The top after-market NYSE gainers on Tuesday are: Federal Agricultural Mortgage, ExamWorks Group, Capital Trust, Rosetta Stone and Hovnanian Enterprises. The top after-market NYSE losers are: Molycorp, Diana Shipping, Aircastle, AMB Property and F.N.B. Corp.

Gainers:

Federal Agricultural Mortgage Corp. (NYSE:AGM) shares climbed 7.35 percent to $20.02 in aftermarket trading session. Its first quarter net income surged to $18.3 million or $1.72 per share from $1.8 million or $0.17 per share in the same quarter last year.

ExamWorks Group, Inc. (NYSE:EXAM) shares surged 7.22 percent to $24.50 in post market trading session. Its first quarter revenue surged 162 percent to $66.6 million from $25.4 million in the same period last year.

Capital Trust, Inc. (NYSE:CT) shares gained 6.72 percent to $5.24 in post market trading session. The company reported first quarter net income of $254.6 million or $11.35 per share.

Rosetta Stone Inc. (NYSE:RST) shares advanced 2.87 percent to $14.69 in aftermarket trading session. Jefferies reiterated a “hold” rating on shares of RST.

Hovnanian Enterprises Inc. (NYSE:HOV) shares advanced 2.51 percent to $2.86 in post market trading session. The stock has a 52 week low of $2.78 and 52 week high of $7.74 and has $217.52 million market capitalization.

Losers:

Molycorp, Inc. (NYSE:MCP) shares plunged 5.72 percent to $62.67 in aftermarket trading session as its first quarter earnings fell short of expectations. Excluding items, the company reported first quarter net income of $0.8 million or $0.01 per share against analysts’ estimation of $0.10 per share.

Diana Shipping Inc. (NYSE:DSX) shares declined 4.82 percent to $10.86 in post market trading session. The stock has a 52 week low of $10.75 and 52 week high of $14.77 and has $935.12 million market capitalization.

Aircastle Ltd. (NYSE:AYR) shares declined 3.36 percent to $13.24 in aftermarket trading session. The company announced that it was informed by funds managed by affiliates of Fortress Investment Group LLC that such funds are offering 5,000,000 common shares pursuant to Aircastle's shelf registration statement which was previously filed with the Securities and Exchange Commission.

AMB Property Corp. (NYSE:AMB) shares declined 3.33 percent to $35.37 in post market trading session.

F.N.B. Corp. (NYSE:FNB) shares declined 3.07 percent to $11.06 in post market trading session after the company announced that it is commencing a registered public offering of 4.5 million shares of its common stock.

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