CORE MARK HOLDING CO INC

CUSIP: 218681104 Class: COMMON STOCK

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

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

Q2 2019
Shares 2,393 Value ($000) $95 Avg Close — Range —
Q1 2019
Shares 1,498 Value ($000) $56 Avg Close — Range —