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Filing Details

Accession Number:: 0001103543-10-000003
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2010-05-05 13:00:00
Reporting Period:: 2010-05-03

Filing Date:: 2010-05-05
Accepted Time:: 2010-05-05 19:48:08
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1373671	Isilon Systems Inc.	ISLN	Computer Storage Devices (3572)	912101027

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1103465	Madrona Venture Fund I-B, Lp	1000 Second Ave., Suite 3700 Seattle WA 98104	No	No	Yes	No
1103543	P L I-A Fund Venture Madrona	1000 Second Ave., Suite 3700 Seattle WA 98104	No	No	Yes	No
1107551	Madrona Managing Director Fund, Llc	1000 Second Ave. Suite 3700 Seattle WA 98104	No	No	Yes	No
1382421	Madrona Investment Partners, Llc	1000 Second Avenue Suite 3700 Seattle WA 98104	No	No	Yes	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2010-05-03	50,000	$13.57	7,073,737	No	4	S	Direct
Common Stock	Disposition	2010-05-04	50,000	$13.88	7,023,737	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Direct

Footnotes

Represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $12.97 to $13.83, inclusive. For all transactions reported in this Form 4 utilizing a weighted-average price, the reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
Represents 5,703,488 shares held by Madrona Venture Fund I-A, LP, 620,763 shares held by Madrona Venture Fund I-B, LP and 749,486 shares held by Madrona Managing Director Fund, LLC. Madrona Investment Partners, LLC is the general partner of Madrona Venture Fund I-A, LP and Madrona Venture Fund I-B, LP and disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein.
Represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $13.44 to $14.29, inclusive. For all transactions reported in this Form 4 utilizing a weighted-average price, the reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
Represents 5,663,173 shares held by Madrona Venture Fund I-A, LP, 616,375 shares held by Madrona Venture Fund I-B, LP and 744,189 shares held by Madrona Managing Director Fund, LLC. Madrona Investment Partners, LLC is the general partner of Madrona Venture Fund I-A, LP and Madrona Venture Fund I-B, LP and disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein.