================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K/A (Amendment No. 1) FOR ANNUAL AND TRANSITION REPORTS PURSUANT TO SECTIONS 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2006 [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM _________________ TO __________________ COMMISSION FILE NUMBER 1-10235 IDEX CORPORATION (Exact Name of Registrant as Specified in its Charter) DELAWARE 36-3555336 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification No.) 630 DUNDEE ROAD, NORTHBROOK, ILLINOIS 60062 (Address of principal executive offices) (Zip Code) Registrant's telephone number: (847) 498-7070 SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: TITLE OF EACH CLASS NAME OF EACH EXCHANGE ON WHICH REGISTERED ------------------- ----------------------------------------- COMMON STOCK, NEW YORK STOCK EXCHANGE PAR VALUE $.01 PER SHARE AND CHICAGO STOCK EXCHANGE SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: NONE Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes [X] No [ ] Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes [ ] No [X] Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes [X] No [ ] Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [X] Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer or a non-accelerated filer. See definition of "accelerated filer and large accelerated filer" in Rule 12b-2 of the Exchange Act. Large accelerated filer [X] Accelerated filer [ ] Non-accelerated filer [ ] Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes [ ] No [X] The aggregate market value of the voting stock (based on the June 30, 2006 closing price of $47.20) held by non-affiliates of IDEX Corporation was $2,495,689,616. The number of shares outstanding of IDEX Corporation's common stock, par value $.01 per share (the "Common Stock"), as of February 15, 2007 was 53,823,941 (net of treasury shares). DOCUMENTS INCORPORATED BY REFERENCE None ================================================================================

EXPLANATORY NOTE This Amendment No. 1 to the Company's Annual Report on Form 10K for the year ended December 31, 2006 is being filed to amend Exhibit 13 to include language required by the New York Stock Exchange certification disclosures. As such, we have filed the following exhibits herewith: 13 The portions of IDEX Corporation's 2006 Annual Report to Shareholders, which are specifically incorporated by reference 31.1 Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31.2 Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 Except as described above, no other changes have been made to the original filing and this Form 10-K/A does not amend, update or change the financial statements or any other items or disclosures in the original filing. SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. IDEX CORPORATION By: /s/ DOMINIC A. ROMEO ------------------------------------------ Dominic A. Romeo Vice President and Chief Financial Officer Date: May 1, 2007 2

EXHIBIT 13 THE PORTIONS OF IDEX CORPORATION'S 2006 ANNUAL REPORT TO SHAREHOLDERS, WHICH ARE SPECIFICALLY INCORPORATED BY REFERENCE IDEX CORPORATION - -------------------------------------------------------------------------------- STOCKHOLDER INFORMATION CORPORATE OFFICE IDEX Corporation 630 Dundee Road Suite 400 Northbrook, Illinois 60062 USA 847.498.7070 INVESTOR INFORMATION Inquiries from shareholders and prospective investors should be directed to: Susan H. Fisher, Director--Investor Relations, at the Corporate Office (above). Further information may also be obtained at www.idexcorp.com. REGISTRAR AND TRANSFER AGENT Inquiries about stock transfers, address changes or IDEX's dividend reinvestment program should be directed to: National City Bank Shareholder Services 3rd Floor North Annex 4100 W. 150th Street Cleveland, Ohio 44135 800.622.6757 www.nationalcitystocktransfer.com Email: shareholder.inquiries@nationalcity.com INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Deloitte & Touche LLP 111 South Wacker Drive Chicago, Illinois 60606 DIVIDEND POLICY IDEX paid a quarterly dividend of $0.15 per share on its common stock on January 31, 2007. The declaration of future dividends is within the discretion of the Company's Board of Directors and will depend upon, among other things, business conditions, IDEX's earnings and financial condition. STOCK MARKET INFORMATION IDEX common stock was held by an estimated 6,700 shareholders at December 31, 2006, and is traded on the New York and Chicago Stock Exchanges under the ticker symbol IEX. PUBLIC FILINGS Shareholders may obtain a copy of any Form 10-K, 8-K, or 10-Q filed with the United States Securities and Exchange Commission by written request to the attention of Susan H. Fisher, Director--Investor Relations, at the Corporate Office (above) or through our website at www.idexcorp.com. ANNUAL MEETING The 2007 Annual Meeting of IDEX shareholders will be held on April 3, 2007, at 10:00 a.m. local time at: The Westin Chicago North Shore 601 North Milwaukee Avenue Wheeling, Illinois 60090 CERTIFICATIONS IDEX Corporation has included as Exhibit 31 to its Annual Report on Form 10-K for fiscal year 2006 filed with the Securities and Exchange Commission certificates of its Chief Executive Officer and Chief Financial Officer certifying the quality of IDEX Corporation's public disclosure. IDEX Corporation has also submitted to the New York Stock Exchange (NYSE) a certificate of its Chief Executive Officer certifying that he was not aware of any violation by IDEX Corporation of NYSE corporate governance listing standards as of the date of the certification. QUARTERLY STOCK PRICE

First Second Third Fourth ============================================================================== 2006 High $53.20 $53.48 $48.25 $49.29 Low 40.90 43.50 39.00 42.95 Close 52.17 47.20 43.05 47.41 - ------------------------------------------------------------------------------ 2005 High $42.13 $41.29 $45.33 $44.56 Low 36.50 36.62 38.65 39.14 Close 40.35 38.61 42.55 41.11
Brand names shown in this report are registered trademarks of IDEX Corporation and/or its subsidiaries.

EXHIBIT 31.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Lawrence D. Kingsley, certify that: 1. I have reviewed this annual report on Form 10-K/A of IDEX Corporation; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. IDEX CORPORATION By: /s/ LARRY D. KINGSLEY ------------------------------------------ Larry D. Kingsley Chairman and Chief Executive Officer May 1, 2007

EXHIBIT 31.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Dominic A. Romeo, certify that: 1. I have reviewed this annual report on Form 10-K/A of IDEX Corporation; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. IDEX CORPORATION By: /s/ DOMINIC A. ROMEO ------------------------------------------ Dominic A. Romeo Vice President and Chief Financial Officer May 1, 2007