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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1301081	Pharmasset Inc	VRUS	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1397331	Iii F Robert Williamson	303A College Road East Princeton NJ 08540		Yes	No	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, $.001 Par Value Per Share	Acquisiton	2011-05-06	20,000	$3.00	34,666	No	4	M	Direct
Common Stock, $.001 Par Value Per Share	Disposition	2011-05-06	31,666	$104.36	3,000	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	Stock Option (Right to Buy)	Disposition	2011-05-06	20,000	$0.00	20,000	$3.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2014-08-10	No	4	M	Direct

Footnotes

Represents the weighted average sales price for all shares for price increments ranging from $104 to $105.25.
The Reporting Person undertakes to provide, upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price for all transactions reported on this Form 4.
These options were granted on August 10, 2004. 25% were vested upon the grant, 25% became vested on the one-year anniversary of the grant and 6.25% became vested quarterly thereafter.