SEEBEYOND TECHNOLOGY CORP
EXHIBIT 10.23
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<TYPE>EX-10.23
<SEQUENCE>5
<FILENAME>a2106431zex-10_23.htm
<DESCRIPTION>EXHIBIT 10.23
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<P ALIGN="RIGHT"><FONT SIZE=2><B>Exhibit&nbsp;10.23  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="ma1147_second_addendum_to_lease"> </A>
<A NAME="toc_ma1147_1"> </A>
<BR></FONT><FONT SIZE=2><B>SECOND ADDENDUM TO LEASE    <BR>  </B></FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;THIS SECOND AMENDMENT TO LEASE is entered as of the 25<SUP>th</SUP> day of October&nbsp;2002, by and between FOOTHILL TECHNOLOGY CENTER LLC,
(BOONE/FETTER/OCCIDENTAL I)&nbsp;(hereinafter referred to as the "LESSOR") and SEEBEYOND TECHNOLOGY CORPORATION (SOFTWARE TECHNOLOGIES CORPORATION) (hereinafter referred to as the "LESSEE") with
reference to the following facts and circumstances: </FONT></P>

<UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A.&nbsp;&nbsp;&nbsp;&nbsp;Lessor
and Lessee entered that certain Standard Industrial/Commercial Single-Tenant Lease Net dated June&nbsp;6, 1997, regarding 50,287 rentable square feet of space
(the "Existing Space") located at 404/408 East Huntington Drive, Monrovia, Los Angeles County, California, as amended and supplemented by that certain Rider to Lease dated June&nbsp;6, 1997, and
First Amendment to Lease dated August&nbsp;5, 1998, between Lessor and Lessee (such Lease, as so amended and supplemented, being referred to herein as the "Lease"). </FONT></P>


<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B.&nbsp;&nbsp;&nbsp;&nbsp;Lessor
and Lessee mutually desire that the Premises subject to the Lease be decreased by 17,775 rentable square feet of space in the building located at the Project as
outlined in "Exhibit A" attached hereto. </FONT></P>

</UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NOW,
THEREFORE, in consideration of the premises and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Lessor and Lessee hereby
agree as follows: </FONT></P>

<UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.&nbsp;&nbsp;&nbsp;&nbsp;Effective
March&nbsp;31, 2003 (the "Effective Date"), Paragraph&nbsp;1.2 of the Lease is amended by deleting the term "60,267" and substituting "42,492" in lieu
thereof. </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.&nbsp;&nbsp;&nbsp;&nbsp;From
and after the Effective Date, Base Rent per month under the Lease shall equal the following: </FONT></P>

</UL>
<P ALIGN="CENTER"><FONT SIZE=2>Remainder
of Original Term $48,865.80 a month NNN </FONT></P>

<UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.&nbsp;&nbsp;&nbsp;&nbsp;Except
as expressly amended hereby, the Lease shall remain in full force and effect. All capitalized terms used, but not defined, herein shall have the meanings ascribed
to them in the Lease. Unless expressly provided otherwise, all paragraph references herein shall be to paragraphs of the Lease. </FONT></P>

</UL>
<P ALIGN="CENTER"><FONT SIZE=2>1</FONT></P>

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<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN
WITNESS WHEREOF, Lessor and Lessee have executed this Second Amendment to Lease as of the day and year first above written. </FONT></P>

<P><FONT SIZE=2>Executed
at Monrovia, CA on November 5, 2002 </FONT></P>

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<TD WIDTH="46%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>LESSOR:</FONT></TD>
</TR>
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<TD WIDTH="46%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>FOOTHILL TECHNOLOGY CENTER LLC</FONT></TD>
</TR>
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<TD WIDTH="46%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="5%"><FONT SIZE=2><BR>
By:</FONT></TD>
<TD WIDTH="46%"><FONT SIZE=2><BR>
/s/ BLAINE P. FETTER</FONT><HR NOSHADE><FONT SIZE=2> Blaine P. Fetter<BR>
Manager</FONT></TD>
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<P><FONT SIZE=2>Executed
at <U>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U> on November
5, 2002 </FONT></P>

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<TD WIDTH="46%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>LESSEE:</FONT></TD>
</TR>
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<TD WIDTH="46%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=2><FONT SIZE=2>SEEBEYOND TECHNOLOGY CORPORATION</FONT></TD>
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&nbsp;</FONT></TD>
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<TD WIDTH="6%"><FONT SIZE=2><BR>
By:</FONT></TD>
<TD WIDTH="46%"><FONT SIZE=2><BR>
/s/ BARRY J PLAGA</FONT><HR NOSHADE><FONT SIZE=2> BARRY J PLAGA</FONT></TD>
</TR>
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&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="6%"><FONT SIZE=2><BR>
Title:</FONT></TD>
<TD WIDTH="46%"><FONT SIZE=2><BR>
SVP OF FINANCE AND CFO</FONT></TD>
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<P ALIGN="CENTER"><FONT SIZE=2>2</FONT></P>

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<A NAME="page_ma1147_1_3"> </A>
<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="ma1147_exhibit__a_"> </A>
<A NAME="toc_ma1147_2"> </A>
<BR></FONT><FONT SIZE=2><B>EXHIBIT "A"    <BR>  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>[GRAPHIC] </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>3</FONT></P>

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<P><br><A NAME="03WLA1148_4">QuickLinks</A><br></P><!-- TOC_BEGIN -->
<FONT SIZE=2><A HREF="#toc_ma1147_1">SECOND ADDENDUM TO LEASE</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_ma1147_2">EXHIBIT "A"</A></FONT><BR>

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