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Rock Springs Capital Management LP

Position in ALKS — Alkermes plc.

CIK 1595725 Baltimore, MD

Position in ALKS

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$10,470,096
+$3,964,352 QoQ
Shares Held
199,811
+8.6% QoQ
Ownership
0.119%
of shares outstanding
% of Portfolio
0.51%
of 13F equity value
Holder Rank
#89
of 423 holders
Holding Since
Sep 2025
4 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ALKS Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Jun 30, 2026

Rock Springs Capital Management LP holds $59,831,908 across 7 Drug Manufacturers - Specialty & Generic names. ALKS ranks #2 (17.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
2 ALKS
Alkermes plc.
This page
199,811 $10,470,096

All Filings in ALKS

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4 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $10,470,096 199,811
2026-03-31 $6,505,744 183,986
2025-12-31 $3,895,599 139,228
2025-09-30 $3,196,110 106,537