Check out which companies are making headlines before the bell on Monday:
Yum Brands - Yum reported its closely watched China sales fell by 10 percent in August. However, the parent of KFC, Taco Bell, and Pizza Hut also said it expects sales growth to resume in China for the current quarter.
Delta Air Lines - Delta will join the S&P 500 after the close of trading Tuesday, replacing BMC Software. BMC is being acquired by Bain Capital.
GlaxoSmithKline - Glaxo is selling two drink brands to Japan's Suntory in a $2.1 billion deal. The pharmaceutical company will use the money to pay down debt, as well as for general corporate purposes.
Expedia - The stock was upgraded to "buy" from "neutral" at Lazard Capital Markets, citing better than expected benefits from a strategic marketing agreement with rival Travelocity, among other factors.
Microsoft - The company is putting its Xbox Music streaming service up for free on the internet, in hopes of drawing more customers into its ecosystem.
Jacobs Engineering - Jacobs is buying Sinclair Knight Merz for $1.2 billion. Sinclair is an Australian consulting and engineering firm.
Vodafone - Vodafone may not get the required shareholder approval for its deal to buy German cable giant Kabel Deutschland, according to the Financial Times.
Amazon.com - Amazon is denying reports that it would launch a free smartphone this year. Amazon said if it did launch such a product in the future, it would not be free to consumers.
BlackBerry - BlackBerry may see a bid from 10 percent shareholder Fairfax Financial Holdings, according to a report in London's Sunday Times. The paper said Fairfax's Prem Watsa has gotten billions in backing from Canada's biggest pension funds in preparation for a bid.
Crown Castle - The owner and operator of wireless communication towers has begun the process of converting itself to a real estate investment trust. It expects to assume REIT status as of January 1, 2014.
Lululemon - Citi began coverage on the athletic apparel retailer with a "buy" rating, saying it's generally bullish on specialized apparel firms because of better prospects for sales and profit margins.
Wal-mart - Goldman Sachs resumed coverage on the retail giant with a "buy" rating, saying has a "modest but durable growth profile" that is currently undervalued by investors.
—By CNBC's Peter Schacknow
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