Filed: 5/15/2026ACC: 0001222765-26-000007
📋 What this filing means
WATER ISLAND CAPITAL LLC filed this quarterly 13F‑HR report disclosing 98 equity positions with a total reported market value of $895.64M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
98
Positions
$895.64M
Total AUM (reported)
60.87M
Total Shares
Allocation by class
EQUITY$710.81M79.4%
EQUITY PUT$137.83M15.4%
CONVERTIBLE BOND$39.31M4.4%
EQUITY CALL$7.69M0.9%
Portfolio Concentration
Top 3$142.73M15.9%
4–10$264.05M29.5%
11–25$282.57M31.5%
Rest$206.31M23.0%
Top 3 weight
15.9%
Top 10 weight
45.4%
Voting Authority Distribution
Total shares with voting rights: 60.87M
Sole
Full voting authority
60.87M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole98
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings98
Rows:
ELECTRONIC ARTS INC
SOLEShares249.89K
TypeSH
Market value$50.94M
5.69%
Sole
249.89K
Shared
0.00
None
0.00
JANUS HENDERSON GROUP PLC
SOLEShares922.28K
TypeSH
Market value$47.38M
5.29%
Sole
922.28K
Shared
0.00
None
0.00
WARNER BROS DISCOVERY INC
SOLEShares1.62M
TypeSH
Market value$44.40M
4.96%
Sole
1.62M
Shared
0.00
None
0.00
HOLOGIC INC
SOLEShares560.04K
TypeSH
Market value$42.33M
4.73%
Sole
560.04K
Shared
0.00
None
0.00
TXNM ENERGY INC
SOLEShares674.87K
TypeSH
Market value$39.45M
4.40%
Sole
674.87K
Shared
0.00
None
0.00
PENUMBRA INC
SOLEShares120.09K
TypeSH
Market value$39.44M
4.40%
Sole
120.09K
Shared
0.00
None
0.00
CHART INDS INC
SOLEShares189.94K
TypeSH
Market value$39.27M
4.38%
Sole
189.94K
Shared
0.00
None
0.00
NORFOLK SOUTHN CORP
SOLEShares134.05K
TypeSH
Market value$38.47M
4.30%
Sole
134.05K
Shared
0.00
None
0.00
MASIMO CORP
SOLEShares194.20K
TypeSH
Market value$34.54M
3.86%
Sole
194.20K
Shared
0.00
None
0.00
ELECTRONIC ARTS INC
SOLEShares149.80K
TypeSH
Market value$30.54M
3.41%
Sole
149.80K
Shared
0.00
None
0.00
WEBSTER FINL CORP
SOLEShares415.82K
TypeSH
Market value$28.87M
3.22%
Sole
415.82K
Shared
0.00
None
0.00
WARNER BROS DISCOVERY INC
SOLEShares1.05M
TypeSH
Market value$28.82M
3.22%
Sole
1.05M
Shared
0.00
None
0.00
TRI POINTE HOMES INC
SOLEShares536.37K
TypeSH
Market value$25.06M
2.80%
Sole
536.37K
Shared
0.00
None
0.00
NATIONAL STORAGE AFFILIATES
SOLEShares576.22K
TypeSH
Market value$21.75M
2.43%
Sole
576.22K
Shared
0.00
None
0.00
GREAT LAKES DREDGE & DOCK CO
SOLEShares1.26M
TypeSH
Market value$21.48M
2.40%
Sole
1.26M
Shared
0.00
None
0.00
ARCELLX INC
SOLEShares183.41K
TypeSH
Market value$21.06M
2.35%
Sole
183.41K
Shared
0.00
None
0.00
DAY ONE BIOPHARMACEUTICALS I
SOLEShares944.25K
TypeSH
Market value$20.24M
2.26%
Sole
944.25K
Shared
0.00
None
0.00
DIGITALBRIDGE GROUP INC
SOLEShares1.30M
TypeSH
Market value$20.03M
2.24%
Sole
1.30M
Shared
0.00
None
0.00
DAY ONE BIOPHARMACEUTICALS I
SOLEShares839.70K
TypeSH
Market value$18.00M
2.01%
Sole
839.70K
Shared
0.00
None
0.00
STELLAR BANCORP INC
SOLEShares431.23K
TypeSH
Market value$15.79M
1.76%
Sole
431.23K
Shared
0.00
None
0.00
ENHABIT INC
SOLEShares984.61K
TypeSH
Market value$13.87M
1.55%
Sole
984.61K
Shared
0.00
None
0.00
SILICON LABORATORIES INC
SOLEShares58.42K
TypeSH
Market value$12.16M
1.36%
Sole
58.42K
Shared
0.00
None
0.00
KENVUE INC
SOLEShares700.60K
TypeSH
Market value$12.08M
1.35%
Sole
700.60K
Shared
0.00
None
0.00
KENVUE INC
SOLEShares700.60K
TypeSH
Market value$12.08M
1.35%
Sole
700.60K
Shared
0.00
None
0.00
VERIS RESIDENTIAL INC
SOLEShares597.39K
TypeSH
Market value$11.27M
1.26%
Sole
597.39K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
ELECTRONIC ARTS INCSOLE | Equity | 249.89K | SH | $50.94M 5.69% | 249.89K | 0.00 | 0.00 |
JANUS HENDERSON GROUP PLCSOLE | Equity | 922.28K | SH | $47.38M 5.29% | 922.28K | 0.00 | 0.00 |
WARNER BROS DISCOVERY INCSOLE | Equity | 1.62M | SH | $44.40M 4.96% | 1.62M | 0.00 | 0.00 |
HOLOGIC INCSOLE | Equity | 560.04K | SH | $42.33M 4.73% | 560.04K | 0.00 | 0.00 |
TXNM ENERGY INCSOLE | Equity | 674.87K | SH | $39.45M 4.40% | 674.87K | 0.00 | 0.00 |
PENUMBRA INCSOLE | Equity | 120.09K | SH | $39.44M 4.40% | 120.09K | 0.00 | 0.00 |
CHART INDS INCSOLE | Equity | 189.94K | SH | $39.27M 4.38% | 189.94K | 0.00 | 0.00 |
NORFOLK SOUTHN CORPSOLE | Equity | 134.05K | SH | $38.47M 4.30% | 134.05K | 0.00 | 0.00 |
MASIMO CORPSOLE | Equity | 194.20K | SH | $34.54M 3.86% | 194.20K | 0.00 | 0.00 |
ELECTRONIC ARTS INCSOLE | Equity Put | 149.80K | SH | $30.54M 3.41% | 149.80K | 0.00 | 0.00 |
WEBSTER FINL CORPSOLE | Equity | 415.82K | SH | $28.87M 3.22% | 415.82K | 0.00 | 0.00 |
WARNER BROS DISCOVERY INCSOLE | Equity Put | 1.05M | SH | $28.82M 3.22% | 1.05M | 0.00 | 0.00 |
TRI POINTE HOMES INCSOLE | Equity | 536.37K | SH | $25.06M 2.80% | 536.37K | 0.00 | 0.00 |
NATIONAL STORAGE AFFILIATESSOLE | Equity | 576.22K | SH | $21.75M 2.43% | 576.22K | 0.00 | 0.00 |
GREAT LAKES DREDGE & DOCK COSOLE | Equity | 1.26M | SH | $21.48M 2.40% | 1.26M | 0.00 | 0.00 |
ARCELLX INCSOLE | Equity | 183.41K | SH | $21.06M 2.35% | 183.41K | 0.00 | 0.00 |
DAY ONE BIOPHARMACEUTICALS ISOLE | Equity | 944.25K | SH | $20.24M 2.26% | 944.25K | 0.00 | 0.00 |
DIGITALBRIDGE GROUP INCSOLE | Equity | 1.30M | SH | $20.03M 2.24% | 1.30M | 0.00 | 0.00 |
DAY ONE BIOPHARMACEUTICALS ISOLE | Equity Put | 839.70K | SH | $18.00M 2.01% | 839.70K | 0.00 | 0.00 |
STELLAR BANCORP INCSOLE | Equity | 431.23K | SH | $15.79M 1.76% | 431.23K | 0.00 | 0.00 |
ENHABIT INCSOLE | Equity | 984.61K | SH | $13.87M 1.55% | 984.61K | 0.00 | 0.00 |
SILICON LABORATORIES INCSOLE | Equity | 58.42K | SH | $12.16M 1.36% | 58.42K | 0.00 | 0.00 |
KENVUE INCSOLE | Equity | 700.60K | SH | $12.08M 1.35% | 700.60K | 0.00 | 0.00 |
KENVUE INCSOLE | Equity Put | 700.60K | SH | $12.08M 1.35% | 700.60K | 0.00 | 0.00 |
VERIS RESIDENTIAL INCSOLE | Equity | 597.39K | SH | $11.27M 1.26% | 597.39K | 0.00 | 0.00 |
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