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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
1393945	C Thomas Reynolds	21823 30Th Drive Se Bothell WA 98021	Chief Medical 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	Acquisiton	2013-01-15	3,679	$11.09	61,280	No	4	M	Direct
Common Stock	Disposition	2013-01-15	3,679	$28.01	57,601	No	4	S	Direct
Common Stock	Acquisiton	2013-01-15	35,492	$11.09	93,093	No	4	M	Direct
Common Stock	Disposition	2013-01-15	35,492	$28.00	57,601	No	4	S	Direct
Common Stock	Acquisiton	2013-01-15	35,493	$11.09	93,094	No	4	M	Direct
Common Stock	Disposition	2013-01-15	35,493	$28.00	57,601	No	4	S	Direct
Common Stock	Acquisiton	2013-01-15	33,643	$12.16	91,244	No	4	M	Direct
Common Stock	Disposition	2013-01-15	33,643	$28.01	57,601	No	4	S	Direct
Common Stock	Acquisiton	2013-01-15	12,605	$12.00	70,206	No	4	M	Direct
Common Stock	Disposition	2013-01-15	12,605	$28.01	57,601	No	4	S	Direct
Common Stock	Acquisiton	2013-01-15	4,167	$15.46	61,768	No	4	M	Direct
Common Stock	Disposition	2013-01-15	4,167	$28.01	57,601	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
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	Incentive Stock Option (right to buy)	Disposition	2013-01-15	3,679	$0.00	3,679	$11.09
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2013-01-15	35,492	$0.00	35,492	$11.09
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2013-01-15	35,493	$0.00	35,493	$11.09
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2013-01-15	12,605	$0.00	12,605	$12.00
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2013-01-15	33,643	$0.00	33,643	$12.16
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2013-01-15	4,167	$0.00	4,167	$15.46

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2018-08-27	No	4	M	Direct
35,493	2018-08-27	No	4	M	Direct
0	2018-08-27	No	4	M	Direct
43,751	2020-08-27	No	4	M	Direct
12,611	2019-08-25	No	4	M	Direct
60,199	2021-08-24	No	4	M	Direct

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Dr. Reynolds on December 13, 2012.
$28.0058 represents an average price per share for the shares sold on 1/15/2013. The sell price for shares sold on this day ranged from $27.36 to 28.27.
Amount of securities beneficially owned following reported transactions includes 53,886 Restricted Stock Units subject to vesting.
The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Dr. Reynolds on November 8, 2011.
Shares vested at a rate of 25% on 8/27/09 and monthly thereafter until all the shares were fully vested on 8/27/12.
Shares shall vest at a rate of 25% on 8/27/11 and monthly thereafter until all the shares are fully vested on 8/27/14.
Shares shall vest at a rate of 25% on 8/25/10 and monthly thereafter until all the shares are fully vested on 8/25/13.
Shares shall vest at a rate of 25% on 8/24/12 and monthly thereafter until all the shares are fully vested on 8/24/15.