No. 578: Wm. Wrigley Jr., 48, Lake Forest, chewing gum, $2.2BBill 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 © 2018, Los Angeles Times Wm. Wrigley Jr. Co. Mars, Inc.