ALEXION PHARMACEUTICALS INC

CUSIP: 015351109 Class: COM

Atika Capital Management LLC's Holding History (CIK: 0001599731)

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

Q4 2014
Shares 5,000 Value ($000) $925 Avg Close — Range —
Q2 2014
Shares 12,000 Value ($000) $1,875 Avg Close — Range —