ALEXION PHARMACEUTICALS INC

CUSIP: 015351109 Class: COM

Rock Springs Capital Management LP's Holding History (CIK: 0001595725)

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

Q4 2020
Shares 306,750 Value ($000) $47,927 Avg Close — Range —
Q3 2020
Shares 225,000 Value ($000) $25,747 Avg Close — Range —
Q2 2020
Shares 183,500 Value ($000) $20,596 Avg Close — Range —
Q2 2019
Shares 242,500 Value ($000) $31,763 Avg Close — Range —
Q1 2019
Shares 242,500 Value ($000) $32,781 Avg Close — Range —
Q4 2018
Shares 242,500 Value ($000) $23,610 Avg Close — Range —
Q3 2018
Shares 300,000 Value ($000) $41,703 Avg Close — Range —
Q2 2018
Shares 492,500 Value ($000) $61,144 Avg Close — Range —
Q1 2018
Shares 485,000 Value ($000) $54,058 Avg Close — Range —
Q4 2017
Shares 480,000 Value ($000) $57,403 Avg Close — Range —
Q3 2017
Shares 463,000 Value ($000) $64,954 Avg Close — Range —
Q2 2017
Shares 463,000 Value ($000) $56,333 Avg Close — Range —
Q1 2017
Shares 456,900 Value ($000) $55,395 Avg Close — Range —
Q4 2016
Shares 465,000 Value ($000) $56,893 Avg Close — Range —
Q3 2016
Shares 267,250 Value ($000) $32,749 Avg Close — Range —
Q2 2016
Shares 235,500 Value ($000) $27,497 Avg Close — Range —
Q1 2016
Shares 227,750 Value ($000) $31,707 Avg Close — Range —
Q4 2015
Shares 193,000 Value ($000) $36,815 Avg Close — Range —
Q3 2015
Shares 172,000 Value ($000) $26,899 Avg Close — Range —
Q2 2015
Shares 154,500 Value ($000) $27,929 Avg Close — Range —
Q1 2015
Shares 108,250 Value ($000) $18,760 Avg Close — Range —
Q4 2014
Shares 92,500 Value ($000) $17,115 Avg Close — Range —
Q3 2014
Shares 89,750 Value ($000) $14,882 Avg Close — Range —
Q2 2014
Shares 85,750 Value ($000) $13,398 Avg Close — Range —
Q1 2014
Shares 48,500 Value ($000) $7,378 Avg Close — Range —
Q4 2013
Shares 51,000 Value ($000) $6,786 Avg Close — Range —