MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q2 2017
Shares 25,442 Value ($000) $32 Avg Close — Range —
Q4 2016
Shares 10,681 Value ($000) $44 Avg Close — Range —
Q1 2016
Shares 1,000 Value ($000) $8 Avg Close — Range —
Q4 2015
Shares 600 Value ($000) $5 Avg Close — Range —
Q3 2015
Shares 19,539 Value ($000) $166 Avg Close — Range —
Q2 2015
Shares 8,948 Value ($000) $111 Avg Close — Range —
Q1 2015
Shares 100 Value ($000) $1 Avg Close — Range —
Q4 2014
Shares 1,763 Value ($000) $20 Avg Close — Range —
Q1 2014
Shares 1,856 Value ($000) $9 Avg Close — Range —
Q4 2013
Shares 554 Value ($000) $3 Avg Close — Range —
Q3 2013
Shares 5,913 Value ($000) $22 Avg Close — Range —
Q2 2013
Shares 3,168 Value ($000) $21 Avg Close — Range —