MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

PERCEPTIVE ADVISORS LLC's Holding History (CIK: 0001224962)

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

Q4 2016
Shares 48,910 Value ($000) $200 Avg Close — Range —
Q3 2016
Shares 48,910 Value ($000) $311 Avg Close — Range —
Q2 2016
Shares 50,000 Value ($000) $270 Avg Close — Range —
Q1 2016
Shares 50,000 Value ($000) $419 Avg Close — Range —
Q4 2015
Shares 50,000 Value ($000) $395 Avg Close — Range —