Justin Whitlock Dart, Sr. (August 17, 1907 – January 26, 1984) was considered the "boy wonder" of the drug store industry. In college Dart had played football for Northwestern University.
He was born on August 17, 1907.
After marrying Ruth Walgreen, Dart became an executive with his father-in-law's (Charles Walgreen) company, the Walgreens Drugstore chain. At Walgreens, he introduced the concept of placing the pharmacy counter at the back of the drug store, which not only provided privacy for medical concerns, but forced patrons to walk past many items for possible purchase.
Dart divorced his first wife, Ruth Walgreen, and left the Walgreen company shortly after. In 1943, Dart took control of the Boston-based United Drug Company. The chain operated under the Ligget, Owl, Sonta, and Rexall brands. Soon, Dart rebranded the stores under the Rexall name.
After 35 years, Dart sold his stake in Rexall in 1978. Not long afterwards, he said "I would like my retirement and death to be simultaneous." During these years, Dart had acquired stakes in Avon, West Bend Housewares, Duracell, Ralph Wilson Plastics, Archer Glass and Hobart, which were collectively known as Dart Industries.