Siebel Systems Announces Stockholder Meeting Conference Call Details

Siebel Systems, Inc. (NASDAQ:SEBL) today announced
details for its Special Meeting of Stockholders to be held on January
31, 2006 at 11:00 a.m. Pacific Time to vote on the proposed
acquisition of the Company by Oracle Corporation (NASDAQ:ORCL).
   As previously announced, the meeting will take place at the San
Mateo Marriott Hotel, 1770 South Amphlett Boulevard, San Mateo,
California, 94402. In addition, the meeting will be accessible via
telephone in listen-only mode by dialing 1-888-754-4179 toll-free
within North America or [phone] outside of North America.
Access is also available online at www.siebel.com/investor. A replay
of the meeting will be available at this same Web address.

   About Siebel Systems

   Siebel Systems is a leading provider of software solutions and
services that drive value and loyalty in client-customer
relationships, providing best-in-class capabilities in on-premise and
hosted customer relationship management (CRM), business analytics, and
customer data integration. Siebel's new Customer Adaptive Solutions
enable organizations to model their customer-centric business
processes in order to drive the most effective customer interactions,
gain increased insight over time, and continually realign those
processes for systemic and consistent improvement. With more than $2
billion in R&D investments, 11-plus years of customer software
experience, an extensive global ecosystem of alliance partners, and
more than 4,000 customers and 3.7 million live users, Siebel is the
proven choice in helping organizations of all types and sizes achieve
customer-driven business results. For more information, visit
www.siebel.com.

   For more information on Siebel Systems solutions and services,
please visit our Web site: CRM - http://www.siebel.com/crm; OnDemand
Solutions - http://www.crmondemand.com; Industry CRM -
http://www.siebel.com/industry-crm; Call Center and Service -
http://www.siebel.com/call-center; Sales Force Automation -
http://www.siebel.com/sales-force-automation; Marketing Automation -
http://www.siebel.com/marketing-automation; Business Intelligence -
http://www.siebel.com/business-intelligence; Integration Solutions -
http://www.siebel.com/integration-solutions; CRM Services -
http://www.siebel.com/crm-services

   Siebel is a trademark of Siebel Systems, Inc. and may be
registered in certain jurisdictions. All other product and company
names mentioned are the property of their respective owners and are
mentioned for identification purposes only.