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Filing Details

Accession Number:: 0001203311-17-000014
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2017-05-09 19:42:05
Reporting Period:: 2017-05-05

Filing Date:: 2017-05-09
Accepted Time:: 2017-05-09 19:42:05
SEC Url:: Form 4 Filing

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
1167496	B Clay Siegall	21823 30Th Drive Se Bothell WA 98021	President And Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2017-05-05	100	$10.29	636,535	No	4	M	Direct
Common Stock	Disposition	2017-05-05	100	$63.92	636,435	No	4	S	Direct
Common Stock	Acquisiton	2017-05-05	993	$10.29	637,428	No	4	M	Direct
Common Stock	Disposition	2017-05-05	993	$62.82	636,435	No	4	S	Direct
Common Stock	Acquisiton	2017-05-05	9,330	$10.29	645,765	No	4	M	Direct
Common Stock	Disposition	2017-05-05	9,330	$61.72	636,435	No	4	S	Direct
Common Stock	Acquisiton	2017-05-05	4,039	$10.20	640,474	No	4	M	Direct
Common Stock	Disposition	2017-05-05	4,039	$61.47	636,435	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

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2017-05-05	4,039	$0.00	4,039	$10.20
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2017-05-05	100	$0.00	100	$10.29
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2017-05-05	993	$0.00	993	$10.29
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2017-05-05	9,330	$0.00	9,330	$10.29

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2017-05-25	No	4	M	Direct
41,582	2017-08-28	No	4	M	Direct
40,589	2017-08-28	No	4	M	Direct
31,259	2017-08-28	No	4	M	Direct

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.
Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting.
Reflects sales of ordinary shares executed in multiple transactions at prices ranging from $62.61 to $63.29. The price reported reflects the weighted average sale price. The Reporting Person hereby 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 and prices at which the sales were effected.
Reflects sales of ordinary shares executed in multiple transactions at prices ranging from $61.54 to $62.42. The price reported reflects the weighted average sale price. The Reporting Person hereby 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 and prices at which the sales were effected.
Reflects sales of ordinary shares executed in multiple transactions at prices ranging from $61.38 to $61.54. The price reported reflects the weighted average sale price. The Reporting Person hereby 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 and prices at which the sales were effected.
Shares vested at a rate of 25% on 5/25/08 and monthly thereafter until all the shares were fully vested on 5/25/11.
Shares vested at a rate of 25% on 8/28/08 and monthly thereafter until all the shares were fully vested on 8/28/11.