Filed Pursuant to Rule 425








September 12, 2005


Dear Oracle Partner:


Today we announced our plan to buy Siebel, the leading provider of Customer Relationship Management (CRM) software, solidifying Oracle’s position as the number one applications company in North America and moving us closer to the number one position globally. We expect the transaction to close in early 2006, subject to regulatory and other approvals. Until the deal closes, each company will continue to operate independently, and it is business as usual.


This is a customer driven acquisition. Our joint customers have consistently recommended this transaction to both companies for over a year. Siebel provides best-in-class customer-facing products and industry solutions to over 4,000 customers and close to 3.5 million end users, and we will make the features of those products the centerpiece of our Project Fusion CRM products. Siebel boasts 98% customer loyalty across its customer base, and has proven flexible deployment options and demonstrated ROI. Siebel CRM, Oracle ERP, Oracle Fusion Middleware and Oracle 10g Database combine to form a complete, world-class set of customer-centric, information age applications. Together we become a stronger, more strategic partner, with complementary resources and maximum deployment flexibility. Our customers and partners have asked for it directly.


Customer investments in Oracle and Siebel CRM will be fully supported and protected. We plan to continue to provide product enhancements and support to Oracle, PeopleSoft, and JD Edwards CRM products, and we encourage our customers to continue to use, deploy, and upgrade to new versions of these products. In Oracle’s next generation CRM, customers will benefit from the best features of Oracle, PeopleSoft, JD Edwards, and Siebel products. Customers will also gain access to Siebel CRM best practices and to a range of Siebel customer-facing modules that are complementary to Oracle’s offerings, including industry-tailored CRM, analytics, and customer data integration.


Oracle and Siebel partners will benefit through an expanded product footprint in customer-facing solutions and have a single vendor to address customer needs for CRM, analytics, customer data integration, ERP, and infrastructure technologies. Moreover, Siebel partners will be able to take advantage of Oracle’s worldwide resources and increased partner investment while Oracle partners will benefit from Siebel’s best-in-class customer-facing products, Customer Experience consulting, and proven best practices tailored to industry needs.


As our current partners know, partnership with Oracle opens the door for partners to leverage the strengths, competencies, and expertise of a global community. The synergy created through these partnerships and the integration of Oracle and Siebel will accelerate our partners’ growth into more industries, across broader geographies and channels, and into additional market segments.


To learn more about the Siebel acquisition, please join Oracle and Siebel in a session at Oracle OpenWorld in San Francisco on Monday, September 19. A replay of the session will also be available at, along with other important information regarding the transaction.


We are dedicated to maintaining and increasing the quality of innovation, support and service you have come to expect from Oracle and Siebel. We look forward to providing you the best and most complete customer-centric technology platform for your business.




Charles Phillips



The above is for informational purposes only and may not be incorporated into a contract.


Important Information


This document may be deemed to be solicitation material in respect of the proposed business combination of Oracle and Siebel. In connection with the proposed transaction, a registration statement on Form S-4 will be filed with the SEC. STOCKHOLDERS OF SIEBEL ARE ENCOURAGED TO READ THE REGISTRATION STATEMENT AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, INCLUDING THE PROXY STATEMENT THAT WILL BE PART OF THE REGISTRATION STATEMENT, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED BUSINESS COMBINATION. The final proxy statement/prospectus will be mailed to stockholders of Siebel. Investors and security holders will be able to obtain the documents free of charge at the SEC’s website,, from Oracle Corporation, 500 Oracle Parkway, Redwood Shores, California, Attention: Investor Relations, or from Siebel Systems, Inc., 2207 Bridgepointe Parkway, San Mateo, California 94404, Attention: Investor Relations.


Oracle, Siebel and their respective directors and executive officers and other members of management and employees may be deemed to participate in the solicitation of proxies in respect of the proposed transactions. Information regarding Oracle’s directors and executive officers is available in Oracle’s proxy statement for its 2005 annual meeting of shareholders, which was filed with the SEC on August 30, 2005, and information regarding Siebel’s directors and executive officers is available in Siebel’s proxy statement for its 2005 annual meeting of stockholders, which was filed with the SEC on April 29, 2005. Additional information regarding the interests of such potential participants will be included in the proxy statement/prospectus and the other relevant documents filed with the SEC when they become available.


Cautionary Statement Regarding Forward-Looking Statements


This document contains certain forward-looking statements about Oracle and Siebel. When used in this document, the words “anticipates”, “may”, “can”, “believes”, “expects”, “projects”, “intends”, “likely”, similar expressions and any other statements that are not historical facts, in each case as they relate to Oracle and Siebel, the management of either such company or the transaction are intended to identify those assertions as forward-looking statements. In making any such statements, the person making them believes that its expectations are based on reasonable assumptions. However, any such statement may be influenced by factors that could cause actual outcomes and results to be materially different from those projected or anticipated. These forward-looking statements are subject to numerous risks and uncertainties. There are various important factors that could cause actual results to differ materially from those in any such forward-looking statements, many of which are beyond the control of Oracle and Siebel, including: the impact of general economic conditions in regions in which either such company currently does business, industry conditions, including competition, fluctuations in exchange rates and currency values, capital expenditure requirements, legislative or regulatory requirements, changes in the tax laws, interest rates and access to capital markets. The actual results or performance by Oracle or Siebel could differ materially from those expressed in, or implied by, these forward-looking statements. Accordingly, no assurances can be given that any of the events anticipated by the forward-looking statements will transpire or occur, or if any of them do so, what impact they will have on the results of operations or financial condition of Oracle or Siebel.