WATER ISLAND CAPITAL LLC Hedge Fund

Location: NEW YORK, NY

CIK: 0001222765 · Show all filings

Period: Q1 2026 (← Previous)

Filing Date: May 15, 2026

Total Value: $896M (95.6% shares, 4.4% debt)

Holdings (98)

New Positions (59)

PEN PENUMBRA INC 4.4%
Value $39.44M Shares 120,095 Est. Cost $339.56 Unrealized 0.0%
MASI MASIMO CORP 3.9%
Value $34.54M Shares 194,197 Est. Cost $145.14 Unrealized 0.0%
ELECTRONIC ARTS INC 3.4%
Value $30.54M Shares 149,800 Est. Cost Unrealized
WBS WEBSTER FINL CORP 3.2%
Value $28.87M Shares 415,823 Est. Cost $68.20 Unrealized 0.0%
TPH TRI POINTE HOMES INC 2.8%
Value $25.06M Shares 536,367 Est. Cost $37.17 Unrealized 0.0%
NSA NATIONAL STORAGE AFFILIATES 2.4%
Value $21.75M Shares 576,224 Est. Cost $37.74 Unrealized
GLDD GREAT LAKES DREDGE & DOCK CO 2.4%
Value $21.48M Shares 1,263,580 Est. Cost $15.31 Unrealized 0.0%
ACLX ARCELLX INC 2.4%
Value $21.06M Shares 183,409 Est. Cost $71.30 Unrealized 0.0%
DAWN DAY ONE BIOPHARMACEUTICALS I 2.3%
Value $20.24M Shares 944,247 Est. Cost $11.02 Unrealized 0.0%
DAY ONE BIOPHARMACEUTICALS I 2.0%
Value $18M Shares 839,700 Est. Cost Unrealized
STEL STELLAR BANCORP INC 1.8%
Value $15.79M Shares 431,231 Est. Cost $35.57 Unrealized 0.0%
EHAB ENHABIT INC 1.5%
Value $13.87M Shares 984,611 Est. Cost $10.95 Unrealized 0.0%
SLAB SILICON LABORATORIES INC 1.4%
Value $12.16M Shares 58,417 Est. Cost $170.34 Unrealized 0.0%
VRE VERIS RESIDENTIAL INC 1.3%
Value $11.27M Shares 597,390 Est. Cost $18.87 Unrealized
PKST PEAKSTONE REALTY TRUST 1.2%
Value $10.52M Shares 503,583 Est. Cost $20.89 Unrealized
TERN TERNS PHARMACEUTICALS INC 1.1%
Value $9.938M Shares 188,500 Est. Cost $37.46 Unrealized 0.0%
TERNS PHARMACEUTICALS INC 1.1%
Value $9.938M Shares 188,500 Est. Cost Unrealized
SILICON LABORATORIES INC 1.1%
Value $9.908M Shares 47,600 Est. Cost Unrealized
KW KENNEDY-WILSON HOLDINGS INC 1.0%
Value $8.934M Shares 825,652 Est. Cost $10.06 Unrealized 0.0%
ZIM ZIM INTEGRATED SHIPPING SERV 1.0%
Value $8.743M Shares 331,800 Est. Cost $23.44 Unrealized 0.0%
ZIM INTEGRATED SHIPPING SERV 1.0%
Value $8.743M Shares 331,800 Est. Cost Unrealized
BANCO SANTANDER SA 0.9%
Value $7.69M Shares 681,700 Est. Cost Unrealized
UNF UNIFIRST CORP MASS 0.7%
Value $6.477M Shares 25,743 Est. Cost $214.29 Unrealized 0.0%
APELLIS PHARMACEUTICALS INC 0.5%
Value $4.848M Shares 120,500 Est. Cost Unrealized
APLS APELLIS PHARMACEUTICALS INC 0.5%
Value $4.848M Shares 120,500 Est. Cost $22.69 Unrealized 0.0%
AES AES CORP 0.3%
Value $2.618M Shares 185,833 Est. Cost $15.14 Unrealized 0.0%
AAUC ALLIED GOLD CORP 0.3%
Value $2.255M Shares 72,785 Est. Cost $29.54 Unrealized 0.0%
OS ONESTREAM INC 0.2%
Value $2.187M Shares 91,120 Est. Cost $23.28 Unrealized 0.0%
NATL NCR ATLEOS CORPORATION 0.2%
Value $1.697M Shares 38,939 Est. Cost $39.47 Unrealized 0.0%
SEM SELECT MED HLDGS CORP 0.2%
Value $1.685M Shares 103,467 Est. Cost $15.34 Unrealized 0.0%
THR THERMON GROUP HLDGS INC 0.2%
Value $1.663M Shares 32,987 Est. Cost $45.55 Unrealized 0.0%
SNCY SUN CTRY AIRLS HLDGS INC 0.2%
Value $1.633M Shares 98,859 Est. Cost $18.47 Unrealized 0.0%
CENTESSA PHARMACEUTICALS PLC 0.2%
Value $1.629M Shares 41,000 Est. Cost Unrealized
CNTA CENTESSA PHARMACEUTICALS PLC 0.2%
Value $1.629M Shares 41,000 Est. Cost $39.72 Unrealized
BA BOEING CO 0.2%
Value $1.44M Shares 7,234 Est. Cost $238.54 Unrealized 0.0%
STKL SUNOPTA INC 0.1%
Value $1.273M Shares 196,514 Est. Cost $5.16 Unrealized 0.0%
CCO CLEAR CHANNEL OUTDOOR HLDGS 0.1%
Value $1.134M Shares 478,517 Est. Cost $2.20 Unrealized 0.0%
IHS IHS HOLDING LIMITED 0.1%
Value $1.133M Shares 137,615 Est. Cost $7.93 Unrealized 0.0%
TALK TALKSPACE INC 0.1%
Value $1.119M Shares 216,158 Est. Cost $4.03 Unrealized 0.0%
MCW MISTER CAR WASH INC 0.1%
Value $1.091M Shares 156,502 Est. Cost $6.07 Unrealized 0.0%
CTRA COTERRA ENERGY INC 0.1%
Value $959K Shares 27,292 Est. Cost $28.33 Unrealized 0.0%
SKYT SKYWATER TECHNOLOGY INC 0.1%
Value $947K Shares 34,536 Est. Cost $30.04 Unrealized 0.0%
AMRX AMNEAL PHARMACEUTICALS INC 0.1%
Value $850K Shares 68,400 Est. Cost $13.92 Unrealized 0.0%
CZR CAESARS ENTERTAINMENT INC NE 0.1%
Value $780K Shares 29,500 Est. Cost $22.01 Unrealized 0.0%
EL LAUDER ESTEE COS INC 0.1%
Value $538K Shares 7,500 Est. Cost $111.88 Unrealized 0.0%
PENN PENN ENTERTAINMENT INC 0.1%
Value $526K Shares 35,000 Est. Cost $13.52 Unrealized 0.0%
CVGW CALAVO GROWERS INC 0.1%
Value $524K Shares 20,321 Est. Cost $24.78 Unrealized 0.0%
NATH NATHANS FAMOUS INC 0.1%
Value $503K Shares 4,994 Est. Cost $98.16 Unrealized 0.0%
ONTF ON24 INC 0.1%
Value $489K Shares 60,364 Est. Cost $7.96 Unrealized 0.0%
BLFY BLUE FOUNDRY BANCORP 0.1%
Value $472K Shares 35,658 Est. Cost $13.40 Unrealized 0.0%
SATS ECHOSTAR CORP 0.1%
Value $468K Shares 4,000 Est. Cost $116.36 Unrealized 0.0%
FFIC FLUSHING FINL CORP 0.1%
Value $463K Shares 30,161 Est. Cost $15.88 Unrealized 0.0%
UAL UNITED AIRLS HLDGS INC 0.1%
Value $460K Shares 5,000 Est. Cost $111.68 Unrealized 0.0%
ALK ALASKA AIR GROUP INC 0.0%
Value $378K Shares 10,265 Est. Cost $52.50 Unrealized 0.0%
PACB PACIFIC BIOSCIENCES CALIF IN 0.0%
Value $359K Shares 272,040 Est. Cost $2.02 Unrealized 0.0%
VCTR VICTORY CAP HLDGS INC DEL 0.0%
Value $335K Shares 5,120 Est. Cost $70.79 Unrealized 0.0%
VKTX VIKING THERAPEUTICS INC 0.0%
Value $335K Shares 10,280 Est. Cost $31.35 Unrealized 0.0%
UPS UNITED PARCEL SVCS INC 0.0%
Value $248K Shares 2,520 Est. Cost $109.86 Unrealized 0.0%
PYPL PAYPAL HLDGS INC 0.0%
Value $232K Shares 5,124 Est. Cost $50.08 Unrealized 0.0%

Increased Positions (20)

WARNER BROS DISCOVERY INC 3.2%
Value $28.82M (+953.7%) Shares 1,049,500 (+1005.9%) Est. Cost Unrealized
JHG JANUS HENDERSON GROUP PLC 5.3%
Value $47.38M (+53.8%) Shares 922,277 (+42.4%) Est. Cost $45.50 Unrealized +6.6%
EA ELECTRONIC ARTS INC 5.7%
Value $50.94M (+37.9%) Shares 249,888 (+38.2%) Est. Cost $189.01 Unrealized +7.2%
WBD WARNER BROS DISCOVERY INC 5.0%
Value $44.4M (+35.2%) Shares 1,617,020 (+41.9%) Est. Cost $24.81 Unrealized +13.8%
HOLX HOLOGIC INC 4.7%
Value $42.33M (+21.5%) Shares 560,045 (+19.7%) Est. Cost $73.39 Unrealized +2.2%
JANUS HENDERSON GROUP PLC 0.9%
Value $7.926M (+1288.5%) Shares 154,300 (+1185.8%) Est. Cost Unrealized
DBRG DIGITALBRIDGE GROUP INC 2.2%
Value $20.03M (+40.6%) Shares 1,299,051 (+39.8%) Est. Cost $12.97 Unrealized +18.6%
TXNM TXNM ENERGY INC 4.4%
Value $39.45M (+16.2%) Shares 674,867 (+17.1%) Est. Cost $56.38 Unrealized +4.9%
TXNM ENERGY INC 0.9%
Value $8.099M (+100.5%) Shares 6,000,000 (+100.0%) Est. Cost $1.33 Unrealized
AXALTA COATING SYS LTD 0.6%
Value $5.402M (+149.1%) Shares 195,000 (+190.6%) Est. Cost Unrealized
NSC NORFOLK SOUTHN CORP 4.3%
Value $38.47M (+3.3%) Shares 134,051 (+3.9%) Est. Cost $277.17 Unrealized +7.6%
NUTANIX INC 0.5%
Value $4.515M (+33.7%) Shares 5,000,000 (+42.9%) Est. Cost $0.95 Unrealized
DKS DICKS SPORTING GOODS INC 0.1%
Value $1.06M (+387.0%) Shares 5,348 (+386.2%) Est. Cost $209.80 Unrealized -0.9%
KVUE KENVUE INC 1.3%
Value $12.08M (+1.4%) Shares 700,600 (+1.5%) Est. Cost $16.28 Unrealized +8.5%
UDMY UDEMY INC 0.1%
Value $644K (-19.0%) Shares 139,335 (+2.5%) Est. Cost $5.81 Unrealized -13.3%
BHF BRIGHTHOUSE FINL INC 0.2%
Value $2.005M (+7.3%) Shares 33,490 (+16.1%) Est. Cost $59.47 Unrealized +7.4%
PRA PROASSURANCE CORP 0.1%
Value $1.263M (+11.3%) Shares 51,103 (+8.7%) Est. Cost $18.06 Unrealized +34.4%
HTBK HERITAGE COMM CORP 0.1%
Value $474K (+16.4%) Shares 37,992 (+12.0%) Est. Cost $11.08 Unrealized +16.8%
DHIL DIAMOND HILL INVT GROUP INC 0.0%
Value $434K (+3.2%) Shares 2,522 (+1.6%) Est. Cost $135.63 Unrealized +25.9%
FFWM FIRST FNDTN INC 0.0%
Value $399K (-1.8%) Shares 67,573 (+2.5%) Est. Cost $5.61 Unrealized +11.0%

Exited Positions (52)

CyberArk Software Ltd 4.3%
Value $38.65M Shares 86,648 Est. Cost $483.15 Unrealized
EXAS Exact Sciences Corp 4.0%
Value $35.55M Shares 350,009 Est. Cost $80.31 Unrealized +27.8%
CMA Comerica Inc 3.9%
Value $34.6M Shares 398,037 Est. Cost $79.98 Unrealized +15.4%
Cidara Therapeutics Inc 3.7%
Value $33.29M Shares 150,708 Est. Cost $220.89 Unrealized
Avadel Pharmaceuticals PLC 2.6%
Value $23.43M Shares 1,087,117 Est. Cost $21.55 Unrealized
TGNA TEGNA Inc 2.6%
Value $22.9M Shares 1,179,885 Est. Cost $19.06 Unrealized +3.0%
Aspen Insurance Holdings Ltd 2.4%
Value $21.25M Shares 572,685 Est. Cost $32.87 Unrealized +13.5%
Synovus Financial Corp 2.3%
Value $20.2M Shares 403,650 Est. Cost $49.08 Unrealized
CFLT Confluent Inc 2.2%
Value $19.36M Shares 640,113 Est. Cost $24.55 Unrealized +24.2%
State Street SPDR S&P 500 ETF 1.9%
Value $17.05M Shares 25,000 Est. Cost Unrealized
Cidara Therapeutics Inc 1.9%
Value $16.99M Shares 76,900 Est. Cost Unrealized
Teck Resources Ltd 1.6%
Value $13.99M Shares 292,100 Est. Cost Unrealized
Jamf Holding Corp 1.4%
Value $12.82M Shares 985,069 Est. Cost $13.01 Unrealized
CADE Cadence Bank 1.4%
Value $12.75M Shares 297,603 Est. Cost $39.41 Unrealized +11.5%
Hillenbrand Inc 1.4%
Value $12.66M Shares 399,006 Est. Cost $31.72 Unrealized
PLYM Plymouth Industrial REIT Inc 1.4%
Value $12.24M Shares 559,215 Est. Cost $21.88 Unrealized
Avidity Biosciences Inc 1.4%
Value $12.17M Shares 168,700 Est. Cost Unrealized
RNAM Avidity Biosciences Inc 1.4%
Value $12.15M Shares 168,385 Est. Cost $64.59 Unrealized +12.5%
Hillenbrand Inc 1.1%
Value $9.992M Shares 315,000 Est. Cost Unrealized
Dynavax Technologies Corp 1.0%
Value $9.386M Shares 610,261 Est. Cost $15.38 Unrealized
QRVO Qorvo Inc 1.0%
Value $9.256M Shares 109,521 Est. Cost $88.25 Unrealized -6.9%
FRGE Forge Global Holdings Inc 1.0%
Value $8.782M Shares 197,075 Est. Cost $33.80 Unrealized +32.1%
Astria Therapeutics Inc 0.9%
Value $8.061M Shares 615,790 Est. Cost $13.09 Unrealized
Amicus Therapeutics Inc 0.7%
Value $6.422M Shares 451,000 Est. Cost Unrealized
Anywhere Real Estate Inc 0.7%
Value $6.299M Shares 444,821 Est. Cost $10.59 Unrealized
SPOTIFY USA INC 0.6%
Value $5.675M Shares 5,000,000 Est. Cost $1.05 Unrealized
BOEING CO/THE 0.6%
Value $5.525M Shares 80,000 Est. Cost $60.89 Unrealized
ALEX Alexander & Baldwin Inc 0.6%
Value $5.429M Shares 263,012 Est. Cost $20.64 Unrealized
CONFLUENT INC 0.5%
Value $4.855M Shares 5,000,000 Est. Cost $0.97 Unrealized
Hologic Inc 0.5%
Value $4.514M Shares 60,600 Est. Cost Unrealized
EB Eventbrite Inc 0.5%
Value $4.395M Shares 987,653 Est. Cost $3.10 Unrealized +43.2%
Kimberly-Clark Corp 0.5%
Value $4.258M Shares 42,200 Est. Cost Unrealized
Dayforce Inc 0.4%
Value $3.282M Shares 47,453 Est. Cost $62.23 Unrealized +11.3%
BLACKLINE INC 0.3%
Value $3.034M Shares 3,071,000 Est. Cost $0.94 Unrealized
ITRON INC 0.3%
Value $2.473M Shares 2,500,000 Est. Cost $0.99 Unrealized
TreeHouse Foods Inc 0.3%
Value $2.345M Shares 99,421 Est. Cost $23.59 Unrealized
Core Scientific Inc 0.2%
Value $2.094M Shares 143,800 Est. Cost Unrealized
Kenvue Inc 0.2%
Value $2.042M Shares 118,400 Est. Cost Unrealized
NGD New Gold Inc 0.2%
Value $1.976M Shares 226,878 Est. Cost $7.53 Unrealized +45.8%
REV Group Inc 0.2%
Value $1.901M Shares 31,261 Est. Cost $60.81 Unrealized
STAA STAAR Surgical Co 0.2%
Value $1.567M Shares 67,862 Est. Cost $23.84 Unrealized -18.4%
WTRG Essential Utilities Inc 0.2%
Value $1.406M Shares 36,646 Est. Cost $39.35 Unrealized -1.5%
EVOLENT HEALTH INC 0.2%
Value $1.346M Shares 2,000,000 Est. Cost $0.81 Unrealized
Denny's Corp 0.1%
Value $1.328M Shares 213,445 Est. Cost $6.22 Unrealized
Anywhere Real Estate Inc 0.1%
Value $1.007M Shares 71,100 Est. Cost Unrealized
Anywhere Real Estate Inc 0.1%
Value $1.007M Shares 71,100 Est. Cost Unrealized
MOFG MidWestOne Financial Group Inc 0.1%
Value $846K Shares 21,980 Est. Cost $36.46 Unrealized +24.0%
ZEUS Olympic Steel Inc 0.1%
Value $697K Shares 16,293 Est. Cost $35.69 Unrealized +36.0%
Soho House & Co Inc 0.1%
Value $634K Shares 70,756 Est. Cost $8.86 Unrealized
City Office REIT Inc 0.0%
Value $430K Shares 61,498 Est. Cost $6.96 Unrealized
TrueCar Inc 0.0%
Value $392K Shares 173,620 Est. Cost $2.26 Unrealized
FSFG First Savings Financial Group 0.0%
Value $280K Shares 8,788 Est. Cost $30.96 Unrealized +5.5%

Decreased Positions (10)