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 *
BENSON JON H
   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)
Senior Vice President, Storage
(Last)
(First)
(Middle)
4150 NETWORK CIRCLE		 3. Date of Earliest Transaction (Month/Day/Year)
04/25/2007
(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               168,911 (1) 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) (2) $ 2.35               (6) 02/14/2012 Common Stock 11,624   11,624 D  
Employee Stock Option (Right to Buy) (3) $ 2.17               (6) 02/09/2013 Common Stock 88,301   88,301 D  
Employee Stock Option (Right to Buy) (3) $ 2.85               (6) 02/01/2014 Common Stock 139,419   139,419 D  
Employee Stock Option (Right to Buy) (2) $ 3.13               (6) 02/07/2015 Common Stock 250,185   250,185 D  
Employee Stock Option (Right to Buy) (4) $ 3.9               (7) 10/26/2013 Common Stock 100,000   100,000 D  
Employee Stock Option (Right to Buy) (5) $ 5.33               (8) 11/01/2014 Common Stock 20,700   20,700 D  
Employee Stock Option (Right to Buy) $ 5.27 04/25/2007   A   150,000     (9) 04/24/2015 Common Stock 150,000 $ 0 150,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
BENSON JON H
4150 NETWORK CIRCLE
SANTA CLARA, CA 95054		       Senior Vice President, Storage  

Signatures

 /s/ Jon H. Benson   04/26/2007
**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 includes 130,250 shares of unvested restricted stock.
(2) This option was granted under the Storage Technology Corporation 1995 Equity Participation Plan, as Amended.
(3) This option was granted under the Storage Technology Corporation 2001 Leveraged Equity Acquisition Program (LEAP) under the Amended and Restated 1995 Equity Participation Plan.
(4) This option was granted under the 1996 Equity Compensation Acquisition Plan.
(5) This option was granted under the Sun Microsystems, Inc. 1990 Long-Term Equity Incentive Plan.
(6) Immediately.
(7) This option vests and becomes exercisable in five equal annual installments of 20,000 shares beginning on August 31, 2006.
(8) This option vests and becomes exercisable in five equal annual installments of 4,140 shares beginning on November 2, 2007.
(9) This option vests and becomes exercisable in five equal annual installments of 30,000 shares beginning on April 25, 2008.

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