technologically possible. He noted that as energy availability becomes increasingly important for AI development and industrial competitiveness, fusion has the potential to become a foundational source of power.

Lux Capital views Helion as a leader in the transition from fusion research to commercial deployment, with the potential to play a significant role in shaping America’s future energy and AI infrastructure.

Momentum from Technical and Commercial Milestones.

The Series G follows a series of significant achievements by Helion’s seventh-generation prototype, Polaris. The system became the first privately funded fusion machine to operate using deuterium-tritium fuel and surpassed the company’s previous plasma temperature record, exceeding 150 million°C.

At the same time, Helion is advancing construction of Orion, its first commercial fusion power plant in Malaga, marking continued progress toward bringing fusion-generated electricity to the grid.