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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font SIZE=2>UNITED STATES</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font SIZE=2>SECURITIES AND EXCHANGE COMMISSION</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Washington, D.C. 20549</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>_____________________</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font SIZE=2>FORM 8-K</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font SIZE=2>CURRENT REPORT</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Pursuant to Section 13 or 15(d) of the </font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Securities Exchange Act of 1934</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="459" style='border-collapse:collapse'>
    <tr >
        <td width="336" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Date of report (Date of earliest event reported)</font></p> </td>
        <td width="123" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><font size=2>March 16, 2005</font></u></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="97%" style='border-collapse:collapse'>
    <tr >
        <td  width="1">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td>
        <td width="624" valign=top style='border-bottom:solid black 1.0pt; padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Marsh &amp; McLennan Companies, Inc.</font></p> </td> </tr>
    <tr >
        <td  colspan="2" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>(Exact Name of Registrant as Specified in Charter)</font></p> </td> </tr>
    <tr>
        <td width="1" ></td>

        <td width="624" ></td> </tr> </table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="625" style='border-collapse:collapse'>
    <tr >
        <td width="197" valign=top style='border-bottom:solid black 1.0pt; padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Delaware</font></p> </td>
        <td width="197" valign=top style='border-bottom:solid black 1.0pt; padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:60.0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>1-5998</font></p> </td>
        <td width="232" valign=top style='border-bottom:solid black 1.0pt; padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:59.25pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>36-2668272</font></p> </td> </tr>
    <tr >
        <td width="197" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>(State or Other Jurisdiction of Incorporation)</font></p> </td>
        <td width="197" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>(Commission File Number)</font></p> </td>
        <td width="232" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>(IRS Employer</font><br> <font size=2>Identification No.)</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="625" style='border-collapse:collapse'>
    <tr >
        <td width="625" valign=top style='border-bottom:solid black 1.0pt; padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:15.0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>1166 Avenue of the Americas, New York, NY                                       10036</font></p> </td> </tr></table>

<table border="0" cellspacing=0 cellpadding=0 width="535" style='margin-left:12.0pt;border-collapse:collapse'>
    <tr >
        <td width="444" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>(Address of Principal Executive Offices)</font></p> </td>
        <td width="91" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>(Zip Code)</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="468" style='border-collapse:collapse'>
    <tr >
        <td width="348" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Registrant&#146;s telephone number, including area code</font></p> </td>
        <td width="120" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><font size=2>(212) 345-5000</font></u></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:left;'><font size=2>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:</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table  border="0" cellspacing=0 cellpadding=0 style='margin-left:27.35pt;border-collapse:collapse'>
    <tr >
        <td width="24" valign=top style='padding:0in 0in 3.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=4><b>&#149;</b></font></p> </td>
        <td  valign=top style='padding:0in 0in 3.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</font></p> </td> </tr>
    <tr >
        <td width="24" valign=top style='padding:0in 0in 3.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=4><b>&#149;</b></font></p> </td>
        <td  valign=top style='padding:0in 0in 3.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></p> </td> </tr>
    <tr >
        <td width="24" valign=top style='padding:0in 0in 3.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=4><b>&#149;</b></font></p> </td>
        <td  valign=top style='padding:0in 0in 3.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</font></p> </td> </tr>
    <tr >
        <td width="24" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=4><b>&#149;</b></font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font><br clear=all style='page-break-before:always'> </p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style='page-break-before:always'></p>
<pAGE>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Section 5&#151;Corporate Governance and Management</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><b><font size=2>Item 5.03.  Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:left;'><font size=2>On March 16, 2005, the Board of Directors of Marsh &amp; McLennan Companies, Inc. (&#147;MMC&#148;) adopted a resolution to amend the MMC By-Laws to clarify that notice of stockholder meetings may be delivered by electronic means. A copy of the amended By-Laws is attached as an exhibit hereto. </font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Section 9&#151;Financial Statements and Exhibits</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><b><font size=2>Item 9.01.  Financial Statements and Exhibits.</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="363" style='margin-left:.5in;border-collapse:collapse'>
    <tr >
        <td width="99" valign=top >
            <p ><font size=2>(c)  Exhibits</font></p></td>
        <td  width="264">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
    <tr >
        <td  colspan="2" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>3.1  MMC By-Laws, as amended on March 16, 2005.</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="28" style='margin-left:213.0pt;border-collapse:collapse'>
    <tr >
        <td width="28" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>2</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style='page-break-before:always'></p>
<pAGE>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font SIZE=2>SIGNATURES</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:left;'><font size=2>Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:right;'><font size=2>MARSH &amp; McLENNAN COMPANIES, INC.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:right;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="45%" style='margin-left:203.4pt;border-collapse:collapse'>
    <tr >
        <td width="36" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0in;text-indent:0pt;text-align:left;margin-top:1.0pt;margin-bottom: 0in'><font size=2>By:</font></p> </td>
        <td width="256" valign=bottom style='border-bottom: solid black 1.0pt; padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:1.5pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>/s/ Bart Schwartz</font></p> </td> </tr></table>

<table border="0" cellspacing=0 cellpadding=0 width="225" style='margin-left:225.0pt;border-collapse:collapse'>
    <tr >
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Name:</font></p> </td>
        <td width="109" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Bart Schwartz</font></p> </td>
        <td  width="68">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
    <tr >
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Title:</font></p> </td>
        <td  colspan="2" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Deputy General Counsel</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.75in;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:2.88in;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:2.88in;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="169" style='margin-left:.5in;border-collapse:collapse'>
    <tr >
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Date:</font></p> </td>
        <td width="121" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>March 21, 2005</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:0.75in;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>3</font></p>

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{"company-data": {"conformed-name": "MARSH & MCLENNAN COMPANIES, INC.", "cik": "0000062709", "assigned-sic": "6411", "irs-number": "362668272", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-05998", "film-number": "05694964"}, "business-address": {"street1": "1166 AVENUE OF THE AMERICAS", "city": "NEW YORK", "state": "NY", "zip": "10036", "phone": "2123455000"}, "mail-address": {"street1": "1166 AVENUE OF THE AMERICAS", "city": "NEW YORK", "state": "NY", "zip": "10036"}, "former-company": [{"former-conformed-name": "MARSH & MCLENNAN COMPANIES INC", "date-changed": "19920703"}, {"former-conformed-name": "MARLENNAN CORP", "date-changed": "19760505"}]}
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)
March 16, 2005
Marsh & McLennan Companies, Inc.
(Exact Name of Registrant as Specified in Charter)
Delaware
1-5998
36-2668272
(State or Other Jurisdiction of Incorporation)
(Commission File Number)
(IRS Employer
Identification No.)
1166 Avenue of the Americas, New York, NY                                       10036
(Address of Principal Executive Offices)
(Zip Code)
Registrant's telephone number, including area code
(212) 345-5000
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 5—Corporate Governance and Management
Item 5.03.  Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.
On March 16, 2005, the Board of Directors of Marsh & McLennan Companies, Inc. ("MMC") adopted a resolution to amend the MMC By-Laws to clarify that notice of stockholder meetings may be delivered by electronic means. A copy of the amended By-Laws is attached as an exhibit hereto.
Section 9—Financial Statements and Exhibits
Item 9.01.  Financial Statements and Exhibits.
(c)  Exhibits
3.1  MMC By-Laws, as amended on March 16, 2005.
2
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
MARSH & McLENNAN COMPANIES, INC.
By:
/s/ Bart Schwartz
Name:
Bart Schwartz
Title:
Deputy General Counsel
Date:
March 21, 2005
3