Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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 *
Xie Ken
   2. Issuer Name and Ticker or Trading Symbol
FORTINET INC [FTNT] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President & CEO
(Last)
(First)
(Middle)
C/O FORTINET, INC. 1090 KIFER ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
11/23/2010
(Street)

SUNNYVALE, CA 94086		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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)
Code V Amount (A) or (D) Price
Common Stock 05/25/2010   G V 6,000 D $ 0 5,862,499 D  
Common Stock 06/22/2010   G V 6,000 D $ 0 5,856,499 D  
Common Stock 07/20/2010   G V 6,000 D $ 0 5,850,499 D  
Common Stock 08/24/2010   G V 12,000 D $ 0 5,838,499 D  
Common Stock 09/27/2010   G V 18,000 D $ 0 6,417,355 (1) (2) D  
Common Stock 10/19/2010   G V 18,000 D $ 0 6,399,355 D  
Common Stock 11/23/2010   M   30,000 A $ 2.15 6,429,355 D  
Common Stock 11/23/2010   M   150,000 A $ 2.365 6,579,355 D  
Common Stock 11/23/2010   S(3)   90,000 D $ 31.5242 (4) 6,489,355 D  
Common Stock 11/23/2010   G V 18,000 D $ 0 6,471,355 D  
Common Stock 09/14/2010   G V 367,287 D $ 0 0 (5) I See footnote (6)
Common Stock 09/14/2010   G V 367,287 D $ 0 0 (7) I See footnote (8)
Common Stock               1,201,572 (9) I See footnote (10)
Common Stock               1,201,572 (11) I See footnote (12)

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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 Underlying Securities
(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 of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) $ 2.15 11/23/2010   M     30,000   (13) 03/01/2011 Common Stock 30,000 $ 0 0 D  
Employee Stock Option (right to buy) $ 2.365 11/23/2010   M     150,000   (13) 07/20/2011 Common Stock 150,000 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Xie Ken
C/O FORTINET, INC. 1090 KIFER ROAD
SUNNYVALE, CA 94086		   X   X   President & CEO  

Signatures

 /s/ John Whittle, by power of attorney   11/24/2010
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Includes 298,428 shares previously reported as held directly by The Ken Xie 2009 Grantor Retained Annuity Trust dated September 10, 2009 for which the Reporting Person serves as trustee (the "Xie 2009 GRAT") and 298,428 shares previously reported as held directly by The Winnie Hiu-Yin Lee 2009 Grantor Retained Annuity Trust dated September 10, 2009 for which the Reporting Person's spouse serves as trustee (the "Lee 2009 GRAT") which were re-registered on September 10, 2010 and are now held directly by the Reporting Person.
(2) Includes 223,297 shares previously reported as held directly by The Ken Xie 2007 Annuity Trust dated September 25, 2007 for which the Reporting Person serves as trustee (the "Xie 2007 Annuity Trust") and 223,297 shares previously reported as held directly by The Winnie Hiu-Yin Lee 2007 Annuity Trust dated September 25, 2007 for which the Reporting Person's spouse serves as trustee (the "Lee 2007 Annuity Trust") which were re-registered on September 14, 2010 and are now held directly by the Reporting Person.
(3) The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 30, 2009, as amended.
(4) The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $31.11 to $31.77 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
(5) Excludes 223,297 shares previously reported as held directly by the Xie 2007 Annuity Trust which were re-registered on September 14, 2010 and are now held directly by the Reporting Person.
(6) Shares held directly by the Xie 2007 Annuity Trust.
(7) Excludes 223,297 shares previously reported as held directly by the Lee 2007 Annuity Trust which were re-registered on September 14, 2010 and are now held directly by the Reporting Person.
(8) Shares held directly by the Lee 2007 Annuity Trust.
(9) Excludes 298,428 shares previously reported as held directly by the Xie 2009 GRAT which were re-registered on September 10, 2010 and are now held directly by the Reporting Person.
(10) Shares held directly by the Xie 2009 GRAT.
(11) Excludes 298,428 shares previously reported as held directly by the Lee 2009 GRAT which were re-registered on September 10, 2010 and are now held directly by the Reporting Person.
(12) Shares held directly by the Lee 2009 GRAT.
(13) Shares subject to the option are fully vested and immediately exercisable.

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