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Check out which companies are making headlines before the bell:

ConAgra — ConAgra and activist investor JANA Partners amended their existing cooperation agreement, with the foodmaker's board agreeing to nominate JANA designees Bradley Alford and Timothy McLevish as directors. The agreement also retains various standstill provisions for JANA. Separately, a Barron's article said ConAgra shares could rise up to 30 percent, as the food company sells businesses, improves existing brands, and lowers expenses.