WATER ISLAND CAPITAL LLC
13F filer · CIK 1222765 · New York, NY
Summary
WATER ISLAND CAPITAL LLC reported $1.08B across 85 positions in its 13F for 2026 Q2, filed Aug 14, 2026. The largest holdings are TMHC (4.9%), EA (4.8%), GTLS (4.6%). Versus 2026 Q1, leaving options aside, it opened 35 new positions, added to 24, trimmed 13 and sold out of 46.
Reported value$1.08B
Positions85incl. options
Report period2026 Q2
FiledAug 14, 2026
New positions35
Added24
Trimmed13
Sold out46
Top 25 holdings
By reported value, options listed separately · change vs 2026 Q1
Weight 4.9%Value $52.19MPrice $72.45Shares 727KSince Jun 30 +0.99%
Weight 4.8%Value $51.86MPrice $209.70Shares 253K +1.22%Since Jun 30 +2.27%
Weight 4.6%Value $49.64MPrice $209.90Shares 238K +25.09%Since Jun 30 +0.46%
Weight 4.4%Value $47.51MPrice $318.86Shares 150K +25.28%Since Jun 30 +0.98%
Weight 4.3%Value $46.40MPrice $30.85Shares 1.74M +7.63%Since Jun 30 +15.72%
Weight 4.3%Value $46.33MPrice $51.95Shares 891K -3.40%Since Jun 30 -0.10%
Weight 4.3%Value $46.02MPrice $313.00Shares 146K +9.12%Since Jun 30 -0.51%
Weight 3.9%Value $41.89MPrice $58.50Shares 738K +9.32%Since Jun 30 +3.03%
Weight 3.7%Value $39.63MPrice $29.62Shares 1.31M +4351.10%Since Jun 30 -1.86%
Weight 3.1%Value $33.41MPrice $77.57Shares 437K +5.14%Since Jun 30 +1.50%
Weight 3.0%Value $32.39MPrice $43.41Shares 728K +26.42%Since Jun 30 -2.38%
Weight 3.0%Value $32.38MPrice $221.17Shares 148K +153.59%Since Jun 30 +1.19%
Weight 2.8%Value $30.31MPrice $37.65Shares 805KSince Jun 30 +0.03%
Weight 2.7%Value $29.35MPrice $31.49Shares 934KSince Jun 30 +0.19%
Weight 2.4%Value $26.03MPrice $60.64Shares 381KSince Jun 30 -11.20%
Weight 2.3%Value $25.22MPrice $146.00Shares 174KSince Jun 30 +0.49%
Weight 2.2%Value $23.72MPrice $72.38Shares 336KSince Jun 30 +2.45%
Weight 2.2%Value $23.28MPrice $18.99Shares 1.23MSince Jun 30 +0.16%
Weight 2.1%Value $22.78MPrice $152.14Shares 165KSince Jun 30 +10.13%
Weight 2.0%Value $21.84MPrice $354.53Shares 51KSince Jun 30 -16.81%
Weight 2.0%Value $21.72MPrice $16.00Shares 1.38M +5.95%Since Jun 30 +1.39%
Weight 1.8%Value $19.88MPrice $24.99Shares 799KSince Jun 30 +0.44%
Weight 1.8%Value $18.94MPrice $30.36Shares 624K
Weight 1.7%Value $18.62MPrice $13.74Shares 1.37MSince Jun 30 +1.48%
Weight 1.4%Value $15.07MPrice $39.32Shares 383K -11.13%
| Stock | Weight | Value | Since Jun 30 | Shares change | Action |
|---|---|---|---|---|---|
| 4.9% | $52.19M | +0.99% | — | New | |
| 4.8% | $51.86M | +2.27% | +1.22% | Add | |
| 4.6% | $49.64M | +0.46% | +25.09% | Add | |
| 4.4% | $47.51M | +0.98% | +25.28% | Add | |
| 4.3% | $46.40M | +15.72% | +7.63% | Add | |
| 4.3% | $46.33M | -0.10% | -3.40% | Trim | |
| 4.3% | $46.02M | -0.51% | +9.12% | Add | |
| 3.9% | $41.89M | +3.03% | +9.32% | Add | |
| 3.7% | $39.63M | -1.86% | +4351.10% | Add | |
| 3.1% | $33.41M | +1.50% | +5.14% | Add | |
| 3.0% | $32.39M | -2.38% | +26.42% | Add | |
| 3.0% | $32.38M | +1.19% | +153.59% | Add | |
| 2.8% | $30.31M | +0.03% | — | New | |
| 2.7% | $29.35M | +0.19% | — | New | |
| 2.4% | $26.03M | -11.20% | — | New | |
| 2.3% | $25.22M | +0.49% | — | New | |
| 2.2% | $23.72M | +2.45% | — | New | |
| 2.2% | $23.28M | +0.16% | — | New | |
| 2.1% | $22.78M | +10.13% | — | New | |
| 2.0% | $21.84M | -16.81% | — | New | |
| 2.0% | $21.72M | +1.39% | +5.95% | Add | |
| 1.8% | $19.88M | +0.44% | — | New | |
| 1.8% | $18.94M | — | — | New | |
| 1.7% | $18.62M | +1.48% | — | New | |
| 1.4% | $15.07M | — | -11.13% | Trim |
Weight is the share of the reported 13F value, including options at notional value. “Since Jun 30” compares the latest close with the quarter-end price implied by the filing (value ÷ shares).
Largest buys in 2026 Q2
Largest sells in 2026 Q2
Options
Notional value, listed apart from stocks
WARNER BROS DISCOVERY INCNo ticker matchPUT$40.66MAdd
STATE STR SPDR S&P 500 ETF TNo ticker matchCALL$33.60MNew
ORGANON & CONo ticker matchPUT$13.19MNew
STATE STR SPDR S&P 500 ETF TNo ticker matchPUT$11.20MNew
NUVALENT INCNo ticker matchCALL$10.37MNew
NUVALENT INCNo ticker matchPUT$10.37MNew
LIVERAMP HLDGS INCNo ticker matchPUT$4.41MNew
QXO INCNo ticker matchCALL$3.46MNew
APOGEE THERAPEUTICS INCNo ticker matchPUT$2.32MNew
VARONIS SYS INCNo ticker matchPUT$629.4KNew
Source: SEC Form 13F, values as reported by the filer. Filings lag up to 45 days after quarter end and cover only certain long positions. Research only, not investment advice.