MCLEAN, Va.--(BUSINESS WIRE)--GTT Communications, Inc. (“GTT”) (NYSE: GTT), the leading global cloud networking provider to multinational clients, will present at Craig-Hallum’s 12th Annual Institutional Investor Conference in Minneapolis, MN on May 27, 2015. Mike Sicoli, GTT’s Chief Financial Officer, will meet with investors that day. To view the latest GTT investor presentation, please visit www.gtt.net. About GTT GTT’s global Tier1 IP network connects to any location in the world and with a


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