A global AI buildout is driving an estimated $650 billion in Big Tech AI spending in 2026, with four Toronto Stock Exchange-listed companies positioned to benefit from the resulting demand for power, supply chain, hardware and infrastructure. The International Energy Agency projects global data center electricity consumption will more than double to roughly 945 terawatt-hours by 2030, pushing tech giants toward nuclear energy. Cameco (TSX: CCO), a uranium provider, posted first-quarter 2026 net earnings of C$131 million and adjusted net earnings of C$203 million, with adjusted EBITDA reaching C$509 million; its uranium segment generated C$423 million in adjusted EBITDA, a 48% jump from the same quarter in 2025. Utilities locked in 116 million pounds of uranium under long-term contracts in 2025. Key risks for Cameco include shares trading at 93.5 times trailing earnings.