Company:  SEATTLE GENETICS INC /WA (SGEN)
Form Type:  SC 13D/A
Filing Date:  4/23/2012 
CIK:  0001060736 
Address:  21823 30TH DRIVE SE
SUITE 
City, State, Zip:  BOTHELL, Washington 98021 
Telephone:  (425) 527-4000 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$35.35   		Change: 
0.20 (0.57%)  
Trade Time: 
May 23   		Market Cap: 
$4.29B
Description of Business
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  FORM SC 13D/A
  EXHIBIT 4
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