NEW YORK (AP) -- Stocks that moved substantially or traded heavily Wednesday on the New York Stock Exchange and Nasdaq Stock Market:
Chesapeake Energy Corp., up $1.14 at $20.11
Aubrey McClendon, the energy company's CEO, is leaving Chesapeake amid philosophical differences with its new board of directors.
Robert Half International Inc., up $2.21 at $35.74
The staffing company said fourth-quarter profit jumped almost 38 percent as demand grew for temporary and full-time workers.
Manpower Inc., up $3.23 at $51.78
Fourth-quarter net income dropped 16 percent at the staffing company, but its adjusted results topped Wall Street expectations.
MeadWestvaco Corp., down $1.30 at $31.63
Despite posting a fourth quarter profit, the packaging company's results fell short of what Wall Street expected.
Freescale Semiconductor Ltd., up $1.84 at $14.23
The chip maker reported fourth-quarter results and offered a first-quarter revenue forecast that topped Wall Street's expectations.
Amazon.com Inc., up $12.41 at $272.76
The world's biggest online retailer impressed investors with strengthening profit margins in its fourth-quarter earnings report.
Research In Motion Ltd., down $1.88 at $13.78
Shares of the company fell after the smartphone maker's CEO introduced the long-delayed BlackBerry 10 in New York.
Copano Energy LLC, up $4.90 at $38.03
Kinder Morgan Energy Partners LP said it will buy the natural gas company for about $3.2 billion in stock.
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