Known for its self-serve foodservice options, Piedmont Petroleum Corp., a second-generation, family-operated business, runs Corner Market stores throughout upper South Carolina. With stores open late for customer convenience–several 24 hours a day—locations offer CITGO-branded fuel. Inside stores, the plan-o-gram emphasizes beer and wine with an emphasis on national beer brands: coolers average five doors per store for beer stock. The cold vault stocks eggs, cheese and milk in various sizes, and stores receive weekly deliveries of fresh bananas, apples and oranges.

Piedmont is deeply entrenched in its local communities, demonstrated by its sponsorship of charity events that support causes such as Mountain GOAT (Great Outdoor Adventure Trips for Kids), the Muscular Dystrophy Association, Harvest Hope Food Bank and Safe Harbor, a domestic violence prevention group.

For benchmarking purposes, store counts are year-end 2019.

Headquarters:Greenville, South Carolina
No. of Stores:31
Rank Last Year:175