NORTHERN TRUST CORP
FIRST AMENDMENT DATED MARCH 25, 2004 RE: SEVERANCE PLAN
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<TYPE>EX-10.(VI)
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<DESCRIPTION>FIRST AMENDMENT DATED MARCH 25, 2004 RE: SEVERANCE PLAN
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 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT FACE="Times New Roman" SIZE="2"><B>Exhibit 10(vi) </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT
SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2"><B>FIRST AMENDMENT </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman"
SIZE="2"><B>OF THE </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2"><B>NORTHERN TRUST CORPORATION </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
FACE="Times New Roman" SIZE="2"><B>SEVERANCE PLAN </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman"
SIZE="2"><B>WHEREAS</B>, the Northern Trust Corporation (the &#147;Corporation&#148;) maintains the Northern Trust Corporation Severance Plan (the &#147;Plan&#148;); and </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT
SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2"><B>WHEREAS</B>, amendment of the Plan is now considered desirable; </FONT></P> <P
STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2"><B>NOW, THEREFORE</B>, by virtue and in exercise of the amending power
reserved to the Corporation under Section 6.1 of the Plan, the Plan is hereby amended as follows: </FONT></P> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">1.</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">To insert the following after the term &#147;Administrator&#148; where that term first appears in the second sentence of Section 5.1 of the Plan: </FONT></TD></TR></TABLE> <P
STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:8%"><FONT FACE="Times New Roman" SIZE="2">&#147;(including the Committee with respect to appeals of adverse benefit
determinations or denied claims under Section 5.6 and with respect to other responsibilities or duties delegated to the Committee under the Plan and/or by action of the Corporation, the Company, an Employer or the Administrator).&#148; </FONT></P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">2.</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">To add the following as new Section 5.8 of the Plan: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P> <P
STYLE="margin-top:0px;margin-bottom:0px; margin-left:8%"><FONT FACE="Times New Roman" SIZE="2"><B></B>&#147;5.8 Terms Include Authorized Delegates </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:8%"><FONT FACE="Times New Roman"
SIZE="2">Where appropriate, the term &#145;Company&#146;, &#145;Corporation&#146;, &#145;Committee&#146;, &#145;Employer&#146; or &#145;Administrator&#146; as used in this Plan shall also include any applicable subcommittee or any duly authorized
delegate of the Company, the Corporation, the Committee, the Employer or the Administrator, as the case may be. Such duly authorized delegate may be an individual or an organization within the Company, the Corporation, the Committee, the Employer or
the Administrator, or may be an unrelated third party individual or organization.&#148; </FONT></P> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">3.</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">To add the following at the end of Section 6.1 of the Plan: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
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<TD WIDTH="5%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">&#147;(a)</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">Any termination shall be made by action of the Compensation and Benefits Committee of the Board of Directors of the Corporation (the &#147;Board&#148;) (or by action of the Board if
the Compensation and Benefits Committee is unavailable or unable to act for any reason) and shall be effective as of the date set forth in such resolution. </FONT></TD></TR></TABLE>

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<TD WIDTH="5%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">(b)</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">Any amendment shall be made in accordance with the following: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">(i)</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">material amendments to the Plan (including any extraordinary amendment related to an acquisition or divestiture by the Company or the Corporation) shall be made by action of the
Compensation and Benefits Committee of the Board (or by action of the Board, if the Compensation and Benefits Committee is unavailable or unable to act for any reason); and </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT
SIZE="1">&nbsp;</FONT></P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">(ii)</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">(a) non-material or administrative amendments to the Plan (including any amendment pursuant to guidelines established by the Compensation and Benefits Committee of the Board related
to an acquisition or divestiture by the Company or the Corporation) or (b) any amendment to the Plan deemed required, authorized or desirable under applicable statutes, regulations or rulings, shall be made by action of either the Chairman and Chief
Executive Officer of the Corporation or the Executive Vice President and Human Resources Department Head of the Corporation (or either of their duly authorized designees).&#148; </FONT></TD></TR></TABLE> <P
STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2"><B>IN WITNESS WHEREOF</B>, the Corporation has caused this amendment to be
executed on its behalf this 25</FONT><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><SUP>th</SUP></FONT><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"> of March, 2004 effective such 25</FONT><FONT FACE="Times New Roman" SIZE="1"
COLOR="#000000"><SUP>th</SUP></FONT><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"> of March, 2004. </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P><DIV ALIGN="right">
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<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2"><B>NORTHERN TRUST CORPORATION</B></FONT></P></TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">By:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">/s/ Timothy P. Moen</FONT></P><HR SIZE="1" NOSHADE COLOR="#000000"></TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">Name:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">Timothy P. Moen</FONT></P></TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">Title:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">Executive Vice President</FONT></P></TD></TR>
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 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">- 2 - </FONT></P>

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