These days in corporate America, you're not somebody until an activist investor rattles the cages at your company. In recent times, companies like eBay, Family Dollar and, yes, even Apple have all been the targets of an activist investor in various forms and fashions. However, none of those have the air of being a classic standard bearer of good, old-fashioned American industry like DuPont. The company has been targeted by Nelson Peltz, head of Trian Fund Management, since 2013.