Where employer’s equity investors owned property and business used that property rent-free, owners engaged in a common trade or business with the employer for purposes of withdrawal liability under ERISA.The 7th U.S. Circuit Court of Appeals affirmed a decision by Judge Joan H. Lefkow, Northern District of Illinois.In 2000, Anthony and Pat Pitello purchased property at 2035 N. 15th Avenue in Melrose Park. The two brothers purchased the property with their father, Pat M. Pitello. Gradei’s Express Co. and GX Warehousing both …