Georgia Gulf -Westlake Chemical withrew its $1.9 billion offer to buy Georgia Gulf. In addition, Westlake said it plans to liquidate its holdings of Georgia Gulf common stock as market conditions permit. Shares of Georgia Gulf tumbled in extended-hours trading. (Click for after-hours quotes.)

Cablevision - The cable company will sell the Clearview Cinemas chain and has hired Citigroup to advise on the process, according to reports from the Wall Street Journal. Shares of the firm edged higher in extended-hours trading. (Click for after-hours quotes.)

Janus Capital - Gamco disclosed a 5.11 percent stake in the investment firm in its 13D filing. (Click for after-hours quotes.)

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