MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328209 Class: Common Stock

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

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

Q2 2021
Shares 10,500 Value ($000) $67 Avg Close — Range —
Q1 2021
Shares 10,500 Value ($000) $66 Avg Close — Range —