The activist investor previously said in a filing it intended to put $500 million into the northwest Indiana site.

The United Steelworkers said an activist investor wants to sell United States Steel Corp.’s state-of-the-art mills to fund ...

The United Steelworkers said an activist investor wants to sell United States Steel Corp.’s state-of-the-art mills to fund sweeping upgrades of union-run facilities that date back to the days of ...