 Shares of Lockheed Martin Corp. LMT, -0.45 climbed 1.8 in premarket trading Tuesday, after the aerospace and defense systems company reported fourth-quarter profit and sales that rose above Wall Street forecasts, citing a stronger-than-expected finish to the year. Net income fell to 1.91 billion, or 7.40 a share, from 2.05 billion, or 7.47 a share, in the year-ago period. 