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 *
PAPADOPOULOS GREGORY M
   2. Issuer Name and Ticker or Trading Symbol
SUN MICROSYSTEMS, INC. [SUNW] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Vice President & CTO
(Last)
(First)
(Middle)
4150 NETWORK CIRCLE		 3. Date of Earliest Transaction (Month/Day/Year)
07/27/2006
(Street)

SANTA CLARA, CA 95054		 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 07/28/2006   F   38,515 D $ 4.33 242,702 (15) 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) (1) $ 5.0235             04/15/1999(2) 04/15/2008 Common Stock 106,000   106,000 D  
Employee Stock Option (Right to Buy) (1) $ 12.5313             04/20/2000(3) 04/20/2009 Common Stock 100,000   100,000 D  
Employee Stock Option (Right to Buy) (1) $ 40             04/12/2001(4) 04/12/2010 Common Stock 51,676   51,676 D  
Employee Stock Option (Right to Buy) (1) $ 18.58             04/18/2002(5) 04/18/2011 Common Stock 111,686   111,686 D  
Employee Stock Option (Right to Buy) (1) $ 12.59             11/07/2002(6) 11/07/2011 Common Stock 39,211   39,211 D  
Employee Stock Option (Right to Buy) (1) $ 12.59             11/07/2002(7) 11/07/2011 Common Stock 44,785   44,785 D  
Employee Stock Option (Right to Buy) (1) $ 9.14             03/19/2003(8) 03/19/2010 Common Stock 125   125 D  
Employee Stock Option (Right to Buy) (1) $ 6.45             05/02/2003(9) 05/02/2012 Common Stock 126,974   126,974 D  
Employee Stock Option (Right to Buy) (1) $ 3.7             07/25/2003(10) 07/25/2012 Common Stock 197,713   197,713 D  
Employee Stock Option (Right to Buy) (1) $ 3.85             07/23/2004(11) 07/23/2013 Common Stock 399,152   399,152 D  
Employee Stock Option (Right to Buy) (1) $ 3.79             07/29/2005(12) 07/29/2014 Common Stock 400,000   400,000 D  
Employee Stock Option (Right to Buy) (1) $ 3.85             07/28/2006(13) 07/28/2015 Common Stock 300,000   300,000 D  
Employee Stock Option (Right to Buy) (1) $ 4.26 07/27/2006   A   500,000   07/27/2007(14) 07/27/2016 Common Stock 500,000 $ 4.26 500,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
PAPADOPOULOS GREGORY M
4150 NETWORK CIRCLE
SANTA CLARA, CA 95054		       Executive Vice President & CTO  

Signatures

 /s/ Gregory M. Papadopoulos   07/31/2006
**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 was granted under the Sun Microsystems, Inc. 1990 Long-Term Equity Incentive Plan.
(2) This option vests and becomes exercisable in five equal annual installments of 58,800 shares beginning on April 15, 1999.
(3) This option vests and becomes exercisable in five equal annual installments of 20,000 shares beginning on April 20, 2000.
(4) This option vests and becomes exercisable in five equal annual installments of approximately 10,335 shares beginning on April 12, 2001.
(5) This option vests and becomes exercisable in five equal annual installments of approximately 22,337 shares beginning on April 18, 2002.
(6) This option vests and becomes exercisable in five equal annual installments of approximately 7,842 shares beginning on November 7, 2002.
(7) This option vests and becomes exercisable in five equal annual installments of 8,957 shares beginning on November 7, 2002.
(8) This option vests and becomes exercisable in five equal annual installments of 25 shares beginning on March 19, 2003.
(9) This option vests and becomes exercisable in five equal annual installments of approximately 25,394 shares beginning on May 2, 2003.
(10) This option vests and becomes exercisable in five equal annual installments of approximately 39,542 shares beginning on July 25, 2003.
(11) This option vests and becomes exercisable in five equal annual installments of approximately 79,830 shares beginning on July 23, 2004.
(12) This option vests and becomes exercisable in five equal annual installments of 80,000 shares beginning on July 29, 2005.
(13) This option vests and becomes exercisable in five equal annual installments of 60,000 shares beginning on July 28, 2006.
(14) This option vests and becomes exercisable in five equal annual installments of 100,000 shares beginning on July 27, 2007.
(15) Includes 124,250 shares of unvested restricted stock.

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