Press Release

GTT Communications, Inc. (NYSE: GTT), the leading global cloud networking provider to multinational clients, will attend and present at the following upcoming conferences:

• On May 30, GTT will attend Cowen and Company’s 47th Annual Technology, Media & Telecom Conference in New York. Management will present at 2:45 p.m. ET and meet with investors that day.
• On June 4, GTT will attend Credit Suisse’s 21st Annual Telecom, Media & Internet Conference in New York. Management will present at 11:30 a.m. ET and meet with investors that day.
• On June 6, GTT will attend William Blair’s 39th Annual Growth Conference in Chicago. Management will present at 2 p.m. CT and meet with investors that day.

Webcasts of presentation sessions and a copy of GTT’s latest investor presentation will be available on the company’s website.

About GTT
GTT connects people across organizations, around the world and to every application in the cloud. Our clients benefit from an outstanding service experience built on our core values of simplicity, speed and agility. GTT owns and operates a global Tier 1 internet network and provides a comprehensive suite of cloud networking services. For more information on GTT (NYSE: GTT), please visit www.gtt.net.

GTT Investor Relations:
Carolyn Capaccio/Jody Burfening, LHA
+1-212-838-3777
[email protected]

GTT Media Inquiries:
Marion Janic, RooneyPartners
+1-212-223-4017
[email protected]

Bob Cavosi, RooneyPartners
+1-646-638-9891
[email protected]