ALKERMES PLC

Ticker: ALKS CUSIP: G01767105 Class: Common Stock

EcoR1 Capital, LLC's Holding History (CIK: 0001587114)

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

Q3 2025

Shares 500,000 Value ($000) $15,000 Avg Close $28.20 Range $25.17 - $31.69

Q2 2025

Shares 500,000 Value ($000) $14,305 Avg Close $29.76 Range $25.56 - $33.48

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	500,000	$15,000	$28.20	$25.17 - $31.69
Q2 2025	500,000	$14,305	$29.76	$25.56 - $33.48