Dow Chemical and DuPont merger (2015-2017)
Two US chemical companies announced an all-stock merger in December 2015, then spent 21 months clearing antitrust reviews in the United States, Europe and China. Each jurisdiction added conditions as it went.
Regulators required divestitures before the deal closed on August 31, 2017.
The combined company split into three separate businesses within two years, as planned from the start.
Shows how a merger that clears its first few regulators can still take a year or more to close, with terms accumulating along the way.
