ALEXION PHARMACEUTICALS INC

CUSIP: 015351109 Class: COM

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

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

Q2 2021
Shares 4,828 Value ($000) $887 Avg Close — Range —
Q4 2019
Shares 27,784 Value ($000) $3,005 Avg Close — Range —
Q3 2019
Shares 28,271 Value ($000) $2,769 Avg Close — Range —
Q2 2019
Shares 3,226 Value ($000) $423 Avg Close — Range —
Q4 2018
Shares 16,518 Value ($000) $1,608 Avg Close — Range —
Q3 2018
Shares 6,723 Value ($000) $935 Avg Close — Range —
Q2 2018
Shares 44,727 Value ($000) $5,553 Avg Close — Range —
Q1 2018
Shares 11,074 Value ($000) $1,234 Avg Close — Range —
Q4 2017
Shares 31,326 Value ($000) $3,746 Avg Close — Range —
Q3 2017
Shares 96,837 Value ($000) $13,585 Avg Close — Range —
Q2 2017
Shares 132,640 Value ($000) $16,138 Avg Close — Range —
Q1 2017
Shares 18,768 Value ($000) $2,275 Avg Close — Range —
Q4 2016
Shares 40,294 Value ($000) $4,930 Avg Close — Range —