Check out which companies are making headlines before the bell on Tuesday:
DuPont - The chemical giant earned $0.11 per share, excluding certain items, for the fourth quarter, four cents above estimates, despite flat sales and higher costs. Its 2013 outlook, however, was above current estimates.
Verizon Communications - Verizon earned $0.38 per share for the fourth quarter, excluding certain items, 12 cents short of estimates. Its results were impacted by super storm Sandy and the introduction of Apple's iPhone 5.
Travelers - The insurance company scored a big beat by reporting fourth-quarter profit of $0.72 per share, excluding certain items, compared to estimates of 14 cents. Despite the impact of Sandy, it also saw a significant improvement in underwriting margins.
Johnson& Johnson - J&J reported fourth-quarter profit of $1.19 per share, excluding certain items, two cents above estimates. However, its fourth-quarter revenue and 2013 outlook were short of analysts' forecasts.
Boeing - The jetmaker says it will not deliver any new 787 jets until the Federal Aviation Administration approves a compliance method for its recent airworthiness directive on the jet's batteries, and that fix has been implemented. (Read More: Dreamliner Troubles Put Boeing on Edge)
Research In Motion - RIM is considering strategic alliances with other companies once its new BlackBerry 10 models have been launched. CEO Thorsten Heins told Germany's Die Welt that's an option being considered, along with the possible sale of the company's hardware production unit.
Apple - Apple is reportedly set to introduce an iPhone 5S in June, according to China Times, which cited industry sources.
Dish Network - The satellite TV provider reportedly plans to close about 300 Blockbuster stores across the country, shedding 3,000 jobs in the process. The Denver Post said that will leave about 500 locations open in the U.S.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Peter Schacknow
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