Fortinet, Inc. — Director's Dealing 2012

May 2, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FORTINET INC (FTNT)
CIK: 0001262039
Period of Report: 2012-05-01

Reporting Person: Whittle John (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-01	Common Stock	M	10016	$3.735	Acquired	10016	Direct
2012-05-01	Common Stock	M	1042	$8.43	Acquired	11058	Direct
2012-05-01	Common Stock	S	11058	$26.5725	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-01	Employee Stock Option (right to buy)	$3.735	M	4184	Disposed	2015-04-23	Common Stock (4184)	Direct
2012-05-01	Employee Stock Option (right to buy)	$3.735	M	5832	Disposed	2016-01-28	Common Stock (5832)	Direct
2012-05-01	Employee Stock Option (right to buy)	$8.43	M	1042	Disposed	2017-02-10	Common Stock (1042)	Direct

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to Rule 10b5-1 trading plans adopted by the Reporting Person on November 24, 2010 and June 6, 2011.

F2: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $25.95 to $26.89 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.

F3: One-fourth of the shares subject to the option vested on April 23, 2009 and one forty-eighth of the shares shall vest monthly thereafter.

F4: One-fourth of the shares subject to the option vested on January 28, 2010 and one forty-eighth of the shares shall vest monthly thereafter.

F5: One-fourth of the shares subject to the option vested on February 10, 2011 and one forty-eighth of the shares shall vest monthly thereafter.