Edgar Filing: SUN MICROSYSTEMS, INC.

Ownership Submission

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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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

Â YEN DAVID W

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, Storage Group

5. If Amendment, Date Original Filed(Month/Day/Year)

(Street)

SANTA CLARA,Â CAÂ 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	446,360 ⁽¹⁾	D	Â

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)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (Right to Buy) ⁽²⁾	06/16/2000⁽³⁾	06/16/2007	Common Stock	32,000	$ 14.6094	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	12/15/2000⁽³⁾	12/15/2007	Common Stock	100,000	$ 36.7188	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	04/12/2001⁽³⁾	04/12/2008	Common Stock	26,000	$ 40	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	08/16/2001⁽³⁾	08/16/2008	Common Stock	30,000	$ 57.6875	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	12/13/2001⁽³⁾	12/13/2008	Common Stock	250,000	$ 31.75	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	06/13/2002⁽³⁾	06/13/2009	Common Stock	20,000	$ 16.25	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	06/13/2002⁽³⁾	06/13/2009	Common Stock	250,000	$ 16.25	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	09/27/2002⁽³⁾	09/27/2009	Common Stock	20,000	$ 7.91	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	11/07/2002⁽³⁾	11/07/2009	Common Stock	50,000	$ 12.59	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	11/07/2002⁽³⁾	11/07/2009	Common Stock	50,000	$ 12.59	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	03/19/2003⁽³⁾	03/19/2010	Common Stock	200	$ 9.14	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	03/19/2003⁽³⁾	03/19/2010	Common Stock	20,000	$ 9.14	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	05/02/2003⁽³⁾	05/02/2012	Common Stock	200,000	$ 6.45	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	07/25/2003⁽⁴⁾	07/25/2012	Common Stock	300,000	$ 3.7	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	07/23/2004⁽⁵⁾	07/23/2013	Common Stock	500,000	$ 3.85	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	07/29/2005⁽⁶⁾	07/29/2012	Common Stock	400,000	$ 3.79	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	01/27/2006⁽⁷⁾	01/27/2013	Common Stock	200,000	$ 4.12	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	07/28/2006⁽⁸⁾	07/28/2013	Common Stock	300,000	$ 3.85	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	07/27/2007⁽⁹⁾	07/27/2014	Common Stock	500,000	$ 4.26	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
YEN DAVID W 4150 NETWORK CIRCLE SANTA CLARA,Â CAÂ 95054	Â	Â	Â EVP, Storage Group	Â

Signatures

/s/ David W. Yen		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 163,750 shares of unvested restricted stock.
(2)	This option was granted under the Sun Microsystems, Inc. 1990 Long-Term Equity Incentive Plan.
(3)	Immediately.
(4)	This option vests and becomes exercisable in five equal annual installments of 60,000 shares beginning on July 25, 2003.
(5)	This option vests and becomes exercisable in five equal annual installments of 100,000 shares beginning on July 23, 2004.
(6)	This option vests and becomes exercisable in five equal annual installments of 80,000 shares beginning on July 29, 2005.
(7)	This option vests and becomes exercisable in five equal annual installments of 40,000 shares beginning on January 27, 2006.
(8)	This option vests and becomes exercisable in five equal annual installments of 60,000 shares beginning on July 28, 2006.
(9)	This option vests and becomes exercisable in five equal annual installments of 100,000 shares beginning on July 27, 2007.

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