[1] Mercator Partners, a special purpose acquisition company bought Global Internetworking Inc. in April 2005 and European Telecommunications & Technology in 2006.

[4] It then acquired PacketExchange, a privately held UK company and operator of a global IP backbone, in June 2011 for $20 million in cash.

[10] In October 2014, GTT announced it had closed the acquisition of UNSi, a communications company providing data services to large enterprise and carrier clients.

[12] On October 22, 2015, GTT acquired One Source Networks (OSN), a provider of data, Internet, Session Initiation Protocol (SIP) trunking and managed services.

[18] On June 19, GTT announced it was acquiring Perseus Telecom, a provider of low latency services for the financial market industry, for $37.5 million.

[25] On October 1, GTT acquired Cary, NC-based Access Point, a provider of communications services in the US market.

The division consists of a pan-European, North American, and subsea fiber network and data center assets and associated infrastructure services provided to customers which were acquired by GTT through the Hibernia, Interoute and KPN International acquisitions.

[28] On August 2, 2021, The New York Stock Exchange delisted GTT Communications' shares after it failed to file its quarterly and annual results.