Every fusion startup that has raised over $100M

Fusion startups have collectively raised $7.1 billion to date, with a significant portion of this funding going to a handful of companies, including Commonwealth Fusion Systems, Helion, and TAE Technologies. Commonwealth Fusion Systems has raised the most, with approximately $3.94 billion in committed capital, including a recent $1 billion round that closed in July. The company is working on building its first-of-a-kind power plant, Sparc, which is intended to produce power at commercially relevant levels, with the goal of reaching scientific breakeven by 2027. Sparc's reactor is a tokamak design, utilizing high-temperature superconducting tape to generate a powerful magnetic field that will contain and compress the superheated plasma. The company's progress is notable, given the challenging nature of mastering fusion technology, which promises to harness the nuclear reaction that powers the sun to generate nearly limitless energy on Earth.

The recent advances in fusion technology have been driven by three key factors: more powerful computer chips, more sophisticated AI, and powerful high-temperature superconducting magnets. These advances have enabled the development of more sophisticated reactor designs, better simulations, and more complex control schemes. The U.S. Department of Energy lab's announcement in 2022 that it had produced a controlled fusion reaction that produced more power than the lasers had imparted to the fuel pellet marked a significant milestone, crossing what's known as scientific breakeven. This breakthrough has helped to drive investment in the private fusion industry, with companies like Helion and TAE Technologies also making significant progress. Helion, for example, has the most aggressive timeline, planning to produce electricity from its reactor in 2028, with Microsoft as its first customer. TAE Technologies, on the other hand, uses a field-reversed configuration with a twist, bombarding the plasma with particle beams to improve stability and allow for more time for fusion to occur.

The implications of these developments are significant, with the potential to upend trillion-dollar markets if commercially viable fusion power plants can be completed. Companies like Commonwealth Fusion Systems, Helion, and TAE Technologies are backed by a range of investors, including Breakthrough Energy Ventures, The Engine, Bill Gates, Sam Altman, SoftBank Vision Fund 2, and Reid Hoffman, among others. The fact that Google has agreed to buy half of the output from Commonwealth Fusion Systems' commercial power plant, Arc, which is expected to produce 400 megawatts of electricity, highlights the growing interest in fusion technology from major companies. As these startups continue to push the boundaries of what is possible with fusion, it will be important to watch how their progress unfolds, and how it may impact the wider energy landscape. With the potential for nearly limitless energy, the stakes are high, and the potential rewards are significant, making the development of fusion technology a story worth watching closely in the years to come.

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