ALEXION PHARMACEUTICALS INC

CUSIP: 015351109 Class: COM

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q4 2020
Shares 30,189 Value ($000) $4,717 Avg Close Range
Q3 2020
Shares 30,783 Value ($000) $3,522 Avg Close Range
Q2 2020
Shares 31,526 Value ($000) $3,538 Avg Close Range
Q1 2020
Shares 31,573 Value ($000) $2,835 Avg Close Range
Q4 2019
Shares 31,573 Value ($000) $3,415 Avg Close Range
Q3 2019
Shares 31,945 Value ($000) $3,129 Avg Close Range
Q2 2019
Shares 31,980 Value ($000) $4,189 Avg Close Range
Q1 2019
Shares 31,881 Value ($000) $4,310 Avg Close Range
Q4 2018
Shares 31,453 Value ($000) $3,062 Avg Close Range
Q3 2018
Shares 31,329 Value ($000) $4,355 Avg Close Range
Q2 2018
Shares 31,217 Value ($000) $3,876 Avg Close Range
Q1 2018
Shares 30,880 Value ($000) $3,442 Avg Close Range
Q4 2017
Shares 31,119 Value ($000) $3,722 Avg Close Range
Q3 2017
Shares 30,982 Value ($000) $4,346 Avg Close Range
Q2 2017
Shares 31,166 Value ($000) $3,792 Avg Close Range
Q1 2017
Shares 31,040 Value ($000) $3,763 Avg Close Range
Q4 2016
Shares 30,676 Value ($000) $3,753 Avg Close Range
Q2 2016
Shares 30,174 Value ($000) $3,523 Avg Close Range
Q1 2016
Shares 30,009 Value ($000) $4,178 Avg Close Range
Q4 2015
Shares 29,436 Value ($000) $5,615 Avg Close Range
Q3 2015
Shares 29,261 Value ($000) $4,576 Avg Close Range
Q2 2015
Shares 28,830 Value ($000) $5,212 Avg Close Range
Q1 2015
Shares 26,034 Value ($000) $4,512 Avg Close Range
Q4 2014
Shares 95,222 Value ($000) $17,619 Avg Close Range
Q3 2014
Shares 95,370 Value ($000) $15,814 Avg Close Range
Q2 2014
Shares 95,417 Value ($000) $14,909 Avg Close Range
Q1 2014
Shares 106,725 Value ($000) $16,236 Avg Close Range
Q4 2013
Shares 136,645 Value ($000) $18,182 Avg Close Range
Q3 2013
Shares 141,633 Value ($000) $16,452 Avg Close Range
Q2 2013
Shares 183,930 Value ($000) $16,966 Avg Close Range