Sponsored

The Analysis of WATER ISLAND CAPITAL LLC's Holdings & P&L

Currently, WATER ISLAND CAPITAL LLC holds 86 types of securities in its portfolio with a total value $750.1M. In the most recent quarter, they have increased their positions in PEN (+120.1K shares, valued at $39.4M), MASI (+194.2K shares, valued at $34.5M), WBS (+415.8K shares, valued at $28.9M); decreased their positions in SEE (-503.2K shares, valued at $21.2M), CWAN (-766.0K shares, valued at $18.1M), AL (-225.3K shares, valued at $14.6M); initiated new positions in PEN (+120.1K shares, valued at $39.4M), MASI (+194.2K shares, valued at $34.5M), WBS (+415.8K shares, valued at $28.9M).

1M P&L

+2.2M+0.79%

3M P&L

-8.1M-2.85%

HY P&L

+11.9M+4.48%

P&L figures are estimated based on reported 13F stock holdings and market price changes. They are approximations and may not reflect actual fund performance. Stock split events may also affect the accuracy of these calculations, and we cannot guarantee that all splits have been fully accounted for.

Top Holding Treemap

Top Industries by Value

1Software - Infrastructure70.9M

10.4%

2Banks - Regional56.7M

8.3%

3Specialty Industrial Machinery51.5M

7.5%

Top Industries by Stock Count

1Banks - Regional6 stocks

10.5%

2Software - Application4 stocks

7.0%

3Software - Infrastructure4 stocks

7.0%

Sponsored

Stock Holdings

TickerCompany NameSharesShares △%Event DateReport DateHistory

EA ELECTRONIC ARTS INC249.9K shares38.18%2026-03-312026-05-15

JHG JANUS HENDERSON GROUP PLC922.3K shares42.44%2026-03-312026-05-15

WBD WARNER BROS DISCOVERY INC1.6M shares41.89%2026-03-312026-05-15

HOLX HOLOGIC INC560.0K shares19.73%2026-03-312026-05-15

TXNM TXNM ENERGY INC674.9K shares17.08%2026-03-312026-05-15

PEN PENUMBRA INC120.1K sharesnew addition2026-03-312026-05-15

GTLS CHART INDS INC189.9K shares0.86%2026-03-312026-05-15

NSC NORFOLK SOUTHN CORP134.1K shares3.88%2026-03-312026-05-15

Sponsored

MASI MASIMO CORP194.2K sharesnew addition2026-03-312026-05-15

WBS WEBSTER FINL CORP415.8K sharesnew addition2026-03-312026-05-15

TPH TRI POINTE HOMES INC536.4K sharesnew addition2026-03-312026-05-15

NSA NATIONAL STORAGE AFFILIATES576.2K sharesnew addition2026-03-312026-05-15

GLDD GREAT LAKES DREDGE & DOCK CO1.3M sharesnew addition2026-03-312026-05-15

ACLX ARCELLX INC183.4K sharesnew addition2026-03-312026-05-15

DAWN DAY ONE BIOPHARMACEUTICALS I944.2K sharesnew addition2026-03-312026-05-15

DIGITALBRIDGE GROUP INC DIGITALBRIDGE GROUP INC1.3M shares39.83%2026-03-312026-05-15

Sponsored

STEL STELLAR BANCORP INC431.2K sharesnew addition2026-03-312026-05-15

EHAB ENHABIT INC984.6K sharesnew addition2026-03-312026-05-15

SLAB SILICON LABORATORIES INC58.4K sharesnew addition2026-03-312026-05-15

KVUE KENVUE INC700.6K shares1.51%2026-03-312026-05-15

VRE VERIS RESIDENTIAL INC597.4K sharesnew addition2026-03-312026-05-15

PKST PEAKSTONE REALTY TRUST503.6K sharesnew addition2026-03-312026-05-15

TERN TERNS PHARMACEUTICALS INC188.5K sharesnew addition2026-03-312026-05-15

KW KENNEDY-WILSON HOLDINGS INC825.7K sharesnew addition2026-03-312026-05-15

Sponsored

ZIM ZIM INTEGRATED SHIPPING SERV331.8K sharesnew addition2026-03-312026-05-15

TXNM ENERGY INC TXNM ENERGY INC6.0M shares100.00%2026-03-312026-05-15

UNF UNIFIRST CORP MASS25.7K sharesnew addition2026-03-312026-05-15

CSG SYS INTL INC CSG SYS INTL INC5.0M shares0.00%2026-03-312026-05-15

AXTA AXALTA COATING SYS LTD206.9K shares0.57%2026-03-312026-05-15

RAPID7 INC RAPID7 INC5.5M shares0.00%2026-03-312026-05-15

APLS APELLIS PHARMACEUTICALS INC120.5K sharesnew addition2026-03-312026-05-15

AL AIR LEASE CORP73.1K shares-75.50%2026-03-312026-05-15

Sponsored

BENTLEY SYS INC BENTLEY SYS INC5.0M shares0.00%2026-03-312026-05-15

NUTANIX INC NUTANIX INC5.0M shares42.86%2026-03-312026-05-15

REDFIN CORP REDFIN CORP4.5M shares0.00%2026-03-312026-05-15

HALOZYME THERAPEUTICS INC HALOZYME THERAPEUTICS INC3.0M shares0.00%2026-03-312026-05-15

AES AES CORP185.8K sharesnew addition2026-03-312026-05-15

VARONIS SYS INC VARONIS SYS INC3.0M shares0.00%2026-03-312026-05-15

CWAN CLEARWATER ANALYTICS HLDGS I109.6K shares-87.48%2026-03-312026-05-15

SEE SEALED AIR CORP NEW56.1K shares-89.97%2026-03-312026-05-15

Sponsored

AAUC ALLIED GOLD CORP72.8K sharesnew addition2026-03-312026-05-15

OS ONESTREAM INC91.1K sharesnew addition2026-03-312026-05-15

BHF BRIGHTHOUSE FINL INC33.5K shares16.12%2026-03-312026-05-15

NATL NCR ATLEOS CORPORATION38.9K sharesnew addition2026-03-312026-05-15

SEM SELECT MED HLDGS CORP103.5K sharesnew addition2026-03-312026-05-15

THR THERMON GROUP HLDGS INC33.0K sharesnew addition2026-03-312026-05-15

SNCY SUN CTRY AIRLS HLDGS INC98.9K sharesnew addition2026-03-312026-05-15

CNTA CENTESSA PHARMACEUTICALS PLC41.0K sharesnew addition2026-03-312026-05-15

Sponsored

CSGS CSG SYS INTL INC20.2K shares-86.58%2026-03-312026-05-15

SEMR SEMRUSH HLDGS INC133.9K shares-78.70%2026-03-312026-05-15

FOLD AMICUS THERAPEUTIC104.1K shares-85.27%2026-03-312026-05-15

BA BOEING CO7.2K sharesnew addition2026-03-312026-05-15

STKL SUNOPTA INC196.5K sharesnew addition2026-03-312026-05-15

PRA PROASSURANCE CORP51.1K shares8.75%2026-03-312026-05-15

CTLP CANTALOUPE INC107.9K shares-18.15%2026-03-312026-05-15

CCO CLEAR CHANNEL OUTDOOR HLDGS478.5K sharesnew addition2026-03-312026-05-15

Sponsored

IHS IHS HOLDING LIMITED137.6K sharesnew addition2026-03-312026-05-15

TALK TALKSPACE INC216.2K sharesnew addition2026-03-312026-05-15

MCW MISTER CAR WASH INC156.5K sharesnew addition2026-03-312026-05-15

DKS DICKS SPORTING GOODS INC5.3K shares386.18%2026-03-312026-05-15

GLADSTONE CAP CORP GLADSTONE CAP CORP1.0M shares-50.00%2026-03-312026-05-15

CTRA COTERRA ENERGY INC27.3K sharesnew addition2026-03-312026-05-15

SKYT SKYWATER TECHNOLOGY INC34.5K sharesnew addition2026-03-312026-05-15

NWE NORTHWESTERN ENERGY GROUP IN13.8K shares-3.28%2026-03-312026-05-15

Sponsored

AMRX AMNEAL PHARMACEUTICALS INC68.4K sharesnew addition2026-03-312026-05-15

CZR CAESARS ENTERTAINMENT INC NE29.5K sharesnew addition2026-03-312026-05-15

UDMY UDEMY INC139.3K shares2.51%2026-03-312026-05-15

EL LAUDER ESTEE COS INC7.5K sharesnew addition2026-03-312026-05-15

PENN PENN ENTERTAINMENT INC35.0K sharesnew addition2026-03-312026-05-15

CVGW CALAVO GROWERS INC20.3K sharesnew addition2026-03-312026-05-15

IMXI INTERNATIONAL MONEY EXPRESS33.1K shares-62.56%2026-03-312026-05-15

NATH NATHANS FAMOUS INC5.0K sharesnew addition2026-03-312026-05-15

Sponsored

ONTF ON24 INC60.4K sharesnew addition2026-03-312026-05-15

HTBK HERITAGE COMM CORP38.0K shares11.99%2026-03-312026-05-15

BLFY BLUE FOUNDRY BANCORP35.7K sharesnew addition2026-03-312026-05-15

SATS ECHOSTAR CORP4.0K sharesnew addition2026-03-312026-05-15

FFIC FLUSHING FINL CORP30.2K sharesnew addition2026-03-312026-05-15

UAL UNITED AIRLS HLDGS INC5.0K sharesnew addition2026-03-312026-05-15

DHIL DIAMOND HILL INVT GROUP INC2.5K shares1.61%2026-03-312026-05-15

FFWM FIRST FNDTN INC67.6K shares2.51%2026-03-312026-05-15

Sponsored

ALK ALASKA AIR GROUP INC10.3K sharesnew addition2026-03-312026-05-15

PACB PACIFIC BIOSCIENCES CALIF IN272.0K sharesnew addition2026-03-312026-05-15

VCTR VICTORY CAP HLDGS INC DEL5.1K sharesnew addition2026-03-312026-05-15

VKTX VIKING THERAPEUTICS INC10.3K sharesnew addition2026-03-312026-05-15

UPS UNITED PARCEL SVCS INC2.5K sharesnew addition2026-03-312026-05-15

PYPL PAYPAL HLDGS INC5.1K sharesnew addition2026-03-312026-05-15

ELECTRONIC ARTS INC

38.18%

Shares249.9K

Event2026-03-31

Filed2026-05-15

JHG

JANUS HENDERSON GROUP PLC

42.44%

Shares922.3K

Event2026-03-31

Filed2026-05-15

WBD

WARNER BROS DISCOVERY INC

41.89%

Shares1.6M

Event2026-03-31

Filed2026-05-15

HOLX

HOLOGIC INC

19.73%

Shares560.0K

Event2026-03-31

Filed2026-05-15

TXNM

TXNM ENERGY INC

17.08%

Shares674.9K

Event2026-03-31

Filed2026-05-15

PEN

PENUMBRA INC

New

Shares120.1K

Event2026-03-31

Filed2026-05-15

GTLS

CHART INDS INC

0.86%

Shares189.9K

Event2026-03-31

Filed2026-05-15

NSC

NORFOLK SOUTHN CORP

3.88%

Shares134.1K

Event2026-03-31

Filed2026-05-15

MASI

MASIMO CORP

New

Shares194.2K

Event2026-03-31

Filed2026-05-15

WBS

WEBSTER FINL CORP

New

Shares415.8K

Event2026-03-31

Filed2026-05-15

TPH

TRI POINTE HOMES INC

New

Shares536.4K

Event2026-03-31

Filed2026-05-15

NSA

NATIONAL STORAGE AFFILIATES

New

Shares576.2K

Event2026-03-31

Filed2026-05-15

GLDD

GREAT LAKES DREDGE & DOCK CO

New

Shares1.3M

Event2026-03-31

Filed2026-05-15

ACLX

ARCELLX INC

New

Shares183.4K

Event2026-03-31

Filed2026-05-15

DAWN

DAY ONE BIOPHARMACEUTICALS I

New

Shares944.2K

Event2026-03-31

Filed2026-05-15

DIGITALBRIDGE GROUP INC

39.83%

Shares1.3M

Event2026-03-31

Filed2026-05-15

STEL

STELLAR BANCORP INC

New

Shares431.2K

Event2026-03-31

Filed2026-05-15

EHAB

ENHABIT INC

New

Shares984.6K

Event2026-03-31

Filed2026-05-15

SLAB

SILICON LABORATORIES INC

New

Shares58.4K

Event2026-03-31

Filed2026-05-15

KVUE

KENVUE INC

1.51%

Shares700.6K

Event2026-03-31

Filed2026-05-15

VRE

VERIS RESIDENTIAL INC

New

Shares597.4K

Event2026-03-31

Filed2026-05-15

PKST

PEAKSTONE REALTY TRUST

New

Shares503.6K

Event2026-03-31

Filed2026-05-15

TERN

TERNS PHARMACEUTICALS INC

New

Shares188.5K

Event2026-03-31

Filed2026-05-15

KENNEDY-WILSON HOLDINGS INC

New

Shares825.7K

Event2026-03-31

Filed2026-05-15

ZIM

ZIM INTEGRATED SHIPPING SERV

New

Shares331.8K

Event2026-03-31

Filed2026-05-15

TXNM ENERGY INC

100.00%

Shares6.0M

Event2026-03-31

Filed2026-05-15

UNF

UNIFIRST CORP MASS

New

Shares25.7K

Event2026-03-31

Filed2026-05-15

CSG SYS INTL INC

0.00%

Shares5.0M

Event2026-03-31

Filed2026-05-15

AXTA

AXALTA COATING SYS LTD

0.57%

Shares206.9K

Event2026-03-31

Filed2026-05-15

RAPID7 INC

0.00%

Shares5.5M

Event2026-03-31

Filed2026-05-15

APLS

APELLIS PHARMACEUTICALS INC

New

Shares120.5K

Event2026-03-31

Filed2026-05-15

AIR LEASE CORP

-75.50%

Shares73.1K

Event2026-03-31

Filed2026-05-15

BENTLEY SYS INC

0.00%

Shares5.0M

Event2026-03-31

Filed2026-05-15

NUTANIX INC

42.86%

Shares5.0M

Event2026-03-31

Filed2026-05-15

REDFIN CORP

0.00%

Shares4.5M

Event2026-03-31

Filed2026-05-15

HALOZYME THERAPEUTICS INC

0.00%

Shares3.0M

Event2026-03-31

Filed2026-05-15

AES

AES CORP

New

Shares185.8K

Event2026-03-31

Filed2026-05-15

VARONIS SYS INC

0.00%

Shares3.0M

Event2026-03-31

Filed2026-05-15

CWAN

CLEARWATER ANALYTICS HLDGS I

-87.48%

Shares109.6K

Event2026-03-31

Filed2026-05-15

SEE

SEALED AIR CORP NEW

-89.97%

Shares56.1K

Event2026-03-31

Filed2026-05-15

AAUC

ALLIED GOLD CORP

New

Shares72.8K

Event2026-03-31

Filed2026-05-15

ONESTREAM INC

New

Shares91.1K

Event2026-03-31

Filed2026-05-15

BHF

BRIGHTHOUSE FINL INC

16.12%

Shares33.5K

Event2026-03-31

Filed2026-05-15

NATL

NCR ATLEOS CORPORATION

New

Shares38.9K

Event2026-03-31

Filed2026-05-15

SEM

SELECT MED HLDGS CORP

New

Shares103.5K

Event2026-03-31

Filed2026-05-15

THR

THERMON GROUP HLDGS INC

New

Shares33.0K

Event2026-03-31

Filed2026-05-15

SNCY

SUN CTRY AIRLS HLDGS INC

New

Shares98.9K

Event2026-03-31

Filed2026-05-15

CNTA

CENTESSA PHARMACEUTICALS PLC

New

Shares41.0K

Event2026-03-31

Filed2026-05-15

CSGS

CSG SYS INTL INC

-86.58%

Shares20.2K

Event2026-03-31

Filed2026-05-15

SEMR

SEMRUSH HLDGS INC

-78.70%

Shares133.9K

Event2026-03-31

Filed2026-05-15

FOLD

AMICUS THERAPEUTIC

-85.27%

Shares104.1K

Event2026-03-31

Filed2026-05-15

BOEING CO

New

Shares7.2K

Event2026-03-31

Filed2026-05-15

STKL

SUNOPTA INC

New

Shares196.5K

Event2026-03-31

Filed2026-05-15

PRA

PROASSURANCE CORP

8.75%

Shares51.1K

Event2026-03-31

Filed2026-05-15

CTLP

CANTALOUPE INC

-18.15%

Shares107.9K

Event2026-03-31

Filed2026-05-15

CCO

CLEAR CHANNEL OUTDOOR HLDGS

New

Shares478.5K

Event2026-03-31

Filed2026-05-15

IHS

IHS HOLDING LIMITED

New

Shares137.6K

Event2026-03-31

Filed2026-05-15

TALK

TALKSPACE INC

New

Shares216.2K

Event2026-03-31

Filed2026-05-15

MCW

MISTER CAR WASH INC

New

Shares156.5K

Event2026-03-31

Filed2026-05-15

DKS

DICKS SPORTING GOODS INC

386.18%

Shares5.3K

Event2026-03-31

Filed2026-05-15

GLADSTONE CAP CORP

-50.00%

Shares1.0M

Event2026-03-31

Filed2026-05-15

CTRA

COTERRA ENERGY INC

New

Shares27.3K

Event2026-03-31

Filed2026-05-15

SKYT

SKYWATER TECHNOLOGY INC

New

Shares34.5K

Event2026-03-31

Filed2026-05-15

NWE

NORTHWESTERN ENERGY GROUP IN

-3.28%

Shares13.8K

Event2026-03-31

Filed2026-05-15

AMRX

AMNEAL PHARMACEUTICALS INC

New

Shares68.4K

Event2026-03-31

Filed2026-05-15

CZR

CAESARS ENTERTAINMENT INC NE

New

Shares29.5K

Event2026-03-31

Filed2026-05-15

UDMY

UDEMY INC

2.51%

Shares139.3K

Event2026-03-31

Filed2026-05-15

LAUDER ESTEE COS INC

New

Shares7.5K

Event2026-03-31

Filed2026-05-15

PENN

PENN ENTERTAINMENT INC

New

Shares35.0K

Event2026-03-31

Filed2026-05-15

CVGW

CALAVO GROWERS INC

New

Shares20.3K

Event2026-03-31

Filed2026-05-15

IMXI

INTERNATIONAL MONEY EXPRESS

-62.56%

Shares33.1K

Event2026-03-31

Filed2026-05-15

NATH

NATHANS FAMOUS INC

New

Shares5.0K

Event2026-03-31

Filed2026-05-15

ONTF

ON24 INC

New

Shares60.4K

Event2026-03-31

Filed2026-05-15

HTBK

HERITAGE COMM CORP

11.99%

Shares38.0K

Event2026-03-31

Filed2026-05-15

BLFY

BLUE FOUNDRY BANCORP

New

Shares35.7K

Event2026-03-31

Filed2026-05-15

SATS

ECHOSTAR CORP

New

Shares4.0K

Event2026-03-31

Filed2026-05-15

FFIC

FLUSHING FINL CORP

New

Shares30.2K

Event2026-03-31

Filed2026-05-15

UAL

UNITED AIRLS HLDGS INC

New

Shares5.0K

Event2026-03-31

Filed2026-05-15

DHIL

DIAMOND HILL INVT GROUP INC

1.61%

Shares2.5K

Event2026-03-31

Filed2026-05-15

FFWM

FIRST FNDTN INC

2.51%

Shares67.6K

Event2026-03-31

Filed2026-05-15

ALK

ALASKA AIR GROUP INC

New

Shares10.3K

Event2026-03-31

Filed2026-05-15

PACB

PACIFIC BIOSCIENCES CALIF IN

New

Shares272.0K

Event2026-03-31

Filed2026-05-15

VCTR

VICTORY CAP HLDGS INC DEL

New

Shares5.1K

Event2026-03-31

Filed2026-05-15

VKTX

VIKING THERAPEUTICS INC

New

Shares10.3K

Event2026-03-31

Filed2026-05-15

UPS

UNITED PARCEL SVCS INC

New

Shares2.5K

Event2026-03-31

Filed2026-05-15

PYPL

PAYPAL HLDGS INC

New

Shares5.1K

Event2026-03-31

Filed2026-05-15

Call Option Holdings

BANCO SANTANDER SA Call CallBANCO SANTANDER SA681.7K sharesnew addition2026-03-312026-05-15

BANCO SANTANDER SA Call

BANCO SANTANDER SA

New

Shares681.7K

Event2026-03-31

Filed2026-05-15

Put Option Holdings

ELECTRONIC ARTS INC Put PutELECTRONIC ARTS INC149.8K sharesnew addition2026-03-312026-05-15

WARNER BROS DISCOVERY INC Put PutWARNER BROS DISCOVERY INC1.0M shares1005.90%2026-03-312026-05-15

DAY ONE BIOPHARMACEUTICALS I Put PutDAY ONE BIOPHARMACEUTICALS I839.7K sharesnew addition2026-03-312026-05-15

KENVUE INC Put PutKENVUE INC700.6K shares0.81%2026-03-312026-05-15

TERNS PHARMACEUTICALS INC Put PutTERNS PHARMACEUTICALS INC188.5K sharesnew addition2026-03-312026-05-15

SILICON LABORATORIES INC Put PutSILICON LABORATORIES INC47.6K sharesnew addition2026-03-312026-05-15

ZIM INTEGRATED SHIPPING SERV Put PutZIM INTEGRATED SHIPPING SERV331.8K sharesnew addition2026-03-312026-05-15

JANUS HENDERSON GROUP PLC Put PutJANUS HENDERSON GROUP PLC154.3K shares1185.83%2026-03-312026-05-15

AXALTA COATING SYS LTD Put PutAXALTA COATING SYS LTD195.0K shares190.61%2026-03-312026-05-15

APELLIS PHARMACEUTICALS INC Put PutAPELLIS PHARMACEUTICALS INC120.5K sharesnew addition2026-03-312026-05-15

CENTESSA PHARMACEUTICALS PLC Put PutCENTESSA PHARMACEUTICALS PLC41.0K sharesnew addition2026-03-312026-05-15

ELECTRONIC ARTS INC Put

ELECTRONIC ARTS INC

New

Shares149.8K

Event2026-03-31

Filed2026-05-15

WARNER BROS DISCOVERY INC Put

WARNER BROS DISCOVERY INC

1005.90%

Shares1.0M

Event2026-03-31

Filed2026-05-15

DAY ONE BIOPHARMACEUTICALS I Put

DAY ONE BIOPHARMACEUTICALS I

New

Shares839.7K

Event2026-03-31

Filed2026-05-15

KENVUE INC Put

KENVUE INC

0.81%

Shares700.6K

Event2026-03-31

Filed2026-05-15

TERNS PHARMACEUTICALS INC Put

TERNS PHARMACEUTICALS INC

New

Shares188.5K

Event2026-03-31

Filed2026-05-15

SILICON LABORATORIES INC Put

SILICON LABORATORIES INC

New

Shares47.6K

Event2026-03-31

Filed2026-05-15

ZIM INTEGRATED SHIPPING SERV Put

ZIM INTEGRATED SHIPPING SERV

New

Shares331.8K

Event2026-03-31

Filed2026-05-15

JANUS HENDERSON GROUP PLC Put

JANUS HENDERSON GROUP PLC

1185.83%

Shares154.3K

Event2026-03-31

Filed2026-05-15

AXALTA COATING SYS LTD Put

AXALTA COATING SYS LTD

190.61%

Shares195.0K

Event2026-03-31

Filed2026-05-15

APELLIS PHARMACEUTICALS INC Put

APELLIS PHARMACEUTICALS INC

New

Shares120.5K

Event2026-03-31

Filed2026-05-15

CENTESSA PHARMACEUTICALS PLC Put

CENTESSA PHARMACEUTICALS PLC

New

Shares41.0K

Event2026-03-31

Filed2026-05-15