East Bay steel plant property is bought for more than $200 million

"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. The just-bought property is in eastern Contra Costa County."

"The Pittsburg mill was formerly a 50-50 venture between Pennsylvania-based U.S. Steel and South Korea-based steel company POSCO. In 2020, U.S. Steel bought out the 50% interest that POSCO-California Corp. had owned in the East Bay factory. The plant produced cold-rolled sheets, galvanized sheets, tinplate and tin-free steel. U.S. Steel indefinitely idled steel production at the UPI plant in Pittsburg in December 2023, according to a post on the company's website."

U.S. Steel Property Holdings purchased the former USS-Posco Pittsburg plant site for $275 million through a quitclaim deed, taking ownership of 11 parcels in eastern Contra Costa County. The site includes addresses on Loveridge Road, East Third Street, Columbia Street and Antioch-Pittsburg Highway. The Pittsburg mill had been a 50-50 venture between U.S. Steel and POSCO until U.S. Steel acquired POSCO’s share in 2020. The plant produced cold-rolled, galvanized, tinplate and tin-free steel and was indefinitely idled in December 2023. Nippon Steel completed acquisition of U.S. Steel in June 2025 and pledged major U.S. investments and upgrades at other plants.

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