[7] Stack and his siblings purchased Dick's from their father in the early 1980s, when the company had two locations in Upstate New York.
[2][3] Stack established a board of directors, opened additional stores, and relocated the company's headquarters to Pittsburgh in 1994.
[2][3] Stack owned approximately 25 percent of the company's common stock, and controlled nearly two-thirds of its voting shares, as of 2010.
[3] In addition, Stack reported to destroy $5 million worth of assault-style-type rifles then in Dick's inventory.
[12][13][14] He has advocated for stronger gun control and worked to enact change by hiring lobbyists and meeting with politicians.
[18] Stack has served on the boards of the Greater Pittsburgh Chamber of Commerce, KeyCorp,[19] the National Retail Federation,[20] and Seton Hall University,[7] as well as the advisory board of Wharton School of the University of Pennsylvania's Jay H. Baker Retailing Initiative.