ALEXION PHARMACEUTICALS INC

CUSIP: 015351109 Class: COM

Palo Alto Investors LP's Holding History (CIK: 0001306923)

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

Q2 2021
Shares 94,850 Value ($000) $17,425 Avg Close — Range —
Q1 2021
Shares 235,276 Value ($000) $35,976 Avg Close — Range —
Q4 2020
Shares 503,429 Value ($000) $78,656 Avg Close — Range —
Q3 2020
Shares 457,529 Value ($000) $52,355 Avg Close — Range —
Q2 2020
Shares 444,629 Value ($000) $49,905 Avg Close — Range —
Q1 2020
Shares 642,491 Value ($000) $57,689 Avg Close — Range —
Q4 2019
Shares 878,100 Value ($000) $94,967 Avg Close — Range —
Q3 2019
Shares 957,950 Value ($000) $93,822 Avg Close — Range —
Q2 2019
Shares 1,023,780 Value ($000) $134,095 Avg Close — Range —
Q1 2019
Shares 1,229,030 Value ($000) $166,140 Avg Close — Range —
Q4 2018
Shares 1,204,328 Value ($000) $117,253 Avg Close — Range —
Q3 2018
Shares 1,200,201 Value ($000) $166,840 Avg Close — Range —
Q2 2018
Shares 1,186,427 Value ($000) $147,295 Avg Close — Range —
Q1 2018
Shares 1,135,845 Value ($000) $126,601 Avg Close — Range —
Q4 2017
Shares 1,117,642 Value ($000) $133,659 Avg Close — Range —
Q3 2017
Shares 1,080,342 Value ($000) $151,561 Avg Close — Range —
Q2 2017
Shares 1,030,942 Value ($000) $125,435 Avg Close — Range —
Q1 2017
Shares 1,027,060 Value ($000) $124,521 Avg Close — Range —
Q4 2016
Shares 713,742 Value ($000) $87,326 Avg Close — Range —
Q3 2016
Shares 561,700 Value ($000) $68,831 Avg Close — Range —
Q2 2016
Shares 339,400 Value ($000) $39,628 Avg Close — Range —