ALKERMES PLC

Ticker: ALKS CUSIP: G01767105 Class: Common Stock

RA CAPITAL MANAGEMENT, L.P.'s Holding History (CIK: 0001346824)

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

Q2 2015

Shares 19,200 Value ($000) $1,235 Avg Close $61.20 Range $54.54 - $68.23

Q1 2015

Shares 19,200 Value ($000) $1,171 Avg Close $68.32 Range $57.31 - $75.17

Q4 2014

Shares 19,200 Value ($000) $1,124 Avg Close $50.94 Range $38.49 - $59.69

Q3 2014

Shares 19,200 Value ($000) $823 Avg Close $44.82 Range $41.02 - $52.50

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2015	19,200	$1,235	$61.20	$54.54 - $68.23
Q1 2015	19,200	$1,171	$68.32	$57.31 - $75.17
Q4 2014	19,200	$1,124	$50.94	$38.49 - $59.69
Q3 2014	19,200	$823	$44.82	$41.02 - $52.50