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 Splain Michael E

2. Date of Event Requiring Statement (Month/Day/Year)
04/28/2008

3. Issuer Name and Ticker or Trading Symbol
SUN MICROSYSTEMS, INC. [JAVA]

(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, Microelectronics

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	24,116.5 ⁽¹⁾	D	Â
Common Stock	10,000	I	Shares held by Michael E. Splain & Donna M. Splain JT/WROS

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⁾	Â ⁽³⁾	04/18/2009	Common Stock	2,500	$ 74.32	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	06/13/2009	Common Stock	2,500	$ 65	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	09/27/2009	Common Stock	3,750	$ 31.64	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	11/07/2009	Common Stock	6,250	$ 50.36	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	11/07/2009	Common Stock	6,250	$ 50.36	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	03/19/2010	Common Stock	50	$ 36.56	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	03/19/2010	Common Stock	3,750	$ 36.56	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	07/25/2010	Common Stock	7,500	$ 14.8	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	07/25/2010	Common Stock	11,250	$ 14.8	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	05/21/2011	Common Stock	11,250	$ 16.8	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	11/13/2011	Common Stock	11,250	$ 16.832	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	05/18/2012	Common Stock	10,000	$ 15	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	09/17/2012	Common Stock	12,500	$ 15.76	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	11/10/2012	Common Stock	5,000	$ 18.4	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	01/27/2013	Common Stock	15,000	$ 16.48	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	07/28/2013	Common Stock	20,750	$ 15.4	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	11/02/2014	Common Stock	17,500	$ 21.32	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	01/31/2015	Common Stock	13,125	$ 26.56	D	Â
Employee Stock Option (Right to Buy) ⁽²⁾	Â ⁽³⁾	11/14/2015	Common Stock	15,525	$ 20	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Splain Michael E 4150 NETWORK CIRCLE SANTA CLARA,Â CAÂ 95054	Â	Â	Â EVP, Microelectronics	Â

Signatures

/s/ Michael E. Splain		04/30/2008
^**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 1,124 shares of unvested restricted stock and 19,875 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 beginning on the first anniversary of the date of grant.

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