Fusion Energy Market (2026-2036)

The growth of this market is mainly driven by record private investment in fusion developers, rising electricity demand from AI data centers and the resulting corporate offtake agreements, expanded government funding for national fusion programs, and the growing participation of utilities and public capital markets. However, persistent scientific and engineering uncertainty and the very high capital requirements for first-of-a-kind pilot plants restrain the growth of this market.

Furthermore, the build-out of the fusion supply chain, AI and high-performance computing for fusion design, and the repowering of retired fossil power plant sites are expected to offer growth opportunities for the stakeholders in this market. However, securing tritium supply and qualifying materials for fusion environments remain major challenges impacting the growth of this market. Additionally, the entry of fusion companies into public markets, the shift from research toward commercial siting and offtake, and the diversification of confinement approaches, including the rise of inertial fusion, are prominent trends in this market.

The Fusion Energy Market comprises the development, design, construction, and eventual operation of fusion power systems, together with the components, technologies, and services that support them. Because commercial fusion electricity is not yet generated, the market value in the base year reflects expenditure on fusion technology development, pilot and demonstration plant engineering and construction, components and systems such as high-temperature superconducting magnets, lasers and pulsed-power drivers, plasma heating systems, vacuum and cryogenic systems, plasma-facing materials, blankets and tritium systems, diagnostics, and control software, and engineering, research, and testing services, by both private fusion developers and public fusion programs. Electricity sales are included from the point at which fusion power plants begin supplying the grid. Investment raised by companies is not itself counted as market value; rather, the market reflects the spending that investment and public budgets fund. The market ecosystem extends from national laboratories, international programs such as ITER, and private fusion developers to component and materials suppliers, engineering and construction firms, utilities, corporate offtakers, investors, and regulators.

The market is experiencing rapid growth as fusion shifts from a field defined by government laboratories to one increasingly led by private companies. According to the Fusion Industry Association's 2026 report, fusion companies raised a record USD 4.48 billion in the 12 months to July 2026, 69% more than the previous year, bringing reported funding since the survey began in 2021 to USD 14.24 billion. The survey covered 56 companies, up from 23 in 2021, which together employ more than 16,000 people. Major rounds included Commonwealth Fusion Systems' USD 863 million Series B2 in August 2025, Inertia Enterprises' USD 450 million Series A in February 2026, Helion Energy's USD 465 million round in June 2026, and Proxima Fusion's USD 518 million round in July 2026.

Demand from electricity buyers is emerging well ahead of commercial operation, driven in large part by the power needs of AI data centers. In June 2025, Google signed a power purchase agreement for 200 MW from Commonwealth Fusion Systems' (CFS) first ARC power plant in Chesterfield County, Virginia, described as the largest direct corporate offtake agreement for fusion energy to date, and increased its equity stake in CFS. In September 2025, Eni signed a power purchase agreement worth more than USD 1 billion for output from the same 400 MW plant, which CFS expects to supply the grid in the early 2030s. In July 2025, Helion began initial construction of its Orion plant in Malaga, Washington, with the goal of delivering at least 50 MW to Microsoft. The FIA reported in 2026 that five companies have a power purchase agreement, offtake agreement, or similar commercial commitment, and six have siting agreements.

Governments are expanding public fusion programs alongside private activity. The U.K. is making a record investment of more than GBP 2.5 billion over the five financial years from 2025-26 to 2029-30, including GBP 1.3 billion for the next phase of STEP, its prototype fusion plant at the former West Burton A coal power station site in Nottinghamshire, GBP 740 million for research infrastructure in magnetic and inertial confinement fusion, GBP 180 million for the LIBRTI fusion fuel technology facility, and GBP 50 million to train more than 2,000 people in fusion-related disciplines. The international ITER project in France remains the largest single public fusion investment; under its 2024 baseline, research operations are scheduled to begin in 2034 and deuterium-tritium operations in 2039, and the revised plan was reported to add around EUR 5 billion in costs.

The path to commercial fusion remains long, capital-intensive, and uncertain. In its 2025 survey, the FIA reported that companies estimated they would need a further USD 77 billion in total to bring their first pilot plants online, with a median of USD 700 million per company, and 83% of respondents cited investment as a major challenge. At the same time, 84% of respondents expected fusion electricity to reach the grid before the end of the 2030s. The market forecast therefore reflects rising development, supply chain, and construction spending through the forecast period, with electricity sales beginning to contribute only in the early 2030s as the first plants come online.