Eni Leads Major Energy Firms in Billion-Dollar Push to Commercialize Fusion

Global private investment in nuclear fusion reached a record $4.48 billion in 2025, marking a 69 percent increase from the previous year. Major energy corporations are now moving beyond passive startup backing to actively plan commercial deployment.

Italian energy giant Eni S.p.A. intends to deploy a commercial fusion power plant in Europe by the early 2040s or sooner. The company has committed over $1 billion to purchase electricity from Commonwealth Fusion Systems’ first commercial United States facility.

This shift reflects a broader industrial maturation of the sector. Francesca Ferrazza, Eni’s head of magnetic fusion initiatives, stated that competition is growing as technology and expectations have changed significantly over the past five to six years, transforming fusion from pure research into a viable industry.

Commonwealth Fusion Systems recently secured an additional $1 billion in funding, bringing its total capital to $4 billion. The startup targets the early 2030s for its 400-megawatt ARC facility in Virginia, which has already applied for grid interconnection with PJM and secured a 200-megawatt purchase agreement with Google.

Securing the Fusion Fuel Cycle

Beyond power generation, Eni is leveraging its hydrocarbon and hydrogen processing expertise to build a supply chain for fusion reactor fuel. The company formed a joint venture with the UK Atomic Energy Authority to globally develop and sell services that recover, purify, and recycle deuterium and tritium.

This fuel cycle is critical because tritium is radioactive, possesses a 12.3-year half-life, and exists naturally only in trace amounts. A single 1-gigawatt deuterium-tritium fusion plant could consume approximately 55 kilograms of tritium annually, far exceeding natural supply limits.

To address this bottleneck, commercial reactors must continuously recover and recycle unused fuel through closed-loop systems. Eni is currently developing a large-scale tritium fuel-cycle testing facility at the UKAEA Culham Campus in Oxfordshire, with completion scheduled for 2028.

Broad Industry Participation

Eni is not alone in hedging against future energy paradigms. Equinor, Chevron, Shell, and Cenovus have all established significant positions across competing fusion technologies ahead of commercial electricity production.

Chevron Technology Ventures has backed multiple approaches, including a 2025 participation in TAE Technologies’ $150 million funding round, which lifted the startup’s total equity above $1.3 billion. Shell Ventures similarly joined a $130 million Series D for Zap Energy in 2024 to support its sheared-flow stabilization technology.

Meanwhile, Cenovus made an early $4 million investment in General Fusion in 2011. That Canadian company recently agreed to merge with a special-purpose acquisition company in a transaction valuing it at approximately $1 billion, targeting a Nasdaq listing under the ticker GFUZ and a mid-2030s commercial plant launch.