Fortinet, Inc. — Director's Dealing 2010

May 27, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FORTINET INC (FTNT)
CIK: 0001262039
Period of Report: 2010-05-25

Reporting Person: Xie Ken (Director, President & CEO, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-25	Common Stock	S	30000	$15.6008	Disposed	6168499	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	590584	Indirect
Common Stock	1500000	Indirect
Common Stock	590584	Indirect
Common Stock	1500000	Indirect

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 November 30, 2009, as amended.

F2: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $15.50 to $15.79 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 held directly by The Ken Xie 2007 Annuity Trust dated September 25, 2007 for which the Reporting Person serves as trustee.

F4: Shares held directly by The Ken Xie 2009 Grantor Retained Annuity Trust dated September 10, 2009 for which the Reporting Person serves as trustee.

F5: Shares held directly by The Winnie Hiu-Yin Lee 2007 Annuity Trust dated September 25, 2007 for which the Reporting Person's spouse serves as trustee.

F6: Shares held directly by The Winnie Hiu-Yin Lee 2009 Grantor Retained Annuity Trust dated September 10, 2009 for which the Reporting Person's spouse serves as trustee.