Tempur-Pedic International Inc, ACADIA Pharmaceuticals Inc, STMicroelectronics N.V, Silicon Graphics International, Select Comfort Corp, Molycorp Inc, Nokia Corporation are among the companies whose shares are moving in the pre-market trading Friday.

Tempur-Pedic International Inc (NYSE: TPX) stock climbed 17.11 percent to $44.91 in pre-market trading.  The stock has a 52-week low of $20.70, a 52-week high of $87.43 and $2.29 billion in market capitalization.

ACADIA Pharmaceuticals Inc (NYSE: ACAD) stock advanced 5.93 percent to $6.25 in pre-market trading. The stock has a 52-week low of $1.29, a 52-week high of $6.53 and $351.97 million in market capitalization.

STMicroelectronics N.V. (NYSE: STM) stock advanced 4.75 percent to $8.60 in pre-market trading. The stock has a 52-week low of $4.51, a 52-week high of $8.60 and $7.29 billion in market capitalization.

Silicon Graphics International Corp. (NASDAQ: SGI) stock gained 3.42 percent to $12.39 in pre-market trading. Sterne Agee upgraded shares of Silicon Graphics International Corporation from a neutral rating to a buy rating in a research note issued to investors Friday. The firm currently has $19.00 target price on the stock.

Select Comfort Corp. (NASDAQ: SCSS) stock declined 15.50 percent to $23.83 in pre-market trading. The stock plunged after it declared fourth quarter results that missed Wall Street expectations and issued worse-than-expected full-year guidance.

Molycorp Inc. (NYSE: MCP) stock declined 2.40 percent to $6.90 in pre-market trading. The company announced Sunday the pricing of its  public offering of 37,500,000 shares of its common stock  at a price per share of $6.00 (the "Primary Shares Offering") and $150 million aggregate principal amount of its 5.50 percent Convertible Senior Notes due 2018 in separate registered public offerings.

Nokia Corporation (NYSE: NOK) stock was down by 1.64 percent to $4.19 in pre-market trading. The stock has a 52-week low of $1.63, a 52-week high of $5.87 and $15.95 billion in market capitalization.

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