Background: Oil and gasoline company Conoco originally went to market in October 1998, after its previous parent, DuPont, the chemicals giant, decided to spin it off. The IPO raised $4.4 billion. Conoco merged with Phillips Petroleum in 2002. The larger energy corporation is called ConocoPhillips ( COP). Stock performance: Shares of ConocoPhillips are down 29.27% this year. The stock is up 1.42% at $51.54 Monday.