Over the past few years, fusion power has transitioned from being a punchline—always a decade away!—to a promising technology attracting significant investor interest. While currently difficult and costly to implement, fusion has the potential to leverage the nuclear reactions of the sun to deliver nearly limitless energy on Earth. Should startups succeed in constructing commercially viable fusion power plants, they could disrupt trillion-dollar markets.
The fusion industry’s upward trajectory is fueled by three innovations: advanced computer chips, sophisticated AI, and high-temperature superconducting magnets, all contributing to better reactor designs, simulations, and control schemes. A notable milestone was achieved at the end of 2022 when a U.S. Department of Energy lab managed a controlled fusion reaction that produced more energy than the lasers used in the process. Though commercial breakeven is still distant, this development validated the foundational science of fusion.
The private fusion sector has capitalized on this momentum, rapidly progressing. Commonwealth Fusion Systems (CFS) has led the charge, garnering roughly one-third of all private investment in fusion companies. Its recent funding round boosted its total to nearly $3 billion, with plans for a commercially viable reactor, Sparc, expected to be operational by late 2026 or early 2027. CFS intends to construct Arc, a commercial power plant designed to generate 400 megawatts of electricity, near Richmond, Virginia, with Google set to purchase half its output.
CFS is supported by a consortium of investors, including Breakthrough Energy Ventures and Bill Gates. TAE Technologies, originally Tri Alpha Energy, plans to merge with Trump’s social media firm, valuing the new entity at $6 billion. TAE received $150 million in June from seasoned investors like Google and Chevron.
Helion aims to produce electricity by 2028, with Microsoft as its first customer. Its distinctive reactor approach involves a field-reversed configuration that harvests electricity directly from the plasma’s magnetic fields. Helion has raised over $1 billion with backers such as Sam Altman and Reid Hoffman.
Pacific Fusion, with a $900 million Series A, plans to utilize inertial confinement for fusion. The startup is led by Eric Lander and Will Regan, with funding distributed upon achieving specific milestones, common in biotech. Shine Technologies adopts a cautious path, selling neutrons and medical isotopes while innovating in radioactive waste recycling.
General Fusion, from Richmond, British Columbia, experienced financial strain but secured interim funding to continue developing its magnetized target fusion approach. Inertia Enterprises, led by notable scientists, acquired $450 million in Series A funding, focusing on lasers for fusion fuel pellets. Tokamak Energy adapts traditional tokamak designs, raising $336 million to further reactor development and its magnet business.
Zap Energy employs electric currents to confine plasma, securing $327 million from investors like Bill Gates. Type One Energy is developing a stellarator fusion reactor on a former coal power site, with plans to sell core technology to utilities. Proxima Fusion received over €185 million, focusing on stellarators’ promising scientific potential.
Kyoto Fusioneering is focused on fusion balance of plant components, attracting $191 million from investors. Marvel Fusion, employing an inertial confinement approach, is building a demonstrator facility expected by 2027. First Light Fusion, utilizing a unique inertial confinement method, pivoted to offering its technologies for external power plant construction.
Xcimer is taking a straightforward approach by redesigning NIF’s net-positive experiment’s laser system and has raised $100 million to develop a 10-megajoule laser system. This story was initially published in September 2024 and will be regularly updated.