NSR Petro Service operates 48 unbranded and Sunoco-branded convenience stores in the Baltimore-Washington metropolitan areas.

Its convenience stores range in size from small kiosks to 4,500 square feet, with the average store clocking in at about 2,000 square feet. Stores located in neighborhoods carry grocery items such as pet food and paper goods. Stores have a small section of health and beauty products, offering full and convenience sizes of pain relievers and cold remedies, with some units providing car washes.

For benchmarking purposes, store counts are as of Jan. 1, 2023.

Headquarters:Greenbelt, Maryland
No. of Stores:48
Rank Last Year:136