Cliffs would purchase all of U.S. Steel for all cash and then sell off the Big River Steel subsidiary to Nucor, sources told CNBC's David Faber. U.S. Steel's headquarters would remain in Pittsburgh under the deal.

U.S. Steel shares rose after CNBC reported that Cleveland-Cliffs is partnering with Nucor for a possible bid to buy U.S. Steel.

Lourenco Goncalves, the CEO of Ohio-based steelmaker Cleveland Cliffs, said in a news conference Monday, Jan. 13, 2025, that he wanted to make a new bid for U.S. Steel, which accepted the buyout offer from Nippon in 2023 after it rejected an offer by Cleveland-Cliffs.