In 1956, Van Gorkom joined TransUnion, the third largest credit bureau in the United States, as comptroller.[3] He later served as TransUnion's chief executive officer from 1962 to 1980.[2] In September 1980, in a move that would later prove highly controversial, Van Gorkom contacted Jay Pritzker and offered to merge TransUnion with the Marmon Group, a company controlled by Pritzker, with the Marmon Group acquiring TransUnion at a price of $55/share.[4]
In January 1980, Van Gorkom became president of the Chicago School Finance Authority, a body newly created by the Government of Illinois to turn around the Chicago Public Schools, which were running a $94 million annual operating deficit.[3] In this capacity, Van Gorkom was widely credited with turning around the schools' finances.[3]
In the meantime, the case of Smith v. Van Gorkom, a class action suit brought on behalf of TransUnion shareholders, was winding its way through the courts. The lawsuit claimed that Van Gorkom and the board of directors of TransUnion had violated their fiduciary duty to shareholders in recommending the acquisition of TransUnion by the Marmon Group at the price of $55/share. On July 6, 1982, the Delaware Court of Chancery ruled in favor of Van Gorkom and the TransUnion directors, finding that their actions were protected by the business judgment rule. The Supreme Court of Delaware overruled this decision on January 29, 1985, holding that the directors were grossly negligent, because they quickly approved the merger without substantial inquiry or any expert advice. For this reason, the board of directors breached the duty of care that it owed to the corporation's shareholders. As such, the protection of the business judgment rule was unavailable. This decision sent shockwaves through the U.S. business community, and led to directors and officers liability insurance becoming much more expensive. Daniel Fischel criticized the Smith v. Van Gorkom opinion as "one of the worst decisions in the history of corporate law."[5] Van Gorkom, previously a well-liked member of the Chicago business community, was criticized in some quarters for his performance in negotiating the merger of TransUnion.[3]
Van Gorkom lived in Lake Forest, Illinois, for forty years.[3] He received an honoraryLL.D. from Lake Forest College in 1988.[6] Van Gorkom died in Lake Forest on March 17, 1998, at the age of 80.[3] He was survived by his wife, Betty Jean (Alexander) Van Gorkom, and two daughters, Gayle (Van Gorkom) Richardson and Lynne (Van Gorkom) Villalobos.[3] He has 9 grandchildren and 16 great-grandchildren.