01 Sep 2017 --- Dow Chemical Co. and DuPont Co. have closed their $130 billion merger, effective Aug. 31, 2017. The so-called merger of equals, finalized after over a year of discussion and regulatory approvals, brings together two chemical industry giants to form a new company named DowDuPont. The combined entity will operating as a holding company under the name “DowDuPont” with three divisions – Agriculture, Materials Science and Specialty Products.