Check out which companies are making headlines before the bell:
Wal-Mart–The retail giant earned $1.10 per share, excluding certain items, for the first quarter, five cents below estimates. Revenue and the company's second quarter forecast were also shy of Street consensus. Wal-Mart said weather shaved three cents per share off its quarterly results.
General Motors–The automaker is recalling more than 140,000 Chevy Malibu models to fix a potential issue with power-assisted brakes. A software problem could potentially disable the brakes, according to the company.
Bristol-Myers Squibb–The drug maker's stock was downgraded by BMO to "market perform" from "outperform", with the firm saying new data about a Bristol cancer treatment negates some of the potential optimism it had had previously.
Gentiva Health Services–Kindred Healthcare is proposing to acquire Gentiva for $14.00 per share, half in cash and half in stock, although the company said it was willing to make the offer all cash if the Gentiva board wants that to occur.
Urban Outfitters–FBR Capital downgraded the retailer's stock to "market perform" from "outperform", saying it was likely to trade sideways this year as comparable sales become tougher.
Cisco Systems–The networking equipment maker reported fiscal third quarter profit of 51 cents per share, excluding certain items, three cents above estimates. Revenue also exceeded expectations, although it fell from a year earlier.
Apple–The tech giant may not be able to finalize a $3.2 billion purchase of Beats Electronics this week, according to Re/code, a longer timetable than many were expecting. No specific reason has been cited for the delay.
Agilent–Agilent reported fiscal second quarter profit of 72 cents per share, excluding certain items, one cent below estimates, with the company's current quarter earnings forecast also below expectations. Agilent incurred a number of expenses related to the planned spinoff of its electronic measurement business.
Vipshop–The company earned 63 cents per share, excluding certain items, for the first quarter, 15 cents above estimates. The Chinese online retailer also beat forecasts for revenue, and its current quarter revenue projection is similarly upbeat as it attracts more customers and orders.
AstraZeneca–The drug maker unveiled promising data on an experimental lung cancer drug, which analysts say could give the drug company more ammunition to make a case for a higher takeover bid from Pfizer.
National Grid–The British utility company is planning to spend $2.5 billion this year on protection against storms for its U.S. cables and pipelines, up from $2 billion last year.
SeaWorld Entertainment–SeaWorld lost 56 cents per share for the first quarter, wider than the 49 cents forecast by analysts. The theme park operator cited poor weather as well as a shift in timing of the Easter holiday and school-related spring breaks.
—By CNBC's Peter Schacknow
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