06:36 AM EDT, 06/16/2025 (MT Newswires) -- United States Steel ( X ) shares were up 5.2% in recent premarket activity Monday after US President Donald Trump approved the company's proposed partnership with Nippon Steel.

The companies said late Friday they have signed a national security agreement with the US government providing for roughly $11 billion in new investments, to be made by 2028.

The agreement includes commitments related to governance, domestic production, and "trade matters," US Steel and Nippon said.

The companies said they expect the partnership to be finalized "promptly."