MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

Joel Isaacson & Co., LLC's Holding History (CIK: 0001599330)

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

Q2 2013
Shares 7,305 Value ($000) $49 Avg Close — Range —
Q1 2013
Shares 14,305 Value ($000) $87 Avg Close — Range —
Q4 2012
Shares 14,305 Value ($000) $87 Avg Close — Range —