> Largest company: Enterprise Crude Oil LLC
> Revenue: $20.9 billion
> Headquarters: Oklahoma City, OK
> Industry: Energy
Since Enterprise Crude Oil LLC’s founding in 2007, the amount of crude oil in Oklahoma’s reported proved reserves has more than doubled. A resource rich state, much of Oklahoma is covered in gas fields and oil wells — and Enterprise profits from offering oil and natural gas transporting and storing services.
> Largest company: Nike, Inc. (NYSE: NKE)
> Revenue: $32.4 billion
> Headquarters: Beaverton, OR
> Industry: Apparel
Footwear and apparel manufacturer Nike was founded in 1964 by University of Oregon track coach Bill Bowerman and university student Phil Knight. Partially through clever marketing — the company is widely recognized by its Swoosh logo — as well as original product design and major endorsement deals, the company grew rapidly. Nike reported $32.4 billion in revenue in 2016. Its headquarters are in Beaverton, about two hours north of the University of Oregon.
> Largest company: AmerisourceBergen Corporation (NYSE: ABC)
> Revenue: $146.8 billion
> Headquarters: Chesterbrook, PA
> Industry: Pharmaceutical distribution
AmeriSourceBergen, a health care supply company, is one of the largest of its kind in the United States — and the largest company of any kind in Pennsylvania. The company employs about 19,000 people and owns 30 distribution centers around the country.
39. Rhode Island
> Largest company: CVS Health Corporation (NYSE: CVS)
> Revenue: $177.5 billion
> Headquarters: Woonsocket, RI
> Industry: Retailer
CVS Health is a retail pharmacy and health care company headquartered in Woonsocket, Rhode Island. Though the company’s retail business comprises a significant share of total revenue, a majority revenue comes its pharmacy segment. CVS was founded in 1963 with a small store in Lowell, Massachusetts and has since grown to nearly 9,700 stores and 90 million customers in its pharmacy benefit management plan.
40. South Carolina
> Largest company: BlueCross BlueShield of South Carolina, Inc.
> Revenue: $7.2 billion
> Headquarters: Columbia, SC
> Industry: Insurance
Columbia-based insurance provider BlueCross BlueShield of South Carolina, Inc. is not only the largest company in the state by revenue, but also one of the largest employers. With $7.2 billion in annual revenue and some 11,000 employees, BlueCross BlueShield covers nearly a million people in South Carolina.