Karl Albrecht

Owns discount-supermarket giant Aldi Sud, one of Germany's (and Europe's) dominant grocers. Has 1,000 stores in U.S. across 29 states. Estimated sales: $37 billion. Plans to open New York City store this year. With younger brother, Theo, transformed mother's corner grocery store into Aldi after World War II. Brothers split ownership in 1961; Karl took the stores in southern Germany, plus the rights to the brand in the U.K., Australia and the U.S. Theo got northern Germany and the rest of Europe. Retired from daily operations. Fiercely private: little known about him other than that he apparently raises orchids and plays golf.