Early movers: BRCM, COST, EXPR, ANF & more

Getty Images. These are the stocks posting the largest moves before the bell.

Check out which companies are making headlines before the bell:

Broadcom (NASDAQ: BRCM)-Avago Technologies (NASDAQ: AVGO) will buy the chip maker for $37 billion in cash and stock, consisting of $54.50 in cash and 0.4378 Avago shares for each share of Broadcom.

Costco (NASDAQ: COST)-Costco reported quarterly earnings of $1.17 per share, 2 cents above estimates, though revenue and comparable store sales were below forecasts. The warehouse retailer was hurt by lower gasoline prices and a stronger dollar.

Express (NYSE: EXPR)-The apparel retailer reported adjusted quarterly profit of 22 cents per share, seven cents above estimates. A comparable store sales increase of seven percent helped push revenue above analyst forecasts, and Express has now raised its full year guidance.

Abercrombie & Fitch (NYSE: ANF)-Abercrombie lost 53 cents per share for its latest quarter, wider than the 34 cent consensus estimate. Revenue missed forecasts amid an eight percent drop in comparable-store sales. The apparel retailer did say it sees sales improving, and that it will see continued headwinds from foreign currency fluctuations.

Chipotle Mexican Grill (NYSE: CMG)-Miller Tabak upgraded the restaurant chain's stock to "buy" from "hold," noting the stock's nearly 20 percent drop over the past month along with its forecast of at least 25 percent growth through 2016.

Sanderson Farms (NASDAQ: SAFM)-The poultry producer reported quarterly profit of $3.13 per share, below estimates of $3.32, with revenue also below estimates. Sanderson did say it is optimistic heading into the summer months, although it did mention "disease outbreaks" as a possible risk.

General Motors (NYSE: GM)-Morgan Stanley upgraded the automaker's stock to "equal-weight" from "underweight," saying various market forces may push GM to consider more radical strategic changes.

Palo Alto Networks (NYSE: PANW)-The cybersecurity firm reported adjusted quarterly profit of 23 cents per share, three cents above estimates. Revenue, however, fell below Street forecasts, as is its current quarter revenue projection.

GoPro (NASDAQ: GPRO)-The maker of high definition cameras is introducing a new six-camera device to capture spherical video, as well as a quadcopter drone. It announced the new products at the Code Conference in California.

Teva Pharmaceutical (Tel Aviv Stock Exchange: TEVA-IL)-Teva disclosed a 1.35 percent stake in Mylan (NASDAQ: MYL), which the drug maker wants to buy. Its $82 per share offer for Mylan was rejected last month as "grossly undervalued."

Google (NASDAQ: GOOGL)-Google chief business officer Omid Kordestani confirmed reports that Google will institute a "buy button" that will allow purchases directly from search results pages.

General Electric (NYSE: GE)-GE's unit that funds leveraged buyouts is near the end of an auction process that could fetch more than $17 billion. The Wall Street Journal said KKR, Apollo Global, and Ares Management are among the private equity firms expected to submit final bids today.

Alibaba (NYSE: BABA)-The China-based online retailer is focusing on adding more next-day delivery services, according to an executive quoted by Dow Jones.

Sirius XM (NASDAQ: SIRI)-The satellite radio operator will have to face a class action lawsuit involving royalties for pre-1972 songs. Members of the 1960s group The Turtles had sought class action status in the case, which claims copyright infringement because no royalties are paid on those songs.

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