================================================================================ 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 13, 2005 IDEX CORPORATION (Exact Name of Registrant as Specified in its Charter) DELAWARE 1-10235 36-3555336 (State or other jurisdiction of (Commission (I.R.S. Employer incorporation or organization) File Number) Identification No.) 630 DUNDEE ROAD NORTHBROOK, ILLINOIS 60062 (Address of principal executive offices, including zip code) (847) 498-7070 (Registrant's telephone number) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: |_| Written communications pursuant to Rule 425 under the Securities Act (17CFR230.425) |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR240.14a-12) |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17CFR240.14d-2(b)) |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17CFR240.13e-4(c)) ================================================================================

ITEM 8.01 OTHER EVENTS On May 13, 2005, IDEX Corporation issued a press release announcing that Dennis K. Williams, the Company's chairman of the board, has adopted a prearranged trading plan, in accordance with the guidelines specified by Rule 10b5-1 under the Securities Exchange Act of 1934. A copy of this press release is filed as Exhibit 99.1 to this Current Report on Form 8-K. ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS Exhibits 99.1 Press release dated May 13, 2005

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. IDEX CORPORATION /s/ Dominic A. Romeo -------------------------- Dominic A. Romeo Vice President and Chief Financial Officer May 17, 2005

EXHIBIT 99.1 IDEX CORPORATION CHAIRMAN TO ADOPT 10b5-1 PLAN NORTHBROOK, IL, MAY 13, 2005 -- IDEX CORPORATION (NYSE: IEX) today announced that Dennis K. Williams, the company's chairman of the board, has adopted a prearranged trading plan, in accordance with the guidelines specified by Rule 10b5-1 under the Securities and Exchange Act of 1934, to sell up to 897,300 option shares of IDEX common stock over the next 12 months. As previously announced, Mr. Williams retired as the company's president and chief executive officer in March 2005 and will continue to serve as chairman of the board through the later of March 31, 2006 or the date of the company's 2006 annual meeting, at which time he plans to retire from the company and its Board of Directors. Within 30 days of his retirement from the Board of Directors, the stock options granted to Mr. Williams during his tenure as president and chief executive officer will expire. The trading plan is designed to allow Mr. Williams to exercise his options in an orderly fashion over the next approximately 12 months. ABOUT IDEX CORPORATION IDEX Corporation is the world leader in fluid-handling technologies for positive displacement pumps and metering products, dispensing equipment for color formulation, and other highly engineered products including fire suppression equipment, rescue tools and stainless steel band clamping systems. Its products are sold in niche markets to a wide range of industries throughout the world. IDEX shares are traded on the New York Stock Exchange and Chicago Stock Exchange under the symbol "IEX." FOR FURTHER INFORMATION ON IDEX CORPORATION AND ITS BUSINESS UNITS, VISIT THE COMPANY'S WEB SITE AT www.idexcorp.com.