Thaddeus Wong is the co-founder of @properties, the largest independently owned residential real estate brokerage firm in Illinois. It is one of the 11 largest brokerage firms in the U.S. by sales volume.

Wong began selling real estate in the mid 1990s and quickly established himself as one of the top selling brokers in the city of Chicago.

In 2000 Wong and business partner Michael Golden established @properties. Within 16 years they grew the company from $40 million in sales to over $7 billion in annual sales. Today, @properties has 23 offices in the city of Chicago, surrounding suburbs, southwest Michigan and southeast Wisconsin. The firm has divisions for residential and commercial brokerage, development marketing, relocation, property management and institutional-advisory services.