The fusion industry is shifting from a scientific challenge to an engineering and supply chain challenge

Overview

The report summarizes UBS's main observations after attending a fusion industry dinner and a major industry conference. The core judgment is that the fusion industry is attempting to move from the stage of scientific breakthroughs toward the stage of commercial power generation, with the key challenges shifting from physics validation to engineering, cost competitiveness, supply chain scaling, and the fuel cycle. Although the technology has not yet been commercially validated, UBS believes stronger government support, rising demand for clean baseload power, electricity demand driven by AI, and cross-industry application potential make fusion an early-stage investment theme worth watching.

Core views

First, public funding and policy support are increasing, as shown by the UK's STEP project, Germany's roughly EUR2bn of public funding by 2029, and milestone programs in the United States, all signaling rising government attention to fusion. Second, power demand—especially demand for clean, abundant, baseload-capable electricity—is an important demand-side driver for the industry, with Google's power purchase agreement with Commonwealth Fusion Systems cited as an example. Third, the supply chain remains a key bottleneck to commercialization, including HTS high-temperature superconducting tape, critical materials, manufacturing capacity, talent, and skilled labor. Fourth, although the deuterium-tritium fuel pathway is seen as a more credible option, tritium supply is scarce and expensive, and the future will need to rely on tritium breeding blankets using liquid lithium and other technologies, which have still not been validated at commercial scale. Fifth, fusion R&D results may spill over into fields such as defense, healthcare, efficient power transmission, and AI data centers.

Analysis framework

Based on remarks and discussions at an industry dinner and a major industry conference, the report distills investment observations on policy funding, demand drivers, supply chain constraints, fuel bottlenecks, potential LCOE, and cross-industry applications, and assesses potential exposure to the fusion theme through supply chain segments accessible to equity investors.

Methodology notes

• Industry thematic researchConference summary and industry observations

  Extract industry trends, bottlenecks, and investment implications from industry conferences and expert discussions.

  This report is not a company valuation model or rating report, but a thematic judgment centered on the commercialization path of the fusion industry, policy support, and supply chain opportunities.

• Cost competitivenessLCOE

  Levelized cost of electricity, used to compare the cost competitiveness of different power sources.

  The report notes that investors focus on fusion LCOE, but LCOE in this early-stage industry is highly assumption-dependent; General Fusion's estimate for the Nth plant is $64-73/MWh.

• Energy technologyHTS

  High-temperature superconducting technology, which can transmit electricity under near-zero-resistance conditions.

  HTS tape and magnets are key parts of the fusion supply chain and may also be used in scenarios such as more efficient power transmission and AI data centers.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Fusion supply chain equities

  Indirectly benefit from fusion commercialization investment and capacity build-out.

  Strengths

  Can cover existing industrial capabilities such as vacuum vessels, piping, refrigeration equipment, and HTS magnets, making them more accessible to equity investors than private fusion companies.

  Weaknesses

  Revenue exposure may be limited, and the timing and scale of fusion orders are uncertain.

  Comparison

  Compared with directly investing in fusion developers, supply chain exposure is more diversified and more tradable, but the thematic purity is lower.

  Risks

  Commercialization delays, technology pathway changes, reduced government funding, and failure of the supply chain to scale.

• HTS high-temperature superconducting technology

  One of the key technologies for fusion magnets and efficient power transmission.

  Strengths

  In addition to fusion, it may also be used in applications such as efficient power transmission and AI data centers.

  Weaknesses

  Current capacity is mainly concentrated in Japan and China, and a secure and cost-competitive supply chain still needs to be built.

  Comparison

  Compared with traditional copper-based cables, HTS can reduce resistance and heat generation, but industry maturity and cost remain constraints.

  Risks

  Insufficient material supply, manufacturing yield, pace of cost reduction, and scaling capability.

• Clean baseload power

  If fusion is successfully commercialized, it could become a new source of clean, abundant, and stable electricity.

  Strengths

  Has narratives around energy security, decarbonization, and baseload supply, and may benefit from electricity demand from AI data centers and elsewhere.

  Weaknesses

  The technology has not yet been commercially validated, and cost competitiveness is uncertain.

  Comparison

  Compared with intermittent renewable energy, fusion's potential advantage lies in its baseload characteristics; compared with existing fission, its commercial safety and fuel cycle still require validation.

  Risks

  LCOE above expectations, engineering challenges that cannot be solved, and fuel bottlenecks limiting expansion.

Key data

• UK STEP project fundingApproximately GBP2.5bn over 5 yearsFor the Spherical Tokamak for Energy Production project.
• Germany public LL funding commitmentApproximately EUR2bn by 2029The report lists this as an example of growing public funding.
• General Fusion LCOE estimate$64-73/MWhFor the Nth commercial fusion power plant; the report emphasizes that this estimate depends on early-stage assumptions.
• UBS rating definition coverage mixBuy 54%，Neutral 40%，Sell 6%Coverage distribution as of March 31, 2026 in the disclosure table, and does not represent this report's rating on the fusion theme.

Impact & implications

For investors, directly listed fusion targets are limited because most companies are still private; a more realistic path is to focus on equipment, materials, refrigeration, vacuum, piping, and HTS-related companies that may benefit from expansion in the fusion supply chain. If fusion ultimately achieves cost competitiveness, its value as clean baseload power could be greater than a simple LCOE comparison suggests; but before commercial validation, the opportunity is more about thematic observation and supply chain optionality than the revaluation of mature power-generation assets.

Risks

• Fusion technology has not yet been validated at commercial scale.
• The supply chain for critical materials, HTS tape, and manufacturing capacity still needs to expand.
• Tritium supply is expensive and globally limited, and tritium breeding capability has not yet been commercially validated.
• Shortages of talent and skilled labor may constrain project delivery.
• LCOE estimates are highly assumption-dependent, and cost competitiveness is highly uncertain.
• Government funding and policy support may fluctuate with changes in politics, budgets, or energy policy.
• There is no unified framework for ESG and sustainable investment definitions, and classification of related themes is uncertain.

What to watch

• Progress in government financing and policy initiatives such as the UK's STEP, German public funding, and US milestone programs.
• The competitive landscape among China, Europe, the United States, and Japan in fusion R&D and industrialization.
• Capacity expansion progress in supply chain areas such as HTS tape, HTS magnets, vacuum vessels, refrigeration equipment, and piping.
• Whether power purchase agreements such as Google's with Commonwealth Fusion Systems expand into more commercial demand signals.
• Follow-up LCOE disclosures and assumption changes from companies such as General Fusion.
• Progress in technology validation related to tritium procurement, tritium breeding blankets, and liquid lithium.
• Spillover applications of fusion technology in defense, healthcare, efficient power transmission, and AI data centers.