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 *
  Alton Gregg H
2. Date of Event Requiring Statement (Month/Day/Year)
07/27/2005
3. Issuer Name and Ticker or Trading Symbol
GILEAD SCIENCES INC [GILD]
(Last)
(First)
(Middle)
GILEAD SCIENCES, INC., 333 LAKESIDE DRIVE
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP, General Counsel
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

FOSTER CITY, CA 94404
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 19,354
D
 

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
Incentive Stock Option (right to buy)   (1) 01/18/2011 Common Stock 5,000 $ 7.3985 D  
Incentive Stock Option (right to buy)   (2) 04/05/2010 Common Stock 2,994 $ 7.4063 D  
Incentive Stock Option (right to buy)   (3) 04/18/2011 Common Stock 6,000 $ 9.81 D  
Incentive Stock Option (right to buy)   (4) 07/19/2011 Common Stock 5,476 $ 13.6025 D  
Incentive Stock Option (right to buy)   (5) 01/30/2012 Common Stock 3,000 $ 16.4375 D  
Incentive Stock Option (right to buy)   (6) 10/30/2012 Common Stock 2,992 $ 16.935 D  
Incentive Stock Option (right to buy)   (7) 01/29/2013 Common Stock 3,500 $ 17.885 D  
Incentive Stock Option (right to buy)   (8) 01/28/2014 Common Stock 3,000 $ 30.53 D  
Incentive Stock Option (right to buy)   (9) 01/26/2015 Common Stock 2,500 $ 32.02 D  
Incentive Stock Option (right to buy)   (10) 07/30/2013 Common Stock 1,068 $ 34.995 D  
Incentive Stock Option (right to buy)   (11) 11/02/2014 Common Stock 237 $ 35.35 D  
Incentive Stock Option (right to buy)   (12) 05/09/2015 Common Stock 515 $ 38.72 D  
Non-Qualified Stock Option (right to buy)   (1) 01/18/2011 Common Stock 5,000 $ 7.3985 D  
Non-Qualified Stock Option (right to buy)   (2) 04/05/2010 Common Stock 3,000 $ 7.4063 D  
Non-Qualified Stock Option (right to buy)   (13) 10/21/2009 Common Stock 15,010 $ 8.336 D  
Non-Qualified Stock Option (right to buy)   (3) 04/18/2011 Common Stock 5,000 $ 9.81 D  
Non-Qualified Stock Option (right to buy)   (4) 07/19/2011 Common Stock 74,524 $ 13.6025 D  
Non-Qualified Stock Option (right to buy)   (5) 01/30/2012 Common Stock 57,000 $ 16.4375 D  
Non-Qualified Stock Option (right to buy)   (6) 10/30/2012 Common Stock 21,008 $ 16.935 D  
Non-Qualified Stock Option (right to buy)   (14) 10/25/2011 Common Stock 30,000 $ 17.1625 D  
Non-Qualified Stock Option (right to buy)   (7) 01/29/2013 Common Stock 66,500 $ 17.885 D  
Non-Qualified Stock Option (right to buy)   (8) 01/28/2014 Common Stock 57,000 $ 30.53 D  
Non-Qualified Stock Option (right to buy)   (9) 01/26/2015 Common Stock 47,500 $ 32.02 D  
Non-Qualified Stock Option (right to buy)   (10) 07/30/2013 Common Stock 38,932 $ 34.995 D  
Non-Qualified Stock Option (right to buy)   (11) 11/02/2014 Common Stock 19,763 $ 35.35 D  
Non-Qualified Stock Option (right to buy)   (12) 05/09/2015 Common Stock 29,485 $ 38.72 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Alton Gregg H
GILEAD SCIENCES, INC.
333 LAKESIDE DRIVE
FOSTER CITY, CA 94404
      SVP, General Counsel  

Signatures

/s/Gregg H. Alton 07/29/2005
**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) Options vest 20% on 1/18/2002, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(2) Options vest 20% on 4/5/2001, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(3) Options vest 20% on 4/18/2002, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(4) Options vest 20% on 7/19/2002, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(5) Options vest 20% on 1/30/2003, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(6) Options vest 20% on 10/30/2003, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(7) Options vest 20% on 1/29/2004, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(8) Options vest 20% on 1/28/2005, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(9) Options vest 20% on 1/26/2006, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(10) Options vest 20% on 7/30/2004, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(11) Options vest 20% on 11/2/2005, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(12) Options vest 20% on 5/9/2006, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(13) Options vest 20% on 10/21/2000, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.
(14) Options vest 20% on 10/25/2002, first anniversary date of the grant, and the remaining will vest quarterly over the next four years.

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