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 *
ENGEL FERDINAND
   2. Issuer Name and Ticker or Trading Symbol
CONCORD COMMUNICATIONS INC [CCRD] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP Engineering & CTO
(Last)
(First)
(Middle)
C/O CONCORD COMMUNICATIONS, INC., 600 NICKERSON ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
06/07/2005
(Street)

MARLBORO, MA 01752		 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 06/07/2005   D   43,320 D $ 17 (1) 0 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
Employee Stock Option (Right to Buy) $ 19 06/07/2005   D     10,200 06/07/2005(2) 10/29/2005 Common Stock 10,200 $ 0 (2) 0 D  
Employee Stock Option (Right to Buy) $ 19 06/07/2005   D     5,426 06/07/2005(3) 10/29/2005 Common Stock 5,426 $ 0 (3) 0 D  
Employee Stock Option (Right to Buy) $ 23.5 06/07/2005   D     3,125 06/07/2005(4) 04/29/2006 Common Stock 3,125 $ 0 (4) 0 D  
Employee Stock Option (Right to Buy) $ 23.5 06/07/2005   D     15,625 06/07/2005(5) 04/29/2006 Common Stock 15,625 $ 0 (5) 0 D  
Employee Stock Option (Right to Buy) $ 9.34 06/07/2005   D     2,500 06/07/2005(6) 07/18/2009 Common Stock 2,500 $ 0 (6) 0 D  
Employee Stock Option (Right to Buy) $ 13.05 06/07/2005   D     1,148 06/07/2005(7) 11/14/2009 Common Stock 1,148 $ 0 (7) 0 D  
Employee Stock Option (Right to Buy) $ 13.05 06/07/2005   D     1,978 06/07/2005(8) 11/14/2009 Common Stock 1,978 $ 0 (8) 0 D  
Employee Stock Option (Right to Buy) $ 9.01 06/07/2005   D     10,000 06/07/2005(9) 12/20/2010 Common Stock 10,000 $ 0 (9) 0 D  
Employee Stock Option (Right to Buy) $ 9.01 06/07/2005   D     7,500 06/07/2005(10) 12/20/2010 Common Stock 7,500 $ 0 (10) 0 D  
Employee Stock Option (Right to Buy) $ 14.65 06/07/2005   D     7,500 06/07/2005(11) 10/08/2011 Common Stock 7,500 $ 0 (11) 0 D  
Employee Stock Option (Right to Buy) $ 14.65 06/07/2005   D     30,000 06/07/2005(12) 10/08/2011 Common Stock 30,000 $ 0 (12) 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
ENGEL FERDINAND
C/O CONCORD COMMUNICATIONS, INC.
600 NICKERSON ROAD
MARLBORO, MA 01752		       EVP Engineering & CTO  

Signatures

 /s/ Douglas A. Batt, Pursuant to a Power of Attorney   06/09/2005
**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) Disposed of pursuant to the merger agreement between Concord Communications and Computer Associates in exchange for the right to receive $17.00 per share
(2) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 6,380 shares of Computer Associates' common stock for $30.38 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(3) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 3,393 shares of Computer Associates' common stock for $30.38 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(4) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 1,954 shares of Computer Associates' common stock for $37.57 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(5) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 9,773 shares of Computer Associates' common stock for $37.57 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(6) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 1,563 shares of Computer Associates' common stock for $14.94 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(7) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 718 shares of Computer Associates' common stock for $20.87 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(8) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 1,237 shares of Computer Associates' common stock for $20.87 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(9) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 6,255 shares of Computer Associates' common stock for $14.41 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(10) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 4,691 shares of Computer Associates' common stock for $14.41 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(11) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 4,691 shares of Computer Associates' common stock for $23.43 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications
(12) This option was assumed by Computer Associates in the merger and replaced with an option to purchase 18,765 shares of Computer Associates' common stock for $23.43 per share. In accordance with the Amendment and Restated Management Change in Control Agreement between Mr. Engel and Concord Communications, this option became fully vested upon the consumation of Computer Associates' acquisition of Concord Communications

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