Maggiora and Calo paid $990,000 for Unit #3S in Aug. 2004.
The property was on the market for $1.2 million.
Mr. Mallers served as president of First American Discount Corporation, a futures brokerage in Chicago. The firm, which was the world's largest family owned and operated futures retailer, was purchased by ED&F Man International Inc.
His father, Bill Mallers Sr., was the founder of First American Discount Corp. and a former chairman of the Chicago Board of Trade.
Calo has served as a vice president at Citigroup.
Address: 1807 North Orleans Street
Buyer(s): William J Mallers Jr and Brook S Royse-Mallers
Seller(s): Giovanni Maggiora and Ilaria Calo
Sale date: Nov. 23, 2007