President Donald Trump issued an executive order on Friday officially giving the green light to Nippon Steel Corporation's multi-billion-dollar purchase of U.S. Steel Corporation.

The following is a chronology of major events related to Nippon Steel Corp.'s plan to acquire United States Steel Corp.

President Trump signs executive order allowing U.S. Steel partnership with Japan's Nippon Steel, with an $11 billion investment commitment.

Nippon Steel is expected to complete the acquisition on Wednesday U.S. time, buying all U.S. Steel shares for $14.1 billion.

Shares of U.S. Steel dipped after a Nippon Steel executive told the Japanese Nikkei newspaper that its planned takeover of the company required "a degree of management freedom" to go ahead, even as sources told Reuters a deal with the U.