ALEXION PHARMACEUTICALS INC

CUSIP: 015351109 Class: COM

Senator Investment Group LP's Holding History (CIK: 0001443689)

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

Q3 2017
Shares 550,000 Value ($000) $77,160 Avg Close — Range —
Q2 2017
Shares 675,000 Value ($000) $82,127 Avg Close — Range —
Q1 2017
Shares 750,000 Value ($000) $90,930 Avg Close — Range —
Q4 2016
Shares 400,000 Value ($000) $48,940 Avg Close — Range —
Q3 2016
Shares 400,000 Value ($000) $49,016 Avg Close — Range —
Q2 2016
Shares 325,000 Value ($000) $37,947 Avg Close — Range —