Check out which companies are making headlines before the bell:
Vail Resorts — The resort operator earned $3.14 per share for its latest quarter, 14 cents above estimates, with revenue also beating forecast. The company also raised its quarterly dividend by 30 percent to 81 cents per share. Vail's results were helped by a jump in visitors and higher lift ticket prices.
Dollar General — The discount retailer earned $1.30 per share for its latest quarter, 4 cents above estimates, with revenue also registering a slight beat. Dollar General also raised its quarterly dividend to 25 cents per share from 22 cents.
Party City — The party supplies retailer fell 3 cents short of estimates with adjusted quarterly profit of 72 cents per share, and revenue also missed. However, the company is also making upbeat comments about current year sales, as well as highlighting a reduction in expenses.
Lions Gate — Bernstein named the movie studio its "best pick" in the media space, while reiterating an outperform rating. The firm sees independent studios as beneficiaries of increasing demand for original content.
Canadian Solar — The solar company earned $1.05 per share for its latest quarter, beating estimates of 76 cents, and revenue was also above forecasts. The company saw record shipments of solar modules during the quarter, but it is also giving a downbeat forecast for the current quarter.
Square — The mobile payments company lost 20 cents per share in its first quarter as a publicly traded company. That loss was 7 cents wider than expected, although revenue was well above estimates. That faster-than- expected revenue growth is prompting Square to forecast that it could earn as much as $12 million this year.
Box — Box lost 26 cents per share for its latest quarter, 3 cents less than estimates, and revenue was above Street forecasts. The cloud services company is projecting 30 percent sales growth for the next 12 months.
Volkswagen — Volkswagen's U.S. Chief Executive Officer Michael Horn is leaving the company, six months after the automaker's diesel emissions cheating scandal became public. North American regional chief Hinrich Woebcken will replace Horn on an interim basis.
Valeant Pharmaceuticals — Valeant and R&O Pharmacy have settled all lawsuits between the two, involving an undisclosed payment to Valeant from R&O. The dispute focused on Valeant's billing procedures with specialty pharmacies.
Honda Motor — The automaker will compensate U.S. dealers for losses related to vehicles with airbags made by Japan's Takata Corp., according to Automotive News.
Moody's — The rating agency and California public pension system Calpers have reached a $130 million settlement in a case involving allegedly inflated grades by Moody's for residential mortgage deals that later went sour. Standard & Poor's reached a similar settlement with Calpers in February 2015.
Twitter — Twitter is improving its compensation structure in an effort to stop key talent from leaving the company. Twitter is offering additional restricted stock to workers throughout the company, according to The Wall Street Journal.
Chipotle Mexican Grill — The restaurant chain completed the cleanup of a Massachusetts location that it had temporarily shut after several workers became ill. The restaurant in Billerica is set to reopen Thursday.
Ambac — Ambac Chief Executive Officer Nader Tavakoli is adding the role of CEO of the municipal bond insurer's operating company Ambac Assurance. He replaces Ambac's current Chief Financial Officer David Trick, who has been filling that job on an interim basis. The move follows criticism from a major Ambac shareholder of Tavakoli's pay and performance.