Nelson Peltz amasses big stake in DuPont

Nelson Peltz's Trian Fund Management has bought up a big stake in DuPont.

But when asked for details about the stake in DuPont at CNBC's Delivering Alpha conference, he declined to speak more about it.

David Grogan | CNBC

"You asked me in the green room about 10 minutes ago: 'If you say DuPont, what comes to mind." Remember what I told you? I said: 'Paint.' That's all you're going to get today," Peltz said.

Shares of DuPont closed up 5.3 percent at $57.25.