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IRIDIAN ASSET MANAGEMENT LLC/CT

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13F filer, CIK 1033427, WESTPORT, CT

IRIDIAN ASSET MANAGEMENT LLC/CT reported $271,616,229 across 43 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-01-23. Its ten largest share positions make up 60.18% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001033427-26-000003

Period
2025-12-31
Reported value
$272M
Holdings
43
Top 10 weight
60.18%
New
5
Sold out
5

Stakes and trades reported after 2025-12-31

13D, 13G and Form 4 filings by this filer's group, dated after the 13F period, on securities the quarter does not hold as shares.

  • KATAPULT HOLDINGS INC: 13G/A 919,498 shares, 1.1% of the class, 13G/A filed 2026-10-01, 0001033427-26-000012
    Accepted , ingested

Largest buys vs the previous quarter

SecurityShares changeApprox. value
ACVAadded+1,108,301$8.89M
HGVadded+190,909$8.54M
POSTadded+50,044$4.96M
BALLadded+76,211$4.04M
KPLTadded+611,384$3.95M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
ELVreduced-27,029-$9.48M
RTOreduced-308,212-$9.08M
HLFreduced-612,774-$7.9M
LNWOexited-81,186-$6.81M
TNLreduced-95,571-$6.74M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2025

Share positions as resolved from 13F-HR 0001033427-26-000003, largest first. % of portfolio is the value over $271,616,229, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
ACVAACV AUCTIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,062,081 shares; 2024Q4: 1,106,154 shares; 2025Q1: 1,967,332 shares; 2025Q2: 1,231,493 shares; 2025Q3: 1,880,851 shares; 2025Q4: 2,989,152 shares 2,989,152$24M8.83%+1,108,301Timeline
HLFHERBALIFE LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,228,193 shares; 2024Q4: 2,507,740 shares; 2025Q1: 2,775,430 shares; 2025Q2: 2,228,259 shares; 2025Q3: 2,449,155 shares; 2025Q4: 1,836,381 shares 1,836,381$23.7M8.71%-612,774Timeline
HGVHILTON GRAND VACATIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 311,673 shares; 2024Q4: 299,963 shares; 2025Q1: 289,601 shares; 2025Q2: 198,602 shares; 2025Q3: 274,055 shares; 2025Q4: 464,964 shares 464,964$20.8M7.66%+190,909Timeline
POSTPOST HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 171,188 shares; 2024Q4: 206,013 shares; 2025Q1: 173,674 shares; 2025Q2: 139,955 shares; 2025Q3: 119,081 shares; 2025Q4: 169,125 shares 169,125$16.8M6.17%+50,044Timeline
LADLITHIA MTRS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 65,641 shares; 2024Q4: 53,849 shares; 2025Q1: 61,424 shares; 2025Q2: 53,371 shares; 2025Q3: 47,298 shares; 2025Q4: 47,182 shares 47,182$15.7M5.77%-116Timeline
PGENPRECIGEN INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,775,960 shares; 2024Q4: 5,241,922 shares; 2025Q1: 4,585,809 shares; 2025Q2: 4,278,662 shares; 2025Q3: 3,666,946 shares; 2025Q4: 3,600,195 shares 3,600,195$15M5.54%-66,751Timeline
TNLTRAVEL PLUS LEISURE COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 534,156 shares; 2024Q4: 503,893 shares; 2025Q1: 477,224 shares; 2025Q2: 438,650 shares; 2025Q3: 305,415 shares; 2025Q4: 209,844 shares 209,844$14.8M5.45%-95,571Timeline
AXSMAXSOME THERAPEUTICS INC.Quarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 126,803 shares; 2024Q4: 125,079 shares; 2025Q1: 106,312 shares; 2025Q2: 91,761 shares; 2025Q3: 83,553 shares; 2025Q4: 73,783 shares 73,783$13.5M4.96%-9,770Timeline
BILLBILL HOLDINGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 294,668 shares; 2024Q4: 53,705 shares; 2025Q1: 109,849 shares; 2025Q2: 144,427 shares; 2025Q3: 151,554 shares; 2025Q4: 187,404 shares 187,404$10.2M3.76%+35,850Timeline
RTORENTOKIL INITIAL PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 719,795 shares; 2024Q4: 728,764 shares; 2025Q1: 828,361 shares; 2025Q2: 697,212 shares; 2025Q3: 614,609 shares; 2025Q4: 306,397 shares 306,397$9.03M3.32%-308,212Timeline
ELVELEVANCE HEALTH INC FORMERLYQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 39,154 shares; 2024Q4: 60,197 shares; 2025Q1: 51,991 shares; 2025Q2: 46,622 shares; 2025Q3: 52,103 shares; 2025Q4: 25,074 shares 25,074$8.79M3.24%-27,029Timeline
ESIELEMENT SOLUTIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 290,769 shares; 2024Q4: 258,845 shares; 2025Q1: 259,065 shares; 2025Q2: 210,724 shares; 2025Q3: 192,525 shares; 2025Q4: 264,211 shares 264,211$6.6M2.43%+71,686Timeline
BALLBALL CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 22,971 shares; 2025Q2: 26,848 shares; 2025Q3: 46,624 shares; 2025Q4: 122,835 shares 122,835$6.51M2.4%+76,211Timeline
CCKCROWN HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 195,849 shares; 2024Q4: 222,292 shares; 2025Q1: 197,782 shares; 2025Q2: 82,664 shares; 2025Q3: 56,650 shares; 2025Q4: 60,365 shares 60,365$6.22M2.29%+3,715Timeline
DBRGDIGITALBRIDGE GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 387,827 shares; 2024Q4: 365,504 shares; 2025Q1: 393,723 shares; 2025Q2: 351,017 shares; 2025Q3: 399,393 shares; 2025Q4: 399,771 shares 399,771$6.13M2.26%+378Timeline
KPLTKATAPULT HOLDINGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 400,000 shares; 2024Q4: 438,000 shares; 2025Q1: 576,648 shares; 2025Q2: 564,844 shares; 2025Q3: 308,616 shares; 2025Q4: 920,000 shares 920,000$5.94M2.19%+611,384Timeline
AVADEL PHARMACEUTICALSAVADEL PHARMACEUTICALSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 167,700 shares; 2024Q4: 169,586 shares; 2025Q1: 249,586 shares; 2025Q2: 249,586 shares; 2025Q3: 249,586 shares; 2025Q4: 247,086 shares 247,086$5.32M1.96%-2,500
CRLCHARLES RIV LABS INTL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 55,043 shares; 2024Q4: 50,965 shares; 2025Q1: 60,419 shares; 2025Q2: 47,566 shares; 2025Q3: 28,626 shares; 2025Q4: 26,568 shares 26,568$5.3M1.95%-2,058Timeline
GENGEN DIGITAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 482,450 shares; 2024Q4: 441,492 shares; 2025Q1: 413,578 shares; 2025Q2: 231,511 shares; 2025Q3: 193,957 shares; 2025Q4: 190,232 shares 190,232$5.17M1.9%-3,725Timeline
LPLALPL FINL HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 82,834 shares; 2024Q4: 28,902 shares; 2025Q1: 20,901 shares; 2025Q2: 13,937 shares; 2025Q3: 13,847 shares; 2025Q4: 14,385 shares 14,385$5.14M1.89%+538Timeline
CLVTCLARIVATE PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,045,679 shares; 2024Q4: 1,120,550 shares; 2025Q1: 1,152,149 shares; 2025Q2: 905,076 shares; 2025Q3: 1,002,958 shares; 2025Q4: 1,528,410 shares 1,528,410$5.1M1.88%+525,452Timeline
ONON SEMICONDUCTOR CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 90,709 shares; 2024Q4: 88,355 shares; 2025Q1: 105,460 shares; 2025Q2: 69,740 shares; 2025Q3: 62,854 shares; 2025Q4: 91,632 shares 91,632$4.96M1.83%+28,778Timeline
NVCTNUVECTIS PHARMA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 55,380 shares; 2024Q4: not reported; 2025Q1: 253,972 shares; 2025Q2: 372,717 shares; 2025Q3: 405,621 shares; 2025Q4: 586,320 shares 586,320$4.43M1.63%+180,699Timeline
FLEXFLEX LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 533,225 shares; 2024Q4: 146,884 shares; 2025Q1: 104,144 shares; 2025Q2: 100,290 shares; 2025Q3: 78,916 shares; 2025Q4: 69,932 shares 69,932$4.23M1.56%-8,984Timeline
NESRNATIONAL ENERGY SERVICES REUQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 153,836 shares; 2025Q1: 273,944 shares; 2025Q2: 224,765 shares; 2025Q3: 252,754 shares; 2025Q4: 240,383 shares 240,383$3.76M1.39%-12,371Timeline
BKRBAKER HUGHES COMPANYQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 145,094 shares; 2024Q4: 78,958 shares; 2025Q1: 70,026 shares; 2025Q2: 73,826 shares; 2025Q3: 63,016 shares; 2025Q4: 57,686 shares 57,686$2.63M0.97%-5,330Timeline
ICEINTERCONTINENTAL EXCHANGE INQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 24,477 shares; 2024Q4: 22,364 shares; 2025Q1: 16,117 shares; 2025Q2: 11,493 shares; 2025Q3: 10,062 shares; 2025Q4: 16,166 shares 16,166$2.62M0.96%+6,104Timeline
QSRRESTAURANT BRANDS INTL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 61,838 shares; 2024Q4: 107,983 shares; 2025Q1: 115,870 shares; 2025Q2: 46,615 shares; 2025Q3: 47,389 shares; 2025Q4: 36,710 shares 36,710$2.5M0.92%-10,679Timeline
TGTXTG THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 47,532 shares; 2024Q4: 47,532 shares; 2025Q1: 47,532 shares; 2025Q2: 47,532 shares; 2025Q3: 75,289 shares; 2025Q4: 75,289 shares 75,289$2.24M0.83%0Timeline
KKRKKR & CO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 27,084 shares; 2024Q4: 20,825 shares; 2025Q1: 20,015 shares; 2025Q2: 18,285 shares; 2025Q3: 16,405 shares; 2025Q4: 17,258 shares 17,258$2.2M0.81%+853Timeline
SLBSLB LIMITEDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 60,916 shares; 2025Q4: 55,494 shares 55,494$2.13M0.78%-5,422Timeline
ENRENERGIZER HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 95,539 shares 95,539$1.9M0.7%newTimeline
YOUCLEAR SECURE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 164,572 shares; 2024Q4: 180,175 shares; 2025Q1: 167,737 shares; 2025Q2: 172,858 shares; 2025Q3: 47,687 shares; 2025Q4: 43,902 shares 43,902$1.54M0.57%-3,785Timeline
MOHMOLINA HEALTHCARE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,522 shares; 2024Q4: 2,522 shares; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 9,557 shares; 2025Q4: 8,200 shares 8,200$1.42M0.52%-1,357Timeline
GTLSCHART INDS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 42,957 shares; 2024Q4: 35,890 shares; 2025Q1: 30,468 shares; 2025Q2: 31,107 shares; 2025Q3: 29,377 shares; 2025Q4: 6,326 shares 6,326$1.3M0.48%-23,051Timeline
LHLABCORP HOLDINGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 22,216 shares; 2024Q4: 20,495 shares; 2025Q1: 4,223 shares; 2025Q2: 3,907 shares; 2025Q3: 3,993 shares; 2025Q4: 3,644 shares 3,644$914K0.34%-349Timeline
GBTCGRAYSCALE BITCOIN TRUST ETFQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 20,300 shares; 2024Q4: 11,836 shares; 2025Q1: 10,559 shares; 2025Q2: 10,559 shares; 2025Q3: 10,559 shares; 2025Q4: 10,559 shares 10,559$722K0.27%0Timeline
RHRHQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 2,995 shares 2,995$537K0.2%newTimeline
IWRISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 72,500 shares; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 5,220 shares 5,220$503K0.19%newTimeline
ALITALIGHT INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 218,252 shares 218,252$426K0.16%newTimeline
NKTRNEKTAR THERAPEUTICSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 9,728 shares 9,728$411K0.15%newTimeline
CLNECLEAN ENERGY FUELS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 146,377 shares; 2024Q4: 146,377 shares; 2025Q1: 247,468 shares; 2025Q2: 247,468 shares; 2025Q3: 141,549 shares; 2025Q4: 141,549 shares 141,549$297K0.11%0Timeline
ZZILLOW GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 6,286 shares; 2024Q4: 6,166 shares; 2025Q1: 5,816 shares; 2025Q2: 4,571 shares; 2025Q3: 3,952 shares; 2025Q4: 3,682 shares 3,682$251K0.09%-270Timeline

Sold out in Q4 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
LNWOLIGHT & WONDER INC81,186$6.81Mshares
WBDWARNER BROS DISCOVERY INC143,177$2.8Mshares
IMRXIMMUNEERING CORP275,086$1.93Mshares
FTREFORTREA HLDGS INC29,965$252Kshares
ETHGRAYSCALE ETHEREUM STAKING5,465$214Kshares

How Q4 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001033427-26-000003 base2026-01-23acceptance time not in the bulk data set