ALEXION PHARMACEUTICALS INC

CUSIP: 015351109 Class: COM

TOCQUEVILLE ASSET MANAGEMENT L.P.'s Holding History (CIK: 0000883961)

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

Q4 2016
Shares 66,460 Value ($000) $8,131 Avg Close — Range —
Q3 2016
Shares 45,325 Value ($000) $5,554 Avg Close — Range —
Q2 2016
Shares 39,235 Value ($000) $4,581 Avg Close — Range —
Q1 2016
Shares 62,110 Value ($000) $8,647 Avg Close — Range —
Q4 2015
Shares 49,590 Value ($000) $9,459 Avg Close — Range —
Q3 2015
Shares 50,540 Value ($000) $7,904 Avg Close — Range —
Q2 2015
Shares 44,225 Value ($000) $7,995 Avg Close — Range —
Q1 2015
Shares 42,075 Value ($000) $7,292 Avg Close — Range —
Q4 2014
Shares 41,915 Value ($000) $7,756 Avg Close — Range —
Q3 2014
Shares 43,940 Value ($000) $7,286 Avg Close — Range —
Q2 2014
Shares 43,365 Value ($000) $6,776 Avg Close — Range —
Q1 2014
Shares 39,565 Value ($000) $6,019 Avg Close — Range —
Q4 2013
Shares 43,005 Value ($000) $5,715 Avg Close — Range —
Q3 2013
Shares 41,705 Value ($000) $4,844 Avg Close — Range —
Q2 2013
Shares 39,990 Value ($000) $3,689 Avg Close — Range —