MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

HighTower Advisors, LLC's Holding History (CIK: 0001462245)

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

Q1 2017
Shares 10,800 Value ($000) $33 Avg Close — Range —
Q3 2013
Shares 43,570 Value ($000) $386 Avg Close — Range —