Exhibit 99.1

TIBCO SOFTWARE GROWS LICENSE REVENUE BY 23% AND

TOTAL REVENUE BY 21% OVER Q2 2009

Non-GAAP EPS Increases to $0.15

PALO ALTO, Calif., June 24, 2010 – TIBCO Software Inc. (Nasdaq: TIBX) today announced results for its second quarter, which ended on May 30, 2010.

Total revenue for the second quarter of fiscal 2010 was $173.3 million and net income was $12.8 million, or $0.08 per diluted share. This compares to total revenue of $142.7 million and net income of $10.1 million, or $0.06 per diluted share, as reported for the second quarter of fiscal 2009.

On a non-GAAP basis, net income for the second quarter of fiscal 2010 was $26.2 million or $0.15 per diluted share, compared with $19.0 million or $0.11 per diluted share for the second quarter of fiscal 2009. Non-GAAP operating income for the second quarter of fiscal 2010 was $38.8 million, an increase of 43% over non-GAAP operating income of $27.1 million in Q2 2009. This implies an expansion of non-GAAP operating margins of 340 basis points, from 19.0% in Q2 2009 to 22.4% in Q2 2010. Non-GAAP results exclude stock-based compensation expense, amortization of acquired intangible assets, restructuring expenses, and acquisition related and other expenses and assume non-GAAP effective tax rates of 31% and 32% for the second fiscal quarters of 2010 and 2009, respectively.

“Our business continued its strong momentum in Q2, delivering accelerated growth in license revenue, total revenue, and operating profits,” said Vivek Ranadivé, TIBCO’s chairman and chief executive officer. “Our core SOA business grew 34% over last year, our BPM business delivered a major new product release, and our Business Optimization technologies continue to drive deals for us. Customers from all industries are embracing our event-driven and in-memory products to help achieve their Two-Second Advantage^TM, and we have the products, solutions and expertise to help them get there.”

Second Quarter Fiscal 2010 Highlights

Conference Call Details

TIBCO has scheduled a conference call for 4:30 pm ET / 1:30 pm PT today to discuss its second 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) 758-2055. Please join the conference call at least 10 minutes early to register. A replay of the conference call will be available until midnight on July 24, 2010 at www.tibco.com or via dial-in at (800) 642-1687 or (706) 645-9291. The pass code for both the call and the replay is 78422894.

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About TIBCO

TIBCO’s technology digitized Wall Street in the ’80s with event-driven “Information Bus” software, which helped make real-time business a strategic differentiator in the ’90s. Today, TIBCO’s infrastructure software gives customers the ability to constantly innovate by connecting applications and data in a service-oriented architecture, streamlining activities through business process management, and giving people the information and intelligence tools they need to make faster and smarter decisions, what we call The Power of Now®. TIBCO serves more than 3,000 customers around the world with offices in more than 20 countries and an ecosystem of over 200 partners. Learn more at www.tibco.com.

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TIBCO, The Power of Now and TIBCO Software are trademarks or registered trademarks of TIBCO Software Inc. in the United States and/or other countries. All 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.

About 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 in the United States of America (“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 second quarter of fiscal year 2010 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 statements regarding our Business Optimization technologies continuing to drive deals, the continued ability of our products to help customers achieve their Two-Second Advantage, and our ability to provide goods and expertise to help our customers achieve their Two-Second Advantage 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: our ability to differentiate our solutions from those of our competitors, our ability to compete effectively against alternative business models, and our ability to execute successfully on our product plans. 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, 2009 and Quarterly Report on Form 10-Q for the quarter ended February 28, 2010. TIBCO assumes no obligation to update the forward-looking statements included in this release.

TIBCO Software Inc.

Condensed Consolidated Balance Sheets

(unaudited)

(in thousands)

TIBCO Software Inc.

Condensed Consolidated Statements of Operations

(unaudited)

(in thousands, except net income per share)

TIBCO Software Inc.

Condensed Consolidated Statements of Cash Flows

(unaudited)

(in thousands)

About Non-GAAP Financial Measures

TIBCO provides non-GAAP measures for operating income, net income and net income per share data as supplemental information regarding TIBCO’s business performance. TIBCO believes that these non-GAAP financial measures are useful to investors because they exclude non-operating charges. 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 stock-based compensation related to employee stock options, amortization of acquired intangible assets, costs related to formal restructuring activities, acquisition-related and other expenses, gains and losses on equity investments, and the income tax effects of the foregoing, as well as adjustments for the impact of changes in the valuation allowance recorded against TIBCO’s deferred tax assets when making operational decisions.

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 that used by TIBCO’s management.

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 and/or analysts. However, TIBCO’s management compensates for these limitations by providing the relevant disclosure of the items excluded in the calculation of non-GAAP operating income, non-GAAP net income and non-GAAP net income per share. In addition, some items such as restructuring charges that are excluded from non-GAAP net income and non-GAAP earnings per share can have a material impact on cash flows and stock compensation charges can have a significant impact on earnings. Management compensates for these limitations by evaluating the non-GAAP measure together with the most directly comparable GAAP measure. TIBCO has historically provided non-GAAP measures to the investment community as a supplement to its GAAP results, to enable investors to evaluate TIBCO’s business performance in the way that management does.

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

Amortization of Intangible Assets

TIBCO has incurred amortization of intangible assets, included in its GAAP financial statements, related to various acquisitions TIBCO has made. 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 believes that eliminating this expense from its non-GAAP measures is useful to investors, because 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 TIBCO believes is not reflective of its business performance. The nature of the stock-based compensation expense also makes it very difficult to estimate prospectively, since the expense will vary with changes in the stock price and market conditions at the time of new grants, varying valuation methodologies, subjective assumptions and different award types, making the comparison of current results with forward-looking guidance potentially difficult for investors to interpret. The tax effects of stock-based compensation expenses may also vary significantly from period to period, without any change in underlying operational performance, thereby obscuring the underlying profitability of operations relative to prior periods. 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 has incurred 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 believes that eliminating these expenses from its non-GAAP measures is useful to investors, because it 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.

Restructuring Activities

TIBCO has incurred 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)