Quick-service restaurant chain Wingstop has been acquired by private equity firm Roark Capital Group. Executives from the 440-unit chain made the announcement to 350 staff, franchisees and vendors at its recent national convention at the Palms Casino Resort in Las Vegas, Nev.

The chain is also introducing a new interior store design.

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 Wingstop was founded in 1994 and recently reached a sales milestone of 2 billion wings. It hit the 1 billion wings milestone only three years ago, in 2007.

“Due to the quick pace that we’ve been adding stores, we were able to achieve in three years what originally took 13 years,” said Jim Flynn, Wingstop CEO. “This is an exciting time to be a part of the Wingstop family.”