A year and a half after a deal between Nippon Steel and U.S. Steel was announced, the two companies said they finalized their “historic partnership.”

Japan-based Nippon Steel on Wednesday completed its buyout of U.S. Steel, changing its name to Nippon Steel North America, as the former U.S. industrial giant ended trading on Wall Street under its former brand name.

HARRISBURG, Pa. (AP) — Nippon Steel and U.S. Steel said Wednesday they have finalized their “historic partnership,” a deal that gives the U.S. government a say in some matters and comes a year-and-a-half after the Japanese company first proposed its nearly $15 billion buyout of the iconic American steelmaker.