TIBCO Announces Agreement to Acquire Insightful Corporation

PALO ALTO, Calif., June 19, 2008 – TIBCO Software Inc. (Nasdaq: TIBX) today announced that it has entered into a definitive agreement to acquire Insightful Corporation (Nasdaq: IFUL), a provider of statistical data analysis and data mining solutions, in a transaction valued at approximately $25 million in which Insightful stockholders will receive cash. Insightful technologies are expected to complement key growth areas within TIBCO's business optimization portfolio, including TIBCO Spotfire's Enterprise Analytic Platform.

Additional Information and Where to Find It
This communication may be deemed to be solicitation material in respect of the proposed merger. In connection with such proposed merger, Insightful Corporation has agreed to file a proxy statement and other materials with the SEC. The proxy statement will be mailed to the stockholders of Insightful Corporation. We urge investors to read the proxy statement and these other materials carefully when they become available because they will contain important information about Insightful Corporation and the proposed merger. Investors will be able to obtain free copies of the proxy statement and white proxy card (when available) as well as other filed documents containing information about Insightful Corporation at http://www.sec.gov, the SEC's Web site. Free copies of Insightful Corporation's SEC filings are also available on the investor relations portion of Insightful Corporation's web site at www.insightful.com.

Information regarding the identity of the persons who may, under SEC rules, be deemed to be participants in the solicitation of stockholders of Insightful Corporation in connection with the transaction, and their interests in the solicitation, will be set forth in a proxy statement that will be filed by Insightful Corporation with the SEC.