Colgate-Palmolive Company shifted the appointments of three current senior executives, all of whom may eventually succeed chief executive officer Reuben Mark. In February, Mr. Mark said he would likely stay at the company he has run for the past 20 years for the next two to four years. He said at some point he would hand off the chief executive post.Ian Cook was named chief operating officer and will be responsible for all Colgate’s businesses, except Latin America and Hill’s, which ...