The top after-market NASDAQ gainers Wednesday were BG Medicine, Kayak Software Corporation, Landec Corporation, Solazyme Inc. and iPass Inc. while the top after-market NASDAQ losers were Electro Scientific Industries Inc, Mellanox Technologies, Rambus Inc. and TGC Industries Inc.

Gainers

BG Medicine Inc. (BGMD) shares climbed 16.38 percent to $2.70 in post-market trading. The company announced Wednesday that the first automated version of the BGM Galectin-3 blood test has obtained a CE Mark.

Kayak Software Corporation (KYAK) shares gained 8.72 percent to $43.50 in post-market trading. The stock was upgraded from a neutral rating to an outperform rating by Zacks in a research note released Wednesday.

Landec Corporation (LNDC) shares rose 6.92 percent to $10.50 in post-market trading. The company announced that it has restated financial statements for the first quarter of fiscal year 2013 to reflect a $2.9 million increase in the previously reported statement pertaining to fair market value of Windset Holdings 2010 Ltd.

Solazyme Inc. (SZYM) shares advanced 6.49 percent to $8.86 in post-market trading. The stocks of the renewable oil production company rose after Congress approved legislation extending tax credit to the industry.

iPass Inc. (IPAS) shares went up by 6.19 percent to $2.06 in post-market trading. The stock has a 52-week low of $1.33, a 52-week high of $2.80 and $118.86 million in market capitalization.

Losers

Electro Scientific Industries Inc. (ESIO) shares declined 17.24 percent to $8.45 in post-market trading. The company stocks have a 52-week trading range of $9.28-$17.00 and $300.12 million in market capitalization.

Mellanox Technologies Ltd. (MLNX) shares slumped 13.87 percent to $52.70 in post-market trading. The company shares were down after it lowered its fourth quarter revenue forecast to the range of $119 million to $121 million, from the previous guidance of $145 million to $150 million.

Rambus Inc. (RMBS) shares dropped 6.49 percent to $4.90 in post-market trading. The company was barred by a judge from using 12 of its patents to demand royalties from Micron Technology Inc. because it improperly destroyed documents tied to intellectual-property litigation, Bloomberg reported. The stocks gained 7.60 percent in regular trade.

TGC Industries Inc. (TGE) shares fell 3.49 percent to $8.30 in post-market trading. The stock has a 52-week low of $5.26, a 52-week high of $11.85 and $177.61 million in market capitalization.

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