Steel workers at U.S. Steel Granite City Works in Granite City, Illinois, U.S., May 24, 2018.
Despite the surge, shares of U.S. Steel were trading well below the offer price at $27.92, indicating some investors believe a deal may not happen at that price.
Cleveland-Cliffs shares were down 6.1%.
A combination between the two firms will create the largest steel producer in North America and the 10th largest steel producer in the world and will be a dominant supplier to the transportation sector, KeyBanc Capital Markets analyst Philip Gibbs said in a note.
U.S. Steel said it has invited Cleveland-Cliffs to be a part of the review process.
Persons:
Lawrence Bryant, steelmaker, Philip Gibbs, Gibbs, Priyamvada, Reshma George, Arpan Daniel Varghese, Saumyadeb
Organizations:
U.S . Steel, U.S . Steel Granite City, REUTERS, Steel, KeyBanc Capital, Midwest, AK Steel, U.S, . Steel, Thomson
Locations:
U.S . Steel Granite, Granite City , Illinois, U.S, Cleveland, North America, China, ArcelorMittal, Bengaluru