OpenAI is in advanced talks to lease SB Energy's 10 GW data center campus in Piketon, Ohio, with Nvidia in discussions to guarantee roughly $250 billion of the financing behind it, the Wall Street Journal reported. Nvidia is separately discussing financing the accelerators for the site, which could run to another $350 billion. Terms haven't been settled, and the arrangement could still collapse. Nvidia's involvement would let SB Energy raise debt against Nvidia's balance sheet instead of its tenant's, as OpenAI has no investment-grade credit rating. Nvidia has already put $30 billion into OpenAI, which has raised its projected compute spending to around $750 billion through 2030. Commerce Secretary Howard Lutnick controls allocation of the site's power, and Anthropic, Microsoft, and Google have spoken to him about it. Nvidia's Q1 FY2027 10-Q caps maximum gross exposure across all of its partner facility lease guarantees at $3.5 billion, with $712 million in escrow. A $250 billion guarantee would be roughly 71 times that disclosed guarantee book. SB Energy broke ground at the former Portsmouth Gaseous Diffusion Plant on March 20 alongside Energy Secretary Chris Wright, Lutnick, and SoftBank chairman Masayoshi Son.