The following is a summary of information presented in more detail in the Notice, which Class Members should have received in the mail, and which you can access by clicking the box on the left. Since this is just a summary, you should read the full Notice for additional details.

PLEASE READ THIS INFORMATION CAREFULLY. IF YOU PURCHASED OR OTHERWISE ACQUIRED MMC SECURITIES BETWEEN OCTOBER 14, 1999 AND OCTOBER 13, 2004, INCLUSIVE, YOUR RIGHTS MAY BE AFFECTED BY THESE PROCEEDINGS AND YOU MAY BE ENTITLED TO RECEIVE BENEFITS UNDER A PROPOSED $400,000,000 CLASS ACTION SETTLEMENT.

THE COURT’S SETTLEMENT FAIRNESS HEARING

The Court will hold a hearing on December 23, 2009, at 11:00 a.m., at the United States District Court for the Southern District of New York, United States Courthouse, Room 14C, 500 Pearl Street, New York, NY 10007. At this hearing, the Court will consider whether the proposed Settlement is fair, reasonable and adequate. If there are objections, the Court will consider them. The Court will listen to people who have asked to speak at the hearing. The Court will also decide whether to approve the payment of fees and expenses to Lead Counsel, including the awards to Lead Plaintiffs and the Plan of Allocation.

WHAT IS THIS CASE ABOUT?

Lead Plaintiffs allege that Defendants made false and misleading statements in MMC’s public filing and other public communications. Lead Plaintiffs’ claims arise out of the practice in the insurance brokerage industry of brokers charging and collecting so-called “contingent commissions” from insurers. Lead Plaintiffs allege that the existence of a certain type of contingent commissions created incentives for Marsh Inc. (“Marsh”), the insurance brokerage subsidiary of MMC, to engage in various improper practices to maximize Marsh’s contingent commission revenue. Lead Plaintiffs claim that the Defendants violated federal securities law by misrepresenting the nature of Marsh’s contingent commission revenue and by failing to disclose the allegedly improper practices by Marsh that increased that revenue. Lead Plaintiffs allege that upon disclosure of information correcting the prior misrepresentations and omissions, the price of MMC stock dropped, causing damages to Lead Plaintiffs and the Class.

Defendants have denied and continue to deny all claims asserted against them. Defendants assert that at all times they made no material misrepresentations or omissions. Defendants continue to deny liability and deny that Lead Plaintiffs and the Class were damaged.

THE SETTLEMENT BENEFITS

MMC has agreed to pay $400,000,000 in cash to settle this case (the “Settlement Fund”). The Settlement Fund will be placed into a bank account that will earn interest. The Settlement Fund, plus interest, minus taxes, costs, fees and expenses (the “Net Settlement Fund”), will be divided among all eligible Class Members who send in valid Proof of Claim forms.

THE OPTIONS AVAILABLE TO CLASS MEMBERS UNDER THIS SETTLEMENT

If you are a Class Member, you have the following options:

• FILE A PROOF OF CLAIM AND RELEASE FORM
  To qualify to get money from the proposed Settlement, you must timely send in a completed Proof of Claim and Release form with supporting documents (DO NOT SEND ORIGINALS) to the Claims Administrator. At the link on the left, you may get a Proof of Claim and Release form. Please read the instructions carefully, fill out the Proof of Claim and Release form, include all the documents the form asks for, sign it, and mail it to the Claims Administrator by first class mail, postmarked no later than February 22, 2010. The Claims Administrator needs all of the information requested in the Proof of Claim and Release in order to determine what you may be entitled to.
  
  
• EXCLUDE YOURSELF FROM THE CLASS
  If you exclude yourself from the Class, you will not get any money from the proposed Settlement. You will no longer be part of the Class, and nothing that happens in the lawsuit will affect you. You will not be bound by the proposed Settlement and may be able to sue MMC on your own. To exclude yourself from the Class, you must send a written letter stating:
  
  
  • You want to be excluded from the Settlement in In re Marsh & McLennan Companies, Inc. Securities Litigation, Civil Action No. 04-CV-08144;
  • Your name, address, and telephone number;
  • The number of shares you purchased or sold during the Class Period; the dates you purchased or sold the shares; and the price you paid for the shares; and
  • The statement must be signed.
  
  Your exclusion request must be received by no later than 5:00 p.m. Eastern Time on December 14, 2009. Your exclusion request can be sent to the Claims Administrator by the following methods:
  
  
  • Email your request to: info@MMCSecuritiesLitigation.com
  • Overnight mail or hand delivery to:
    

    MMC Securities Litigation c/o Rust Consulting, Inc. 201 S. Lyndale Avenue Faribault, MN 55021

    
    
  • Fax your request to (561) 651-7788.
  
  You cannot exclude yourself from the Class by phone.
  
  
• OBJECT TO THE SETTLEMENT
  If you are a Class Member, you may object to the Settlement, any part of it, or the request for attorneys’ fees and reimbursement of expenses and state why you think the Court should not approve the Settlement. You can only object if you do not exclude yourself from the Class.
  
  To object, you must send a written objection stating:
  
  
  • You object to the Settlement in In re Marsh & McLennan Companies, Inc. Securities Litigation, Civil Action No. 04-CV-08144;
    
    
  • Your name, address, and telephone number;
    
    
  • Proof of the number of MMC securities that you purchased and sold during the Class Period;
    
    
  • The reasons why you are objecting to the Settlement; and
    
    
  • The objection must be signed.
  
  The objection must be received by no later than 5:00 p.m. Eastern Time on December 14, 2009 by the Court, Lead Counsel and Defendants’ Counsel at the addresses listed on page 8, Question 17 of the Notice.
  
  If you have submitted an objection to the Settlement and want to speak at the Settlement Fairness Hearing or have your own attorney speak for you, at your own expense, follow the instructions on page 9, Question 21 of the Notice.
  
  Note: The Court may change the date and time of the Settlement Fairness Hearing. You should check with Lead Counsel to be sure the date and/or time has not changed.

FURTHER INFORMATION

Further information regarding the Settlement, the Notice of Proposed Settlement of Class Action and how to file your claim may be obtained by contacting the Claims Administrator or reading through the Notice of Proposed Settlement of Class Action and Proof of Claim and Release links on the left. You may also contact Lead Counsel at the address listed on the Contact Information link on the left.