SEATTLE GENETICS INC

CUSIP: 812578102 Class: COM

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q4 2014
Shares 10,920 Value ($000) $351 Avg Close — Range —
Q3 2014
Shares 11,440 Value ($000) $425 Avg Close — Range —
Q2 2014
Shares 11,440 Value ($000) $438 Avg Close — Range —
Q1 2014
Shares 11,490 Value ($000) $523 Avg Close — Range —
Q4 2013
Shares 11,840 Value ($000) $472 Avg Close — Range —
Q3 2013
Shares 57,740 Value ($000) $2,531 Avg Close — Range —