Three Oklahoma companies are once again on Fortune magazine's employee-driven list of the best places to work.

QuikTrip Corp., Chesapeake Energy Corp. and Devon Energy Corp. retained their places on the annual 100 Best Companies to Work For list, which was unveiled Thursday morning.

Tulsa-based QuikTrip, which operates more than 670 convenience stores in 11 states, has been on the list for 12 straight years. It ranked No. 48 this year.

Oil and natural gas producers Chesapeake and Devon have been on the list for the past seven years.