Groupon
Andrew Mason, founder and CEO of Groupon.
Employees at Groupon headquarters, 600 W. Chicago Ave., Wednesday, January 12, 2011. | John H. White~Sun-Times
Groupon headquarters in Chicago.
Employees at Groupon headquarters, 600 W. Chicago Ave. | John H. White~Sun-Times
Workers at Groupon headquarters, 600 W. Chicago Ave. | John H. White~Sun-Times file photo
Groupon founder and CEO Andrew Mason.
4-17-09 Groupon Chicago. 600 West Chicago Avenue. Chicago, Illinois. Shopping story on this new Web site, Andrew Mason, offers a huge coupon or "groupon" every day and everything from beauty treatments to sporting events. Photo by Scott Stewart/Sun-Times
Not even four years into its life and less than a year after going public, Chicago-based Groupon Inc. is downshifting into an outlook of slower growth, and its earnings news hit its shares hard Tuesday, sending them down 23 percent to a record low of …
