MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q2 2017
Shares 20,558 Value ($000) $25 Avg Close — Range —
Q1 2017
Shares 19,968 Value ($000) $62 Avg Close — Range —
Q4 2016
Shares 21,259 Value ($000) $87 Avg Close — Range —
Q3 2016
Shares 21,259 Value ($000) $135 Avg Close — Range —
Q2 2016
Shares 21,259 Value ($000) $115 Avg Close — Range —
Q1 2016
Shares 20,249 Value ($000) $169 Avg Close — Range —
Q4 2015
Shares 19,135 Value ($000) $151 Avg Close — Range —
Q3 2015
Shares 18,634 Value ($000) $159 Avg Close — Range —
Q2 2015
Shares 19,522 Value ($000) $241 Avg Close — Range —
Q1 2015
Shares 18,578 Value ($000) $220 Avg Close — Range —
Q4 2014
Shares 17,113 Value ($000) $193 Avg Close — Range —
Q3 2014
Shares 17,322 Value ($000) $152 Avg Close — Range —
Q2 2014
Shares 17,984 Value ($000) $131 Avg Close — Range —
Q3 2013
Shares 45,232 Value ($000) $172 Avg Close — Range —