MDC PARTNERS INC

CUSIP: 552697104 Class: CL A SUB VTG

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

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

Q2 2021
Shares 3,400 Value ($000) $20 Avg Close — Range —
Q1 2021
Shares 1,900 Value ($000) $6 Avg Close — Range —
Q2 2019
Shares 3,500 Value ($000) $9 Avg Close — Range —
Q4 2017
Shares 6,500 Value ($000) $63 Avg Close — Range —
Q2 2017
Shares 1,952 Value ($000) $19 Avg Close — Range —
Q1 2017
Shares 15,269 Value ($000) $144 Avg Close — Range —
Q4 2016
Shares 25,576 Value ($000) $168 Avg Close — Range —