Boeing — Investigators determined that the Friday fire on a 787 Dreamliner aircraft at Heathrow Airport was not caused by a battery issue.
Alexion Pharmaceuticals — The company could get another bounce today, with Reuters now reporting that Switzerland's Roche is seeking financing for a possible Alexion bid. The stock had risen Friday following a Bloomberg News report that such a bid was in the offing.
McKesson — The company finds itself in the crosshairs of proxy advisor ISS, which is urging shareholders to vote against re-election of four of the drug distribution company's directors. ISS is telling shareholders McKesson has persistently failed to address concerns about executive compensation.
General Electric — GE is preparing a $5.3 billion bid for British engineering firm Invensys, according to London's Sunday Times. Such an offer would top last week's bid from France's Schneider Electric.
Taylor Capital Group— The commercial banking company is being bought by rival commercial bank MB Financial for $22 per share in cash and stock, or about $680 million. The deal represents a 26 percent premium to Taylor's Friday closing price.
BlackBerry — The smartphone maker is seeing prices of its new Z10 smartphone discounted by as much as 75 percent by major carriers like AT&T Wireless and Verizon Wireless. The Wall Street Journal reports that a discount this soon after launch suggests the phone is not selling well.
Yahoo — MKM Partners has initiated coverage on the search giant with a "buy" rating, pointing to Yahoo's new management team among a number of positive factors.
Gap — Piper Jaffray downgraded the stock to "neutral" from "overweight", saying the shares now fully account for expected earnings increases.
Yelp —The online ratings website was downgraded to "neutral" from "buy" at UBS on a valuation basis, with UBS still calling Yelp one of the best positioned businesses in its coverage universe.
Tiffany — The luxury retailer's stock was upgraded to "buy" from "hold" at Stifel Nicolaus, based on a growing "wealth effect" in the U.S. economy as well as falling prices for precious metals.
UPS — JPMorgan Chase, BB&T, and Raymond James have all downgraded UPS stock after the delivery service cut its earnings forecast for the year on Friday.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Peter Schacknow
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