Water Island Capital Llc

13F Filings History

Latest 13F report
Q2 2025 - Aug 14, 2025
Value $
$571M
Signature - Title
Philip E. Channen - Chief Compliance Officer
Location
New York, NY
Summary
This page shows a list of all the recent 13F filings made by Water Island Capital Llc. Form 13F is required to be filed within 45 days of the end of a calendar quarter. Water Island Capital Llc reported 58 stock holdings with total value $571M as of Q2 2025. Top holdings included AMED, ANSS, JNPR, HES, and SWTX.
Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Date Filed
Q2 2025 58 $571M +$284M -$298M -$13.7M AMED, ANSS, JNPR, HES, SWTX 13F-HR 8/14/2025, 03:31 PM
Q1 2025 64 $577M +$226M -$503M -$278M AMED, HES, HEES, K, EVRI 13F-HR 5/15/2025, 04:02 PM
Q4 2024 63 $832M +$254M -$387M -$133M AMED, HES, K, HCP, EDR 13F-HR 2/13/2025, 02:10 PM
Q3 2024 68 $968M +$337M -$317M +$19.6M AMED, HES, K, AXNX, SQSP 13F-HR 11/14/2024, 12:05 PM
Q2 2024 68 $947M +$425M -$335M +$90.3M AMED, HES, AXNX, HCP, ACI Restatement 11/14/2024, 04:28 PM
Q1 2024 50 $883M +$455M -$558M -$103M PXD, HES, AMED, EVBG, AXNX Restatement 11/14/2024, 04:27 PM
Q4 2023 46 $976M +$743M -$874M -$131M PXD, HES, SPLK, AMED, SOVO Restatement 11/14/2024, 04:23 PM
Q3 2023 72 $1.1B +$539M -$535M +$3.81M ATVI, VMW, HZNP, TXNM, DEN Restatement 11/14/2024, 04:21 PM
Q2 2023 65 $1.07B +$438M -$579M -$141M ATVI, VMW, HZNP, AJRD, TXNM Restatement 11/14/2024, 04:20 PM
Q1 2023 64 $1.23B +$680M -$615M +$65.4M ATVI, VMW, AJRD, HZNP, TXNM Restatement 11/14/2024, 04:18 PM
Q4 2022 74 $1.18B +$363M -$951M -$588M ATVI, TGNA, FHN, VMW, STOR Restatement 11/14/2024, 04:12 PM
Q3 2022 99 $1.77B +$863M -$62.5M +$801M CHNG, Y, ZEN, ATVI, TGNA 13F-HR 11/14/2022, 09:55 AM
Q2 2022 86 $1.6B +$548M -$312M +$237M Y, CHNG, MNDT, WBT, ATVI 13F-HR 8/15/2022, 10:25 AM
Q1 2022 84 $1.97B +$1.19B -$103M +$1.09B WBT, ROG, COHR, WWXXXX, CERN 13F-HR 5/13/2022, 03:19 PM
Q4 2021 96 $1.81B +$926M -$184M +$742M INFO, XLNX, WTW, NUAN, ROG 13F-HR 2/14/2022, 03:25 PM
Q3 2021 59 $1.74B +$938M -$1.08B -$138M WLFC, INFO, KSU, FIVN, NUAN 13F-HR 11/12/2021, 02:55 PM
Q2 2021 56 $1.89B +$1.09B -$913M +$182M INFO, ALXN, MXIM, WORK, WTW 13F-HR 8/12/2021, 11:21 AM
Q1 2021 83 $1.64B +$974M -$734M +$239M WTW, PS, INFO, RP, ALXN 13F-HR 5/12/2021, 05:40 PM
Q4 2020 103 $1.41B +$1.1B -$143M +$953M EV, WTW, NGHC, WORK, MXIM 13F-HR 2/10/2021, 03:10 PM
Q3 2020 90 $1.11B +$639M -$248M +$391M ETFC, AMTD, ACIA, NBL, NGHC 13F-HR 11/12/2020, 08:57 AM
Q2 2020 78 $1.09B +$525M -$60.6M +$464M LOGM, ETFC, TIF, AMTD, LM 13F-HR 8/12/2020, 02:15 PM
Q1 2020 57 $1.38B +$908M -$75.5M +$833M AGN, LOGM, TECD, TIF, AXE 13F-HR 5/12/2020, 01:16 PM
Q4 2019 65 $1.43B +$759M -$21.9M +$737M WCG, ZAYO, AGN, ADSW, MDCO 13F-HR 2/11/2020, 11:41 AM
Q3 2019 78 $1.61B +$934M -$23.6M +$911M CELG, WCG, STI, BPL, ZAYO 13F-HR 11/12/2019, 08:28 AM
Q2 2019 97 $2.15B LLL, RHT, APC, TRCO, FDC New Holdings 9/13/2019, 01:49 PM
Q2 2019 99 $2.17B +$1.33B -$120M +$1.21B LLL, RHT, APC, TRCO, FDC 13F-HR 8/12/2019, 05:06 PM
Q1 2019 142 $2B TRCO, RHT, LLL, FDC, NAVG New Holdings 5/6/2019, 06:19 PM
Q1 2019 143 $2B +$1.58B -$61.1M +$1.52B TRCO, RHT, LLL, FDC, NAVG 13F-HR 5/3/2019, 02:15 PM
Q4 2018 95 $1.34B +$876M -$73.3M +$802M FOXA, VVC, TRCO, DNB, IMPV 13F-HR 2/5/2019, 02:14 PM
Q3 2018 100 $1.8B +$1.07B -$151M +$915M FOXA, PF, FCEA, COL, KLXI 13F-HR 11/13/2018, 08:52 AM
Q2 2018 118 $1.83B +$1.06B -$240M +$825M NXPI, COL, VR, KS, XL 13F-HR 8/9/2018, 04:35 PM
Q1 2018 92 $2.49B +$1.81B -$177M +$1.63B NXPI, MON, CALD, CSRA, COL 13F-HR 5/14/2018, 05:14 PM
Q4 2017 90 $1.62B +$865M -$101M +$764M NXPI, TWX, CPN, COL, TRCO 13F-HR 2/13/2018, 01:44 PM
Q3 2017 109 $2.11B +$1.16B -$95.2M +$1.06B NXPI, BCR, TWX, PRXL, VWR 13F-HR 11/14/2017, 01:40 PM
Q2 2017 108 $2.13B +$1.51B -$40.2M +$1.47B AWHHF, PNRA, NXPI, MBBYF, TWX 13F-HR 8/14/2017, 12:41 PM
Q1 2017 88 $1.76B +$1.18B -$47.6M +$1.13B AWHHF, WWAV, VAL, PVTB, NXPI 13F-HR 5/15/2017, 03:49 PM
Q4 2016 110 $1.46B +$928M -$121M +$807M STJ, CST, HAR, WWAV, TMH 13F-HR 2/14/2017, 07:38 AM
Q3 2016 128 $1.56B +$927M -$35.5M +$891M ITC, LNKD, STJ, PNY, N 13F-HR 11/17/2016, 09:38 AM
Q2 2016 136 $2.02B +$1.63B -$44.3M +$1.59B HOT, GAS, ITC, FMER, QLIK 13F-HR 8/15/2016, 10:58 AM
Q1 2016 127 $1.51B +$1.03B -$78.6M +$948M CAM, HPY, TWC, YOKU, SNDK Restatement 5/16/2016, 04:45 PM
Q4 2015 108 $1.86B +$1.35B -$84.7M +$1.26B PCP, CB, HNT, BMR, HPY 13F-HR 2/16/2016, 08:18 AM
Q3 2015 98 $1.99B +$1.39B -$84M +$1.3B PRE, PCP, CBXXXX, SIAL, CYT Restatement 1/4/2016, 03:48 PM
Q2 2015 91 $2.48B +$1.57B -$69M +$1.5B A309PS, HSP, 4107PS, CTRX, WPZ 13F-HR 8/14/2015, 12:27 PM
Q1 2015 126 $2.68B +$2.02B -$119M +$1.9B TRW, SLXP, A309PS, FDO, HSP 13F-HR 5/13/2015, 10:39 AM
Q4 2014 102 $3B +$1.6B -$132M +$1.47B F113PS, TQNT, AGN, A309PS, PL Restatement 2/10/2015, 01:48 PM
Q3 2014 155 $2.94B +$1.53B -$358M +$1.17B FWLT, TWTC, HCT, SWY, PL Restatement 11/12/2014, 12:09 PM
Q2 2014 99 $2.94B +$2.03B -$131M +$1.9B FRX, UNS, SWY, FWLT, ESC 13F-HR 8/13/2014, 09:09 AM
Q1 2014 84 $2.82B +$2.3B -$41.7M +$2.26B BEAM, BRE, FRX, JOSB, LSI 13F-HR 5/14/2014, 01:23 PM
Q4 2013 64 $1.8B LIFE, PRGOXXXX, LPS, SNTS, HTSI 13F-HR 2/14/2014, 09:08 AM