ampm

ampm (rarely "am/pm") is a convenience store chain with branches located in several U.S. states, including Arizona, California, Nevada, Oregon, Washington and in several countries such as Costa Rica and Brazil. The brand pulled out of the Eastern United States in 2012, but returned a decade later.

The ampm brand is owned by BP America, Inc., a subsidiary of BP, which acquired its founding owner, Atlantic Richfield Company (ARCO), in 2000. In the United States, the stores are usually attached to an ARCO or BP-branded gas station. The first location opened in Southern California in 1978.