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) April 22, 2003 (April 22, 2003) CHICAGO MERCANTILE EXCHANGE HOLDINGS INC. ---------------------------------------------------------------------------- (Exact Name of Registrant as Specified in Charter) Delaware 001-31553 36-4459170 --------------- ----------------- --------------- (State or Other Jurisdiction (Commission (IRS Employer of Incorporation) File Number) Identification No.) 30 South Wacker Drive, Chicago, Illinois 60606 --------------------------------------------------- -------- (Address of Principal Executive Office) (Zip Code) Registrant's telephone number, including area code: (312) 930-1000 N/A --------------------------------------------------- (Former Name or Former Address, if Changed Since Last Report) ITEM 9. Regulation FD Disclosure. This information set forth under "Item 9. Regulation FD Disclosure" is intended to be furnished under Item 9 and also under "Item 12. Results Of Operations And Financial Condition" in accordance with SEC Release No. 33-8216. Such information, including the Exhibit attached hereto, shall not be deemed "filed" for purposes of Section 18 of the Securities Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such filing. Attached and incorporated herein by reference as Exhibit 99.1 is a copy of a press release of Chicago Mercantile Exchange Holdings Inc., dated April 22, 2003, reporting Chicago Mercantile Exchange Holdings Inc.'s financial results for the first quarter of 2003. EXHIBIT INDEX Exhibit Number Description ------ -------------- 99.1 Press Release, dated April 22, 2003. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. CHICAGO MERCANTILE EXCHANGE HOLDINGS INC. Registrant Date: April 22, 2003 By: /s/ Kathleen M. Cronin ------------------------------------ Kathleen M. Cronin Corporate Secretary