ALEXION PHARMACEUTICALS INC

CUSIP: 015351109 Class: COM

GATEWAY INVESTMENT ADVISERS LLC's Holding History (CIK: 0001114618)

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

Q2 2021
Shares 1,923 Value ($000) $353 Avg Close — Range —
Q1 2021
Shares 1,974 Value ($000) $302 Avg Close — Range —
Q4 2020
Shares 2,029 Value ($000) $317 Avg Close — Range —
Q3 2020
Shares 2,146 Value ($000) $246 Avg Close — Range —
Q2 2020
Shares 2,290 Value ($000) $257 Avg Close — Range —
Q1 2020
Shares 3,008 Value ($000) $270 Avg Close — Range —
Q4 2019
Shares 2,747 Value ($000) $297 Avg Close — Range —
Q3 2019
Shares 3,145 Value ($000) $308 Avg Close — Range —
Q2 2019
Shares 9,402 Value ($000) $1,231 Avg Close — Range —
Q1 2019
Shares 9,766 Value ($000) $1,320 Avg Close — Range —
Q4 2018
Shares 138,600 Value ($000) $13,494 Avg Close — Range —
Q3 2018
Shares 138,110 Value ($000) $19,199 Avg Close — Range —
Q2 2018
Shares 138,397 Value ($000) $17,182 Avg Close — Range —
Q1 2018
Shares 141,829 Value ($000) $15,808 Avg Close — Range —
Q4 2017
Shares 143,199 Value ($000) $17,125 Avg Close — Range —
Q3 2017
Shares 140,338 Value ($000) $19,688 Avg Close — Range —
Q2 2017
Shares 154,531 Value ($000) $18,802 Avg Close — Range —
Q1 2017
Shares 140,553 Value ($000) $17,041 Avg Close — Range —
Q4 2016
Shares 166,404 Value ($000) $20,360 Avg Close — Range —
Q3 2016
Shares 168,627 Value ($000) $20,664 Avg Close — Range —
Q2 2016
Shares 184,840 Value ($000) $21,582 Avg Close — Range —
Q1 2016
Shares 161,808 Value ($000) $22,527 Avg Close — Range —
Q4 2015
Shares 161,635 Value ($000) $30,832 Avg Close — Range —
Q3 2015
Shares 168,402 Value ($000) $26,336 Avg Close — Range —
Q2 2015
Shares 142,398 Value ($000) $25,741 Avg Close — Range —
Q1 2015
Shares 142,512 Value ($000) $24,697 Avg Close — Range —
Q4 2014
Shares 142,427 Value ($000) $26,353 Avg Close — Range —
Q3 2014
Shares 123,590 Value ($000) $20,494 Avg Close — Range —
Q2 2014
Shares 106,591 Value ($000) $16,655 Avg Close — Range —
Q1 2014
Shares 72,241 Value ($000) $10,990 Avg Close — Range —
Q4 2013
Shares 22,158 Value ($000) $2,948 Avg Close — Range —
Q3 2013
Shares 23,085 Value ($000) $2,682 Avg Close — Range —
Q2 2013
Shares 20,905 Value ($000) $1,928 Avg Close — Range —