The companies whose shares are moving in pre-market trade Tuesday are: FreightCar America, Zynga Inc, Micron Technology, Akorn, Patriot Coal Corp, Mako Surgical Corp, Fossil Inc, Electronic Arts, Wynn Resorts and United States Steel Corp.

FreightCar America, Inc. (RAIL) stock climbed 16.09 percent to $24.10 in pre-market session. The company swung to first quarter net profit of $0.81 per share compared to net loss of $0.11 per share in the same quarter last year.

Zynga Inc. (ZNGA) stock gained 3.24 percent to $8.61 in pre-market session. The company filed a trademark infringement suit against French game publisher Kobojo in a San Francisco federal court on May 4.

Micron Technology, Inc. (MU) stock advanced 3.08 percent to $6.70 in pre-market session. The stock has a 52-week low of $3.97, a 52-week high of $11.13 and $6.43 billion in market capitalization.

Akorn, Inc. (AKRX) stock gained 2.95 percent to $12.58 in pre-market session. The company reported first quarter net profit of $0.08 per share, up from $0.06 per share in the same quarter last year. The company also affirmed its previously issued fiscal 2012 outlook, with the exception of capital spending which has been updated to include the needs of Akorn India Private Limited.

Patriot Coal Corp. (PCX) stock gained 1.67 percent to $5.47 in pre-market session. The company reported first quarter net loss of $0.82 per share compared to $0.17 per share in the same period last year.

Mako Surgical Corp. (MAKO) stock slumped 27.29 percent to $30.10 in pre-market session. Its first quarter net loss widened to $11.7 million or $0.28 per share from $11 million or $0.27 per share in the same period last year. The company also lowered its sales volume outlook for its RIO orthopaedic systems to 52 to 58 units compared to its prior estimation of 56 to 62 units.

Fossil Inc. (FOSL) stock slumped 18.68 percent to $102.27 in pre-market session after lowering its fiscal 2012 earnings outlook. The company currently expects fiscal 2012 earnings to be in a range of $5.30 to $5.40 per share compared to its prior estimation of $5.40 to $5.50 per share and against analysts' estimation of $5.56 per share.

Electronic Arts, Inc. (EA) stock plunged 3.24 percent to $14.64 in pre-market session as first-quarter earnings guidance fell short of expectations. The company expects first-quarter adjusted net loss to be in a range of $0.45 to $0.40 per share on revenue of $500 million while analysts' expect net loss of $0.33 per share on revenue of $577.91 million.

Wynn Resorts Ltd. (WYNN) shares declined 1.53 percent to $123.27 in pre-market session. The company reported first quarter net first quarter net profit of $146 million or $1.23 per share, down from $174 million or $1.39 per share in the same period a year-earlier and also fell short of Reuters' estimation of $1.41 per share.

United States Steel Corp. (X) stock declined 1.2 percent to $26.35 in pre-market session. The stock has a 52-week low of $18.85, a 52-week high of $47.38 and $3.84 billion in market capitalization.

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