MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

JANE STREET GROUP, LLC's Holding History (CIK: 0001595888)

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

Q2 2016
Shares 17,755 Value ($000) $96 Avg Close — Range —
Q1 2016
Shares 44,820 Value ($000) $375 Avg Close — Range —
Q4 2015
Shares 10,774 Value ($000) $85 Avg Close — Range —
Q3 2015
Shares 72,591 Value ($000) $618 Avg Close — Range —
Q2 2015
Shares 23,795 Value ($000) $294 Avg Close — Range —
Q1 2015
Shares 17,463 Value ($000) $207 Avg Close — Range —
Q3 2014
Shares 322,161 Value ($000) $2,829 Avg Close — Range —
Q1 2014
Shares 35,390 Value ($000) $178 Avg Close — Range —