Chick-fil-A, Inc. is an American fast food restaurant chain and the largest chain specializing in chicken sandwiches. Headquartered in College Park, Georgia, Chick-fil-A operates restaurants across 48 states, as well as in the District of Columbia and Puerto Rico. The company also has operations in Canada and the United Kingdom, and previously had restaurants in South Africa. Chick-fil-A has announced plans to open stores in both the UK and Singapore in late 2025. The restaurant has a breakfast, a lunch, and a dinner menu. The chain also provides catering services.

Bojangles OpCo, LLC., doing business as Bojangles, is an American regional chain of fast food restaurants that specializes in Cajun-seasoned fried chicken and buttermilk biscuits and primarily serves the Southeastern United States. The company was founded in Charlotte, North Carolina in 1977 by Jack Fulk and Richard Thomas.

International Dairy Queen, Inc. (DQ) is an American multinational fast food restaurant chain founded in 1940 and headquartered in Bloomington, Minnesota. The first Dairy Queen was owned and operated by Sherb Noble and opened on June 22, 1940, in Joliet, Illinois. It serves a variety of hot and fried food, as well as original frozen dairy products that vary from location to location.

Steak 'n Shake Operations, Inc., doing business as Steak 'n Shake, is an American fast food chain concentrated primarily in the Midwestern United States along with locations in the rest of the country plus locations in Western Europe. The company is headquartered in Indianapolis, Indiana, and is a wholly owned subsidiary of Biglari Holdings.

Whataburger is an American regional fast food restaurant chain, headquartered and based in San Antonio, Texas, that specializes in hamburgers. Founded by Harmon Dobson and Paul Burton, it opened its first restaurant in Corpus Christi, Texas in 1950. Family-owned by the Dobsons until 2019, the chain is now managed by the private equity firm BDT & MSD Partners; the Dobson family still holds a small stake.

Arby's Restaurant Group, Inc. doing business as Arby's is an American fast food sandwich restaurant chain with more than 3,300 restaurants. The flagship property of Inspire Brands, it ranked third in systemwide sales in the United States in the quick-service and fast-casual restaurant industries in 2012, behind Subway and Panera Bread. In October 2017, Food & Wine called Arby's "America's second largest sandwich chain ".

Sonic Corporation, founded as Sonic Drive-In and more commonly known as Sonic, is an American drive-in fast-food chain owned by Inspire Brands, the parent company of Arby's, Jimmy John's, Buffalo Wild Wings, Baskin-Robbins, and Dunkin'. Sonic, founded by Troy N. Smith Sr., opened its first location in 1953, under the name Top Hat Drive-In. Originally a walk-up root beer stand outside a log-cabin steakhouse selling soda, hamburgers, and hot dogs, Sonic currently has over 3,400 locations in the United States.

Captain D's, LLC. is an American fast casual restaurant chain that specializes in seafood and is headquartered in Nashville, Tennessee. The chain was founded as Mr. D's Seafood and Hamburgers by Raymond L. Danner Sr. on August 15, 1969, in Donelson, Tennessee. The chain is currently owned by private-equity firm Centre Partners. Captain D's currently has more than 500 locations in the United States.

Burger King Corporation is an American fast food chain of hamburger fast food restaurants, headquartered in Miami-Dade County, Florida. The company was founded on July 23, 1953, as Insta-Burger King, a Jacksonville, Florida–based restaurant chain. After Insta-Burger King ran into financial difficulties, its two Miami-based franchisees David Edgerton (1927–2018) and James McLamore (1926–1996) purchased the company in 1959.