Fortinet, Inc. — Director's Dealing 2010

May 24, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FORTINET INC (FTNT)
CIK: 0001262039
Period of Report: 2010-05-20

Reporting Person: PAISLEY CHRISTOPHER B (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-20	Common Stock	M	5000	$0.95	Acquired	5000	Direct
2010-05-20	Common Stock	S	5000	$16.1654	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-20	Stock Option (right to buy)	$0.95	M	5000	Disposed	2014-02-26	Common Stock (5000)	Direct

Footnotes

F1: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 22, 2010.

F2: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $16.01 to $16.35 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: Shares subject to the option are fully vested and immediately exercisable.