Check out which companies are making headlines before the bell:
Alibaba—The China online retailer earned an adjusted 48 cents per share for its latest quarter, 6 cents above estimates, and revenue also beat Street forecasts. Alibaba also announced that Chief Operation Officer Daniel Zhang will become CEO as of May 10.
Priceline Group—The travel website operator reported quarterly profit of an adjusted $8.12 per share, above estimates of $7.72, with revenue also beat consensus. Priceline cited strong growth in bookings for hotel rooms and rental cars, among other factors.
Procter & Gamble—P&G's hair care business is drawing interest from a variety of private equity firms, according to the New York Post, and that the business could bring in as much as $5 billion.
Costco—The retailer reported flat same-store sales for April, compared to estimates of a 0.3 percent increase.
Ann Inc.—Ann is reportedly in talks to sell itself to Golden Gate Capital for about $2 billion, according to Reuters. Ann Inc. is the parent of retailer Ann Taylor.
Lumber Liquidators—Lumber Liquidators is halting sales of all its Chinese laminate flooring effective immediately.
Taser—Oppenheimer downgraded Taser to "perform" from "outperform," saying the stock is fully valued after the stock met and exceeded its prior price target.
Dick's Sporting Goods—BMO Capital upgraded the retailer to "outperform" from "market perform" on optimism about the company's growth prospects.
Becton Dickinson—The medical products maker earned $1.61 per share for its latest quarter, 8 cents above estimates. Revenue also beat forecasts despite the impact of a strong dollar.
Time Inc.—Time lost 6 cents per share for its latest quarter, compared to an expected loss of 20 cents, with revenue very slightly below forecasts. The magazine publisher's overall results were hurt by weaker ad sales and fewer subscriptions.
Regeneron Pharmaceuticals—Regeneron earned an adjusted $2.88 per share for its latest quarter, 16 cents above estimates, with revenue beating forecasts by a wide margin. The drug maker was helped by a surge in sales for its eye drug Eyelea.
Keurig Green Mountain—Keurig missed estimates by 2 cents with adjusted quarterly profit of $1.03 per share. Revenue was essentially in line, but the coffee brewing system maker cut full-year sales and profit forecasts on difficulty in convincing consumers to buy its Keurig 2.0 system.
21st Century Fox—Fox beat estimates by 8 cents with quarterly profit of 47 cents per share, with revenue in line. Fox was helped by better cable system and movie studio results.
Whole Foods—Whole Foods matched Street forecasts with quarterly profit of 43 cents per share, though revenue fell slightly short of estimates as sales growth slowed. The grocery chain also announced plans to open smaller, value-oriented grocery stores in 2016.
Zynga—Zynga lost 1 cent per share for its latest quarter, compared with analyst estimates of a 2 cent loss. Revenue was above estimates, even though the online game maker saw active user numbers down compared to a year ago. Zynga also announced it would cut its workforce by 18 percent to save $100 million annually.
Tesla—Tesla lost 36 cents per share for its latest quarter, a smaller loss than the 50 cents analysts were forecasting. Revenue beat estimates, and the automaker stuck to its prior forecasts for deliveries and sales.
Activision Blizzard—Activision Blizzard reported adjusted quarterly profit of 16 cents per share, beating estimates of 7 cents, with revenue well above analyst forecasts. The video game maker also raised its full year profit forecast, as its higher margin digital business improves.
MetLife—MetLife beat estimates by 3 cents with adjusted quarterly profit of $1.44 per share, though revenue was shy of consensus. The largest U.S. life insurer's results benefited from better investment results and gains from its derivatives program.
Transocean—Transocean nearly doubled the consensus analyst estimate of 60 cents per share with adjusted quarterly profit of $1.10 per share. Revenue also beat estimates, as oil rig utilization rose compared to the prior quarter.
TripAdvisor—TripAdvisor fell 1 cent short of estimates with adjusted quarterly profit of 54 cents per share, with revenue also short. The operator of the travel review website did report a 29 percent jump in revenue compared to a year earlier from higher ad sales.