Data as of Q4 2025 (Dec 31, 2025)

WATER ISLAND CAPITAL LLC

โ€ขCIK: 1222765โ€ขFiling: Q4 2025

**WATER ISLAND CAPITAL LLC** manages $928M across a portfolio of 91 positions. The fund maintains significant, concentrated exposure across several key names, notably allocating $38.8M to GTLS and $38.7M to UBS. Further top holdings include NSC ($37.3M), EA ($37.0M), and EXK ($35.5M), indicating a focused, large-cap equity mandate. This structure suggests a conviction-driven approach targeting established market leaders.

Total AUM
$765.8M
+ $109.0M in options
QoQ Performance
+18.4%
Positions
61
+ 14 options
Top 10 Concentration
40.8%
Latest Filing
Q4 2025

Top Holdings Allocation

GTLS4.4%
CYBR4.4%
NSC4.3%
EA4.2%
EXK4.1%
HOLX4.0%
CMA4.0%
TXNM3.9%

๐Ÿ“ˆ Biggest Buys

EXK
Exact Sciences Corp
NEW
4.1% of portfolio
HOLX
Hologic Inc
NEW
4.0% of portfolio
CMA
Comerica Inc
NEW
4.0% of portfolio
CDTX
Cidara Therapeutics Inc
NEW
3.8% of portfolio
WBD
Warner Bros Discovery Inc
NEW
3.8% of portfolio

๐Ÿ“‰ Biggest Sells

STAA
STAAR Surgical Co
-89.7%
0.2% of portfolio
DAY
Dayforce Inc
-74.2%
0.4% of portfolio
โ€”PUT
Anywhere Real Estate Inc
-84.4%
0.1% of portfolio
PRA
ProAssurance Corp
-77.7%
0.1% of portfolio
โ€”
Aspen Insurance Holdings Ltd
-7.7%
2.4% of portfolio

Sector Breakdown

Other98.1%
ETF1.9%

๐Ÿšช Exited Positionssold since Q3 2025

VRNA
VERONA PHARMA PLC
SOLD
$31.0M
AVDX
AVIDXCHANGE HOLDINGS INC
SOLD
$28.7M
INFA1EUR
INFORMATICA INC
SOLD
$28.6M
VBTX
VERITEX HLDGS INC
SOLD
$27.4M
VTY
VERINT SYS INC
SOLD
$24.4M
+43 more exited positions

Changes from Q3 2025

NEW56 new positions
โ†‘10 increased
โ†“10 decreased

Historical Filings

Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023