MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328209 Class: Common Stock

Paloma Partners Management Co's Holding History (CIK: 0001103882)

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

Q2 2018
Shares 62,600 Value ($000) $307 Avg Close — Range —
Q1 2018
Shares 13,056 Value ($000) $105 Avg Close — Range —
Q4 2017
Shares 22,156 Value ($000) $227 Avg Close — Range —