The stock was last quoted at $8.51, up 13.8%, on volume of nearly 60,000, according to Nasdaq.com. For the first quarter, SunPower said it sees a non-GAAP loss of 5 to 20 cents a share on revenue ranging from $500 million to $575 million. Check out TheStreet's quote page for SunPower for year-to-date share performance, analyst ratings, earnings estimates and much more.Baidu ( BIDU) shares were heavily traded in the extended session as well, rising 1% to $143.25 on volume of 2.4 million, after the China-based Internet search provider topped Wall Street's earnings expectations. True to its history, the stock was volatile in late trades, swinging between a high of $148.50 and a low of $136.04. Investors were likely balancing the fourth-quarter beat against Baidu's forecast for first-quarter revenue of between $666.5 million to $688 million, a sequential decline from its fourth-quarter total of $710.9 million. Also active in after the bell was VCA Antech ( WOOF), whose stock lost more than 6% to $21.58 on volume of more than 125,000, after the veterinary hospital operator reported a fiscal fourth-quarter adjusted profit of $18.1 million, or 21 cents a share, falling short of the consensus view for earnings of 25 cents a share in the quarter; and Qlik Technologies ( QLIK), whose shares tumbled 7.4% to $29 on volume of less than 200,000 after the Radnor, Pa.-based business data analysis software company gave a disappointing outlook for the current quarter, forecasting a non-GAAP loss of 6 to 8 cents a share on revenue of $76 million to $78 million, below the average analysts' estimate for earnings of 2 cents a share on revenue of $80.3 million. -- Written by Michael Baron in New York. >To contact the writer of this article, click here: Michael Baron.