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      8-K for AMC Subs 050406
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      STATES</font></div>
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      AND EXCHANGE COMMISSION</font></div>
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      D.C. 20549</font></div>
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                8-K</font></div>
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      REPORT</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: Times New Roman">Pursuant
      to Section 13 or 15(d) of the</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: Times New Roman">Securities
      Exchange Act of 1934</font></div>
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    <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: Times New Roman">Date
      of
      report (Date of earliest event reported):</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><a name="ReportDate"/></div>
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              <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: Times New Roman">May
                2 , 2006</font></div>
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              <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: Times New Roman"><u>Commission
                File Number</u></font></div>
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              <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: Times New Roman">Exact
                Name of Registrant as Specified in Charter;</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: Times New Roman">State
                of Incorporation;</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: Times New Roman"><u>Address
                and Telephone Number</u></font></div>
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              <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: Times New Roman">IRS
                Employer</font></div>
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                Number</u></font></div>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                Corporation</font></a></div>
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                Corporation)</font></div>
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                Chouteau Avenue</font></div>
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                Louis, Missouri 63103</font></div>
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                621-3222</font></div>
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            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                Electric Company</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: Times New Roman">(Missouri
                Corporation)</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: Times New Roman">1901
                Chouteau Avenue</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: Times New Roman">St.
                Louis, Missouri 63103</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: Times New Roman">(314)
                621-3222</font></div>
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            <td align="left" valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                Illinois Public Service Company</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: Times New Roman">(Illinois
                Corporation)</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: Times New Roman">607
                East Adams Street</font></div>
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                523-3600</font></div>
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            <td align="left" valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                Energy Generating Company</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: Times New Roman">(Illinois
                Corporation)</font></div>
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                Chouteau Avenue</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: Times New Roman">St.
                Louis, Missouri 63103</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: Times New Roman">(314)
                621-3222</font></div>
            </td>
            <td align="left" valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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            </td>
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            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                Inc.</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: Times New Roman">(Illinois
                Corporation)</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: Times New Roman">300
                Liberty Street</font></div>
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                Illinois 61602</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: Times New Roman">(309)
                677-5271</font></div>
            </td>
            <td align="justify" valign="top" width="27%">
              <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: Times New Roman">37-1169387</font></div>
            </td>
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              <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: Times New Roman">1-2732</font></div>
            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                Illinois Light Company</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: Times New Roman">(Illinois
                Corporation)</font></div>
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                Illinois 61602</font></div>
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                677-5271</font></div>
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            <td align="justify" valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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            </td>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                Power Company</font></div>
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                Corporation)</font></div>
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                South Main Street </font></div>
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      the
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      satisfy the filing obligation of the registrant under any of the following
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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      1
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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      1.01
      Entry into a Material Definitive Agreement.</font></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="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;On
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      2006, the shareholders of Ameren Corporation (&#8220;Ameren&#8221;) approved the adoption by
      Ameren of a new incentive compensation plan, the 2006 Omnibus Incentive
      Compensation Plan (the &#8220;Plan&#8221;), at Ameren&#8217;s 2006 annual meeting of shareholders.
      The Plan was fully described in and appended to Ameren&#8217;s definitive proxy
      statement for its 2006 annual meeting of shareholders as filed with the
      Securities and Exchange Commission (&#8220;SEC&#8221;) pursuant to Section 14(a) of the
      Securities Exchange Act of 1934 (the &#8220;Exchange Act&#8221;), and is incorporated herein
      by reference to Exhibit 10.3 to the Current Report on Form 8-K filed on February
      16, 2006 (the &#8220;February 16, 2006 Form 8-K&#8221;) by Ameren and its subsidiaries,
      Union Electric Company, doing business as AmerenUE, Central Illinois Public
      Service Company, doing business as AmerenCIPS, Ameren Energy Generating Company,
      CILCORP Inc., Central Illinois Light Company, doing business as AmerenCILCO
      and
      Illinois Power Company, doing business as AmerenIP (collectively referred to
      as
      the &#8220;Registrants&#8221;).</font></div>
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    <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: Times New Roman"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;The
      Board of
      Directors of Ameren previously authorized the issuance pursuant to the Plan
      of
      performance share units to the chief executive officer and the four most highly
      compensated officers other than the chief executive officer (collectively,
      the
&#8220;Named Executive Officers&#8221;) of the Registrants, subject to shareholder approval
      of the Plan. As shareholder approval of the Plan has now been granted, the
      number of performance share units to be awarded to each Named Executive Officer
      pursuant to the Plan, as described in the February 16, 2006 Form 8-K and as
      set
      forth in Exhibit 10.1 thereto and incorporated herein by reference, have been
      issued. The form of performance share unit award attached as Exhibit 10.4 to
      the
      February 16, 2006 Form 8-K has been utilized to issue such awards, as more
      fully
      described therein, and is incorporated herein by reference.</font></div>
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      2
      - FINANCIAL INFORMATION</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: Times New Roman">ITEM
      2.02
      Results of Operations and Financial Condition.</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: Times New Roman"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;On
      May 4,
      2006, Ameren issued a press release announcing its earnings for the quarterly
      period ended March&#160;31, 2006. The press release is attached as Exhibit 99.1
      and is incorporated herein by reference. The information furnished pursuant
      to
      this Item 2.02, including Exhibit 99.1, shall not be deemed &#8220;filed&#8221; for purposes
      of </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>
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          2
          -</font></div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
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        </div>
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    <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"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Section
      18 of the Exchange Act or otherwise subject to the liabilities under that
      Section and shall not be deemed to be incorporated by reference into any filing
      of Ameren under the Securities Act of 1933 (the &#8220;Securities Act&#8221;) or the
      Exchange Act. </font></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="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;The
      information contained in Exhibit 99.2 shall be deemed filed for purposes of
      Section 18 of the Exchange Act and shall be deemed to be incorporated by
      reference into any filing of Ameren under the Securities Act or the Exchange
      Act.</font></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="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SECTION
      8</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>
      - </strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">OTHER
      EVENTS</font></div>
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    <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: Times New Roman">ITEM
      8.01
      Other Events.</font></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="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;In
      its press
      release dated May 4, 2006, Ameren disclosed the following unaudited consolidated
      financial statements: Statement of Income for the three months ended March
      31,
      2006 and March 31, 2005, Statement of Cash Flows for the three months ended
      March 31, 2006 and March 31, 2005, and Balance Sheet at March 31, 2006 and
      December 31, 2005. The foregoing unaudited consolidated financial statements
      are
      attached as Exhibit 99.2 and Ameren hereby incorporates such consolidated
      financial statements by reference into this Item 8.01 of this Current Report
      on
      Form 8-K.</font></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"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SECTION
      9</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>
      - </strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">FINANCIAL
      STATEMENTS AND EXHIBITS</font></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"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">ITEM
      9.01
      Financial Statements and Exhibits.</font></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"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(d)
      Exhibits</font></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: 144pt; TEXT-INDENT: -144pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Exhibit
      Number:</u></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Title:</u></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
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          <tr valign="top" style="line-height: 1.25;">
            <td style="width: 27pt;">&#160;</td>
            <td style="width: 126pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10.1</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">2006
                Omnibus Incentive Compensation Plan (incorporated herein by reference
                to&#160;Exhibit 10.3 to Registrants&#8217; Current Report on Form 8-K filed
                February 16, 2006).</font></div>
            </td>
          </tr>

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

          <tr valign="top" style="line-height: 1.25;">
            <td style="width: 27pt;">&#160;</td>
            <td style="width: 126pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10.2</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Table
                of 2005 Cash Bonus Awards and 2006 Performance Share Unit Awards
                Issued to
                Named Executive Officers (incorporated herein by reference to
                Exhibit&#160;10.1 to Registrants&#8217; Current Report on Form 8-K filed
                February 16, 2006).</font></div>
            </td>
          </tr>

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

          <tr valign="top" style="line-height: 1.25;">
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            <td style="width: 126pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10.3</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Form
                of Performance Share Unit Award Issued Pursuant to 2006 Omnibus Incentive
                Compensation Plan (incorporated herein by reference to Exhibit 10.4
                to
                Registrants&#8217; Current Report on Form 8-K filed February 16,
                2006).</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
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          <tr valign="top" style="line-height: 1.25;">
            <td style="width: 27pt;">&#160;</td>
            <td style="width: 126pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.1</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Press
                release regarding earnings for the quarterly period ended March 31,
                2006,
                issued on May 4, 2006 by Ameren
                Corporation.</font></div>
            </td>
          </tr>

      </table>
    </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">
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

            <tr valign="top" style="line-height: 1.25;">
              <td style="width: 27pt;">&#160;</td>
              <td style="width: 126pt;">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.2*</font></div>
              </td>
              <td>
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                  Corporation&#8217;s Unaudited Consolidated Statement of Income for the three
                  months ended March 31, 2006 and March 31, 2005, Consolidated Statement
                  of
                  Cash Flows for the three months ended March 31, 2006 and March
                  31, 2005
                  and Consolidated Balance Sheet at March 31, 2006 and December 31,
                  2005.</font></div>
              </td>
            </tr>

        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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    <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: Times New Roman"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;This
      combined
      Form 8-K is being filed separately by Ameren Corporation, Union Electric
      Company, Central Illinois Public Service Company, Ameren Energy Generating
      Company, CILCORP Inc., Central Illinois Light Company and Illinois Power Company
      (each a &#8220;registrant&#8221;). Information contained herein relating to any individual
      registrant has been filed by such registrant on its own behalf. No registrant
      makes any representation as to information relating to any other
      registrant.</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font size="2">*Exhibit
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br>Date:&#160;
May
                  4, 2006</div>
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      Index</u></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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            <td align="left" valign="top" width="16%" style="border-bottom: #ffffff thin solid;">
              <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: Times New Roman"><u>Exhibit
                No.</u></font></div>
            </td>
            <td align="left" valign="top" width="55%" style="border-bottom: #ffffff thin solid;">
              <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: 72pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Description</u></font></div>
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            <td align="left" valign="top" width="16%">
              <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: Times New Roman">10.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
                -</font></div>
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              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt">&#160;</div>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">2006
                Omnibus Incentive Compensation Plan (incorporated herein by reference
                to
                Exhibit 10.3 to Registrants&#8217; Current Report on Form 8-K filed February 16,
                2006).</font></div>
            </td>
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            <td align="left" valign="top" width="16%">
              <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: Times New Roman">10.2&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
                -</font></div>
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              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt">&#160;</div>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Table
                of 2005 Cash Bonus Awards and 2006 Performance Share Unit Awards
                Issued to
                Named Executive Officers (incorporated herein by reference to
                Exhibit&#160;10.1 to Registrants&#8217; Current Report on Form 8-K filed
                February 16, 2006).</font></div>
            </td>
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            <td align="left" valign="top" width="16%">
              <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: Times New Roman">10.3&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
                -</font></div>
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              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt">&#160;</div>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Form
                of Performance Share Unit Award Issued Pursuant to 2006 Omnibus Incentive
                Compensation Plan (incorporated herein by reference to Exhibit 10.4
                to
                Registrants&#8217; Current Report on Form 8-K filed February 16,
                2006).</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="16%">
              <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: Times New Roman">99.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;-</font></div>
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              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Press
                release regarding earnings for the quarterly period ended March 31,
                2006,
                issued on May 4, 2006 by Ameren Corporation.</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="16%">
              <div>&#160;</div>
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.2</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;-</div>
            </td>
            <td valign="top" width="55%">
              <div>&#160;</div>
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren
                Corporation's Unaudited Consolidated Statement of Income for the
                three
                months ended March 31, 2006 and March 31, 2005, Consolidated Statement
                of
                Cash Flows for the three months ended March 31, 2006 and March 31,
                2005
                and Consolidated Balance Sheet at March 31, 2006 and December 31,
                2005.</font></div>
            </td>
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        <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">&#160;</div>
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[{"type": "8-K", "sequence": "1", "filename": "subs8-k050406.htm", "description": "8-K FOR AMC SUBS 050406", "secsgml_size_bytes": 82961}]
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8-K for AMC Subs 050406
UNITED
      STATES
SECURITIES
      AND EXCHANGE COMMISSION
Washington,
      D.C. 20549
FORM
                8-K
CURRENT
      REPORT
Pursuant
      to Section 13 or 15(d) of the
Securities
      Exchange Act of 1934
Date
      of
      report (Date of earliest event reported):
May
                2 , 2006
Commission
                File Number
Exact
                Name of Registrant as Specified in Charter;
State
                of Incorporation;
Address
                and Telephone Number
IRS
                Employer
Identification
                Number
1-14756
Ameren
                Corporation
(Missouri
                Corporation)
1901
                Chouteau Avenue
St.
                Louis, Missouri 63103
(314)
                621-3222
43-1723446
1-2967
Union
                Electric Company
(Missouri
                Corporation)
1901
                Chouteau Avenue
St.
                Louis, Missouri 63103
(314)
                621-3222
43-0559760
1-3672
Central
                Illinois Public Service Company
(Illinois
                Corporation)
607
                East Adams Street
Springfield,
                Illinois 62739
(217)
                523-3600
37-0211380
333-56594
Ameren
                Energy Generating Company
(Illinois
                Corporation)
1901
                Chouteau Avenue
St.
                Louis, Missouri 63103
(314)
                621-3222
37-1395586
2-95569
CILCORP
                Inc.
(Illinois
                Corporation)
300
                Liberty Street
Peoria,
                Illinois 61602
(309)
                677-5271
37-1169387
1-2732
Central
                Illinois Light Company
(Illinois
                Corporation)
300
                Liberty Street
Peoria,
                Illinois 61602
(309)
                677-5271
37-0211050
1-3004
Illinois
                Power Company
(Illinois
                Corporation)
370
                South Main Street
Decatur,
                Illinois 62523
(217)
                424-6600
37-0344645
Check
      the
      appropriate box below if the Form 8-K filing is intended to simultaneously
      satisfy the filing obligation of the registrant under any of the following
      provisions:
[
      ] Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)
[
      ]
      Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)
[
      ]
      Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
      Act
      (17 CFR 240.14d-2(b))
[
      ]
      Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
      Act
      (17 CFR 240.13e-4(c))
SECTION
      1
      - REGISTRANT'S BUSINESS AND OPERATIONS
ITEM
      1.01
      Entry into a Material Definitive Agreement.
On
      May 2,
      2006, the shareholders of Ameren Corporation ("Ameren") approved the adoption by
      Ameren of a new incentive compensation plan, the 2006 Omnibus Incentive
      Compensation Plan (the "Plan"), at Ameren's 2006 annual meeting of shareholders.
      The Plan was fully described in and appended to Ameren's definitive proxy
      statement for its 2006 annual meeting of shareholders as filed with the
      Securities and Exchange Commission ("SEC") pursuant to Section 14(a) of the
      Securities Exchange Act of 1934 (the "Exchange Act"), and is incorporated herein
      by reference to Exhibit 10.3 to the Current Report on Form 8-K filed on February
      16, 2006 (the "February 16, 2006 Form 8-K") by Ameren and its subsidiaries,
      Union Electric Company, doing business as AmerenUE, Central Illinois Public
      Service Company, doing business as AmerenCIPS, Ameren Energy Generating Company,
      CILCORP Inc., Central Illinois Light Company, doing business as AmerenCILCO
      and
      Illinois Power Company, doing business as AmerenIP (collectively referred to
      as
      the "Registrants").
The
      Board of
      Directors of Ameren previously authorized the issuance pursuant to the Plan
      of
      performance share units to the chief executive officer and the four most highly
      compensated officers other than the chief executive officer (collectively,
      the
"Named Executive Officers") of the Registrants, subject to shareholder approval
      of the Plan. As shareholder approval of the Plan has now been granted, the
      number of performance share units to be awarded to each Named Executive Officer
      pursuant to the Plan, as described in the February 16, 2006 Form 8-K and as
      set
      forth in Exhibit 10.1 thereto and incorporated herein by reference, have been
      issued. The form of performance share unit award attached as Exhibit 10.4 to
      the
      February 16, 2006 Form 8-K has been utilized to issue such awards, as more
      fully
      described therein, and is incorporated herein by reference.
SECTION
      2
      - FINANCIAL INFORMATION
ITEM
      2.02
      Results of Operations and Financial Condition.
On
      May 4,
      2006, Ameren issued a press release announcing its earnings for the quarterly
      period ended March 31, 2006. The press release is attached as Exhibit 99.1
      and is incorporated herein by reference. The information furnished pursuant
      to
      this Item 2.02, including Exhibit 99.1, shall not be deemed "filed" for purposes
      of
-
          2
          -
Section
      18 of the Exchange Act or otherwise subject to the liabilities under that
      Section and shall not be deemed to be incorporated by reference into any filing
      of Ameren under the Securities Act of 1933 (the "Securities Act") or the
      Exchange Act.
The
      information contained in Exhibit 99.2 shall be deemed filed for purposes of
      Section 18 of the Exchange Act and shall be deemed to be incorporated by
      reference into any filing of Ameren under the Securities Act or the Exchange
      Act.
SECTION
      8
-
OTHER
      EVENTS
ITEM
      8.01
      Other Events.
In
      its press
      release dated May 4, 2006, Ameren disclosed the following unaudited consolidated
      financial statements: Statement of Income for the three months ended March
      31,
      2006 and March 31, 2005, Statement of Cash Flows for the three months ended
      March 31, 2006 and March 31, 2005, and Balance Sheet at March 31, 2006 and
      December 31, 2005. The foregoing unaudited consolidated financial statements
      are
      attached as Exhibit 99.2 and Ameren hereby incorporates such consolidated
      financial statements by reference into this Item 8.01 of this Current Report
      on
      Form 8-K.
SECTION
      9
-
FINANCIAL
      STATEMENTS AND EXHIBITS
ITEM
      9.01
      Financial Statements and Exhibits.
(d)
      Exhibits
Exhibit
      Number:
Title:
10.1
2006
                Omnibus Incentive Compensation Plan (incorporated herein by reference
                to Exhibit 10.3 to Registrants' Current Report on Form 8-K filed
                February 16, 2006).
10.2
Table
                of 2005 Cash Bonus Awards and 2006 Performance Share Unit Awards
                Issued to
                Named Executive Officers (incorporated herein by reference to
                Exhibit 10.1 to Registrants' Current Report on Form 8-K filed
                February 16, 2006).
10.3
Form
                of Performance Share Unit Award Issued Pursuant to 2006 Omnibus Incentive
                Compensation Plan (incorporated herein by reference to Exhibit 10.4
                to
                Registrants' Current Report on Form 8-K filed February 16,
                2006).
99.1
Press
                release regarding earnings for the quarterly period ended March 31,
                2006,
                issued on May 4, 2006 by Ameren
                Corporation.
99.2*
Ameren
                  Corporation's Unaudited Consolidated Statement of Income for the three
                  months ended March 31, 2006 and March 31, 2005, Consolidated Statement
                  of
                  Cash Flows for the three months ended March 31, 2006 and March
                  31, 2005
                  and Consolidated Balance Sheet at March 31, 2006 and December 31,
                  2005.
This
      combined
      Form 8-K is being filed separately by Ameren Corporation, Union Electric
      Company, Central Illinois Public Service Company, Ameren Energy Generating
      Company, CILCORP Inc., Central Illinois Light Company and Illinois Power Company
      (each a "registrant"). Information contained herein relating to any individual
      registrant has been filed by such registrant on its own behalf. No registrant
      makes any representation as to information relating to any other
      registrant.
________________________________
*Exhibit
      99.2 is intended to be deemed filed rather than
      furnished pursuant to General Instructions B.2 of Form 8-K.
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          3
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SIGNATURES
Pursuant
      to
      the requirements of the Securities Exchange Act of 1934, each registrant has
      duly caused this report to be signed on its behalf by the undersigned thereunto
      duly authorized. The signature for each undersigned company shall be deemed
      to
      relate only to matters having reference to such company or its
      subsidiaries.
AMEREN
                CORPORATION
(Registrant)
/s/
              Martin J. Lyons
Martin
              J. Lyons
Vice
                President and Controller
(Principal Accounting
                Officer)
UNION
                  ELECTRIC COMPANY
(Registrant)
/s/
                Martin J. Lyons
Martin
                J. Lyons
Vice
                  President and Controller
(Principal Accounting
                  Officer)
CENTRAL
                    ILLINOIS PUBLIC SERVICE COMPANY
(Registrant)
/s/
                  Martin J. Lyons
Martin
                  J. Lyons
Vice
                    President and Controller
(Principal Accounting
                    Officer)
AMEREN
                      ENERGY GENERATING COMPANY
(Registrant)
/s/
                    Martin J. Lyons
Martin
                    J. Lyons
Vice
                      President and Controller
(Principal Accounting
                      Officer)
CILCORP
                        Inc.
(Registrant)
/s/
                      Martin J. Lyons
Martin
                      J. Lyons
Vice
                        President and Controller
(Principal Accounting
                        Officer)
-
                  4
                  -
CENTRAL
                          ILLINOIS LIGHT COMPANY
(Registrant)
/s/
                        Martin J. Lyons
Martin
                        J. Lyons
Vice
                          President and Controller
(Principal Accounting
                          Officer)
ILLINOIS
                            POWER
                            COMPANY
(Registrant)
/s/
                          Martin J. Lyons
Martin
                          J. Lyons
Vice
                            President and Controller
(Principal Accounting
                            Officer)
Date: 
May
                  4, 2006
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                      5
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Exhibit
      Index
Exhibit
                No.
Description
10.1                                                             
                -
2006
                Omnibus Incentive Compensation Plan (incorporated herein by reference
                to
                Exhibit 10.3 to Registrants' Current Report on Form 8-K filed February 16,
                2006).
10.2                                                             
                -
Table
                of 2005 Cash Bonus Awards and 2006 Performance Share Unit Awards
                Issued to
                Named Executive Officers (incorporated herein by reference to
                Exhibit 10.1 to Registrants' Current Report on Form 8-K filed
                February 16, 2006).
10.3                                                             
                -
Form
                of Performance Share Unit Award Issued Pursuant to 2006 Omnibus Incentive
                Compensation Plan (incorporated herein by reference to Exhibit 10.4
                to
                Registrants' Current Report on Form 8-K filed February 16,
                2006).
99.1                                                              -
Press
                release regarding earnings for the quarterly period ended March 31,
                2006,
                issued on May 4, 2006 by Ameren Corporation.
99.2
-
Ameren
                Corporation's Unaudited Consolidated Statement of Income for the
                three
                months ended March 31, 2006 and March 31, 2005, Consolidated Statement
                of
                Cash Flows for the three months ended March 31, 2006 and March 31,
                2005
                and Consolidated Balance Sheet at March 31, 2006 and December 31,
                2005.
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              6
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