Exhibit 99.1

TIBCO SOFTWARE REPORTS THIRD QUARTER RESULTS

PALO ALTO, Calif., September 18, 2014 - TIBCO Software Inc. (NASDAQ: TIBX) today announced results for its fiscal third quarter, which ended on August 31, 2014.

On a GAAP basis, total revenue for the third quarter of fiscal 2014 was $255.6 million, compared with $270.9 million for the third quarter of fiscal year 2013, and software revenue was $85.9 million, compared with $108.0 million. Within software revenue, license revenue was $76.7 million, compared with $105.1 million, while subscription revenue was $9.2 million, compared with $2.9 million. Net income was $2.6 million, or $0.02 per diluted share, compared to $21.3 million, or $0.13 per diluted share, in the third quarter of fiscal 2013.

On a non-GAAP basis, total revenue for the third quarter of fiscal 2014 was $259.6 million, compared with $270.9 million for the third quarter of fiscal year 2013, and software revenue was $89.9 million, compared with $108.0 million. Non-GAAP subscription revenue within software revenue more than quadrupled to $13.2 million from last year and includes $4.0 million for the acquisition-related accounting effects on deferred revenue. Non-GAAP operating income for the third quarter of fiscal 2014 was $40.7 million, resulting in a non-GAAP operating margin of 15.7% compared to $64.2 million, or a margin of 23.7% in the third quarter of fiscal 2013. Non-GAAP net income was $23.3 million or $0.14 per diluted share, compared with $46.3 million or $0.28 per diluted share for the third quarter of fiscal 2013, which assumes non-GAAP effective tax rates of 36% and 23% for the third quarters of fiscal 2014 and 2013, respectively. Non-GAAP results exclude acquisition-related accounting effects on deferred revenue, amortization of acquired intangible assets, stock-based compensation expense, acquisition and other related expenses, restructuring activities, and non-cash interest expense related to convertible debt, net of tax effects.

“This quarter, we accelerated a number of strategic and operational changes that resulted in strong growth of subscription sales and a solid sequential improvement in our Spotfire business,” said Vivek Ranadivé, TIBCO’s chairman and chief executive officer. “The migration of perpetual to subscription-based licensing, together with less-than-expected revenue in Europe, had an impact on our overall software revenue results this quarter. We continue to believe, however, that reaching a broader base of customers through subscription pricing and building a solid base of recurring revenue is the right long-term strategy for TIBCO.”

Third Quarter Fiscal 2014 Highlights

Conference Call Details

TIBCO has scheduled a conference call for 4:30 pm ET / 1:30 pm PT today to discuss its third quarter results. The conference call will be hosted by InterCall and may be accessed over the internet at www.tibco.com or via dial-in at 877-293-9114 or 706-679-0841. Please join the conference call at least 10 minutes early to register. A replay of the conference call will be available until midnight ET on October 18, 2014 at www.tibco.com or via dial-in at 855-859-3406 or 404-537-3406. The passcode for both the call and the replay is 96108737.

About TIBCO

TIBCO Software Inc. (NASDAQ: TIBX) is a global leader in infrastructure and business intelligence software. Whether it’s optimizing inventory, cross-selling products, or averting crisis before it happens, TIBCO uniquely delivers the Two-Second Advantage^® – the ability to capture the right information at the right time and act on it preemptively for a competitive advantage. With a broad mix of innovative products and services, TIBCO is the strategic technology partner trusted by businesses around the world. Learn more about TIBCO at www.tibco.com.

TIBCO, TIBCO Software, ActiveMatrix BusinessWorks, Jaspersoft, Spotfire, StreamBase, TIBCO Engage and Two-Second Advantage are trademarks or registered trademarks of TIBCO Software Inc. or its subsidiaries in the United States and/or other countries. Other product and company names and marks mentioned in this document are the property of their respective owners and are mentioned for identification purposes only.

Use of Non-GAAP Financial Information

This press release includes non-GAAP financial measures. For a description of these non-GAAP financial measures, including the reasons management uses each measure, and reconciliations of these non-GAAP financial measures to the most directly comparable financial measures prepared in accordance with Generally Accepted Accounting Principles (GAAP), please see the section entitled “About Non-GAAP Financial Measures” and the accompanying table entitled “Reconciliation of GAAP to Non-GAAP Measures.”

Legal Notice Regarding Forward-Looking Statements

This release contains forward-looking statements within the meaning of the “safe harbor” provisions of the federal securities laws. The final financial results for the third quarter of fiscal year 2014 may differ materially from the preliminary results presented in this release due to factors that include, but are not limited to, risks associated with the final review of the results and preparation of financial statements. In addition, forward-looking statements such as whether the migration to subscription-based licensing will help us reach a broader base of customers and build a solid base of recurring revenue and whether we will be able to harness the opportunities within customer experience management through TIBCO Engage are subject to risks and uncertainties that could cause actual results to differ materially from such forward-looking statements. These risks include but are not limited to: risks arising from adverse changes and uncertainty in domestic and global economies, TIBCO’s ability to achieve improved performance and accelerate growth from its investments for growth and innovation, the impact of competition from alternative business models and new product introductions, TIBCO’s ability to offer compelling, differentiated products, and the impact of competition from companies that are larger or have greater resources than TIBCO. Additional information regarding potential risks is provided in TIBCO’s filings with the SEC, including its most recent Annual Report on Form 10-K for the year ended November 30, 2013 and Quarterly Report on Form 10-Q for the quarter ended June 1, 2014. TIBCO assumes no obligation to update the forward-looking statements included in this release.

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Condensed Consolidated Statements of Operations

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About Non-GAAP Financial Information

TIBCO provides non-GAAP measures for revenue, operating income, net income and net income per share data as supplemental information regarding TIBCO’s business performance. TIBCO believes that providing the non-GAAP measures that management uses to its investors is useful to investors for a number of reasons. The non-GAAP measures provide a consistent basis for investors to understand TIBCO’s financial performance on a trended basis across historical periods. In addition, it allows investors to evaluate TIBCO’s performance using the same methodology and information as used by TIBCO’s management. TIBCO’s management excludes these non-operating charges when it internally evaluates the performance of TIBCO’s business and makes operating decisions, including internal budgeting, performance measurement and the calculation of bonuses and discretionary compensation, because these measures provide a consistent method of comparison to historical periods. Moreover, management believes these non-GAAP measures reflect the essential revenue generation activities of TIBCO. Accordingly, management excludes from revenue the acquisition-related accounting adjustment to deferred revenue assumed in business combinations and excludes stock-based compensation related to employee stock options, amortization of acquired intangible assets, costs related to formal restructuring activities, acquisition-related and other expenses, non-cash interest expense related to convertible debt, as well as the income tax effects of the foregoing.

Non-GAAP measures are subject to material limitations as these measures are not in accordance with, or a substitute for GAAP and thus TIBCO’s definition may be different from similar non-GAAP measures used by other companies or analysts. Management compensates for these limitations by evaluating the non-GAAP measure together with the most directly comparable GAAP measure.

The non-GAAP adjustments, and the basis for excluding them, are outlined below:

Acquisition-related Revenue Adjustment

Business combination accounting rules require TIBCO to reduce the deferred revenue assumed in a business combination to the fair value of the future obligations from subscription and maintenance contracts assumed. As such, GAAP revenue subsequent to an acquisition of a business does not reflect the full amount of revenue of these assumed subscription and maintenance contracts that would have otherwise been recorded had the acquisition not occurred. This non-GAAP adjustment is intended to include, and thus reflect, the full amount of such revenue. Management includes this item for the purposes of calculating non-GAAP revenue, non-GAAP operating income, non-GAAP net income and non-GAAP net income per share. TIBCO’s management believes this adjustment to revenue is useful to investors as a measure of ongoing performance of its business because, although it does not control if customers renew their subscription or maintenance contracts, TIBCO has historically experienced high renewal rates on subscription and maintenance contracts.

Amortization of Intangible Assets

TIBCO incurs amortization expense from intangible assets related to prior acquisitions. Management excludes these items for the purposes of calculating non-GAAP operating income, non-GAAP net income and non-GAAP net income per share. The amortization of intangible assets can be inconsistent in amount and frequency and is significantly impacted by the timing and magnitude of TIBCO’s acquisition transactions, which also vary substantially in frequency from period to period.

Stock-based Compensation

TIBCO incurs stock-based compensation expense. TIBCO excludes this item for the purposes of calculating non-GAAP operating income, non-GAAP net income and non-GAAP net income per share because it is a non-cash expense that can be inconsistent in amount from period to period. The stock-based compensation expense can be significantly impacted by the type of compensation instrument, the vesting conditions and judgment used to assess if these conditions will be met in the future. Finally, TIBCO believes that non-GAAP measures of profitability that exclude stock-based compensation are widely used by analysts and investors in the software industry.

Acquisition-related and Other Expenses

TIBCO incurs acquisition-related and other expenses which consist of costs incurred after the issuance of a definitive term sheet for a particular transaction (whether or not such transaction is ultimately completed, remains in process or is not completed) and include legal, banker, accounting and other advisory fees of third parties and severance costs for employees of the acquired company that are terminated within 90 days of the acquisition date. Management excludes these items for the purposes of calculating non-GAAP operating income, non-GAAP net income and non-GAAP net income per share. TIBCO generally would not have otherwise incurred such expenses in the periods presented as part of its continuing operations. The acquisition-related and other expenses are not recurring with respect to past transactions, can be inconsistent in amount and frequency from period to period and are significantly impacted by the timing and magnitude of TIBCO’s acquisitions. While these expenses are not recurring with respect to past transactions, TIBCO generally will incur these expenses in connection with any future acquisitions.

Non-Cash Interest Expense Related to Convertible Debt

TIBCO is required to recognize non-cash interest expense related to its 2.25% convertible senior notes issued in April 2012 as an imputed interest expense. Management excludes this incremental non-cash interest expense for purposes of calculating non-GAAP net income and non-GAAP net income per share. Under the relevant accounting guidance, TIBCO is required to separate the conversion option as an equity component from the debt and account for the debt in a manner that reflects TIBCO’s non-convertible debt borrowing rate. This results in the debt component of the convertible notes being treated as though it was issued at a discount, with the debt discount being accreted as additional non-cash interest expense over the term of the notes using the effective interest method. TIBCO excludes this expense from its non-GAAP measures because this incremental interest expense does not represent a cash outflow for the company and is not meaningful in evaluating current versus past business results. Finally, TIBCO believes that non-GAAP measures of profitability that exclude non-cash interest accretion expense are widely used by analysts and investors.

Restructuring Activities

TIBCO incurs restructuring expenses, included in its GAAP presentation of operating expense, primarily due to workforce related charges such as payments for severance and benefits and estimated costs of exiting and terminating facility lease commitments related to a formal restructuring plan. TIBCO excludes these items for the purposes of calculating non-GAAP operating income, non-GAAP net income and non-GAAP net income per share, when it evaluates the continuing business performance of TIBCO. TIBCO believes that these items are not consistently recurring and do not necessarily reflect expected future operating expense, nor does TIBCO believe that they provide a meaningful evaluation of current versus past business results or the expense levels required to support TIBCO’s operating plan.

TIBCO Software Inc.

Reconciliation of GAAP to Non-GAAP Measures

(unaudited)

(in thousands, except net income per share)