MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

RA CAPITAL MANAGEMENT, L.P.'s Holding History (CIK: 0001346824)

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

Q2 2015
Shares 116,400 Value ($000) $1,439 Avg Close — Range —
Q1 2015
Shares 116,400 Value ($000) $1,383 Avg Close — Range —
Q4 2014
Shares 116,400 Value ($000) $1,315 Avg Close — Range —
Q3 2014
Shares 116,400 Value ($000) $1,022 Avg Close — Range —