Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
ROMEO DOMINIC A
   2. Issuer Name and Ticker or Trading Symbol
IDEX CORP /DE/ [IEX] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP and CFO
(Last)
(First)
(Middle)
3. Date of Earliest Transaction (Month/Day/Year)
02/08/2011
(Street)

 		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
COMMON STOCK 02/10/2011   S   40,000 D $ 41.6863 20,765 D  
COMMON STOCK 02/08/2011   M   18,750 A $ 26.9 39,515 D  
COMMON STOCK 02/08/2011   S   18,750 D $ 41.0061 20,765 D  
COMMON STOCK 02/08/2011   M   15,000 A $ 28.31 35,765 D  
COMMON STOCK 02/08/2011   S   15,000 D $ 41.0061 20,765 D  
COMMON STOCK 02/08/2011   M   22,500 A $ 34.18 43,265 D  
COMMON STOCK 02/08/2011   S   22,500 D $ 41.0061 20,765 D  
COMMON STOCK 02/08/2011   M   19,750 A $ 34.03 40,515 D  
COMMON STOCK 02/08/2011   S   19,750 D $ 41.0061 20,765 D  
COMMON STOCK 02/09/2011   M   5,270 A $ 34.03 26,035 D  
COMMON STOCK 02/09/2011   S   5,270 D $ 41.1006 20,765 D  
COMMON STOCK 02/09/2011   M   35,000 A $ 32.95 55,765 D  
COMMON STOCK 02/09/2011   S   35,000 D $ 41.1006 20,765 D  
COMMON STOCK 02/09/2011   M   30,750 A $ 19.98 51,515 D  
COMMON STOCK 02/09/2011   S   30,750 D $ 41.1006 20,765 D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
OPTIONS (RIGHT TO BUY) $ 31.77 12/21/2010   D     36,850 (1) 03/02/2011(1) 03/02/2020(1) COMMON STOCK 36,850 (1) $ 0 147,020 (1) D  
OPTIONS (RIGHT TO BUY) $ 26.9 02/08/2011   M     18,750 03/22/2006 03/22/2015 COMMON STOCK 18,750 $ 0 128,270 D  
OPTIONS (RIGHT TO BUY) $ 28.31 02/08/2011   M     15,000 09/27/2006 09/27/2015 COMMON STOCK 15,000 $ 0 113,270 D  
OPTIONS (RIGHT TO BUY) $ 34.18 02/08/2011   M     22,500 04/04/2007 04/04/2016 COMMON STOCK 22,500 $ 0 90,770 D  
OPTIONS (RIGHT TO BUY) $ 34.03 02/08/2011   M     19,750 04/04/2008 04/04/2017 COMMON STOCK 19,750 $ 0 71,020 D  
OPTIONS (RIGHT TO BUY) $ 34.03 02/09/2011   M     5,270 04/04/2008 04/04/2017 COMMON STOCK 5,270 $ 0 65,750 D  
OPTIONS (RIGHT TO BUY) $ 32.95 02/09/2011   M     35,000 04/04/2009 04/04/2018 COMMON STOCK 35,000 $ 0 30,750 D  
OPTIONS (RIGHT TO BUY) $ 19.98 02/09/2011   M     30,750 02/24/2010 02/24/2019 COMMON STOCK 30,750 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
ROMEO DOMINIC A

 		       VP and CFO  

Signatures

 DOMINIC A. ROMEO   02/10/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) SURRENDERED IN CONNECTION WITH FEBRUARY 28, 2011 RETIREMENT ARRANGEMENTS.

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