Acadia Healthcare Company (NASDAQ: ACHC), a serial acquirer in the behavioral health care space, is getting some competition. American Addiction Centers, a subsidiary of AAC Holdings, Inc. (NYSE: AAC) announced its sixth acquisition in 2015, following its IPO in October 2014. The most recent acquisition was for The Oxford Centre, Inc., a 76-bed residential facility in Tupelo, Mississippi, for $35 million. According AAC, the center generated revenue of approximately $12.2 million and adjusted EBITDA of approximately $5.6 million for the year ended December 31, 2014. So far this year, Acadia Healthcare has announced just one acquisition, but then, it is still digesting some larger acquisitions made in 2014