MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328209 Class: Common Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2023
Shares 236 Value ($000) $3 Avg Close — Range —
Q3 2023
Shares 4,528 Value ($000) $56 Avg Close — Range —
Q3 2022
Shares 11,930 Value ($000) $45 Avg Close — Range —
Q2 2022
Shares 15,555 Value ($000) $93 Avg Close — Range —
Q1 2022
Shares 10,586 Value ($000) $67 Avg Close — Range —
Q3 2021
Shares 31,535 Value ($000) $152 Avg Close — Range —
Q2 2021
Shares 34,493 Value ($000) $220 Avg Close — Range —
Q4 2019
Shares 22,621 Value ($000) $71 Avg Close — Range —
Q2 2019
Shares 685 Value ($000) $4 Avg Close — Range —
Q1 2019
Shares 785 Value ($000) $5 Avg Close — Range —
Q4 2018
Shares 785 Value ($000) $3 Avg Close — Range —
Q3 2018
Shares 6,084 Value ($000) $32 Avg Close — Range —
Q2 2018
Shares 23,045 Value ($000) $113 Avg Close — Range —
Q1 2018
Shares 417 Value ($000) $3 Avg Close — Range —
Q3 2017
Shares 538 Value ($000) $8 Avg Close — Range —