Graham Enterprise Inc. has been associated with petroleum since 1922. The third-generation, family-owned company's convenience stores average more than 2 million gallons per site. Twenty of the sites include car washes. It also supplies approximately 140 additional outlets, with annual fuel volumes of more than 190 million gallons.

GEI operates in northern Illinois and offers the Amoco, BP, Exxon, CITGO, Marathon, Mobil and Shell fuel brands. Previous brands have included Sinclair, ARCO, Kerr-McGee, Phillips 66 and Total and 76.

GEI has additional sites under development, including a rebranding initiative designed to invigorate the sites and position the chain as a market leader in its region.

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

Headquarters:Vernon Hills, Illinois
No. of Stores:37
Rank Last Year:180