BOULDER, Colo.--(BUSINESS WIRE)--Zayo Group Holdings, Inc. (“Zayo” or “the Company”) (NYSE: ZAYO), a leading provider of bandwidth infrastructure and network-neutral colocation and connectivity services, announced results for the three months ended June 30, 2015. Fourth fiscal quarter revenue of $361.9 million grew 25% over the previous quarter on an annualized basis. Adjusted EBITDA of $210.9 million increased 24% over the previous quarter on an annualized basis. Operating income for the quart