The phrase "a primary provider of" is correct and usable in written English.
It can be used when describing an entity that is a main source or supplier of a particular service or product.
Example: "The company has established itself as a primary provider of renewable energy solutions in the region."
Alternatives: "a leading supplier of" or "a key source of".
Gilat, a primary provider of products to GE Spacenet, will pay five million newly issued shares.
Harvard University Information Technology HUITT) is a primary provider of IT services to the Harvard community.
"We want to be a primary provider of operating systems for people who want servers both to connect to the cloud, and to build their own cloud systems".
Qwest Communications International and AOL Time Warner signed a deal under which Qwest will become a primary provider of high-speed access and other network services to AOL Time Warner.
The Division of Pediatric Cardiology at Duke University Medical Center is a primary provider of cardiovascular diagnostic and treatment services in the southeastern United States.
The Division of Pediatric Cardiology, which is an integral part of the Duke Pediatric and Congenital Heart Center, is a primary provider of inpatient and outpatient cardiovascular diagnostic and treatment services in the southeastern United States.
Xerox and GE Capital, both based in Stamford, Conn., are completing an agreement for GE Capital to become the primary provider of equipment financing for Xerox customers in the United States.
SquareTrade, an online dispute resolution service, has emerged as eBay's primary provider of such services.
The company is the primary provider of cable television on Long Island.
The male is the primary provider of food to the young, bringing them regurgitated insects.
Qwest is the primary provider of telephone service in 14 states, mostly in the Midwest and the Great Plains.
