MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

Fortress Investment Group LLC's Holding History (CIK: 0001380393)

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

Q3 2013
Shares 182,292 Value ($000) $693 Avg Close — Range —
Q2 2013
Shares 158,000 Value ($000) $1,063 Avg Close — Range —