MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

OPPENHEIMER & CO INC's Holding History (CIK: 0000822581)

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

Q4 2015
Shares 11,300 Value ($000) $89 Avg Close — Range —
Q2 2015
Shares 47,600 Value ($000) $589 Avg Close — Range —
Q1 2015
Shares 91,400 Value ($000) $1,086 Avg Close — Range —
Q4 2014
Shares 92,800 Value ($000) $1,049 Avg Close — Range —
Q3 2014
Shares 74,100 Value ($000) $650 Avg Close — Range —
Q2 2014
Shares 75,100 Value ($000) $548 Avg Close — Range —
Q1 2014
Shares 111,240 Value ($000) $561 Avg Close — Range —