X0306
4
2018-12-10
0
0001060736
SEATTLE GENETICS INC /WA
SGEN
0001167496
SIEGALL CLAY B
21823 30TH DRIVE SE
BOTHELL
WA
98021
1
1
0
0
President and CEO
Common Stock
2018-12-10
4
M
0
6300
12.16
A
738913
D
Common Stock
2018-12-10
4
S
0
6300
59.15
D
732613
D
Common Stock
2018-12-10
4
M
0
13148
12.16
A
745761
D
Common Stock
2018-12-10
4
S
0
13148
59.96
D
732613
D
Common Stock
2018-12-10
4
M
0
700
12.16
A
733313
D
Common Stock
2018-12-10
4
S
0
700
60.78
D
732613
D
Non-Qualified Stock Option (right to buy)
12.16
2018-12-10
4
M
0
6300
0.0
D
2019-08-25
Common Stock
6300
175033
D
Non-Qualified Stock Option (right to buy)
12.16
2018-12-10
4
M
0
13148
0.0
D
2019-08-25
Common Stock
13148
161885
D
Non-Qualified Stock Option (right to buy)
12.16
2018-12-10
4
M
0
700
0.0
D
2019-08-25
Common Stock
700
161185
D
Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting.
The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.
Reflects sales of common stock executed in multiple transactions at prices ranging from $58.61 to $59.59. 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 common stock executed in multiple transactions at prices ranging from $59.63 to $60.58. 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 common stock executed in multiple transactions at prices ranging from $60.64 to $60.84. 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 8/25/10 and monthly thereafter until all the shares were fully vested on 8/25/13.
By: /s/ Jean Liu For: Clay B. Siegall
2018-12-12