FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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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1. Name and Address of Reporting Person *   Green Richard L 2. Date of Event Requiring Statement (Month/Day/Year) 09/05/2006 3. Issuer Name and Ticker or Trading Symbol SUN MICROSYSTEMS, INC. [SUNW] (Last) (First) (Middle) 4150 NETWORK CIRCLE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP, Software Group 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) SANTA CLARA, CA 95054 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 435,138 (1) D   Common Stock 4,604 I Shares held by wife. Common Stock 1,104 I Shares held in a custodial account for son.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (Right to Buy) (2)	05/21/2004(3)	05/21/2011	Common Stock	3,000	$ 4.2	I	Options held by wife.
Employee Stock Option (Right to Buy) (2)	11/13/2004(4)	11/13/2011	Common Stock	5,000	$ 4.208	I	Options held by wife.
Employee Stock Option (Right to Buy) (2)	09/17/2005(5)	09/17/2012	Common Stock	5,000	$ 3.94	I	Options held by wife.
Employee Stock Option (Right to Buy) (2)	01/27/2006(6)	01/27/2013	Common Stock	12,000	$ 4.12	I	Options held by wife.
Employee Stock Option (Right to Buy) (2)	07/27/2007(7)	07/27/2014	Common Stock	250,000	$ 4.26	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Green Richard L 4150 NETWORK CIRCLE SANTA CLARA, CA 95054	Â	Â	  EVP, Software Group	Â

Signatures

/s/ Richard L. Green		09/15/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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 423,000 shares of unvested restricted stock units.
(2)	This option was granted under the Sun Microsystems, Inc. 1990 Long-Term Equity Incentive Plan.
(3)	This option vests and becomes exercisable in five equal annual installments of 600 shares beginning on May 21, 2004.
(4)	This option vests and becomes exercisable in five equal annual installments of 1,000 shares beginning on November 13, 2004.
(5)	This option vests and becomes exercisable in five equal annual installments of 1,000 shares beginning on September 17, 2005.
(6)	This option vests and becomes exercisable in five equal annual installments of 2,400 shares beginning on January 27, 2006.
(7)	This option vests and becomes exercisable in five equal annual installments of 50,000 shares beginning on July 27, 2007.

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