Exhibit 99.1

Media Relations Contact:	Investor Relations Contact:
Phillip Tree	Matthew Langdon
TIBCO Software Inc.	TIBCO Software Inc.
(650) 846-8529	(650) 846-5747
ptree@tibco.com	mlangdon@tibco.com

TIBCO SOFTWARE DELIVERS RECORD PROFITS IN Q4

Company Also Reports Record Levels of Revenue and Operating Cash Flow for Fiscal 2008

PALO ALTO, Calif., December 22, 2008 – TIBCO Software Inc. (Nasdaq: TIBX) today announced results for its fourth quarter, which ended on November 30, 2008.

Total revenue for the fourth quarter of fiscal 2008 was $185.5 million and net income was $32.3 million, or $0.18 per diluted share. This compares to total revenue of $186.1 million and net income of $27.6 million, or $0.14 per diluted share, as reported for the fourth quarter of fiscal 2007.

On a non-GAAP basis, net income for the fourth quarter of fiscal 2008 was $39.9 million or $0.23 per diluted share, compared with $34.2 million or $0.18 per diluted share for the fourth quarter of fiscal 2007. Non-GAAP operating income for the fourth quarter of fiscal 2008 was $54.0 million, resulting in non-GAAP operating margins of 29%. This compares to non-GAAP operating income of $50.2 million, or 27% non-GAAP operating margins in the fourth quarter of fiscal 2007. Non-GAAP results exclude stock-based compensation expense, amortization of acquired intangible assets, restructuring charges and gains on sales of certain equity investments, and assume a non-GAAP effective tax rate of 30% for fiscal 2008 and 35% for fiscal 2007.

“In spite of a difficult environment, we delivered record operating profits and earnings per share this quarter,” said Vivek Ranadivé, TIBCO’s chairman and chief executive officer. “As we turn to 2009, I expect a continuing shift away from database oriented solutions to event-based solutions built on ‘in-memory’ data management systems, as businesses look to more proactively service and acquire customers. TIBCO, with its event-driven infrastructure platform, is well positioned to benefit from this trend.”

Fourth Quarter Fiscal 2008 Highlights

• Total revenue was $185.5 million;

• License revenue was $90.4 million;

• Repurchased 6.9 million shares;

• Strong mix of business across major industries including Financial Services, Telecommunications, Energy, Life Sciences and Government;

• TIBCO closed 135 deals over $100k and had 20 deals over $1 million;

• TIBCO expanded its business with leading companies in Q4 such as BNP Paribas, CIBC World Markets, CareFirst BlueCross BlueShield, Grupo Santander, Harvard Pilgrim Healthcare, Merck, Microsoft, Northrop Grumman, Scripps Networks, Swisscom, UNUM and Vodafone Group.

Full Year Fiscal 2008 Highlights

• Record total revenue of $644.5 million, an increase of 12% over fiscal 2007;

• Record cash flow from operations of $152.5 million, an increase of 49% over fiscal 2007;

• Record non-GAAP EPS of $0.47, vs. $0.38 for fiscal 2007; and

• Repurchased over 21 million shares.

Conference Call Details

TIBCO has scheduled a conference call for 4:30 pm ET / 1:30 pm PT today to discuss its fourth quarter results. The conference call will be hosted by Thomson Financial and may be accessed over the Internet at www.tibco.com or via dial-in at (877) 856-1956 or (719) 325-4756. Please join the conference call at least 10 minutes early to register. A replay of the conference call will be available until midnight on January 22, 2009 at www.tibco.com or via dial-in at (888) 203-1112 or (719) 457-0820. The pass code for both the call and the replay is 4604945.

###

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.

###

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 (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 fourth quarter of fiscal year 2008 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 the anticipated shift to event-based solutions built on ‘in-memory’ data management systems and away from old database technologies and TIBCO’s ability to benefit from that shift 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 adapt to new technologies and evolving industry trends; and competitive factors, including but not limited to competition from alternative business models, industry consolidation and new product introductions. 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, 2007 and Quarterly Report on Form 10-Q for the quarter ended August 30, 2008. TIBCO assumes no obligation to update the forward-looking statements included in this release.

TIBCO Software Inc.

Condensed Consolidated Balance Sheets

(unaudited)

(in thousands)

	November 30,
	2008		2007
ASSETS
Current assets:
Cash and cash equivalents	$	254,400	$	170,237
Short-term investments		13,073		95,534
Accounts receivable, net		133,191		161,730
Prepaid expenses and other current assets		46,495		53,540
Total current assets		447,159		481,041
Property and equipment, net		103,531		111,390
Goodwill		343,942		412,256
Acquired intangible assets, net		80,437		110,930
Long-term deferred income tax assets		73,634		35,307
Other assets		39,865		47,535
Total assets	$	1,088,568	$	1,198,459
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	15,030	$	12,076
Accrued liabilities		91,397		95,526
Accrued excess facilities costs		6,572		5,421
Deferred revenue		140,221		127,200
Current portion of long-term debt		2,033		1,924
Total current liabilities		255,253		242,147
Accrued excess facilities costs, less current portion		5,594		10,811
Long-term deferred revenue		12,007		14,319
Long-term deferred income tax liabilities		14,912		25,821
Long-term income tax liabilities		12,439		—
Long-term debt, less current portion		42,525		44,558
Other long-term liabilities		3,837		5,006
Total long-term liabilities		91,314		100,515
Total liabilities		346,567		342,662
Minority interest		358		401
Total stockholders’ equity		741,643		855,396
Total liabilities and stockholders’ equity	$	1,088,568	$	1,198,459

TIBCO Software Inc.

Condensed Consolidated Statements of Operations

(unaudited)

(in thousands, except net income per share)

	Three Months Ended						Year Ended
	November 30, 2008			November 30, 2007			November 30, 2008			November 30, 2007
Revenue:
License revenue	$	90,424		$	99,609		$	273,415		$	259,313
Service and maintenance revenue:
Service and maintenance		92,716			84,211			361,880			310,444
Reimbursable expenses		2,384			2,281			9,176			7,629
Total service and maintenance revenue		95,100			86,492			371,056			318,073
Total revenue		185,524			186,101			644,471			577,386
Cost of revenue:
License		8,319			8,591			30,276			24,024
Service and maintenance		35,681			37,522			147,622			134,877
Total cost of revenue		44,000			46,113			177,898			158,901
Gross profit		141,524			139,988			466,573			418,485
Operating expenses:
Research and development		25,888			26,069			106,594			92,924
Sales and marketing		58,116			59,260			224,641			197,397
General and administrative		12,789			13,009			53,046			51,538
Restructuring adjustment		—			—			—			(1,095	)
Amortization of acquired intangible assets		4,026			4,164			16,557			13,164
Acquired in-process research and development		—			—			—			1,600
Total operating expenses		100,819			102,502			400,838			355,528
Income from operations		40,705			37,486			65,735			62,957
Interest income		1,688			3,499			9,115			18,447
Interest expense		(710	)		(1,170	)		(3,238	)		(2,824	)
Other income (expense), net		(495	)		56			(782	)		(1,181	)
Income before provision for income taxes and minority interest		41,188			39,871			70,830			77,399
Provision for income taxes		8,923			12,186			18,314			25,401
Minority interest, net of tax		(26	)		40			105			110
Net income	$	32,291		$	27,645		$	52,411		$	51,888
Net income per share:
Basic	$	0.18		$	0.15		$	0.29		$	0.26
Diluted	$	0.18		$	0.14		$	0.29		$	0.25
Shares used to compute net income per share:
Basic		174,612			188,748			180,525			198,885
Diluted		175,758			192,940			183,742			205,316

TIBCO Software Inc.

Condensed Consolidated Statements of Cash Flows

(unaudited)

(in thousands)

	Year Ended
	November 30, 2008			November 30, 2007
Cash flows from operating activities:
Net income	$	52,411		$	51,888
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment		15,814			16,167
Amortization of acquired intangible assets		32,302			23,490
Stock-based compensation		20,972			17,563
Acquired in-process research and development		—			1,600
Deferred income tax		(26,667	)		(6,077	)
Tax benefits related to stock benefit plans		27,025			19,456
Excess tax benefits from stock-based compensation		(24,713	)		(17,980	)
Minority interest, net of tax		105			110
Other non-cash adjustments, net		991			(1,506	)
Changes in assets and liabilities:
Accounts receivable		20,683			(5,459	)
Prepaid expenses and other assets		9,060			(4,778	)
Accounts payable		3,531			(885	)
Accrued liabilities and excess facilities costs		13,001			(8,613	)
Deferred revenue		7,977			17,304
Net cash provided by operating activities		152,492			102,280
Cash flows from investing activities:
Purchases of short-term investments		(37,047	)		(140,928	)
Maturities and sales of short-term investments		124,032			450,311
Acquisitions, net of cash acquired		(20,098	)		(182,912	)
Purchases of private equity investments		(38	)		(63	)
Proceeds from private equity investments		347			803
Purchases of property and equipment		(8,937	)		(12,599	)
Restricted cash pledged as security		652			368
Net cash provided by investing activities		58,911			114,980
Cash flows from financing activities:
Proceeds from issuance of common stock		10,630			25,043
Repurchases of the Company’s common stock		(148,989	)		(226,932	)
Excess tax benefits from stock-based compensation		24,713			17,980
Principal payments on long-term debt		(1,924	)		(6,277	)
Proceeds from minority investors		—			189
Net cash used for financing activities		(115,570	)		(189,997	)
Effect of foreign exchange rate changes on cash and cash equivalents		(11,670	)		4,062
Net change in cash and cash equivalents		84,163			31,325
Cash and cash equivalents at beginning of period		170,237			138,912
Cash and cash equivalents at end of period	$	254,400		$	170,237

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, charges for acquired in-process research and development, costs related to formal restructuring activities, 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:

Stock-based Compensation

TIBCO incurs stock-based compensation expense under SFAS 123(R). 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 (including prior periods following the adoption of SFAS 123(R)). The exclusion of stock-based compensation from the non-GAAP measures also allows a consistent comparison of TIBCO’s relative historical financial performance, since the method for accounting for stock-based compensation changed at the beginning of fiscal 2006 when TIBCO adopted SFAS 123(R). 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.

Amortization of Acquired 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.

Acquired In-Process Research and Development

TIBCO recorded charges for acquired in-process research and development (“IPR&D”), included in its GAAP presentation of operating expense, in connection with its acquisitions. These amounts were expensed on the acquisition dates as the acquired technology had not yet reached technological feasibility and had no future alternative uses. There can be no assurance that acquisition of businesses, products or technologies in the future will not result in substantial charges for acquired IPR&D. Accordingly, acquired IPR&D are non-recurring and generally unpredictable. TIBCO believes that eliminating this expense, for the purposes of calculating non-GAAP operating income, non-GAAP net income and non-GAAP net income per share, is useful to investors.

Formal 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.

Equity Investment Activities

TIBCO records gains or losses on its equity investments based on its pro-rata share of gains or the net losses of the investment. These gains or net losses are included in TIBCO’s GAAP presentation of operating income, net income and net income per share. TIBCO’s business is not to invest in third parties, and such investments do not constitute a material portion of TIBCO’s assets. The timing and magnitude of gains and losses are unpredictable, as they are inherently based on the performance of the third party subject to a particular investment. 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 do not necessarily reflect expected future operating expense or income, 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)

	Three Months Ended										Year Ended
	November 30, 2008					November 30, 2007					November 30, 2008					November 30, 2007
	Operating Income		Net Income			Operating Income		Net Income			Operating Income		Net Income			Operating Income			Net Income
GAAP	$	40,705	$	32,291		$	37,486	$	27,645		$	65,735	$	52,411		$	62,957		$	51,888
Amortization of intangible assets - cost of revenue		3,957		3,957			3,829		3,829			15,745		15,745			10,326			10,326
Amortization of intangible assets - operating expense		4,026		4,026			4,164		4,164			16,557		16,557			13,164			13,164
Stock-based compensation - cost of revenue		640		640			647		647			2,612		2,612			2,465			2,465
Stock-based compensation - R&D expense		1,128		1,128			897		897			4,584		4,584			3,712			3,712
Stock-based compensation - S&M expense		1,874		1,874			1,593		1,593			6,963		6,963			5,695			5,695
Stock-based compensation - G&A expense		1,712		1,712			1,601		1,601			6,813		6,813			5,691			5,691
Acquired in-process research and development		—		—			—		—			—		—			1,600			1,600
Restructuring adjustment		—		—			—		—			—		—			(1,095	)		(1,095	)
Realized gain on sales of private equity investment		—		—			—		—			—		(125	)		—			(64	)
Income tax adjustment for non-GAAP (1)		—		(5,690	)		—		(6,225	)		—		(19,434	)		—			(16,212	)
Non-GAAP	$	54,042	$	39,938		$	50,217	$	34,151		$	119,009	$	86,126		$	104,515		$	77,170
Diluted net income per share:
GAAP			$	0.18				$	0.14				$	0.29					$	0.25
Non-GAAP			$	0.23				$	0.18				$	0.47					$	0.38
Shares used to compute diluted net income per share				175,758					192,940					183,742						205,316

⁽¹⁾ The estimated non-GAAP effective tax rate was approximately at 30% and 35% for fiscal 2008 and 2007, respectively, and has been used to adjust the provision for income taxes for non-GAAP purposes.