Investor Presentation December 2019 Disclaimer Forward-Looking - PowerPoint PPT Presentation

Investor Presentation December 2019

Disclaimer Forward-Looking Statements: This presentation contains forward-looking statements which are made pursuant to the safe harbor provisions of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The forward-looking statements in this presentation do not constitute guarantees of future performance. Investors are cautioned that statements in this presentation, which are not strictly historical statements, including, without limitation, statements by our Executives, and statements concerning our expected future performance, plans, objectives and strategies, constitute forward- looking statements. Such forward-looking statements are and will be subject to many risks, uncertainties and factors relating to our operations and the business environment that may cause our actual results to be materially different from any future results, express or implied, by such forward- looking statements. Factors that could cause GTT’s actual results to differ materially from these forward-looking statements include, but are not limited to, the following: the effects on our business and customers of general economic and financial market conditions; our ability to achieve the expected benefits of certain transactions; our ability to develop and market new products and services that meet customer demands and generate acceptable margins; our reliance on several large customers; our ability to negotiate and enter into acceptable contract terms with our suppliers; our ability to attract and retain qualified management and other personnel; competition in the industry in which we do business; failure of the third-party communications networks on which we depend; legislation or regulatory environments, requirements or changes adversely affecting the businesses in which we are engaged; our ability to maintain our databases, management systems and other intellectual property; our ability to prevent process and system failures or security breaches that significantly disrupt the availability and quality of the services that we provide; our ability to maintain adequate liquidity and produce sufficient cash flow to fund acquisitions and capital expenditures; our ability to meet all the terms and conditions of our debt obligations; our ability to obtain capital to grow our business; our ability to utilize our net operating losses; expectations regarding the trading price of our common stock; our ability to complete acquisitions or divestitures and effectively integrate any business or operation acquired; foreign exchange rate fluctuations; and fluctuations in our effective tax rate. Additional information concerning these and other important factors can be found under the heading “Risk Factors” in GTT’s annual and quarterly reports filed with the Securiti es and Exchange Commission including, but not limited to, its Annual Report on Form 10-K for the year ended December 31, 2018. Statements in this release should be evaluated in light of these important factors. We undertake no obligation to update any forward-looking information contained in this presentation. Additionally, this presentation may contain various non- GAAP financial measures as defined by the SEC’s Regulation G. More information on the non-GAAP financial measures used in this presentation can be found in the appendix. 2

GTT Overview GTT provides cloud networking services to large and multinational clients Expansive Comprehensive Cloud Global Reach Networking Services Tier 1 global network reaching any location in Wide Area Networking, Internet, Transport & the world and every application in the cloud Infrastructure, Unified Communications and other Managed Services Outstanding Strong Client Experience Growth Profile LQA Revenue: $1.7B (46% 5-year CAGR) Differentiated service built on our core values of simplicity, speed and agility LQA Adj. EBITDA: $410M (52% 5-year CAGR) 3

Extensive Global Network 600+ 140+ Tier 1 200,000+ 3,500+ Points of Presence Countries with Internet backbone Client Regional partners (PoPs) on six client services top-ranked in the devices under for redundant, continents industry 1 management secure last mile access 4 1 Source: CAIDA 2019

Any Location. Every Application. Unified Security Communication Public Private Connection Connection Tier 1 Global IP Network Wide Area Internet SD-WAN Networking EoC or DSL Coaxial 3G/4G Wireless GTT GTT GTT GTT Fiber PoP PoP PoP PoP Client Client Client Client Headquarters/ Branch Office Branch Office Branch Office Data Center Complete network and device management Core Network Connectivity Redundant, Secure Last Mile Access • Points of Presence (PoPs) in most major carrier • Leased fiber, copper, coaxial, wireless connections neutral data centers worldwide • Application performance optimized through multiple last • PoPs are connected via a combination of owned mile access lines shared in an SD-WAN environment fiber and leased routes 5

GTT Connects People Across Organizations Around the World and to Every Application in the Cloud Key Trends Driving Demand Growth Growth in Use of Increase in Enterprise Increase in Traffic Public Internet Bandwidth to the Cloud • Increase in broadband • Machine to machine • 500M new native cloud • Increasing file size access speeds and apps projected between • 35% of all production subscribers 2017 and 2022. • IoT apps – 29B connected • Increase in Video apps will be cloud native • Online gaming devices projected by 2022 by 2022 • Mobility – 71% of total IP • Enterprise bandwidth • Cloud IP traffic traffic by 2022 increasing 30%-40% per increasing 30% CAGR annum Accelerating Demand for More Cloud Networking Services 6 Source: IDC, Gartner, Cisco VNI, Telegeography estimates

Diversified Revenue Mix Customer Type Service Offering Geography 27% 40% 60% 73% Enterprise US Carrier Non-US 7 Note: Data based on 3Q19 recurring revenue, geography based on service location. “Other Managed Services” includes profession al services and managed hosting

Growth Strategy Balanced approach of rep-driven growth and accretive acquisitions Drivers Differentiators • ‘Capex Light’ model allows for global • Rep-Driven last mile reach to any location in the • Grow sales force across all world markets and channels • • Our global Tier 1 IP backbone provides Up-sell and cross-sell to grow seamless connection to any application wallet share • in the cloud Lower churn via superior client service and proactive renewals • Internally developed software platform • (CMD) handles all aspects of client Acquisitions lifecycle and profitability • Small (more frequent) • • Focused on cloud networking with Large (less frequent) service experience built on our core values of simplicity, speed and agility 2020 Free Cash Flow Target of $175 – $200M 8

Transformation Through Strategic M&A Annualized Revenue Expands ($ in millions) European market presence 1,400 2,000 Adds scale & low- cost last-mile access 1,200 Adds strategic clients and transatlantic 1,000 1,000 network Adds enterprise- grade voice services Adds managed 800 800 Completes network transformation to services Tier 1 IP network 600 Proven Approach 600 • Strong strategic fit – Expand services/reach – Add clients / talent 400 400 • Rapid integration of organization, systems and networks 200 200 • Highly accretive based on multiple of post-synergy EBITDA - 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 9

Financial Highlights ($ in Millions) Revenue Adjusted EBITDA $550.0 $1,680 90.0% % of Revenue $450.0 $1,491 70.0% $409 $350.0 $363 50.0% $250.0 $828 $222 24% 24% 30.0% 24% 21% $150.0 $527 27% $125 $372 10.0% $50.0 $77 2015 2016 2017 2018 3Q19 2015 2016 2017 2018 3Q19 -10.0% $(50.0) Annualized Annualized Capex Adjusted Free Cash Flow 270 $254 Adjusted Free Cash Flow $233 Adjusted Unlevered Free Cash Flow 220 $115.0 45.0% $95.0 $104 170 35.0% % of Revenue $75.0 25.0% $78 $104 120 15.0% $55.0 5% 6% 4% 5% 5% $72 5.0% 70 $35.0 $38 $42 -5.0% $76 $74 $15.0 $56 $24 $46 20 -15.0% $14 $25 $(5.0) -25.0% 2015 2016 2017 2018 3Q19 2015 2016 2017 2018 3Q19 TTM -30 Annualized -35.0% $(25.0) 10 Note: Results are as reported, not including pro forma cost synergies or constant currency adjustments, and only including acquisitions after their respective close dates; see appendix for non-GAAP definitions and reconciliations

Liquidity & Debt ($ in Millions) Credit Metrics Cash $ 41 Available Revolver 154 3Q19 Total Liquidity 195 USD Term Loan 1,748 EUR Term Loan 807 7.875% Sr. Unsecured Notes 575 Other Secured Debt (1) 133 3Q19 Total Debt $ 3,263 Debt Maturity Profile 2,452 603 112 31 28 27 10 2019 2020 2021 2022 2023 2024 2025 & Beyond Term Loans 7.875% Sr. Unsecured Notes 500 Other Secured Debt (1) 11 Note: 3Q19 pro forma net leverage is ~6.6x, on a trailing twelve month basis, including acquisitions and unrealized cost synergies in prior periods (1) Includes Drawn Revolver of $85M, Vendor Loans of $7M and Capital Leases of $41M