MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q2 2017
Shares 43,640 Value ($000) $54 Avg Close — Range —
Q1 2017
Shares 43,600 Value ($000) $134 Avg Close — Range —
Q4 2016
Shares 43,600 Value ($000) $178 Avg Close — Range —
Q3 2016
Shares 43,600 Value ($000) $277 Avg Close — Range —
Q2 2016
Shares 43,600 Value ($000) $235 Avg Close — Range —
Q1 2016
Shares 31,800 Value ($000) $266 Avg Close — Range —
Q4 2015
Shares 31,800 Value ($000) $251 Avg Close — Range —
Q3 2015
Shares 53,400 Value ($000) $454 Avg Close — Range —
Q2 2015
Shares 43,300 Value ($000) $535 Avg Close — Range —
Q1 2015
Shares 28,500 Value ($000) $339 Avg Close — Range —
Q4 2014
Shares 40,800 Value ($000) $461 Avg Close — Range —
Q3 2014
Shares 25,700 Value ($000) $226 Avg Close — Range —
Q2 2014
Shares 25,700 Value ($000) $187 Avg Close — Range —
Q1 2014
Shares 15,000 Value ($000) $76 Avg Close — Range —
Q4 2013
Shares 15,000 Value ($000) $80 Avg Close — Range —
Q3 2013
Shares 1,347,097 Value ($000) $5,119 Avg Close — Range —