PITTSBURG — A United States Steel Corp. unit has bought the Pittsburg property where a steel mill had operated for decades until it ceased operations about two years ago.
The former USS-Posco plant site in Pittsburg has been bought for $275 million by U.S. Steel Property Holdings, according to documents filed on Dec. 29 with the Contra Costa County Recorder’s Office.
U.S. Steel Property Holdings is a real estate unit of U.S. Steel, which itself is owned by Nippon Steel Corp., a Japan-based steel company that took ownership of the iconic steel company in June 2025.
Nippon Steel paid $14.9 billion to buy U.S. Steel and has pledged to accomplish an array of investments that would ramp up steel production in the United States as well as create American jobs…