GTT Communications, Inc. (“GTT”) (NYSE MKT: GTT), a global cloud networking provider to multinational enterprises will present at William Blair’s 34th Annual Growth Conference being held in Chicago, IL on June 10-12, 2014. Rick Calder, President and CEO, will present on Tuesday, June 10 th at 12:10 p.m. CT. A webcast of this presentation will be available on the GTT website at http://www.gtt.net/investor-relations/. About GTT GTT operates a global Tier 1 IP network with the most interconnected Ethernet service platform around the world. We provide highly reliable, scalable and secure cloud networking services. Our clients trust us to deliver solutions with simplicity, speed, and agility that are unmatched by other network providers. For more information visit GTT www.gtt.net.