Check out which companies are making headlines before the bell:
United Technologies—The industrial conglomerate has named Akhil Johri as its new chief financial officer. Johri had been CFO at Pall Corp., but had spent 26 years at United Technologies prior to that.
Lululemon—The maker of yoga wear and other apparel was upgraded to "outperform" from "market perform" at Wells Fargo, saying the company has now addressed its supply chain issues and that profit margins are reaching a turning point.
American Eagle—Oppenheimer upgraded the teen apparel to "outperform" from "market perform," saying the company's margins appear ready to recover and that it is managing its inventories well.
AutoZone—The auto parts retailer reported fiscal first quarter profit of $7.27 per share, beating estimates by 11 cents, and its revenue was also above estimates as same-store sales rose 4.5 percent.
H&R Block—The tax preparation firm reported an adjusted quarterly loss of 45 cents per share, 3 cents wider than estimates. H&R Block's results were pressured by an increase in expenses.
Diamond Foods—The maker of Pop Secret popcorn and other snacks beat estimates by 3 cents with adjusted quarterly profit of 28 cents per share, although revenue was shy of forecasts. Diamond also saw narrower profit margins compared to a year earlier.
Manchester United—The Glazer family will further cut its stake in the soccer club, with the family trust planning to sell three million shares. The Glazers purchased Manchester United in 2005 for nearly $1.5 billion.
Verizon—The telecoms and broadband company said it continues to see strong wireless customer growth and 4G device adoption during the current quarter, but warned that this trend will put short-term pressure on profit margins.
Amazon.com—Amazon is testing one-hour delivery via bicycle messenger in New York City, according to the Wall Street Journal. The new service is currently called "Amazon Prime Now." Additionally, Amazon introduced a service called "Make An Offer," which gives customers an opportunity to negotiate lower prices.
Valeant Pharmaceuticals—The Canada-based drug maker is dropping its strategy to grow by acquisitions, according to Reuters. Valeant had spent $19 billion on 40 acquisitions since 2008, but recently failed in its attempt to buy Allergan.
T-Mobile US—The wireless service provider announced a proposed public offering of nearly 17.4 million shares of mandatory convertible preferred stock. The shares will have a liquidation price of $50 per share.