No. 564: Wm. Wrigley Jr., 47, Lake Forest, chewing gum, $2.1BBill Wrigley, Jr., executive chairman and chairman of the board of the Wm. Wrigley Jr. Co., holds a press conference in April 2008 to announce the merger to Mars Inc. (Michael Tercha/Chicago Tribune) Copyright © 2017, The Baltimore Sun, a Baltimore Sun Media Group publication | Place an Ad Wm. Wrigley Jr. Co. Mars, Inc.