X0303 4 2010-05-27 0 0001262039 FORTINET INC FTNT 0001476571 Hara George C/O FORTINET, INC. 1090 KIFER ROAD SUNNYVALE CA 94086 1 0 0 0 Common Stock 2010-05-27 4 J 0 86621 0 D 4560 I See footnote Common Stock 2010-05-27 4 S 0 4560 16.2071 D 0 I See footnote Common Stock 2010-05-27 4 J 0 45590 0 A 45590 I See footnote Common Stock 866668 I See footnote Common Stock 533333 I See footnote Common Stock 336000 I See footnote Common Stock 213334 I See footnote Pro rata distribution of the Common Stock of the Issuer by Defta Archipelago, LLC ("DA") without consideration to its members. Shares held directly by DA. The Reporting Person is a director of Defta, Inc., the manager of DA, and may be deemed to share voting and dispositive power over the shares that may be deemed beneficially held by DA. The Reporting Person disclaims beneficial ownership of all such shares, except to the extent of his pecuniary interest therein. The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $16.20 to $16.215 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. Shares held directly by Technology Advisory Group, LLC ("TAG"). The Reporting Person is the director of TAG and may be deemed to share voting and dispositive power over the shares that may be deemed beneficially held by TAG. The Reporting Person disclaims beneficial ownership of all such shares, except to the extent of his pecuniary interest therein. Shares held directly by Defta Alliance Fund II, L.P. ("DAF"). The Reporting Person is a managing member of Coba Management, LLC ("Coba Mgmt"), the general partner of DAF, and may be deemed to share voting and dispositive power over the shares that may be deemed beneficially held by DAF. The Reporting Person disclaims beneficial ownership of all such shares, except to the extent of his pecuniary interest therein. Shares held directly by Coba Mgmt. The Reporting Person is a managing member of Coba Mgmt and may be deemed to share voting and dispositive power over the shares that may be deemed beneficially held by Coba Mgmt. The Reporting Person disclaims beneficial ownership of all such shares, except to the extent of his pecuniary interest therein. Shares held directly by Defta Fortinet Holdings, LP ("DFH"). The Reporting Person is a managing member of Coba Mgmt, the general partner of DFH, and may be deemed to share voting and dispositive power over the shares that may be deemed beneficially held by DFH. The Reporting Person disclaims beneficial ownership of all such shares, except to the extent of his pecuniary interest therein. Shares held directly by Defta Ubiquitous Technologies, LP ("DUT"). The Reporting Person is a managing member of Coba International, the general partner of DUT, and may be deemed to share voting and dispositive power over the shares that may be deemed beneficially held by DUT. The Reporting Person disclaims beneficial ownership of all such shares, except to the extent of his pecuniary interest therein. /s/ George Hara 2010-06-01