Shareholders of Airvana voted Friday to approve the sale of the company to buyout firms in a deal valued at $540 million. The company was bought by 72 Mobile Holdings LLC, which is owned by S.A.C. Private Capital Group LLC, GSO Capital Partners LP, Sankaty Advisors LLC and ZelnickMedia. Airvana stockholders will get $7.65 in cash per share, a 23 percent premium over the company's closing stock price on the day in December when the sale was announced. Article