<html>
  <head>
    <title>
      S-8 for 401k - 2006
</title>
<!-- Licensed to: Caterpillar Inc.-->
<!-- Document Created using EDGARIZER HTML 3.0.3.0 -->
<!-- Copyright 2005 EDGARfilings, Ltd., an IEC company.-->
<!-- All rights reserved EDGARfilings.com -->
</head>
  <body bgcolor="#ffffff"><br>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>As
      filed
      with the Securities and Exchange Commission on April 13,
      2006</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Registration
      No. 333-</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>UNITED
      STATES</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>SECURITIES
      AND EXCHANGE COMMISSION</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>WASHINGTON,
      D.C. 20549</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><img src="catlogo.jpg" alt=""></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Arial"><strong>FORM
      S-8</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">REGISTRATION
      STATEMENT UNDER THE</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">SECURITIES
      ACT OF
      1933</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>CATERPILLAR
      INC.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Exact
      Name of
      Registrant as Specified in Its Charter)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">

            <tr>
              <td valign="top" width="35%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
                <div style="DISPLAY: block; MARGIN-LEFT: 40pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Delaware</strong></font></div>
              </td>
              <td valign="top" width="12%">&#160;</td>
              <td valign="top" width="31%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
                <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: -18pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>37-0602744</strong></font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="35%">
                <hr style="COLOR: black" noshade size="2" width="100%">
              </td>
              <td valign="top" width="12%">&#160;</td>
              <td valign="top" width="31%">
                <hr style="COLOR: black" noshade size="2" width="100%">
              </td>
            </tr>
            <tr>
              <td valign="top" width="35%">
                <div style="DISPLAY: block; MARGIN-LEFT: 40pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(State
                  of
                  Incorporation)</font></div>
              </td>
              <td valign="top" width="12%">&#160;</td>
              <td valign="top" width="31%">
                <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(IRS
                  Employer
                  Identification No.)</font></div>
              </td>
            </tr>
            <tr>
              <td colspan="3" valign="top" width="79%">
                <div style="DISPLAY: block; MARGIN-LEFT: 40pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>100
                  NE Adams Street</strong></font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 40pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Peoria,
                  Illinois 61629</strong></font></div>
              </td>
            </tr>
            <tr>
              <td colspan="3" valign="top" width="79%">
                <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Address
                  of
                  Principal Executive Offices)</font></div>
              </td>
            </tr>

        </table>
      </div>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 36pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>&#160;<font id="TAB2" style="LETTER-SPACING: 5pt">&#160;&#160;&#160;</font>&#160;</strong></font><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Arial"><strong>Caterpillar
      401(k) Plan</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Full
      Title of the
      Plan)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>James
      B.
      Buda</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Vice
      President, Secretary and General Counsel</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Caterpillar
      Inc.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>100
      NE
      Adams Street</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Peoria,
      IL
      61629-7310</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>(309)
      675-4429</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 27.35pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Name,
      Address and
      Telephone Number, Including Area Code, of Agent for Service)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 27.35pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 21.6pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>CALCULATION
      OF REGISTRATION FEE</strong></font></div>
    <div>
      <table border="1" bordercolor="silver" cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Title
                of
                securities </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">to
                be
                registered</font></div>
            </td>
            <td valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Amount
                to
                </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">be
                registered</font></div>
            </td>
            <td valign="top" width="18%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Proposed
                maximum offering price per share</font></div>
            </td>
            <td valign="top" width="18%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Proposed
                maximum aggregate offering price</font></div>
            </td>
            <td valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Amount
                of</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">registration
                fee</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Common
                Stock
                par value 1.00</font></div>
            </td>
            <td valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">50,000,000
                shares(1)</font></div>
            </td>
            <td valign="top" width="18%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">$
                75.3550(2)</font></div>
            </td>
            <td valign="top" width="18%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">$3,767,750,000
                </font></div>
            </td>
            <td valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">$403,149.25
                </font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 27.35pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(1)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 5pt">&#160;&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Pursuant
      to Rule
      416(c) under the Securities Act of 1933, as amended (the &#8220;Securities Act&#8221;), this
      Registration Statement also covers an indeterminate amount of interests to
      be
      offered or sold pursuant to the Caterpillar 401(k) Plan (the &#8220;Plan&#8221;). In
      addition, this Registration Statement covers an indeterminate amount of
      additional securities that may be issued under the Plan pursuant to the
      anti-dilution provisions of the Plan.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(2)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 5pt">&#160;&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Estimated
      solely
      for the purposes of calculating the registration fee, computed pursuant to
      Rules
      457(c) and (h) under the Securities Act on the basis of the average of the
      high
      and low sales prices of a share of Caterpillar Inc. Common Stock, as reported
      on
      the New York Stock Exchange - Composite Transactions System on April 7,
      2006.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;

      <div>
        <hr style="COLOR: gray" align="left" noshade size="2" width="100%">
      </div>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">&#160;<font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Arial"><strong>Part
      I</strong></font>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div><br>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>EXPLANATORY
      NOTE</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">This
      Registration
      Statement on Form S-8 is being filed for the purpose of registering an
      additional 50,000,000 shares of the Registrant&#8217;s Common Stock to be issued
      pursuant to the Caterpillar 401(k) Plan, as amended (the &#8220;Plan&#8221;). In accordance
      with Section E of the General Instructions to Form S-8, the Registrant and
      the
      Plan hereby incorporate by reference the contents of the previous Registration
      Statement filed by the Registrant and the Plan on Form S-8, as amended by
      Post-Effective Amendment No. 1 to Form S-8 (Registration No.
      333-111355).</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 15pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 15pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 15pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Arial"><strong>Part
      II</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 15pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 15pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>INFORMATION
      REQUIRED IN THE REGISTRATION STATEMENT</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      8.</strong></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 45.4pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Exhibits.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 55pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">The
      following is a
      complete list of exhibits filed as a part of this Registration
      Statement:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="16%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Exhibit
                No.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="64%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Description</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="16%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="64%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>
          <tr>
            <td valign="top" width="16%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">23.1</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="64%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Consent
                of
                PricewaterhouseCoopers LLP</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">Page
      2<br>&#160;</div>
    <div>
      <hr style="COLOR: gray" align="left" noshade size="2" width="100%">
    </div>
    <div><br>&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td colspan="4" valign="top" width="83%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>SIGNATURES</strong></font></div>
            </td>
          </tr>
          <tr>
            <td align="justify" colspan="4" valign="top" width="83%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Pursuant
                to the requirements of the Securities Act of 1933, as amended, the
                Registrant certifies that it has reasonable grounds to believe that
                it
                meets all the requirements for filing on Form S-8 and has duly caused
                this
                Registration Statement to be signed on its behalf by the undersigned,
                thereunto duly authorized, in the City of Peoria, and the State of
                Illinois.</strong></font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td valign="top" width="15%">&#160;</td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>CATERPILLAR
                INC. </strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 40pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Registrant)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">By:</font></div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/James
                B. Buda</em></font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="25%">&#160;</td>
            <td valign="top" width="15%">&#160;</td>
            <td valign="top" width="5%">&#160;</td>
            <td valign="top" width="38%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">&#160;</td>
            <td valign="top" width="15%">&#160;</td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">James
                B.
                Buda, </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>Secretary</em></font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="left" colspan="4" valign="top" width="83%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Pursuant
                to the requirements of the Securities Act of 1933, as amended, this
                Registration Statement has been signed by the following persons in
                the
                capacities and on the dates indicated.</strong></font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">&#160;</td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/James
                W. Ownes</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Chairman
                of
                the Board, Director </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">and
                Chief
                Executive Officer</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(James
                W.
                Owens)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/
                Stu
                L. Levenick</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Group
                President</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Stu
                L.
                Levenick)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/.Douglas
                R. Oberhelman</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Group
                President</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Douglas
                R.
                Oberhelman)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Gerald
                L. Shaheen</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Group
                President</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Gerald
                L.
                Shaheen)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Gerard
                R. Vittecoq</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Group
                President</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Gerard
                R.
                Vittecoq)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Steven
                H. Wunning</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Group
                President</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Steven
                H.
                Wunning)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/David
                B. Burritt</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Vice
                President and</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Chief
                Financial Officer</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(David
                B.
                Burritt)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="bottom" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Bradley
                M. Halverson</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Controller
                and </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Chief
                Accounting Officer</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Bradley
                M.
                Halverson</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>)</strong></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="top" width="31%">&#160;</td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div>&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">&#160;Page
      3

      <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
        <hr style="COLOR: gray" align="left" noshade size="2" width="100%">
      </div>
    </div>
    <div><br>&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/W.
                Frank Blount</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(W.
                Frank
                Blount)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/John
                R. Brazil</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(John
                R.
                Brazil)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/John
                T. Dillon</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(John
                T.
                Dillon)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Eugene
                V. Fife</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Eugene
                V.
                Fife)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Gail
                D. Fosler</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Gail
                D.
                Fosler)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Juan
                Gallardo</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Juan
                Gallardo)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/David
                R. Goode</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(David
                R.
                Goode)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Peter
                A. Magowan</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Peter
                A.
                Magowan)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/William
                A. Osborn</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(William
                A.
                Osborn)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Gordon
                R. Parker</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Gordon
                R.
                Parker)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Charles
                D. Powell</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Charles
                D.
                Powell)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Edward
                B. Rust, Jr.</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Edward
                B.
                Rust, Jr.)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/Joshua
                I. Smith</em></font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="33%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="21%">&#160;</td>
            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Joshua
                I
                Smith)</font></div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td valign="bottom" width="33%">&#160;</td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">Page
      4</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <div>
        <hr style="COLOR: gray" align="left" noshade size="2" width="100%">
      </div><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="justify" colspan="4" valign="top" width="83%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Pursuant
                to the requirements of the Securities Act of 1933, as amended, the
                Plan
                has duly caused this Registration Statement to be signed on its behalf
                by
                the undersigned, thereunto authorized, in the City of Peoria, the
                State of
                Illinois.</strong></font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td valign="top" width="15%">&#160;</td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>CATERPILLAR
                401(k) PLAN</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">April
                13,
                2006</font></div>
            </td>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">By:</font></div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/S.
                C.
                Banwart</em></font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="25%">&#160;</td>
            <td valign="top" width="15%">&#160;</td>
            <td valign="top" width="5%">&#160;</td>
            <td valign="top" width="38%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">&#160;</td>
            <td valign="top" width="15%">&#160;</td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>S.
                C.
                Banwart</em></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>Plan
                Administrator</em></font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">Page
      5</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">
      <div>
        <hr style="COLOR: gray" align="left" noshade size="2" width="100%">
      </div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 255pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong><u>Exhibit
      Index</u></strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="12%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Exhibit
                No.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="72%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Description</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="12%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="72%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>
          <tr>
            <td valign="top" width="12%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">23.1</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="72%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Consent
                of
                PricewaterhouseCoopers LLP</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;Page
      6

      <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
        <hr style="COLOR: gray" align="left" noshade size="2" width="100%">
      </div>
    </div>
  </body>
</html>
[{"type": "S-8", "sequence": "1", "filename": "s8-401k_2006.htm", "description": "S-8 FOR 401K - 2006", "secsgml_size_bytes": 84667}]
{"company-data": {"conformed-name": "CATERPILLAR INC", "cik": "0000018230", "assigned-sic": "3531", "irs-number": "370602744", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-133265", "film-number": "06758158"}, "business-address": {"street1": "100 NE ADAMS ST", "city": "PEORIA", "state": "IL", "zip": "61629", "phone": "3096751000"}, "mail-address": {"street1": "100 NE ADAMS ST", "city": "PEORIA", "state": "IL", "zip": "61629"}, "former-company": {"former-conformed-name": "CATERPILLAR TRACTOR CO", "date-changed": "19860623"}}
S-8 for 401k - 2006
As
      filed
      with the Securities and Exchange Commission on April 13,
      2006
Registration
      No. 333-
UNITED
      STATES
SECURITIES
      AND EXCHANGE COMMISSION
WASHINGTON,
      D.C. 20549
FORM
      S-8
REGISTRATION
      STATEMENT UNDER THE
SECURITIES
      ACT OF
      1933
CATERPILLAR
      INC.
(Exact
      Name of
      Registrant as Specified in Its Charter)
Delaware
37-0602744
(State
                  of
                  Incorporation)
(IRS
                  Employer
                  Identification No.)
100
                  NE Adams Street
Peoria,
                  Illinois 61629
(Address
                  of
                  Principal Executive Offices)
Caterpillar
      401(k) Plan
(Full
      Title of the
      Plan)
James
      B.
      Buda
Vice
      President, Secretary and General Counsel
Caterpillar
      Inc.
100
      NE
      Adams Street
Peoria,
      IL
      61629-7310
(309)
      675-4429
(Name,
      Address and
      Telephone Number, Including Area Code, of Agent for Service)
CALCULATION
      OF REGISTRATION FEE
Title
                of
                securities
to
                be
                registered
Amount
                to
be
                registered
Proposed
                maximum offering price per share
Proposed
                maximum aggregate offering price
Amount
                of
registration
                fee
Common
                Stock
                par value 1.00
50,000,000
                shares(1)
$
                75.3550(2)
$3,767,750,000
$403,149.25
(1)
Pursuant
      to Rule
      416(c) under the Securities Act of 1933, as amended (the "Securities Act"), this
      Registration Statement also covers an indeterminate amount of interests to
      be
      offered or sold pursuant to the Caterpillar 401(k) Plan (the "Plan"). In
      addition, this Registration Statement covers an indeterminate amount of
      additional securities that may be issued under the Plan pursuant to the
      anti-dilution provisions of the Plan.
(2)
Estimated
      solely
      for the purposes of calculating the registration fee, computed pursuant to
      Rules
      457(c) and (h) under the Securities Act on the basis of the average of the
      high
      and low sales prices of a share of Caterpillar Inc. Common Stock, as reported
      on
      the New York Stock Exchange - Composite Transactions System on April 7,
      2006.
Part
      I
EXPLANATORY
      NOTE
This
      Registration
      Statement on Form S-8 is being filed for the purpose of registering an
      additional 50,000,000 shares of the Registrant's Common Stock to be issued
      pursuant to the Caterpillar 401(k) Plan, as amended (the "Plan"). In accordance
      with Section E of the General Instructions to Form S-8, the Registrant and
      the
      Plan hereby incorporate by reference the contents of the previous Registration
      Statement filed by the Registrant and the Plan on Form S-8, as amended by
      Post-Effective Amendment No. 1 to Form S-8 (Registration No.
      333-111355).
Part
      II
INFORMATION
      REQUIRED IN THE REGISTRATION STATEMENT
Item
      8.
Exhibits.
The
      following is a
      complete list of exhibits filed as a part of this Registration
      Statement:
Exhibit
                No.
Description
23.1
Consent
                of
                PricewaterhouseCoopers LLP
Page
      2
SIGNATURES
Pursuant
                to the requirements of the Securities Act of 1933, as amended, the
                Registrant certifies that it has reasonable grounds to believe that
                it
                meets all the requirements for filing on Form S-8 and has duly caused
                this
                Registration Statement to be signed on its behalf by the undersigned,
                thereunto duly authorized, in the City of Peoria, and the State of
                Illinois.
CATERPILLAR
                INC.
(Registrant)
April
                13,
                2006
By:
/s/James
                B. Buda
James
                B.
                Buda,
Secretary
Pursuant
                to the requirements of the Securities Act of 1933, as amended, this
                Registration Statement has been signed by the following persons in
                the
                capacities and on the dates indicated.
April
                13,
                2006
/s/James
                W. Ownes
Chairman
                of
                the Board, Director
and
                Chief
                Executive Officer
(James
                W.
                Owens)
April
                13,
                2006
/s/
                Stu
                L. Levenick
Group
                President
(Stu
                L.
                Levenick)
April
                13,
                2006
/s/.Douglas
                R. Oberhelman
Group
                President
(Douglas
                R.
                Oberhelman)
April
                13,
                2006
/s/Gerald
                L. Shaheen
Group
                President
(Gerald
                L.
                Shaheen)
April
                13,
                2006
/s/Gerard
                R. Vittecoq
Group
                President
(Gerard
                R.
                Vittecoq)
April
                13,
                2006
/s/Steven
                H. Wunning
Group
                President
(Steven
                H.
                Wunning)
April
                13,
                2006
/s/David
                B. Burritt
Vice
                President and
Chief
                Financial Officer
(David
                B.
                Burritt)
April
                13,
                2006
/s/Bradley
                M. Halverson
Controller
                and
Chief
                Accounting Officer
(Bradley
                M.
                Halverson
)
Page
      3
April
                13,
                2006
/s/W.
                Frank Blount
Director
(W.
                Frank
                Blount)
April
                13,
                2006
/s/John
                R. Brazil
Director
(John
                R.
                Brazil)
April
                13,
                2006
/s/John
                T. Dillon
Director
(John
                T.
                Dillon)
April
                13,
                2006
/s/Eugene
                V. Fife
Director
(Eugene
                V.
                Fife)
April
                13,
                2006
/s/Gail
                D. Fosler
Director
(Gail
                D.
                Fosler)
April
                13,
                2006
/s/Juan
                Gallardo
Director
(Juan
                Gallardo)
April
                13,
                2006
/s/David
                R. Goode
Director
(David
                R.
                Goode)
April
                13,
                2006
/s/Peter
                A. Magowan
Director
(Peter
                A.
                Magowan)
April
                13,
                2006
/s/William
                A. Osborn
Director
(William
                A.
                Osborn)
April
                13,
                2006
/s/Gordon
                R. Parker
Director
(Gordon
                R.
                Parker)
April
                13,
                2006
/s/Charles
                D. Powell
Director
(Charles
                D.
                Powell)
April
                13,
                2006
/s/Edward
                B. Rust, Jr.
Director
(Edward
                B.
                Rust, Jr.)
April
                13,
                2006
/s/Joshua
                I. Smith
Director
(Joshua
                I
                Smith)
Page
      4
Pursuant
                to the requirements of the Securities Act of 1933, as amended, the
                Plan
                has duly caused this Registration Statement to be signed on its behalf
                by
                the undersigned, thereunto authorized, in the City of Peoria, the
                State of
                Illinois.
CATERPILLAR
                401(k) PLAN
April
                13,
                2006
By:
/s/S.
                C.
                Banwart
S.
                C.
                Banwart
Plan
                Administrator
Page
      5
Exhibit
      Index
Exhibit
                No.
Description
23.1
Consent
                of
                PricewaterhouseCoopers LLP
Page
      6