Sec Form 4 Filing - HAASER CHARLES B @ ABIOMED INC - 2006-05-31

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 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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1. Name and Address of Reporting Person HAASER CHARLES B 2. Issuer Name and Ticker or Trading Symbol ABIOMED INC [ ABMD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Principal Accounting Officer (Last) (First) (Middle) C/O ABIOMED, INC., 22 CHERRY HILL DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 05/31/2006 (Street) DANVERS, MA01923 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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, $.01 par value 2,379 D Common Stock, $.01 par value 05/31/2006 M 1,500 A $ 5.11 3,879 D Common Stock, $.01 par value 05/31/2006 S 1,500 D $ 13.364 2,379 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Exercis able Expiration Date Title Amount or Number of Shares Stock Option (right to buy) ( 2 ) $ 6.688 07/01/2001( 1 ) 07/01/2009 Common Stock 1,400 1,400 D Stock Option (right to buy) ( 3 ) $ 15.563 06/28/2002( 5 ) 06/28/2010 Common Stock 10,000 10,000 D Stock Option (right to buy) ( 4 ) $ 18.4 08/08/2003( 6 ) 08/08/2011 Common Stock 5,000 5,000 D Stock Option (right to buy) ( 4 ) $ 6.75 06/25/2004( 7 ) 06/25/2012 Common Stock 5,000 5,000 D Stock Option (right to buy) ( 4 ) $ 12.3 07/01/2005( 9 ) 07/01/2014 Common Stock 15,000 15,000 D Stock Option (right to buy) ( 4 ) $ 10.8 03/01/2006( 9 ) 03/01/2015 Common Stock 12,500 $ 12,500 D Stock Option (right to buy) ( 4 ) $ 9.36 06/08/2006( 9 ) 06/08/2015 Common Stock 20,000 20,000 D Stock Option(right to buy) ( 3 ) $ 5.11 05/31/2006 M 1,500 06/25/2005( 8 ) 06/25/2013 Common Stock 5,000 $ 5.11 3,500 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other HAASER CHARLES B C/O ABIOMED, INC. 22 CHERRY HILL DRIVE DANVERS, MA01923 Principal Accounting Officer Signatures /s/ Charles B. Haaser 06/02/2006 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Thirty percent of the original option grant became exercisable on 7/1/01 and were subsequently exercised. Another 30 percent became exercisable on 7/1/02 and an additional 40 percent will become exercisable on 7/1/03. ( 2 )Grant to reporting person of option to buy the number of shares of Common Stock set forth in Table II, Column 7, under the ABIOMED, Inc. 1992 Combination Stock Option Plan. ( 3 )Grant to reporting person of option to buy the number of shares of Common Stock set forth in Table II, Column 7, under the ABIOMED, Inc. 1998 Equity Incentive Plan. ( 4 )Grant to reporting person of option to buy the number of shares of Common Stock set forth in Table II, Column 7, under the ABIOMED, Inc. 2000 Stock Incentive Plan. ( 5 )Thirty percent of this option will become exercisable on each of 6/28/02 and 6/28/03 and an additional 40 percent will become exercisable on 6/28/04. ( 6 )Thirty percent of this option will become exercisable on each of 8/8/03 and 8/8/04 and an additional 40 percent will become exercisable on 8/8/05. ( 7 )Thirty percent of this option will become exercisable on each of 6/25/04 and 6/25/05 and an additional 40 percent will become exercisable on 6/25/06. ( 8 )Thirty percent of this option will become exercisable on each of 6/25/05 and 6/25/06 and an additional 40 percent will become exercisable on 6/25/07. ( 9 )These options become exercisable in annual 25% increments, commencing on the date shown in Table II, Column 6.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* 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).

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