General Fusion IPO: Inside the First Public Fusion Stock

Nuclear fusion has long been expected to be the next big thing in energy technology, promising to supply mankind with unlimited carbon-free power while not producing any radioactive waste, contrary to nuclear fission.

However, recreating on Earth the conditions of the core of the Sun, especially the tens of millions of degrees, is a challenging task. Even more so when the goal is not to recreate these conditions for a few seconds in a lab, but in a way that the energy produced exceeds the energy used to ignite and then keep confined the ultra-hot plasma. We previously covered the technical details of why fusion is so difficult to achieve in “Nuclear Fusion – The Ultimate Clean Energy Solution on the Horizon”.

Nevertheless, the idea that nuclear fusion can be made commercially viable is making quick progress, and not just with megaprojects like ITER. Many commercial companies are now aiming to start selling their own nuclear fusion reactor in the next 10 years. Until recently, this has been a domain reserved for accredited investors, as these companies were all privately listed.

This has now changed, with the IPO of General Fusion (GFUZ ) on July 13^th, 2026, beating competitor and Trump-backed TAE Technologies by several months ahead of its own IPO. Following the highly scrutinized and publicized SpaceX IPO (SPCX ), this makes for another high-tech stock with very promising technology for a science-fiction-like future.

General Fusion Overview

General is one of the startups leading the charge in making fusion a private sector venture, instead of a publicly funded physics project. The company was started as long ago as 2002 to develop Magnetized Target Fusion (MTF) technology.

MTF is expected by the company to be a shorter path to energy-positive fusion and to be a lot less costly. General Fusion was the first in the world to build and commission a compact toroid plasma injector at a power plant scale in 2010 and has reached many more milestones since.

Overall, General Fusion has spent 2 decades building step by step each of the core technologies of its final design, testing each along the way, and successfully validating the idea, at least so far.

With only 133 employees, General Fusion is still very much an R&D and tech-focused startup, with 200,000+ plasma experiments conducted and holding 210 patents. The company aims for Commercial system and components validation by the end of the 2020s, and to begin selling commercial plants in the mid-2030s.

Source: General Fusion

In theory, the technological choice of General Fusion should give it an advantage, as it offers a good compromise in the technical requirements for maintaining conditions for fusion, with both moderate energy confinement time and plasma density, both metrics where the main competing technologies (inertial confinement & magnetic confinement) have one going toward the extreme, making it more challenging to achieve reliably and cheaply.

This allows General Fusion to avoid superconducting magnets and high-powered lasers, as well as to use existing materials for durable machines and cost-effective energy production.

Source: General Fusion

The way it works is to form a cavity inside the fusion vessel. Then, magnetized plasma is injected into the cavity and compressed with liquid metal. The pressure and heat it generates ignite fusion, producing more heat, which can be recovered to generate energy. The same process is repeated several times every second, not unlike the pistons in a combustion engine, except that the fuel is hydrogen and the combustion process is replaced by nuclear fusion.

Source: General Fusion

This design is also not dependent on an external supply of tritium, often a costly material in low supply with other nuclear fusion concepts, as tritium is natively produced by hitting lithium atoms with the neutrons generated by the fusion.

Overall, it can leverage known technologies, such as steam turbines, for the capture of energy, making it similar to nuclear fission plants in that regard.

A Growing Market

The company is counting on electricity demand, especially carbon-free electricity that is also as dependable as baseload nuclear fission and fossil fuel power plants, to be in high demand in the upcoming years. Electrification of heating, transportation, industries, and the booming demand from data centers are all expected to boost US and global electricity demand.

Source: General Fusion

This is also why the Department of Energy is actively pushing for quicker commercialization of nuclear fusion.

General Fusion is aiming for a levelized cost of energy (“LCOE”) as low as $64-$73/ MWh, making it cheaper than all current nuclear power plants as well as future SMR,  and on par with the cheapest natural gas and renewable + storage facilities.

Thanks to its early start and the steady progress it made on the path to commercialization, General Fusion can claim many partners with top energy companies like the Tennessee Valley Authority (TVC ), BC Hydro, Duke Energy (DUK ), and Southern Company (SO ) (SOT.DE ).

Post-IPO Situation

Right after the merger with a SPAC to perform the IPO, the stock went up in value by 21% in one day and hit a high of $14.85/share. It has since then cooled down from the initial opening level of $12.80, currently trading at $9 per share.

In total, General Fusion raised $108 million from private investors during the IPO. Altogether, the company says it holds about $150 million in cash after the IPO. Over the years, it has raised over $600 million from private investors.

This cash infusion should alleviate any short-term risk of running out of money, a very real concern for startups at this stage.

This raises the question for retail investors now able to access the company: should they buy the stock?

A Long-Term Bet

Pros To Invest In General Fusion

For sure, any company looking at eventually producing a saleable product not sooner than the mid-2030s is a bet on the future.

The argument for General Fusion is that it is one of the most advanced nuclear fusion private companies, alongside a select few like Helion, Proxima Fusion, Commonwealth Fusion Systems, and TAE.

It is also, for now, the sole nuclear fusion company available to retail investors, a sector that has gathered a lot of attention from science-driven investors looking for the new Tesla (TSLA ) or SpaceX.

With a market capitalization below $1B, this makes General Fusion a perfect “long-shot” investment, with the IPO early enough to hope to lock in 10x, 100x, or even more gain if all goes well. In that respect, this can be a lot better than investing in companies already with a trillion-dollar capitalization, as a lot of the possible gains have already occurred.

Cons To Invest In General Fusion

However, it can be very hard for non-physicists to determine which strategy to achieve fusion is the right technology. For a long time, General Fusion felt like a safe middle ground, not looking to achieve anything too outlandish and exotic.

But competitors like Helion are claiming to already be building their own manufacturing facilities and claim to be planning for the delivery of functioning power plants to Microsoft (MSFT ) and OpenAI by 2028 and 2030, respectively.

So there is also a risk that General Fusion might be the first, but also just one among many fusion companies, as the technology matures and becomes commercially viable.

It is also hard to understand the energy landscape that far in the future. War with Iran or Russia, improving renewables, collapsing costs for utility- scale batteries, or even eventual orbital power solar satellites, could all affect the electricity market and the profitability of future nuclear fusion power plants in a 10+ year timeframe.

Similarly, actual demand from EVs and AI data centers is expected to grow, but by exactly how much and when is harder to model.

Conclusion About General Fusion IPO

Investing right after an IPO is always a risky proposition, as it is hard to determine what value the market will attribute to a company right after it becomes public. Often, the initial enthusiasm can fade, and the price enters a decline that can last anywhere from a few days to years.

This is also a period of complex trading patterns, with insiders potentially looking to sell some of the shares they acquired at a much lower price, irrespective of the current stock price fluctuation.

Still, General Fusion is a technically impressive company, having steadily hit its technical milestones one after the other for two decades, long before many people started to believe that private fusion companies could be commercially viable.

As the first fusion IPO, it also benefits from increased exposure and will likely be incorporated in many portfolios or even ETFs looking for exposure to the sector.

Ultimately, hitting the promised deadline and technical milestone in the coming years will be the determining factor in the success or failure of an investment in General Fusion. And anyone buying the stock should expect volatility and take a long-term view of the company’s promise of becoming the one, or one of the companies, able to deliver to mankind unlimited carbon-free baseload power, a multi-trillion dollar market that can certainly have more than one player if they achieve that lofty goal.

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