Check out the companies making headlines after the bell Tuesday:
Shares of Norfolk Southern jumped after Canadian Pacific announced its merger offer letter. The deal proposes creating a transcontinental railroad "with the scale and reach to deliver improved levels of service to customers and communities while enhancing competition and creating significant shareholder value," Canadian Pacific said, in a statement.
Citrix Systems fell after announcing the initial results of its operations review. The software company said that it expects to cut about 1,000 jobs as part of its "realignment of resources" plan.
Alphabet got a small boost when it announced new changes to its Google+ platform. According to a company blog, the updates will make it "much simpler" and more "mobile-friendly."
CORRECTION: Shares of Norfolk Southern jumped after the bell Tuesday. The company's name was misstated in an earlier version of this article.