Fortinet, Inc. — Director's Dealing 2011

May 5, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FORTINET INC (FTNT)
CIK: 0001262039
Period of Report: 2011-05-03

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-03	Common Stock	S	10869	$43.9333	Disposed	6337080	Direct
2011-05-03	Common Stock	S	15464	$44.9873	Disposed	6321616	Direct
2011-05-03	Common Stock	S	3667	$45.7858	Disposed	6317949	Direct
2011-05-03	Common Stock	G	6000	—	Disposed	6311949	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1201572	Indirect
Common Stock	1201572	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 February 23, 2011.

F2: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $43.505 to $44.48 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 within the ranges set forth in footnotes (2), (4) and (5) to this Form 4.

F3: The amount of securities beneficially owned after the reported transaction has been adjusted to correct an administrative error that initially appeared in row 4 of column 5 of the Form 4 filed on November 24, 2010 and in subsequent Forms 4 filed between December 22, 2010 and April 21, 2011.

F4: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $44.55 to $45.50 per share.

F5: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $45.55 to $46.23 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.

F6: Shares held directly by The Ken Xie 2009 Grantor Retained Annuity Trust dated September 10, 2009 for which the Reporting Person serves as trustee.

F7: 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.