The Dow Jones Industrial Average (^DJI 0.39%) has had a great year so far in 2013, returning 19.1% to investors. What's a little surprising are the companies that have led the way for the Dow.

Boeing (BA -0.44%) leads by a mile with a 61% jump, even though its flagship 787 Dreamliner was grounded earlier this year. United Technologies (RTX -0.70%) has shrugged off lower military spending to gain 36.5%, and United Health (UNH 0.35%) has jumped 35% as investors become less worried about the impact of Obamacare on earnings, even seeing it as a strength in some cases. In the video below, Fool contributor Travis Hoium discusses how these stocks have outpaced the Dow as a whole.