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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
1319606	Andrew Miller	C/O Cepheid 904 Caribbean Drive Sunnyvale CA 94089	Evp, Cfo	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	2011-05-16	2,500	$8.43	5,665	No	4	M	Direct
Common Stock	Disposition	2011-05-16	2,500	$31.02	3,165	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	2011-05-16	2,500	$0.00	2,500	$8.43

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
20,000		2016-04-28	No	4	M	Direct

Footnotes

This is an additional transaction that was excluded from the Form 4 that was filed with the U.S. Securities and Exchange Commission on May 16, 2011.
The transaction reported on this Form 4/A was effected pursuant to a 10b5-1 trading plan adopted by the reporting person on May 11, 2010.
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 May 16, 2011.
Represents the aggregate of sales effected on the same day at different prices.
Represents the weighted average sales price per share. The shares sold at prices ranging from $30.75 to $31.36 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer
25% of the shares vested and became exercisable on April 28, 2010; then 2.0833% of the shares vested and became exercisable monthly thereafter until 100% vested.