Union Pacific Corporation (NYSE:UNP) shares are trading higher Thursday after the company reported better-than-expected first-quarter results before the bell. The Details: Union Pacific reported quarterly earnings of $2.69 per share which beat the analyst consensus estimate of $2.52 by 6.75%. The company reported quarterly sales of $6 billion, beating the analyst consensus estimate of $5.98 billion by 0.26%.  The company said its operating revenue of $6 billion was ...