Fortinet, Inc. — Director's Dealing 2011

May 31, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FORTINET INC (FTNT)
CIK: 0001262039
Period of Report: 2011-05-27

Reporting Person: CHEN PEHONG (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-27	Common Stock	M	4000	$17.98	Acquired	4000	Direct
2011-05-27	Common Stock	S	4000	$48.1993	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-27	Stock Option (right to buy)	$17.98	M	4000	Disposed	2017-08-05	Common Stock (4000)	Direct

Footnotes

F1: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $48.173 to $48.36 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.

F2: The option vests in forty-eight equal monthly installments beginning on September 5, 2010.