DOSSIER · 13F-HR · Q4 2025
WATER ISLAND CAPITAL LLC
WATER ISLAND's hedge fund based in New York, NY — $928M in tracked AUM across 91 positions as of Q4 2025.
WI
WATER ISLAND·New York, NY·Hedge Fund
CIK 0001222765 · last filed Dec 31, 2025
AI Analysis · Q4 2025 · Q4 2025
Portfolio Overview
Water Island Capital reports a $573.16 million long-equity portfolio as of 2025-09-30, down 18.4% from $701.99 million on 2025-06-30. The filing lists 60 holdings with very high turnover: 37 new positions and 37 sold positions versus the prior quarter, plus only 3 net stake increases and 2 reductions. The portfolio is highly concentrated: the top 10 holdings account for roughly $266.2M, or ~46.5% of the portfolio, and the largest single position (CyberArk) is $41.45M, or 7.2...
Quarter at a glance — Q4 2025
Position-change comparison pending.
No quarter-over-quarter changes available.
Top 10 holdings
By portfolio weight as of Q4 2025.
Filing history
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