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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1037760	Cepheid	CPHD	Laboratory Analytical Instruments (3826)	770441625

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1240656	H Joseph Smith	C/O Cepheid 904 Caribbean Drive Sunnyvale CA 94089	Svp, Bus Dev And Gc	No	Yes	No	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	2011-04-21	648	$9.08	5,022	No	4	M	Direct
Common Stock	Disposition	2011-04-21	648	$31.50	4,374	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2011-04-21	648	$0.00	648	$9.08

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
44,352		2015-04-27	No	4	M	Direct

Footnotes

The transaction reported on this Form 4/A was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 30, 2010.
This is an additional transaction that was excluded from the Form 4 that was filed with the U.S. Securities and Exchange Commission on April 21, 2011.
Corrects the amount of securities beneficially owned following the reported transaction as reported on a Form 4 filed with the U.S. Securities and Exchange Commission on April 21, 2011.
The stock option grant is 100% vested and exercisable.