Nuclear fusion energy is moving from science fiction toward a potential commercial energy source. Private companies are accelerating energy development with a combination of government funding and venture capital. MIT Energy Initiative analysis (September 12, 2024) suggests fusion could emerge as a leading power source over time, potentially displacing coal, which today supplies roughly a third of global electricity.
"With more than 40 fusion startup companies and more than 100 government-supported fusion projects, there has never been more momentum and enthusiasm for the potential role for fusion in the energy transition," said Robert C. Armstrong, former director of the MIT Energy Initiative. "People are tremendously interested in understanding how fusion power plants could transform electricity generation in the decades ahead."
With billions backing this next clean energy source, the question is shifting from "if" to "when."
What Is Fusion Energy?
Fusion is the process by which the sun and stars produce energy. Fusion power has powered the universe for billions of years, but because the temperature and pressure requirements for achieving fusion are hard to replicate, no one has yet been able to achieve bulk fusion in a practical way to generate electricity. Scientists have theorized about different nuclear fusion approaches since the late 1950s, but without the help of transistors or modern computers, they were unable to prove their concepts.
Current Nuclear Power vs. Fusion Energy
Today's nuclear power plants use fission, which releases energy by splitting large atoms. Fusion energy is released by pushing small atoms together. Both release energy, but they behave very differently.
Why Fusion Energy Matters
The nuclear power plants we have today are fission-based. Fission creates a chain reaction that must be constantly controlled and produces radioactive waste that lasts thousands of years. It is extremely regulated, as fuel is rare and the output is hazardous. As of 2025, 31 countries operate nuclear fission power plants; just five countries — the U.S., France, China, Russia, and South Korea — control 71% of global nuclear capacity, making it geographically concentrated.
The biggest difference between fission and fusion energy is that fusion energy has no chain reaction: if conditions are stopped, the reaction stops. Fusion energy is powered by abundant isotopes found in water, and it produces very little short-lived radioactive material, which makes it an attractive energy source by comparison.
The Investor Dilemma: Where to Deploy Capital
With over 75% of private fusion companies targeting grid delivery by the 2030s, capital is shifting from funding laboratory research to industrial construction with a credible near-term timeline.
As governments back private businesses, investors will have to do their own due diligence to decide the best way to deploy their capital.
Global Investment Opportunities
USA: The U.S. hosts at least 29 fusion startups that have captured over half of global private funding. Supported by federal tax credits and an active innovation environment, it's currently the world's most active private fusion market.
China: China has reportedly mobilized an estimated $6.5 billion toward fusion commercialization since 2023 alone — nearly triple the U.S. Department of Energy's Fusion Energy Sciences Program budget over the same period.
EU: Europe's private sector accounts for only about 5% of global private fusion funding despite its deep public research base.
India: India updated its nuclear energy laws to allow private companies and foreign investors to participate for the first time, as part of its plan to reach 100 GW of nuclear power capacity by 2047, according to NucNet (December 18, 2025).
Once fusion energy becomes viable and commercialized, it could, in our view, help countries reduce their reliance on imported oil and gas.
Global electricity production today remains heavily concentrated in coal, gas, and hydro, with China and the United States together accounting for the largest share of output across all sources, including nuclear, wind, and solar, according to Global Electricity's country-level production rankings.
Strategic Considerations for Investors: Follow the Money
For investors interested in this landscape, the challenge isn't finding a fusion company to back, but knowing which ones to trust. While not all fusion ventures are created equal, there are useful government signals to help identify credible private-sector companies.
The American DOE Milestone-Based Fusion Development Program was first authorized in the Energy Act of 2020 and received its first funding appropriation in fiscal year 2022. The program was announced in September 2022, and, following a rigorous merit-review process, eight selectees were announced in May 2023. Initially, $46 million was obligated for the first 18 months of the program. The program is authorized for a total of $415 million through fiscal year 2027 under the CHIPS and Science Act of 2022. This program serves as a useful signal filter, since companies that receive competitive grants and funding have already established credibility that purely private backing doesn't provide on its own.
"As the world races to make fusion a viable source of energy for industry and consumers, these programs signal that the U.S. intends to be the first to commercialize fusion energy through strong partnerships among our National Laboratories, universities, and the private sector to realize industry-led designs for fusion pilot plants," said David Turk, former U.S. Deputy Secretary of Energy.
Large oil and gas companies are increasingly backing nuclear innovation. Over the past several years, one of the largest American oil and gas producers and its venture investment arm has committed hundreds of millions of dollars to nuclear fusion companies as the technology moves closer to commercial viability.
A major Italian oil and gas player went further, taking equity stakes in fusion developers and signing long-term power purchase agreements valued at more than $1 billion for future clean fusion electricity expected to be produced in Chesterfield County, Virginia. International energy companies taking an interest in nuclear energy is not new — there are reports of a Canadian energy company backing fusion since 2011, when it committed $5 million.
Tech giants are also getting involved, driven by climate commitments, data center energy needs, and an interest in buying in while the price is low. In 2023, a trillion-dollar technology company signed what was reported to be the world's first power purchase agreement with a fusion startup, committing to receive fusion-generated electricity as early as 2028 to help support the rapidly growing energy demands of artificial intelligence and hyperscale data centers, per the International Energy Agency (April 10, 2025).
A different trillion-dollar technology company has approached fusion on two fronts: as a long-term equity investor in one fusion company since 2015, and more recently as a power buyer, signing a 200-megawatt power purchase agreement in June 2025 for electricity expected to come online in the early 2030s from a Virginia-based reactor.
Conclusion
The fusion energy investment landscape has matured quickly. It is entering an era where capital, policy, and construction are converging around credible commercialization timelines. Accelerated by government funding, private investment, and the need for clean energy, fusion energy has the potential to displace fossil fuels over time. The question for investors has shifted from whether fusion energy will go to market, to who will bring it to market first.
In our view, fusion energy represents a rare opportunity: early-stage exposure to a technology that, if it succeeds commercially, could help redefine global energy markets and economic power for decades to come. That said, fusion has a long history of commercialization timelines slipping, and there is no guarantee any given company or technology path will reach grid-scale delivery on the timelines currently being discussed.
For forward-looking investors, the strategic case is, in our view, fairly clear: follow the government signals, prioritize companies with near-term, verifiable milestones, and weigh position sizing against the real possibility that commercialization takes longer than the current cycle of enthusiasm suggests.