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 *
HERVEY GEORGE
   2. Issuer Name and Ticker or Trading Symbol
MARVELL TECHNOLOGY GROUP LTD [MRVL] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Financial Officer
(Last)
(First)
(Middle)
700 FIRST AVENUE		 3. Date of Earliest Transaction (Month/Day/Year)
01/13/2005
(Street)

SUNNYVALE, CA 94089		 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 01/13/2005   M   3,000 A $ 5 46,763 D  
Common Stock 01/13/2005   S   3,000 D $ 35 43,763 D  
Common Stock 01/14/2005   M   6,000 A $ 5 49,763 D  
Common Stock 01/14/2005   S   6,000 D $ 35.03 43,763 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) $ 5 01/13/2005   M     3,000   (1) 05/08/2010 Common Stock 245,800 $ 0 245,800 D  
Employee Stock Option (Right to Buy) $ 5 01/14/2005   M     6,000   (1) 05/08/2010 Common Stock 239,800 $ 0 239,800 D  
Employee Stock Option (Right to Buy) $ 10.6875               (2) 01/02/2011 Common Stock 80,000   80,000 D  
Employee Stock Option (Right to Buy) $ 15.345               (3) 02/28/2012 Common Stock 80,000   80,000 D  
Employee Stock Option (Right to Buy) $ 6.935               (4) 10/16/2012 Common Stock 140,000   140,000 D  
Employee Stock Option (Right to Buy) $ 12.37               (5) 05/05/2013 Common Stock 100,000   100,000 D  
Stock Option (Right to Buy) $ 18.95               (6) 01/02/2014 Common Stock 140,000   140,000 D  
Stock Option (Right to Buy) $ 22.475               (7) 04/16/2014 Common Stock 17,840   17,840 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
HERVEY GEORGE
700 FIRST AVENUE
SUNNYVALE, CA 94089		       Chief Financial Officer  

Signatures

 George Hervey   01/14/2005
**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) This option becomes exerciseable as it vests as follows: Vests 20% on 04/26/01 and 25,334 shares per month beginning 05/26/01 until 04/26/05.
(2) Of such 80,000 shares, vests 25% on 01/02/02 and 1,666 shares per month beginning 02/02/02 until 01/02/05; Options become exerciseable as they vest.
(3) Of such 80,000 shares, vests 25% on 02/03/03, 16,666 shares on 12/03/03 and 1,666 shares per month beginning 01/03/04 until 02/03/06; Options become exerciseable as they vest.
(4) Of such 140,000 shares, vests 140,000 shares on 10/16/07; Options become exerciseable as they vest.
(5) Of such 100,000 shares, vests 100,000 shares on 05/05/06; Options become exerciseable as they vest.
(6) Of such 140,000 shares, vests 140,000 shares on 01/02/08; Options become exerciseable as they vest.
(7) Of such 17,840 shares, all shares are fully vested and exerciseable on 04/16/04.

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