Exhibit 99.1

Disclosures Regarding OpenText and the EMC Enterprise Content Division

The following chart provides unaudited financial data for the last twelve months (“LTM”) ended September 30, 2016 for Open Text Corporation and its consolidated subsidiaries (“OpenText” or the “Company”).

The following chart provides unaudited financial measures, certain of which are not calculated in accordance with U.S. GAAP (“Non-GAAP”) for OpenText on an actual and a pro forma basis, giving effect to the pro forma transactions described in Exhibit 99.3 to our Current Report on Form 8-K, filed on December 12, 2016; provided, however that the pro forma numbers used to calculate the following Non-GAAP financial measures assume that the Anticipated Acquisition (as defined below) was financed through $564 million (instead of $500 million) raised through the Equity Offering (as defined therein) and $436 million (instead of $500 million) raised through the Debt Financing (as defined therein). The impact of the adjusted assumptions on the unaudited pro forma consolidated statement of income for the twelve months ended June 30, 2016 and the three months ended September 30, 2016, respectively, are as follows:

This disclosure provides reconciliations of these measures to the most directly comparable measure under U.S. GAAP. OpenText believes that EBITDA, Adjusted EBITDA, EBITDA Margin and Adjusted EBITDA Margin improve comparability from period to period by excluding the distorting effect of certain non-operational charges. The use of the term “non-operational charge” is defined for this purpose as an expense that does not impact the ongoing operating decisions taken by management. OpenText believes that EBITDA, Adjusted EBITDA, EBITDA Margin and Adjusted EBITDA Margin are measures widely used by securities analysts, investors and others to evaluate the financial performance of companies in OpenText’s and the EMC Enterprise Content Division’s industry. Other companies may calculate EBITDA, Adjusted EBITDA, EBITDA Margin and Adjusted EBITDA Margin differently, and, therefore, OpenText’s and the EMC Enterprise Content Division’s measures may not be comparable to similarly titled measures of other companies. EBITDA, Adjusted EBITDA, EBITDA Margin and Adjusted EBITDA Margin are not measures of financial performance or liquidity under U.S. GAAP and should not be considered in isolation or as an alternative to net income, cash flows from operating activities and other measures determined in accordance with U.S. GAAP. Items excluded from EBITDA and Adjusted EBITDA, as noted in the above and in the following table, are significant and necessary components of the operations of OpenText’s and the EMC Enterprise Content Division’s business. Given the foregoing limitations, EBITDA, Adjusted EBITDA, EBITDA Margin and Adjusted EBITDA Margin should only be used as supplemental measures of OpenText’s and the EMC Enterprise Content Division’s operating performance.

The following chart provides unaudited reconciliations of OpenText’s EBITDA and Adjusted EBITDA to net income attributable to OpenText for the following periods presented on an actual and pro forma basis:

As previously announced by OpenText on September 12, 2016, and reported on OpenText’s Current Report on Form 8-K, filed September 12, 2016, the Company entered into a Master Acquisition Agreement dated September 12, 2016, with EMC Corporation, a Massachusetts corporation, EMC International Company, a company organized under the laws of Ireland, and EMC (Benelux) B.V., a besloten vennootschap organized under the laws of Netherlands (collectively referred to as “Dell-EMC”), pursuant to which OpenText has agreed to acquire (the “Anticipated Acquisition”) certain assets and assume certain liabilities of the enterprise content division of Dell-EMC (the “EMC Enterprise Content Division”). The Anticipated Acquisition is expected to close within 90 to 120 days of the date of the Master Acquisition Agreement and is subject to customary regulatory approvals and closing conditions.

For the year ended December 31, 2015 the EMC Enterprise Content Division’s EBITDA and Adjusted EBITDA was approximately $167 million and $191 million, respectively, as compared to approximately $171 million and $185 million, respectively, for the year ended December 31, 2014. For the LTM period ending June 30, 2016, the EMC Enterprise Content Division’s EBITDA and Adjusted EBITDA was approximately $191 million and $200 million, respectively. See also the historical consolidated financial statements of the EMC Enterprise Content Division and related notes thereto included as Exhibit 99.1 and Exhibit 99.2 of OpenText’s Current Report on Form 8-K, filed December 12, 2016.

The following chart provides unaudited reconciliations of the EMC Enterprise Content Division’s EBITDA and Adjusted EBITDA to the EMC Enterprise Content Division’s net income for the following periods presented: