Annie's rose in early New York trade after General Mills said it would acquire the producer of organic food for about $820 million. Barnes & Noble fell as the struggling book seller reported quarterly results.
The National Federation of Independent Business said its index of small-business optimism edged higher last month, with more owners expecting conditions to improve in coming months.
JOLTS job openings data for July is due at 10 a.m. Eastern.
A federal lawsuit accused Walt Disney and other leaders in the special effects and animation industry of conspiring to suppress wages through "no-raid" agreements. The lawsuit was filed in San Jose, Calif.
Outside of the U.S., the European Commission announced that Google would have to make more concessions to settle a four-year probe into alleged violation of European competition rules.
Europe formally adopted a package of new sanctions against Russia late on Monday, but said their enforcement would be delayed to assess the sustainability of the cease-fire in Ukraine.
—By CNBC's Katy Barnato