Institutions / Water Island Capital LLC
Water Island Capital LLC
CIK 1222765 · Institution · as of Mar 31, 2026
Portfolio value
$750.12M
Positions
86
As of
Mar 31, 2026
Portfolio trend
Portfolio value
$750.12M-8.4%Positions
86+14.7%Top holdings
Mar 31, 2026View all 86 →
| Company | Value | % of portfolio |
|---|---|---|
| Electronic Arts Inc. | $50.94M | 6.8% |
| Janus Henderson Group PLC | $47.38M | 6.3% |
| Warner Bros. Discovery, Inc. | $44.40M | 5.9% |
| Hologic Inc | $42.33M | 5.6% |
| Helix Acquisition Corp. III | $39.45M | 5.3% |
| Penumbra Inc | $39.44M | 5.3% |
| Chart Industries Inc | $39.27M | 5.2% |
| Norfolk Southern Corp | $38.47M | 5.1% |
| Masimo Corporation | $34.54M | 4.6% |
| Webster Financial Corp | $28.87M | 3.8% |
| Tri Pointe Homes, Inc. | $25.06M | 3.3% |
| National Storage Affiliates Trust | $21.75M | 2.9% |
| Great Lakes Dredge & Dock Corp | $21.48M | 2.9% |
| Arcellx, Inc. | $21.06M | 2.8% |
| Day One Biopharmaceuticals, Inc. | $20.24M | 2.7% |
| DigitalBridge Group, Inc. | $20.03M | 2.7% |
| Stellar Bancorp, Inc. | $15.79M | 2.1% |
| Enhabit, Inc. | $13.87M | 1.8% |
| Silicon Laboratories Inc | $12.16M | 1.6% |
| Kenvue Inc. | $12.08M | 1.6% |
| Veris Residential, Inc. | $11.27M | 1.5% |
| Peakstone Realty Trust | $10.52M | 1.4% |
| Terns Pharmaceuticals, Inc. | $9.94M | 1.3% |
| Kennedy-Wilson Holdings, Inc. | $8.93M | 1.2% |
| Zim Integrated Shipping Serv | $8.74M | 1.2% |
Activity
Mar 31, 2026View full history →
InsidersInstitutions
This fund's 13F position changes — what it's buying and selling.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Q1 2026 as of | New | Penumbra Inc Common stock | $39.44M | +120K | 120,095 5.26% of portfolio | medium |
| Q1 2026 as of | Exit | M2682V108 Common stock | $-38.65M | -87K -100.00% | 0 | medium |
| Q1 2026 as of | Exit | Exact Sciences Corp. Common stock | $-35.55M | -350K -100.00% | 0 | medium |
| Q1 2026 as of | Exit | CMA Comerica Inc Common Stock | $-34.60M | -398K -100.00% | 0 | medium |
| Q1 2026 as of | New | Masimo Corporation Common stock | $34.54M | +194K | 194,197 4.60% of portfolio | medium |
| Q1 2026 as of | Exit | 171757206 Common stock | $-33.29M | -151K -100.00% | 0 | medium |
| Q1 2026 as of | New | Webster Financial Corp Common stock | $28.87M | +416K | 415,823 3.85% of portfolio | medium |
| Q1 2026 as of | New | Tri Pointe Homes, Inc. Common stock | $25.06M | +536K | 536,367 3.34% of portfolio | medium |
| Q1 2026 as of | Exit | G29687103 Common stock | $-23.43M | -1.1M -100.00% | 0 | medium |
| Q1 2026 as of | Exit | Tegna Inc Common stock | $-22.90M | -1.2M -100.00% | 0 | medium |