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<p align="center"><font size="3"><strong>UNITED STATES</br>
SECURITIES AND EXCHANGE COMMISSION</br>
Washington, D.C. 20549</strong></font></p>

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<p align="center"><font size="3"><strong>FORM 8-K</strong></font></p>
<HR WIDTH="25%">
<br>

<p align="center"><font size="3"><strong>
CURRENT REPORT
</strong></font></p>

<p align="center"><font size="3"><strong>
PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934
</strong></font></p>
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<U>April 2, 2004</U>
</strong></font></p>

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             Date of report (Date of earliest event reported)
</font></p>

<p align="center"><font size="5" color="#0000FF"><strong>
                 <u> SIEBEL SYSTEMS, INC.</u>
</strong></font></br>
<font size="2">
             (Exact name of Registrant as Specified in Charter)
</font></p>

<P>&nbsp;
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<font size="3"><strong>
<CENTER><u>Delaware</u></CENTER>
</font></strong>
</TD>
<TD>
<font size="3"><strong>
<CENTER><u>0-20725</u></CENTER>
</font></strong>
</TD>
<TD>
<font size="3"><strong>
<CENTER><u>94-3187233</u></CENTER>
</font></strong>
</TD>
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<TR>
<TD>
<font size="2">
<CENTER>&nbsp; (State or Other Jurisdiction of incorporation)&nbsp;</CENTER>
</font>
</TD>
<TD>
<font size="2">
<CENTER>(Commission File Number)</CENTER>
</font>
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<font size="2">
<CENTER>(IRS Employer Identification No.)</CENTER>
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                            2207 Bridgepointe Parkway<br>
                            <u>San Mateo, CA &nbsp; 94404
</strong></font></u><br>

<font size="2">
                   (Address of Principal Executive Offices, including Zip Code)
</font></p>

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                                 (650) 477-5000
</strong></font></u><br>

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             (Registrant's telephone number, including area code)
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<B><P ALIGN="JUSTIFY">Item 12.&#9;  Results of Operations and Financial Condition.</P></B>

<P ALIGN="JUSTIFY">On April 2, 2004, Siebel Systems, Inc. issued a press release announcing its
preliminary financial results for the first quarter ended March 31, 2004.   A copy of the press
release, dated as of April 2, 2004, entitled &quot;Siebel Systems License Revenues Up 13% -- Net Income Up 5x --
for the First Quarter Ended March 31, 2004&quot; is furnished as Exhibit 99.1 to this
Current Report and is incorporated herein by reference.</P>

<P ALIGN="JUSTIFY">The information in this report, including the exhibit hereto, shall not be deemed
to be &quot;filed&quot; for purposes of Section 18 of the Securities Exchange Act of 1934, as amended,
or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities
Act of 1933, as amended.  The information contained herein and in the accompanying exhibit shall not
be incorporated by reference into any registration statement or other document filed
with the Securities and Exchange Commission by Siebel
Systems, Inc., whether made before or after the date hereof, regardless of any general incorporation
language in such filing, except as shall be expressly set forth by specific reference in such filing.</P>


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</P><B><P ALIGN="CENTER">SIGNATURES</P>
</B><P ALIGN="JUSTIFY"><Font size="2">Pursuant to the requirements of the Securities Exchange Act of 1934, as amended,
the Registrant has duly caused this report to be signed on its behalf by the undersigned,
hereunto duly authorized.</P>

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    <TD>&nbsp;</TD>
    <TD align=left><FONT SIZE=2>
<B>                                   SIEBEL SYSTEMS, INC.</B>
</TD></TR></TABLE>

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    <TD>&nbsp;</TD>
    <TD align=left><FONT SIZE=2>
<I>(Registrant)</I>
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<FONT SIZE=2>
<p>Dated: April 2, 2004


<P>
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    <TD>&nbsp;</TD>
    <TD><FONT SIZE=2>By:&nbsp;</TD>
                                                                                                            <TD align=left><FONT SIZE=2>
/s/ Kenneth A. Goldman
</TD></TR></TABLE>


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    <TD>&nbsp;</TD>
    <TD align=left><FONT SIZE=2>
Kenneth A. Goldman
</TD></TR>
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    <TD>&nbsp;</TD>
    <TD align=left><FONT SIZE=2><I>
                                    Senior Vice President,<br>
                                    Finance and Administration<br>
                                    and Chief Financial Officer
</I></TD></TR></TABLE></P>

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<B><P ALIGN="Center">INDEX TO EXHIBITS</P></B>

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<P><FONT SIZE=2>
                                                                                                                                                                                                                                           99.1
</TD>
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<FONT SIZE=2><P>
Press Release, dated as of April 2, 2004, entitled &quot;Siebel Systems
License Revenues Up 13% -- Net Income Up 5x -- for the First Quarter Ended March 31, 2004.&quot;
</TD>
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4.04 8K doc
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934
April 2, 2004
Date of report (Date of earliest event reported)
SIEBEL SYSTEMS, INC.
(Exact name of Registrant as Specified in Charter)
Delaware
0-20725
94-3187233
(State or Other Jurisdiction of incorporation)
(Commission File Number)
(IRS Employer Identification No.)
2207 Bridgepointe Parkway
San Mateo, CA   94404
(Address of Principal Executive Offices, including Zip Code)
(650) 477-5000
(Registrant's telephone number, including area code)
Item 12.	  Results of Operations and Financial Condition.
On April 2, 2004, Siebel Systems, Inc. issued a press release announcing its
preliminary financial results for the first quarter ended March 31, 2004.   A copy of the press
release, dated as of April 2, 2004, entitled "Siebel Systems License Revenues Up 13% -- Net Income Up 5x --
for the First Quarter Ended March 31, 2004" is furnished as Exhibit 99.1 to this
Current Report and is incorporated herein by reference.
The information in this report, including the exhibit hereto, shall not be deemed
to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended,
or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities
Act of 1933, as amended.  The information contained herein and in the accompanying exhibit shall not
be incorporated by reference into any registration statement or other document filed
with the Securities and Exchange Commission by Siebel
Systems, Inc., whether made before or after the date hereof, regardless of any general incorporation
language in such filing, except as shall be expressly set forth by specific reference in such filing.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended,
the Registrant has duly caused this report to be signed on its behalf by the undersigned,
hereunto duly authorized.
SIEBEL SYSTEMS, INC.
(Registrant)
Dated: April 2, 2004
By:
/s/ Kenneth A. Goldman
Kenneth A. Goldman
Senior Vice President,
Finance and Administration
and Chief Financial Officer
INDEX TO EXHIBITS
99.1
Press Release, dated as of April 2, 2004, entitled "Siebel Systems
License Revenues Up 13% -- Net Income Up 5x -- for the First Quarter Ended March 31, 2004."