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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
901219	Human Genome Sciences Inc	HGSI	In Vitro & In Vivo Diagnostic Substances (2835)	223178468

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1191235	C David Stump	14200 Shady Grove Road Rockville MD 20850	Exec. Vice President	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	2010-03-01	50,000	$12.56	69,576	No	4	M	Direct
Common Stock	Disposition	2010-03-01	50,000	$28.07	19,576	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	Employee Stock Option - Right to Buy	Disposition	2010-03-01	50,000	$0.00	50,000	$12.56

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
34,000		2010-04-07	No	4	M	Direct

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person and Charles Schwab effective 12/9/09.
This transaction was executed in multiple trades at prices ranging from $27.91 to $28.18. The price reported above reflects the weighted average sale price. Upon written request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price is available.
These are fully vested and exercisable.