SEC FORM 4

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

MILLIGAN JOHN F

(Last)

(First)

(Middle)

333 LAKESIDE DRIVE

(Street)

FOSTER CITY

94404

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
GILEAD SCIENCES INC [ GILD ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	COO and CFO

3. Date of Earliest Transaction (Month/Day/Year)
09/04/2007

4. If Amendment, Date of 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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	09/04/2007		M		53,280⁽¹⁾	A	$4.905	260,673⁽²⁾	D
Common Stock	09/04/2007		M		6,720⁽¹⁾	A	$8.5813	267,393⁽²⁾	D
Common Stock	09/04/2007		S		5,000⁽¹⁾	D	$36.4633	262,393⁽²⁾	D
Common Stock	09/04/2007		S		5,000⁽¹⁾	D	$36.54	257,393⁽²⁾	D
Common Stock	09/04/2007		S		10,000⁽¹⁾	D	$36.585	247,393⁽²⁾	D
Common Stock	09/04/2007		S		10,000⁽¹⁾	D	$36.649	237,393⁽²⁾	D
Common Stock	09/04/2007		S		10,000⁽¹⁾	D	$36.79	227,393⁽²⁾	D
Common Stock	09/04/2007		S		4,644⁽¹⁾	D	$36.9313	222,749⁽²⁾	D
Common Stock	09/04/2007		S		15,356⁽¹⁾	D	$36.9113	207,393⁽²⁾⁽³⁾	D

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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Non-Qualified Stock Option (right to buy)	$4.905	09/04/2007		M			53,280	⁽⁴⁾	04/17/2011	Common Stock	53,280	$0	0	D
Non-Qualified Stock Option (right to buy)	$8.5813	09/04/2007		M			6,720	⁽⁵⁾	10/24/2011	Common Sto	6,720	$0	153,280	D

Explanation of Responses:

1. The exercise and sale transactions reported in this Form 4 are made pursuant to a Rule 10b5-1 trading plan established by John Milligan on May 16, 2007.

2. All shares and dollar amounts reflect a two-for-one split that was effected on June 22, 2007 benefiting all shareholders of record as of May 24, 2007.

3. Amount of securities beneficially owned following the reported transactions includes 791 shares acquired under the Gilead Sciences, Inc. Employee Stock Purchase Plan on June 29, 2007.

4. The options vested 20% on April 18, 2002, the first anniversary date of the grant. The balance vested 5% every three months thereafter and was fully vested as of April 18, 2006.

5. The options vested 20% on October 25, 2002, the first anniversary date of the grant. The balance vested 5% every three months thereafter and was fully vested as of October 25, 2006.

	/s/ John F. Milligan	09/04/2007
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.