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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1105184	Nanosphere Inc	NSPH	Surgical & Medical Instruments & Apparatus (3841)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1165644	Mark Slezak	440 W. Ontario Street Chicago IL 60654		Yes	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2012-05-29	10,000	$1.69	1,400,505	No	4	P	Indirect	By Anda-Proquest, LLC

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By Anda-Proquest, LLC

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	2,902,407	Indirect	By Alfa-Tech, L.L.C.
Common Stock	4,006,136	Indirect	By Lurie Investment Fund, L.L.C.
Common Stock	24,324	Indirect	By Eagle Capital Management, L.L.C.
Common Stock	36,486	Indirect	By WASK Investments, LLC
Common Stock	524,324	Direct

Footnotes

Represents the weighted average price of multiple transactions with a range of prices between $1.65 and $1.73. The Reporting Person, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, undertakes to provide further information regarding the number of securities purchased at each separate price.
The Reporting Person disclaims beneficial ownership of these securities, except to the extent of his pecuniary interest therein.