The top after-market NASDAQ stock market gainers on Tuesday are: NuVasive, Datalink, Coldwater, Ener1 and TASER International. The top after-market NASDAQ stock market losers on Tuesday are Cree, DepoMed, Rubicon Technology, Veeco Instruments and Ares Capital.

Gainers

Spinal-surgery products maker NuVasive, Inc. (NASDAQ:NUVA) shares advanced 5.06 percent to $29.28 in afterhours trading session on Tuesday. The company said Cigna Corp. and Humana Inc. will cover NuVasive’s eXtreme Lateral Interbody Fusion procedure.

Shares of Datalink Corp (NASDAQ:DTLK) advanced 3.92 percent to $6.09 in post market trading session after surging 29.07 percent in the regular session. NASDAQ:DTLK) shares advanced 31.28 percent to $5.96 in pre-market trading session. The company raised its fourth quarter guidance and said it expects GAAP earnings per share in the range of $0.15 per share - $0.18 per share compared to previous target of $0.09 per share - $0.13 per share range.

Coldwater Creek, Inc. (NASDAQ:CWTR) shares advanced 3.81 percent to $3 in afterhours trading session. The stock has a 52 week low of $2.71 and 52 week high of $8.75 and has 92.40M outstanding shares.

Ener1 Inc. (NASDAQ:HEV) shares gained 3.57 percent to $4.35 in aftermarket trading session. Ener1 signed a joint venture with Wanxiang Group to make electric vehicle batteries for sale in China.

TASER International, Inc. (NASDAQ:TASR) shares advanced 3.16 percent to $4.90 in aftermarket trading on the news that it received five significant follow-on orders of TASER X26 electronic control devices and related accessories.

Losers

Cree, Inc. (NASDAQ:CREE) shares plunged 15.48 percent to $53.00 in aftermarket trading session as its second quarter earnings and third-quarter profit forecast fell short of analysts’ estimation.

Cree’s second-quarter profit climbed 47 percent from a year earlier, while on an adjusted basis revenues missed analysts estimates mainly hurt by lower sales to LED component distributors in Asia. The company forecasts third-quarter profit of 38 cents a share against analysts’ expectation of 58 cents a share.

DepoMed, Inc. (NASDAQ:DEPO) shares declined 15.35 percent to $5.57 in post market trading session. The company announced that it will engage in a mediation process with Abbott Products, Inc., regarding Abbott's commercialization obligations related to DM-1796, an investigational, once-daily formulation of gabapentin for the management of post-herpetic neuralgia (PHN).

Rubicon Technology, Inc. (NASDAQ:RBCN) shares declined 6.18 percent to $21.09 in post market trading session. The stock has a 52 week low of $14.50 and 52 week high of $35.90 and has $515.62M market capitalization.

Veeco Instruments Inc. (NASDAQ:VECO) shares declined 4.78 percent to $46.81 in aftermarket trading session.

Ares Capital Corp (NASDAQ:ARCC) shares declined 4.7 percent to $16.29 in post market trading session. The company announced that it plans to make a private offering of $300 million aggregate principal amount of its Convertible Senior Notes due 2016.

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