SEATTLE GENETICS INC

CUSIP: 812578102 Class: COM

EcoR1 Capital, LLC's Holding History (CIK: 0001587114)

Note: Option positions (PUT/CALL) are excluded.

Q3 2017
Shares 30,000 Value ($000) $1,632 Avg Close — Range —
Q2 2017
Shares 15,000 Value ($000) $776 Avg Close — Range —