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 * Jensen Keith   2. Issuer Name and Ticker or Trading Symbol FORTINET INC [FTNT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Accounting Officer (Last) (First) (Middle) C/O FORTINET, INC., 899 KIFER ROAD 3. Date of Earliest Transaction (Month/Day/Year) 08/01/2017 (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 08/01/2017   M(1)   1,563 A $ 0 1,917 D   Common Stock 08/01/2017   M(2)   250 A $ 0 2,167 D   Common Stock 08/01/2017   M(3)   313 A $ 0 2,480 D   Common Stock 08/01/2017   M(4)   938 A $ 0 3,418 D   Common Stock 08/01/2017   F(5)   1,153 D $ 36.8 2,265 D

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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
Restricted Stock Units	$ 0 (6)	08/01/2017		M(1)			1,563	(7)	(7)	Common Stock	1,563	$ 0	6,250	D
Restricted Stock Units	$ 0 (6)	08/01/2017		M(2)			250	(8)	(8)	Common Stock	250	$ 0	1,500	D
Restricted Stock Units	$ 0 (6)	08/01/2017		M(3)			313	(9)	(9)	Common Stock	313	$ 0	2,500	D
Restricted Stock Units	$ 0 (6)	08/01/2017		M(4)			938	(10)	(10)	Common Stock	938	$ 0	9,375	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Jensen Keith C/O FORTINET, INC. 899 KIFER ROAD SUNNYVALE, CA 94086			Chief Accounting Officer

Signatures

/s/ John Whittle, by power of attorney		08/03/2017
**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)	Vesting of restricted stock units ("RSUs") granted to the Reporting Person on August 6, 2014.
(2)	Vesting of RSUs granted to the Reporting Person on February 11, 2015.
(3)	Vesting of RSUs granted to the Reporting Person on August 5, 2015.
(4)	Vesting of RSUs granted to the Reporting Person on February 11, 2016.
(5)	Exempt transaction pursuant to Section 16b-3(e) - payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. All of the shares reported as disposed of on this row were relinquished by the Reporting Person and cancelled by the Issuer in exchange for the Issuer's agreement to pay federal and state tax withholding obligations of the Reporting Person resulting from the vesting of RSUs. The Reporting Person did not sell or otherwise dispose of any of the shares reported on this Form 4 for any reason other than to cover required taxes.
(6)	Each RSU represents a contingent right to receive one share of the Issuer's common stock.
(7)	25% of the RSUs vested on August 1, 2015, then the remaining 75% of the RSUs vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the continuing employment of the Reporting Person on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon vesting.
(8)	25% of the RSUs vest on February 1, 2016, then the remaining 75% of the RSUs vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the continuing employment of the Reporting Person on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon vesting.
(9)	25% of the RSUs vest on August 1, 2016, then the remaining 75% of the RSUs vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the continuing employment of the Reporting Person on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon vesting.
(10)	25% of the RSUs vest on February 1, 2017, then the remaining 75% of the RSUs vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the continuing employment of the Reporting Person on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon vesting.

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