The top pre-market NASDAQ Stock Market gainers are: GT Solar International, STEC, DryShips, ASML Holding, Sina Corp, Natural Alternatives International, Apple and Boingo Wireless. The top pre-market NASDAQ Stock Market losers are: SIGA Technologies and SunPower.

Gainers:

GT Solar International, Inc. (NASDAQ:SOLR) shares surged 6.64 percent to $13.00 in pre-marekt trading session after the company raised its guidance for the first quarter of 2012. The company now expects first quarter earnings will be about $0.30 per share on revenue of $225 million, up sharply from its previous estimate range of $0.08 to $0.11 per share on revenue of $140 million to $150 million, while analysts’ expect earnings of $0.15 per share on revenue of $160.85 million.

STEC, Inc. (NASDAQ:STEC) shares advanced 3.54 percent to $17.25 in pre-market trading session. The stock has a 52 week low of $10.95 and 52 week high of $25.44 and has $856.79 million market capitalization.

DryShips Inc. (NASDAQ:DRYS) shares gained 3.72 percent to $3.90 in pre-market trading session. The company stock was upgraded to “outperform” rating from “market performs” rating at Wells Fargo.

ASML Holding N.V. (NASDAQ:ASML) shares gained 3.37 percent to $37.74 in pre-market trading session.

Sina Corp. (NASDAQ:SINA) shares gained 2.49 percent to $88.39 in pre-market trading session. The company stock was upgraded to “buy” rating from “hold” rating at Gradient.

Natural Alternatives International, Inc. (NASDAQ:NAII) shares advanced 2.5 percent to $3.28 in pre-market trading session.

Apple Inc. (NASDAQ:AAPL) shares advanced 0.84 percent to $329.15 in pre-market trading session. The company agreed to pay an undisclosed sum and royalties to Nokia, settling all patent litigation between the two companies.

Boingo Wireless, Inc. (NASDAQ:WIFI) shares advanced 2.47 percent to $10.36 in pre-market trading session.

Losers:

SIGA Technologies Inc. (NASDAQ:SIGA) shares plunged 8.84 percent to $11.03 in pre-market trading session on news that Congress plans to investigate the company's recent receipt of a government contract worth up to $2.8 billion.

SunPower Corp. (NASDAQ:SPWRA) shares declined 2.21 percent to $20.80 in pre-market trading session.

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