The companies, all corporate sponsors of the Ryder Cup, hosted individual corporate hospitality units during the golf tournament, plus separate areas for business meetings with clients.
Celtic Manor Resort estimated that more than 5,000 corporate delegates attended the week-long event.
Celtic Manor Resort vice-president (facilities and development) Russell Phillips said: "We found 1 October was the most successful day for our corporate clients and sponsors. They told us that because of the wet weather, it gave them more time to network with their clients."
The resort provided the overall infrastructure and facilities for the sponsors and other companies using the Ryder Cup for corporate events. Services included the communication network from Virgin Media Business that allowed staff to administer the event.