GTT Reports Fourth Quarter and Full Year 2016 Financial Results

ANNEX A: Non-GAAP Financial Information

In addition to financial measures prepared in accordance with accounting principles generally accepted in the United States (“GAAP”), from time to time we may use or publicly disclose certain “non-GAAP financial measures” in the course of our financial presentations, earnings releases, earnings conference calls and otherwise. For these purposes, the U.S. Securities and Exchange Commission (“SEC”) defines a “non-GAAP financial measure” as a numerical measure of historical or future financial performance, financial positions or cash flows that (i) excludes amounts, or is subject to adjustments that effectively exclude amounts, included in the most directly comparable measure calculated and presented in accordance with GAAP in financial statements, and (ii) includes amounts, or is subject to adjustments that effectively include amounts, that are excluded from the most directly comparable measure so calculated and presented.

Non-GAAP financial measures are provided as additional information to investors to provide an alternative method for assessing our financial condition and operating results. We believe that these non-GAAP measures, when taken together with our GAAP financial measures, allow us and our investors to better evaluate our performance and profitability. These measures are not in accordance with, or a substitute for GAAP and may be different from or inconsistent with non-GAAP financial measures used by other companies. These measures should be used in addition to and in conjunction with results presented in accordance with GAAP and should not be relied upon to the exclusion of GAAP financial measures.

Pursuant to the requirements of Regulation G, whenever we refer to a non-GAAP financial measure, we will also generally present the most directly comparable financial measure calculated and presented in accordance with GAAP, along with a reconciliation of the differences between the non-GAAP financial measure we reference and such comparable GAAP financial measure.

Adjusted Earnings Before Interest, Taxes, Depreciation and Amortization (“Adjusted EBITDA”)

Adjusted EBITDA is defined as net income/(loss) before interest, income taxes, depreciation and amortization (“EBITDA”) adjusted to exclude severance, restructuring and other exit costs, acquisition-related transaction and integration costs, losses on extinguishment of debt, stock-based compensation and, from time to time, other non-cash or non-recurring items.

We use Adjusted EBITDA to evaluate operating performance, and this financial measure is among the primary measures we use for planning and forecasting future periods. We further believe that the presentation of Adjusted EBITDA is relevant and useful for investors because it allows investors to view results in a manner similar to the method used by management and makes it easier to compare our results with the results of other companies that have different financing and capital structures. In addition, we have debt covenants that are based on a leverage ratio that utilizes a modified EBITDA calculation, as defined in our Credit Agreement. The modified EBITDA calculation is similar to our definition of Adjusted EBITDA; however, it includes the pro forma Adjusted EBITDA of and expected cost synergies from the companies acquired by us during the applicable reporting period. Finally, Adjusted EBITDA results, along with other quantitative and qualitative information, are utilized by management and our compensation committee for purposes of determining bonus payouts to our employees.

Adjusted EBITDA Less Capital Expenditures

Adjusted EBITDA less purchases of property and equipment, which we also refer to as capital expenditures, is a performance measure that is used to evaluate the appropriate level of capital expenditures needed to support our expected revenue and to provide a comparable view of our performance relative to other telecommunications companies that may utilize different strategies for providing access to fiber-based services and related infrastructure. We use a “capex light” strategy, which means we purchase fiber-based services and related infrastructure from other providers on an as-needed basis, pursuant to our customers’ requirements. Many other telecommunications companies spend significant amounts of capital expenditures to construct their own fiber networks and data centers, and attempt to purchase as little as possible from other providers. As a result of our strategy, we typically have lower Adjusted EBITDA margins compared to other providers but also spend much less on capital expenditures relative to our revenue. We believe it is important to take both of these factors into account when evaluating our performance.

The following is a reconciliation of Adjusted EBITDA and Adjusted EBITDA less capital expenditures from Net (Loss) Income (amounts in millions):

Constant Currency

We evaluate our results of operations both as reported and on a constant currency basis. The constant currency presentation, which is a non-GAAP measure, excludes the impact of fluctuations in foreign currency exchange rates. We believe providing constant currency information offers valuable supplemental information regarding our results of operations, consistent with how we evaluate our performance. We calculate constant currency results by converting our current-period local currency financial results using prior-period exchange rates and comparing these adjusted amounts to our prior-period reported results.

Pro Forma Financial Information

In addition to financial measures prepared in accordance with GAAP, from time to time we may use or publicly disclose certain “pro forma” financial measures in the course of our financial presentations, earnings releases, earnings conference calls and otherwise. We believe certain pro forma financial measures provide a more comparable view of our results relative to prior periods, particularly given the number of acquisitions we have completed in the past.

The following unaudited pro forma financial information and related notes present the historical information of GTT as if the acquisitions of Hibernia Networks (“Hibernia”), One Source Networks, Inc. (“OSN”), and MegaPath Corporation (“MegaPath”) had occurred on the first day of the period presented, if applicable.

For the three months ended December 31, 2016, compared with the three months ended December 31, 2015, the following unaudited financial information presents historical GTT information as if the acquisition of OSN had occurred on the first day of the period presented, as reported and in constant currency:

For the three months ended December 31, 2016 compared with September 30, 2016, the following unaudited financial information presents historical GTT information, as reported and in constant currency:

For the year ended December 31, 2016, compared with December 31, 2015, the following unaudited financial information presents historical GTT information as if the acquisitions of OSN and MegaPath had occurred on the first day of the period presented, as reported and in constant currency:

For the three months ended December 31, 2016, compared with the three months ended December 31, 2015, the following unaudited financial information presents historical GTT information as if the acquisitions of Hibernia and OSN had occurred on the first day of the period presented, as reported and in constant currency:

For the three months ended December 31, 2016 compared with September 30, 2016, the following unaudited financial information presents historical GTT information as if the acquisition of Hibernia had occurred on the first day of the period presented, as reported and in constant currency:

For the year ended December 31, 2016, compared with December 31, 2015, the following unaudited financial information presents historical GTT information as if the acquisitions of Hibernia, OSN and MegaPath had occurred on the first day of the period presented, as reported and in constant currency: