Amazon

Amazon's AI infrastructure footprint is the largest by absolute project count — 11 tracked projects spanning Susquehanna PA (co-located with 2.5GW nuclear), Project Rainier in Indiana (Anthropic training campus), and the $1B+ X-energy commitment for 5GW of SMR capacity by 2039. AWS is the workhorse; Anthropic is the highest-value tenant.

The Talen Energy Susquehanna deal in PA was a watershed: Amazon co-locating directly with a nuclear plant, bypassing the grid entirely. Expect more "co-located behind-the-meter" deals — the regulatory pushback is real (FERC has been reviewing this structure) but the demand is overwhelming.