Richter William D [Rocket]

Date	Name	Symbol	Type	Security	Shares	Price	Value	Reported
08/04/2010	Isilon Systems, Inc.	ISLN	Exercise	Stock Option (Right to Buy)	7.5k	$2.57	$19.3k	08/04/2010
08/04/2010	Isilon Systems, Inc.	ISLN	Sale	Common Stock	7.5k	$17.95	$134.6k	08/04/2010
02/09/2010	Isilon Systems, Inc.	ISLN	Grant	Stock Option (Right to Buy)	135k	$7.36	$993.6k	02/09/2010
02/09/2010	Isilon Systems, Inc.	ISLN	Grant		13.5k	$0.00	$0	02/09/2010