Chesapeake Energy Corp. (NYSE:CHK) stock rallied 9.65 percent to $20.80 in pre-market trading. The company announced Tuesday that its co-founder, chief executive officer and president Aubrey K. McClendon would retire April 1, 2013 and continue to serve as chief executive officer until the appointment of his successor.
Amazon.com, Inc. (NASDAQ:AMZN) stock climbed 8.24 percent to $281.80 in pre-market trading. Its fourth quarter revenue surged 22 percent to $21.27 billion from $17.43 billion in the same period last year. Operating profit climbed 56 percent to $405 million from $260 million in the same quarter last year.
Ultra Petroleum Corp. (NYSE:UPL) stock surged 3.29 percent to $18.50 in pre-market trading. The stock has a 52-week low of $17.24, a 52-week high of $25.71 and $2.74 billion in market capitalization.
Qiagen N.V. (NASDAQ:QGEN) stock advanced 3.10 percent to $20.60 in pre-market trading. The company reported fourth quarter adjusted net income of $82.8 million or $0.34 per share, up from $73.6 million or $0.31 per share in the same period last year and also topped analysts’ estimation of $0.30 per share. Currently, Qiagen expects fiscal 2013 adjusted net profit to be in a range of $1.16 to $1.18 per share, above analysts forecast of $1.10 per share.
Research In Motion Ltd. (NASDAQ:RIMM) shares rose 2.17 percent to $16.00 in pre-market trading. The stock has a 52-week low of $6.22, a 52-week high of $18.32 and $8.06 billion in market capitalization.
KB Home (NYSE:KBH) stock rose 1.50 percent to $18.90 in pre-market trading. The stock has a 52-week low of $6.46, a 52-week high of $18.99 and $1.44 billion in market capitalization.
Facebook Inc. (NASDAQ:FB) stock advanced 1.46 percent to $31.24 in pre-market trading. The company is expected to report fourth quarter net profit of $0.15 per share on revenue of $1.52 billion after the closing bell Wednesday.
Yahoo Inc. (NASDAQ:YHOO) stock advanced 1.37 percent to $19.97 in pre-market trading. The company stock plunged 3 percent in regular trading Tuesday.
UBS AG (NYSE:UBS) stock declined 1.08 percent to $17.36 in pre-market trading. The company stock was downgraded to “neutral” rating from an “outperform” rating at Exane BNP Paribas.