MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328209 Class: Common Stock

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q1 2018
Shares 20,677 Value ($000) $166 Avg Close — Range —
Q4 2017
Shares 20,677 Value ($000) $212 Avg Close — Range —
Q3 2017
Shares 18,087 Value ($000) $263 Avg Close — Range —