Stack owned approximately 25 percent of the company 's common stock , and controlled nearly two-thirds of its voting shares , as of 2010 . After selling 5.8 percent of his holdings in 2013 , he owned around 20 percent of the company , primarily via Class B shares . Following the Stoneman Douglas High School shooting in February 2018 , Stack announced that Dick 's and its subsidiaries would stop selling military pattern semi-automatic rifles and high-capacity magazines , and would not sell firearms to people under the age of 21 . He has advocated for stronger gun control , and worked to enact change by hiring lobbyists and meeting with politicians
Stoneman Douglas High School shooting
Stoneman Douglas High School shooting
Edward W. Stack