WATER ISLAND CAPITAL LLC Hedge Fund

Location: New York, NY

CIK: 0001222765 · Show all filings

Period: Q1 2026 (← Previous) (Next →)

Filing Date: May 15, 2026

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

Holdings (98)

EA ELECTRONIC ARTS INC 5.7%
Value $50.94M Shares 249,888 Share Price $203.87 Est. Cost/Share $189.01 Unrealized @ Report Date +7.2%
JHG JANUS HENDERSON GROUP PLC 5.3%
Value $47.38M Shares 922,277 Share Price $51.37 * Est. Cost/Share $45.50 Unrealized @ Report Date +6.6%
WBD WARNER BROS DISCOVERY INC 5.0%
Value $44.4M Shares 1,617,020 Share Price $27.46 * Est. Cost/Share $24.81 Unrealized @ Report Date +13.8%
HOLX HOLOGIC INC 4.7%
Value $42.33M Shares 560,045 Share Price $75.59 Est. Cost/Share $73.39 Unrealized @ Report Date +2.2%
TXNM TXNM ENERGY INC 4.4%
Value $39.45M Shares 674,867 Share Price $58.46 Est. Cost/Share $56.38 Unrealized @ Report Date +4.9%
PEN PENUMBRA INC 4.4%
Value $39.44M Shares 120,095 Share Price $328.37 * Est. Cost/Share $339.56 Unrealized @ Report Date 0.0%
GTLS CHART INDS INC 4.4%
Value $39.27M Shares 189,939 Share Price $206.75 Est. Cost/Share $194.13 Unrealized @ Report Date +6.7%
NSC NORFOLK SOUTHN CORP 4.3%
Value $38.47M Shares 134,051 Share Price $287.00 * Est. Cost/Share $277.17 Unrealized @ Report Date +7.6%
MASI MASIMO CORP 3.9%
Value $34.54M Shares 194,197 Share Price $177.87 * Est. Cost/Share $145.14 Unrealized @ Report Date 0.0%
— ELECTRONIC ARTS INC 3.4%
Value $30.54M Shares 149,800 Share Price $203.87 Est. Cost/Share — Unrealized @ Report Date —
WBS WEBSTER FINL CORP 3.2%
Value $28.87M Shares 415,823 Share Price $69.42 Est. Cost/Share $68.20 Unrealized @ Report Date 0.0%
— WARNER BROS DISCOVERY INC 3.2%
Value $28.82M Shares 1,049,500 Share Price $27.46 Est. Cost/Share — Unrealized @ Report Date —
TPH TRI POINTE HOMES INC 2.8%
Value $25.06M Shares 536,367 Share Price $46.73 * Est. Cost/Share $37.17 Unrealized @ Report Date 0.0%
NSA NATIONAL STORAGE AFFILIATES 2.4%
Value $21.75M Shares 576,224 Share Price $37.74 Est. Cost/Share $37.74 Unrealized @ Report Date —
GLDD GREAT LAKES DREDGE & DOCK CO 2.4%
Value $21.48M Shares 1,263,580 Share Price $17.00 * Est. Cost/Share $15.31 Unrealized @ Report Date 0.0%
ACLX ARCELLX INC 2.4%
Value $21.06M Shares 183,409 Share Price $114.82 * Est. Cost/Share $71.30 Unrealized @ Report Date 0.0%
DAWN DAY ONE BIOPHARMACEUTICALS I 2.3%
Value $20.24M Shares 944,247 Share Price $21.44 * Est. Cost/Share $11.02 Unrealized @ Report Date 0.0%
DBRG DIGITALBRIDGE GROUP INC 2.2%
Value $20.03M Shares 1,299,051 Share Price $15.42 Est. Cost/Share $12.97 Unrealized @ Report Date +18.6%
— DAY ONE BIOPHARMACEUTICALS I 2.0%
Value $18M Shares 839,700 Share Price $21.44 Est. Cost/Share — Unrealized @ Report Date —
STEL STELLAR BANCORP INC 1.8%
Value $15.79M Shares 431,231 Share Price $36.61 * Est. Cost/Share $35.57 Unrealized @ Report Date 0.0%
EHAB ENHABIT INC 1.5%
Value $13.87M Shares 984,611 Share Price $14.09 * Est. Cost/Share $10.95 Unrealized @ Report Date 0.0%
SLAB SILICON LABORATORIES INC 1.4%
Value $12.16M Shares 58,417 Share Price $208.15 * Est. Cost/Share $170.34 Unrealized @ Report Date 0.0%
KVUE KENVUE INC 1.3%
Value $12.08M Shares 700,600 Share Price $17.24 * Est. Cost/Share $16.28 Unrealized @ Report Date +8.5%
— KENVUE INC 1.3%
Value $12.08M Shares 700,600 Share Price $17.24 Est. Cost/Share — Unrealized @ Report Date —
VRE VERIS RESIDENTIAL INC 1.3%
Value $11.27M Shares 597,390 Share Price $18.87 Est. Cost/Share $18.87 Unrealized @ Report Date —
PKST PEAKSTONE REALTY TRUST 1.2%
Value $10.52M Shares 503,583 Share Price $20.89 Est. Cost/Share $20.89 Unrealized @ Report Date —
TERN TERNS PHARMACEUTICALS INC 1.1%
Value $9.938M Shares 188,500 Share Price $52.72 * Est. Cost/Share $37.46 Unrealized @ Report Date 0.0%
— TERNS PHARMACEUTICALS INC 1.1%
Value $9.938M Shares 188,500 Share Price $52.72 Est. Cost/Share — Unrealized @ Report Date —
— SILICON LABORATORIES INC 1.1%
Value $9.908M Shares 47,600 Share Price $208.15 Est. Cost/Share — Unrealized @ Report Date —
KW KENNEDY-WILSON HOLDINGS INC 1.0%
Value $8.934M Shares 825,652 Share Price $10.82 * Est. Cost/Share $10.06 Unrealized @ Report Date 0.0%
— ZIM INTEGRATED SHIPPING SERV 1.0%
Value $8.743M Shares 331,800 Share Price $26.35 Est. Cost/Share — Unrealized @ Report Date —
ZIM ZIM INTEGRATED SHIPPING SERV 1.0%
Value $8.743M Shares 331,800 Share Price $26.35 * Est. Cost/Share $23.44 Unrealized @ Report Date 0.0%
— TXNM ENERGY INC 0.9%
Value $8.099M Shares 6,000,000 Share Price $1.35 Est. Cost/Share $1.33 Unrealized @ Report Date —
— JANUS HENDERSON GROUP PLC 0.9%
Value $7.926M Shares 154,300 Share Price $51.37 Est. Cost/Share — Unrealized @ Report Date —
— BANCO SANTANDER SA 0.9%
Value $7.69M Shares 681,700 Share Price $11.28 Est. Cost/Share — Unrealized @ Report Date —
UNF UNIFIRST CORP MASS 0.7%
Value $6.477M Shares 25,743 Share Price $251.59 * Est. Cost/Share $214.29 Unrealized @ Report Date 0.0%
— CSG SYS INTL INC 0.7%
Value $6.091M Shares 5,000,000 Share Price $1.22 Est. Cost/Share $1.19 Unrealized @ Report Date —
AXTA AXALTA COATING SYS LTD 0.6%
Value $5.731M Shares 206,902 Share Price $27.70 * Est. Cost/Share $29.34 Unrealized @ Report Date +14.8%
— AXALTA COATING SYS LTD 0.6%
Value $5.402M Shares 195,000 Share Price $27.70 Est. Cost/Share — Unrealized @ Report Date —
— RAPID7 INC 0.5%
Value $4.863M Shares 5,501,530 Share Price $0.88 Est. Cost/Share $0.92 Unrealized @ Report Date —
— APELLIS PHARMACEUTICALS INC 0.5%
Value $4.848M Shares 120,500 Share Price $40.23 Est. Cost/Share — Unrealized @ Report Date —
APLS APELLIS PHARMACEUTICALS INC 0.5%
Value $4.848M Shares 120,500 Share Price $40.23 * Est. Cost/Share $22.69 Unrealized @ Report Date 0.0%
AL AIR LEASE CORP 0.5%
Value $4.749M Shares 73,131 Share Price $64.94 Est. Cost/Share $59.40 Unrealized @ Report Date +8.6%
— BENTLEY SYS INC 0.5%
Value $4.747M Shares 5,000,000 Share Price $0.95 Est. Cost/Share $0.91 Unrealized @ Report Date —
— NUTANIX INC 0.5%
Value $4.515M Shares 5,000,000 Share Price $0.90 Est. Cost/Share $0.95 Unrealized @ Report Date —
— REDFIN CORP 0.5%
Value $4.304M Shares 4,500,000 Share Price $0.96 Est. Cost/Share $0.88 Unrealized @ Report Date —
— HALOZYME THERAPEUTICS INC 0.3%
Value $3.111M Shares 3,000,000 Share Price $1.04 Est. Cost/Share $0.95 Unrealized @ Report Date —
AES AES CORP 0.3%
Value $2.618M Shares 185,833 Share Price $14.09 * Est. Cost/Share $15.14 Unrealized @ Report Date 0.0%
— VARONIS SYS INC 0.3%
Value $2.615M Shares 3,000,000 Share Price $0.87 Est. Cost/Share $0.93 Unrealized @ Report Date —
CWAN CLEARWATER ANALYTICS HLDGS I 0.3%
Value $2.592M Shares 109,589 Share Price $23.65 Est. Cost/Share $20.03 Unrealized @ Report Date +19.0%
SEE SEALED AIR CORP NEW 0.3%
Value $2.358M Shares 56,071 Share Price $42.05 Est. Cost/Share $38.57 Unrealized @ Report Date +8.4%
AAUC ALLIED GOLD CORP 0.3%
Value $2.255M Shares 72,785 Share Price $30.99 * Est. Cost/Share $29.54 Unrealized @ Report Date 0.0%
OS ONESTREAM INC 0.2%
Value $2.187M Shares 91,120 Share Price $24.00 * Est. Cost/Share $23.28 Unrealized @ Report Date 0.0%
BHF BRIGHTHOUSE FINL INC 0.2%
Value $2.005M Shares 33,490 Share Price $59.88 * Est. Cost/Share $59.47 Unrealized @ Report Date +7.4%
NATL NCR ATLEOS CORPORATION 0.2%
Value $1.697M Shares 38,939 Share Price $43.58 * Est. Cost/Share $39.47 Unrealized @ Report Date 0.0%
SEM SELECT MED HLDGS CORP 0.2%
Value $1.685M Shares 103,467 Share Price $16.29 * Est. Cost/Share $15.34 Unrealized @ Report Date 0.0%
THR THERMON GROUP HLDGS INC 0.2%
Value $1.663M Shares 32,987 Share Price $50.40 * Est. Cost/Share $45.55 Unrealized @ Report Date 0.0%
SNCY SUN CTRY AIRLS HLDGS INC 0.2%
Value $1.633M Shares 98,859 Share Price $16.52 * Est. Cost/Share $18.47 Unrealized @ Report Date 0.0%
— CENTESSA PHARMACEUTICALS PLC 0.2%
Value $1.629M Shares 41,000 Share Price $39.72 Est. Cost/Share — Unrealized @ Report Date —
CNTA CENTESSA PHARMACEUTICALS PLC 0.2%
Value $1.629M Shares 41,000 Share Price $39.72 Est. Cost/Share $39.72 Unrealized @ Report Date —
CSGS CSG SYS INTL INC 0.2%
Value $1.617M Shares 20,223 Share Price $79.94 Est. Cost/Share $73.52 Unrealized @ Report Date +8.1%
SEMR SEMRUSH HLDGS INC 0.2%
Value $1.598M Shares 133,872 Share Price $11.94 Est. Cost/Share $9.37 Unrealized @ Report Date +26.7%
FOLD AMICUS THERAPEUTIC 0.2%
Value $1.505M Shares 104,066 Share Price $14.46 Est. Cost/Share $9.82 Unrealized @ Report Date +45.6%
BA BOEING CO 0.2%
Value $1.44M Shares 7,234 Share Price $199.03 * Est. Cost/Share $238.54 Unrealized @ Report Date 0.0%
STKL SUNOPTA INC 0.1%
Value $1.273M Shares 196,514 Share Price $6.48 * Est. Cost/Share $5.16 Unrealized @ Report Date 0.0%
PRA PROASSURANCE CORP 0.1%
Value $1.263M Shares 51,103 Share Price $24.72 Est. Cost/Share $18.06 Unrealized @ Report Date +34.4%
CTLP CANTALOUPE INC 0.1%
Value $1.166M Shares 107,867 Share Price $10.81 Est. Cost/Share $8.65 Unrealized @ Report Date +22.5%
CCO CLEAR CHANNEL OUTDOOR HLDGS 0.1%
Value $1.134M Shares 478,517 Share Price $2.37 * Est. Cost/Share $2.20 Unrealized @ Report Date 0.0%
IHS IHS HOLDING LIMITED 0.1%
Value $1.133M Shares 137,615 Share Price $8.23 * Est. Cost/Share $7.93 Unrealized @ Report Date 0.0%
TALK TALKSPACE INC 0.1%
Value $1.119M Shares 216,158 Share Price $5.18 * Est. Cost/Share $4.03 Unrealized @ Report Date 0.0%
MCW MISTER CAR WASH INC 0.1%
Value $1.091M Shares 156,502 Share Price $6.97 * Est. Cost/Share $6.07 Unrealized @ Report Date 0.0%
DKS DICKS SPORTING GOODS INC 0.1%
Value $1.06M Shares 5,348 Share Price $198.29 * Est. Cost/Share $209.80 Unrealized @ Report Date -0.9%
— GLADSTONE CAP CORP 0.1%
Value $968K Shares 1,000,000 Share Price $0.97 Est. Cost/Share $0.99 Unrealized @ Report Date —
CTRA COTERRA ENERGY INC 0.1%
Value $959K Shares 27,292 Share Price $35.14 * Est. Cost/Share $28.33 Unrealized @ Report Date 0.0%
SKYT SKYWATER TECHNOLOGY INC 0.1%
Value $947K Shares 34,536 Share Price $27.41 * Est. Cost/Share $30.04 Unrealized @ Report Date 0.0%
NWE NORTHWESTERN ENERGY GROUP IN 0.1%
Value $912K Shares 13,838 Share Price $65.94 * Est. Cost/Share $54.14 Unrealized @ Report Date +25.3%
AMRX AMNEAL PHARMACEUTICALS INC 0.1%
Value $850K Shares 68,400 Share Price $12.43 * Est. Cost/Share $13.92 Unrealized @ Report Date 0.0%
CZR CAESARS ENTERTAINMENT INC NE 0.1%
Value $780K Shares 29,500 Share Price $26.43 * Est. Cost/Share $22.01 Unrealized @ Report Date 0.0%
UDMY UDEMY INC 0.1%
Value $644K Shares 139,335 Share Price $4.62 * Est. Cost/Share $5.81 Unrealized @ Report Date -13.3%
EL LAUDER ESTEE COS INC 0.1%
Value $538K Shares 7,500 Share Price $71.77 * Est. Cost/Share $111.88 Unrealized @ Report Date 0.0%
PENN PENN ENTERTAINMENT INC 0.1%
Value $526K Shares 35,000 Share Price $15.03 * Est. Cost/Share $13.52 Unrealized @ Report Date 0.0%
CVGW CALAVO GROWERS INC 0.1%
Value $524K Shares 20,321 Share Price $25.79 * Est. Cost/Share $24.78 Unrealized @ Report Date 0.0%
IMXI INTERNATIONAL MONEY EXPRESS 0.1%
Value $523K Shares 33,122 Share Price $15.80 Est. Cost/Share $12.46 Unrealized @ Report Date +24.6%
NATH NATHANS FAMOUS INC 0.1%
Value $503K Shares 4,994 Share Price $100.73 * Est. Cost/Share $98.16 Unrealized @ Report Date 0.0%
ONTF ON24 INC 0.1%
Value $489K Shares 60,364 Share Price $8.10 Est. Cost/Share $7.96 Unrealized @ Report Date 0.0%
HTBK HERITAGE COMM CORP 0.1%
Value $474K Shares 37,992 Share Price $12.48 * Est. Cost/Share $11.08 Unrealized @ Report Date +16.8%
BLFY BLUE FOUNDRY BANCORP 0.1%
Value $472K Shares 35,658 Share Price $13.24 Est. Cost/Share $13.40 Unrealized @ Report Date 0.0%
SATS ECHOSTAR CORP 0.1%
Value $468K Shares 4,000 Share Price $117.07 Est. Cost/Share $116.36 Unrealized @ Report Date 0.0%
FFIC FLUSHING FINL CORP 0.1%
Value $463K Shares 30,161 Share Price $15.36 * Est. Cost/Share $15.88 Unrealized @ Report Date 0.0%
UAL UNITED AIRLS HLDGS INC 0.1%
Value $460K Shares 5,000 Share Price $92.07 * Est. Cost/Share $111.68 Unrealized @ Report Date 0.0%
DHIL DIAMOND HILL INVT GROUP INC 0.0%
Value $434K Shares 2,522 Share Price $172.10 Est. Cost/Share $135.63 Unrealized @ Report Date +25.9%
FFWM FIRST FNDTN INC 0.0%
Value $399K Shares 67,573 Share Price $5.90 * Est. Cost/Share $5.61 Unrealized @ Report Date +11.0%
ALK ALASKA AIR GROUP INC 0.0%
Value $378K Shares 10,265 Share Price $36.78 * Est. Cost/Share $52.50 Unrealized @ Report Date 0.0%
PACB PACIFIC BIOSCIENCES CALIF IN 0.0%
Value $359K Shares 272,040 Share Price $1.32 * Est. Cost/Share $2.02 Unrealized @ Report Date 0.0%
VCTR VICTORY CAP HLDGS INC DEL 0.0%
Value $335K Shares 5,120 Share Price $65.48 * Est. Cost/Share $70.79 Unrealized @ Report Date 0.0%
VKTX VIKING THERAPEUTICS INC 0.0%
Value $335K Shares 10,280 Share Price $32.54 * Est. Cost/Share $31.35 Unrealized @ Report Date 0.0%
UPS UNITED PARCEL SVCS INC 0.0%
Value $248K Shares 2,520 Share Price $98.38 * Est. Cost/Share $109.86 Unrealized @ Report Date 0.0%
PYPL PAYPAL HLDGS INC 0.0%
Value $232K Shares 5,124 Share Price $45.23 * Est. Cost/Share $50.08 Unrealized @ Report Date 0.0%