Overland Park, Kan.-Shares of Compass Minerals were up 7.55 percent on Monday, March 2, amid rumors that German fertilizer giant K+S Group, also known as Kali und Salz, was readying a bid for Compass. Both companies are in the salt and fertilizer business. The acquisition would give K+S a stronger position in North America, though it already has a fertilizer presence with K+S North America. Neither Compass Minerals nor K+S were reported to have confirmed the deal, which was reported by overseas wire services. Compass Minerals is a producer of minerals, including salt, sulfate of potash specialty fertilizer, and magnesium chloride.