ALKERMES PLC

Ticker: ALKS CUSIP: G01767105 Class: Common Stock

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

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

Q4 2017
Shares 21,000 Value ($000) $1,149 Avg Close $51.03 Range $46.43 - $56.58
Q3 2017
Shares 21,000 Value ($000) $1,067 Avg Close $53.48 Range $48.90 - $61.31
Q2 2017
Shares 21,000 Value ($000) $1,217 Avg Close $58.09 Range $53.64 - $63.40
Q1 2017
Shares 22,000 Value ($000) $1,287 Avg Close $56.71 Range $51.08 - $62.50
Q4 2016
Shares 31,000 Value ($000) $1,723 Avg Close $53.46 Range $41.93 - $60.74
Q3 2016
Shares 63,450 Value ($000) $2,984 Avg Close $47.55 Range $43.26 - $52.27
Q2 2016
Shares 60,000 Value ($000) $2,593 Avg Close $41.26 Range $33.31 - $47.90
Q4 2015
Shares 25,500 Value ($000) $2,025 Avg Close $70.02 Range $54.36 - $80.71