WATER ISLAND CAPITAL LLC

Q3 2026 13F-HR Holdings

Location
New York, NY
Holdings as of
9/30/2026
Date filed
11/13/2026
Form type
13F-HR
Num holdings
81
Total value ($000)
$1,009,017
Net value change ($000)
-66,066 (-6.1%)
New positions
32
Sold out positions
31
Turnover %
90.1%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/14/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q2 2026
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
ITGR 30,593 NEW
LXP 30,230 NEW
BZH 28,657 NEW
MKTX 28,245 NEW
BLFS 27,817 NEW
DV 22,171 NEW
ARX 21,052 NEW
PEN 19,286 40.6%
ACVA 19,080 NEW
SLAB 17,462 53.9%
Top Reduces (Value $000, Stocks/ETFs)
TMHC -52,190 -100.0%
EA -51,861 -100.0%
GTLS -49,644 -100.0%
JANUS HENDERSON GROUP PLC -46,328 -100.0%
WBS -33,412 -100.0%
NSA -32,394 -100.0%
CPRX -29,350 -100.0%
WSR -23,277 -100.0%
BLD -21,841 -100.0%
DBRG -21,719 -100.0%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 62,011 (6.1% of total reported value)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type