MCLEAN, Va.--(BUSINESS WIRE)--GTT Communications, Inc. (“GTT”) (NYSE: GTT), the leading global cloud networking provider to multinational clients, today announced its financial results for the second quarter ended June 30, 2015. Highlights include: Second Quarter Revenue increased 97.9% from second quarter 2014. Gross margin expanded by approximately 720 basis points to 45.9% compared to 38.7% in second quarter 2014. Adjusted Earnings before Interest Taxes Depreciation and Amortization (“EBITDA


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