"DuPont board has not held management accountable for repeatedly missing promised revenue and earnings targets," Trian said in a statement. Read More Activist to publicpensions: Thank you! DuPont responded in a statement that its board would review Trian's director nominees and "make a recommendation that is in the best interest of all shareholders." In defense, DuPont pointed to its market-beating stock returns under its leadership team since the end of 2008 and said its highly qualified directors are revamping the company. It has also noted ongoing cost cuts.