(Bloomberg / Will Wade and Riley Griffin) — Constellation Energy Corp. agreed to sell power from an Illinois nuclear plant to Meta Platforms Inc. as artificial intelligence sends power demand soaring.

The parent company of Facebook, Instagram and WhatsApp signed a 20-year contract to buy 1,121 megawatts from the Clinton plant starting in mid-2027, when a state subsidy expires, according to a statement Tuesday. Constellation, the biggest US nuclear operator, and Meta didn’t provide financial details.

Under the deal, Constellation will invest in boosting Clinton’s output. The company is also considering plans to build another reactor at Clinton, which already has federal approval for a second unit.

“It’s a logical place for us to talk to Meta, and to others, about potentially building the

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