Investors Bet Big on Helion Energy To Bring Fusion Power To The Grid

Fusion energy is not something you hear about every day, yet it has the ability to shape how the world is powered. Helion Energy, a Washington-based fusion firm, is working to make this long-discussed concept a reality. While fusion has long been regarded as an ambitious, seemingly unachievable objective, Helion has successfully balanced advances and hurdles, earning the trust of high-profile investors along the way. The business recently raised $425 million in its Series F fundraising round.

One of the biggest hurdles for Helion lies in securing the specialized components needed to build its reactors. Its latest prototype, Polaris, houses approximately 50,000 pulse-power semiconductors—critical elements that have proven difficult to source, similar to supply chain issues faced in AI and semiconductor industries. To mitigate this, Helion is shifting more of its manufacturing in-house, aiming to produce capacitors and other key parts more quickly to accelerate development.

Despite these challenges, CEO David Kirtley remains confident that Helion will meet its 2028 deadline to supply electricity to Microsoft. The company has already begun work on site planning and permitting for the facility, a crucial step toward integrating fusion energy into the grid.

A Different Approach to Fusion

Unlike many competitors focused on traditional magnetic confinement or laser-based inertial fusion, Helion is betting on a field-reversed configuration (FRC) reactor. This approach uses powerful magnets to guide and compress plasma, creating conditions necessary for fusion. Rather than relying on steam turbines to convert heat into electricity, Helion’s design aims to extract power directly from the reaction, making the process more efficient and potentially more scalable.