Some of the names on the move ahead of the open Tuesday:
Apple - Piper Jaffray calls consensus estimates for Apple's March and June quarters too high, but says new product launches mean investors will look to the second half of the year for opportunity. Analyst Gene Munster also believes Apple will increase its dividend to around $14 per share from the current $10.60.
Boeing - The jet maker said the first test of its new battery system for the 787 jet went according to plan, meaning the company can now move on to formal testing, putting the jet one step closer to returning to service. (Read More: Dreamliner Takes To Sky in First Flight Check)
Sonic - Sonic earned $0.05 per share for its second quarter, matching estimates, with revenues slightly below estimates. However, the restaurant chain did see higher than expected profit margins, as it benefited from lower expenses, and also saw increased traffic as it ramped up marketing efforts and redesigned its menu.
Magellan Health Services, Vanguard Health Systems - The health care providers have lost bids to renew Arizona Medicaid contracts that expires in September. Magellan and Vanguard share the contract, with Magellan earning a quarter of its total 2012 revenue from that agreement.
General Motors - The automaker kicks off an effort to revamp its Buick brand, introducing new versions of its Regal and LaCrosse models.
Baidu - Baidu has won dismissal of a U.S. censorship lawsuit. The suit had been brought by pro-democracy activists who were seeking punishment for alleged internet censoring by China's largest search engine company.
Dell - Investor Carl Icahn says he's started preliminary talks with Blackstone Group about teaming up on an offer for Dell. Separate bids from the two were deemed by a Dell special committee yesterday to be potentially superior to the $13.65 per share deal from CEO Michael Dell and his partners. (Read More: Michael Dell Is Biggest Wildcard in Fight for PC Maker)
Children's Place - The children's clothing retailer reported quarterly profit of $1.15 per share for its latest quarter, excluding certain items, 11 cents above estimates. But its current quarter project of $0.60 to $0.65 and its fiscal year outlook of $2.90 to $3.10 are both well below Street estimates. Children's Place says bad weather and a weak economy will hurt its results.