SCHEDULE 14A
                               (Rule 14a-101)

                  INFORMATION REQUIRED IN PROXY STATEMENT

                          SCHEDULE 14A INFORMATION
        Proxy Statement Pursuant to Section 14(a) of the Securities
                   Exchange Act of 1934 (Amendment No. )

Filed by the Registrant [X]
Filed by a Party other than the Registrant [  ]

Check the appropriate box:
[ ]  Preliminary Proxy Statement            [  ]  Confidential, For Use of the
                                                  Commission Only (as permitted
                                                  by Rule 14a-6(e)(2))
[ ]  Definitive Proxy Statement
[X]  Definitive Additional Materials
[ ]  Soliciting Material Under Rule
     14a-12


                 Chicago Mercantile Exchange Holdings Inc.
                ------------------------------------------
              (Name of Registrant as Specified in Its Charter)

  --------------------------------------------------------------------------
  (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[X]   No fee required.
[ ]   Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and
      0-11.

      (1)   Title of each class of securities to which transaction applies:
      (2)   Aggregate number of securities to which transaction applies:
      (3)   Per unit price or other underlying value of transaction computed
            pursuant to Exchange Act Rule 0-11 (set forth the amount on
            which the filing fee is calculated and state how it was
            determined):
      (4)   Proposed maximum aggregate value of transaction:
      (5)   Total fee paid:

[ ]   Fee paid previously with preliminary materials:

[ ]   Check box if any part of the fee is offset as provided by Exchange
      Act Rule 0-11(a)(2) and identify the filing for which the offsetting
      fee was paid previously. Identify the previous filing by registration
      statement number, or the Form or Schedule and the date of its filing.

      (1)   Amount Previously Paid:
      (2)   Form, Schedule or Registration Statement No.:
      (3)   Filing Party:
      (4)   Date Filed:





         The following communication, dated April 12, 2002, was sent to the
Futures Industry Association:



                      CHICAGO MERCANTILE EXCHANGE INC.



                               April 12, 2002


Mr. John M. Damgard
President
Futures Industry Association
2001 Pennsylvania Avenue, N.W., Suite 600
Washington, D.C.  20006-1823

Dear Mr. Damgard:

Thank you for your letter dated April 5, 2002. I appreciate your concerns
and those of the FCM's that your organization represents. I can assure you
that I understand your issues. For many years, I held a substantial equity
position in a clearing firm and I am still involved in one.

Being on the Board of Directors is a responsibility that I fully respect
and one that I will do my utmost to fulfill for all the shareholders that I
represent.

                                            Sincerely,


                                            /s/ Tim Brennan
                                            Timothy R. Brennan
                                            CME Board Member


******
On March 12, 2002, Chicago Mercantile Exchange Holdings Inc. filed a
definitive proxy statement with the Securities and Exchange Commission
("SEC") regarding the Annual Meeting of Shareholders to be held on April
17, 2002. Shareholders of Chicago Mercantile Exchange Holdings Inc. are
urged to read the definitive proxy statement and any other relevant
materials filed by Chicago Mercantile Exchange Holdings Inc. with the SEC
because they contain, or will contain, important information about Chicago
Mercantile Exchange Holdings Inc. and the Annual Meeting. The definitive
proxy statement and other relevant materials (when they become available),
and any other documents filed by Chicago Mercantile Exchange Holdings Inc.
with the SEC, may be obtained free of charge at the SEC's web site at
www.sec.gov. In addition, shareholders may obtain free copies of these
documents by contacting Chicago Mercantile Exchange Holdings Inc.,
Shareholder Relations and Membership Services, 30 South Wacker Drive,
Chicago, Illinois 60606. Shareholders are urged to read the definitive
proxy statement and the other relevant materials (when they become
available) before making any voting decision with respect to matters to be
acted on at the Annual Meeting.

The preceeding letter was prepared and distributed solely by the candidate.
The views and opinions expressed therein are solely those of the candidate
and do not necessarily reflect the views or opinions of Chicago Mercantile
Exchange Holdings Inc. or its directors, officers or employees, nor have
these views or opinions been approved or sanctioned by any of them.