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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1060736	Seattle Genetics Inc	SGEN	Biological Products, (No Disgnostic Substances) (2836)	911874389

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1202785	Eric Dobmeier	21823 30Th Drive Se Bothell WA 98021	Chief Operating Officer	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
Common Stock	Disposition	2014-01-21	21,435	$47.87	112,408	No	4	S	Direct
Common Stock	Disposition	2014-01-21	19,616	$47.90	92,792	No	4	S	Direct
Common Stock	Disposition	2014-01-21	14,959	$48.02	77,833	No	4	S	Direct

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

Footnotes

The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by Eric Dobmeier dated December 12, 2013.
$47.8735 represents an average price per share for the shares sold on 1/21/2014. The sell price for shares sold on this day ranged from $47.10 to $49.07.
Amount of Securities beneficially owned following reported transactions includes 61,334 Restricted Stock Units subject to vesting.
$47.8955 represents an average price per share for the shares sold on 1/21/2014. The sell price for shares sold on this day ranged from $47.03 to $48.83.
$48.0160 represents an average price per share for the shares sold on 1/21/2014. The sell price for shares sold on this day ranged from $47.03 to $48.83.