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* Whittle John (Last) (First) (Middle) C/O FORTINET, INC. 899 KIFER ROAD (Street) SUNNYVALE CA 94086 (City) (State) (Zip)	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) VP Corp Dev&Strat Alliance,GC
	3. Date of Earliest Transaction (Month/Day/Year) 05/01/2019
	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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/01/2019		M(1)		1,875	A	$0	10,559	D
Common Stock	05/01/2019		M(2)		1,875	A	$0	12,434	D
Common Stock	05/01/2019		M(3)		1,094	A	$0	13,528	D
Common Stock	05/01/2019		F(4)		2,403	D	$91.89	11,125	D
Common Stock	05/01/2019		M(5)		625	A	$23.83	11,750	D
Common Stock	05/01/2019		M(5)		625	A	$37.24	12,375	D
Common Stock	05/01/2019		S(5)		1,250(6)	D	$92.4414(7)	11,125	D
Common Stock	05/03/2019		S(5)		500(6)	D	$83.896(8)	10,625	D
Common Stock	05/03/2019		S(5)		1,440(6)	D	$85.0597(9)	9,185	D
Common Stock	05/03/2019		S(5)		501(6)	D	$85.6246(10)	8,684	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	$0(11)	05/01/2019		M(1)			1,875	(12)	(12)	Common Stock	1,875	$0	5,625	D
Restricted Stock Units	$0(11)	05/01/2019		M(2)			1,875	(13)	(13)	Common Stock	1,875	$0	13,125	D
Restricted Stock Units	$0(11)	05/01/2019		M(3)			1,094	(14)	(14)	Common Stock	1,094	$0	12,039	D
Non-qualified Stock Option (right to buy)	$23.83	05/01/2019		M(5)			625	(15)	02/11/2023	Common Stock	625	$0	6,251	D
Non-Qualified Stock Option (right to buy)	$37.24	05/01/2019		M(5)			625	(16)	02/16/2024	Common Stock	625	$0	21,875	D

Explanation of Responses:

1. Vesting of restricted stock units ("RSUs") granted to the Reporting Person on February 11, 2016.

2. Vesting of RSUs granted to the Reporting Person on February 16, 2017.

3. Vesting of RSUs granted to the Reporting Person on February 20, 2018.

4. 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 line 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.

5. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 9, 2018.

6. Represents the aggregate of sales effected on the same day at different prices.

7. Represents the weighted average sales price per share. The shares sold at prices ranging from $91.98 to $92.88 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.

8. Represents the weighted average sales price per share. The shares sold at prices ranging from $83.37 to $84.35 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.

9. Represents the weighted average sales price per share. The shares sold at prices ranging from $84.54 to $85.43 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.

10. Represents the weighted average sales price per share. The shares sold at prices ranging from $85.58 to $85.93 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.

11. Each RSU represents a contingent right to receive one share of the Issuer's common stock.

12. 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.

13. 25% of the RSUs vest on February 1, 2018, 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.

14. 25% of the RSUs vested on February 1, 2019, 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.

15. 1/4 of the shares subject to the option vested on February 11, 2017 and 1/48 of the shares subject to the option vests monthly thereafter.

16. 1/4 of the shares subject to the option vested on February 16, 2018 and 1/48 of the shares subject to the option vests monthly thereafter.

	/s/John Whittle	05/03/2019
	** 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).
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