Hammer Williams Co. operates 29 Jack's General Store and Jiffy Trip c-stores throughout Oklahoma.

K.V. Williams and Larry Hammer opened their first c-store in Cherokee, Okla., with a commitment to teamwork, community, operating fundamentals and innovation, according to Jiffy Trip's website. Jiffy Trip has a Fleet Program that helps fleet expense management by combining the ease of consolidated fuel expense reporting with pay-at-the-pump acceptance, according to its website. The program is driven by Mannatec and allows drivers to save up to 5 cents per gallon. A Jiffy Trip app is in the works.

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

Headquarters:Enid, Oklahoma
No. of Stores:29