MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

Portolan Capital Management, LLC's Holding History (CIK: 0001350290)

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

Q3 2016
Shares 412,189 Value ($000) $2,617 Avg Close — Range —
Q1 2016
Shares 227,051 Value ($000) $1,900 Avg Close — Range —
Q3 2015
Shares 444,550 Value ($000) $3,783 Avg Close — Range —
Q2 2015
Shares 664,298 Value ($000) $8,214 Avg Close — Range —
Q1 2015
Shares 539,626 Value ($000) $6,411 Avg Close — Range —
Q4 2014
Shares 607,288 Value ($000) $6,862 Avg Close — Range —
Q3 2014
Shares 422,975 Value ($000) $3,714 Avg Close — Range —