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GROUP ONE TRADING LLC

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13F filer, CIK 932540, CHICAGO, IL

GROUP ONE TRADING LLC reported $52,178,973,769 across 7,822 holdings for the quarter ended 2026-03-31, in a 13F-HR filed 2026-05-13. Its ten largest share positions make up 15.31% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000932540-26-000005

Period
2026-03-31
Reported value
$52.2B
Holdings
7,822
Top 10 weight
15.31%
New
1,226
Sold out
1,747

Largest buys vs the previous quarter

SecurityShares changeApprox. value
URAadded+1,215,634$58.9M
TSMadded+119,560$40.4M
URNMnew+578,353$36.5M
MUadded+94,616$32M
EWYnew+251,879$31M

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
SILJreduced-1,335,282-$39.7M
WBDreduced-1,339,811-$36.8M
AMDexited-150,696-$32.3M
TIGRreduced-4,053,231-$25.5M
CARreduced-165,885-$24.2M

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.

Back to all 2,167 share positions

Options

Puts and calls, as filed. The amount and value describe the underlying shares, not the option premium, so they stay out of % of portfolio (H5).

SecurityTypeAmountValueChange
MAMMOTH ENERGY SVCS INCMAMMOTH ENERGY SVCS INC COMcall600$1.47Knew
KORNIT DIGITAL LTDKORNIT DIGITAL LTD SHScall100$1.47K-1,500
RED ROBIN GOURMET BURGERS INRED ROBIN GOURMET BURGERS IN COMcall500$1.47K-18,000
STONERIDGE INCSTONERIDGE INC COMcall300$1.45K-4,700
THEMES ETF TRTHEMES ETF TR LEVERAGE SHS 2Xput500$1.44K-200
CIA ENERGETICA DE MINAS GERACIA ENERGETICA DE MINAS GERA SP ADR N-V PFDput600$1.43Knew
INFLARX NVINFLARX NV COMput1,600$1.43K-13,900
LOOP INDS INCLOOP INDS INC COMput1,000$1.43K0
DOLE PLCDOLE PLC ORD SHScall100$1.43K-2,800
FRANKLIN SOLANA TRFRANKLIN SOLANA TR EXCHANGE TRD FDput100$1.42Knew
PRIORITY TECHNOLOGY HLDGS INPRIORITY TECHNOLOGY HLDGS IN COMcall300$1.42K-1,400
PANGAEA LOGISTICS SOLUTION LPANGAEA LOGISTICS SOLUTION L PUTput200$1.42Knew
TIDAL TRUST IITIDAL TRUST II YIE HIM INC ETFput100$1.41Knew
ENHABIT INCENHABIT INC CALLcall100$1.41K0
GH RESEARCH PLCGH RESEARCH PLC ORDINARY SHAREScall100$1.41Knew
GH RESEARCH PLCGH RESEARCH PLC PUTput100$1.41K0
MACH NATURAL RESOURCES LPMACH NATURAL RESOURCES LP COM UN LT PA INcall100$1.4Knew
ADAPTIVE BIOTECHNOLOGIES CORADAPTIVE BIOTECHNOLOGIES COR PUTput100$1.39K-1,600
RUNWAY GROWTH FINANCE CORPRUNWAY GROWTH FINANCE CORP COMput200$1.37K-900
PAYSAFE LIMITEDPAYSAFE LIMITED PUTput200$1.36K-7,700
NORTH AMERN CONSTR GROUP LTDNORTH AMERN CONSTR GROUP LTD COMput100$1.35K0
INVESTMENT MANAGERS SER TR IINVESTMENT MANAGERS SER TR I TRADR 2X CLS ETFput100$1.33Knew
ORION S.A.ORION S.A. PUTput200$1.3Knew
SASOL LTDSASOL LTD PUTput100$1.3K-1,600
LITE STRATEGY INCLITE STRATEGY INC COMcall1,100$1.28K-73,000
FATHOM HOLDINGS INCFATHOM HOLDINGS INC COMcall2,400$1.27K-25,800
NKARTA INCNKARTA INC COMcall600$1.27K-600
SI BONE INCSI BONE INC COMcall100$1.26Knew
PATRIA INVESTMENTS LIMITEDPATRIA INVESTMENTS LIMITED COM CL Aput100$1.26Knew
AIRJOULE TECHNOLOGIES CORPAIRJOULE TECHNOLOGIES CORP CL Acall500$1.25K0
CHERRY HILL MTG INVT CORPCHERRY HILL MTG INVT CORP PUTput500$1.25K0
AMERICAN VANGUARD CORPAMERICAN VANGUARD CORP COMcall500$1.25K+100
PATTERN GROUP INCPATTERN GROUP INC COM SER Aput100$1.24Knew
STAR GROUP LPSTAR GROUP LP UNIT LTD PARTNRput100$1.23Knew
GEOSPACE TECHNOLOGIES CORPGEOSPACE TECHNOLOGIES CORP COMput100$1.22K-400
XENCOR INCXENCOR INC PUTput100$1.21K-100
ETF OPPORTUNITIES TRUSTETF OPPORTUNITIES TRUST T REX 2X LONG CIput100$1.19K-700
ORGANOGENESIS HLDGS INCORGANOGENESIS HLDGS INC CALLcall500$1.19K-4,100
NANO LABS LTDNANO LABS LTD PUTput400$1.18K-5,000
NLI HOLDINGS INCNLI HOLDINGS INC COM NEWcall200$1.17K0
NLI HOLDINGS INCNLI HOLDINGS INC COM NEWput200$1.17K-54,400
MANITOWOC CO INCMANITOWOC CO INC COM NEWput100$1.17K0
LIFETIME BRANDS INCLIFETIME BRANDS INC COMput200$1.15K+100
EVERCOMMERCE INCEVERCOMMERCE INC COMput100$1.14K0
GRID DYNAMICS HLDGS INCGRID DYNAMICS HLDGS INC CL Acall200$1.14K+100
ROUNDHILL ETF TRUSTROUNDHILL ETF TRUST ETHER CVD CLL STcall100$1.14K-100
VIRTRA INCVIRTRA INC PUTput300$1.11K-100
NEWTEKONE INCNEWTEKONE INC COM NEWput100$1.09K-1,900
ACCEL ENTERTAINMENT INCACCEL ENTERTAINMENT INC COM CL A1call100$1.09K0
GERDAU SAGERDAU SA SPON ADR REP PFDput300$1.08K-5,400
BLACKROCK TCP CAPITAL CORPBLACKROCK TCP CAPITAL CORP PUTput300$1.08K0
RF INDS LTDRF INDS LTD COM PAR $0.01put100$1.03Knew
HEALTH CATALYST INCHEALTH CATALYST INC PUTput800$1.02Knew
OATLY GROUP ABOATLY GROUP AB SPONSORED ADScall100$1.01K-187,400
HELIX ENERGY SOLUTIONS GRP IHELIX ENERGY SOLUTIONS GRP I COMput100$989-3,800
THREDUP INCTHREDUP INC CL Acall300$984-57,700
BGC GROUP INCBGC GROUP INC CL Aput100$9780
AVEPOINT INCAVEPOINT INC PUTput100$951new
OUTLOOK THERAPEUTICS INCOUTLOOK THERAPEUTICS INC COMput4,500$926-72,100
INFUSYSTEM HLDGS INCINFUSYSTEM HLDGS INC COMput100$9230
GRAN TIERRA ENERGY INCGRAN TIERRA ENERGY INC COMcall100$897new
ENTRAVISION COMMUNICATIONS CENTRAVISION COMMUNICATIONS C CL Aput300$891-400
MANHATTAN BRDG CAP INCMANHATTAN BRDG CAP INC COMcall200$890new
GOLDMAN SACHS BDC INCGOLDMAN SACHS BDC INC PUTput100$888-300
JOINT CORPJOINT CORP COMcall100$8850
EMBECTA CORPEMBECTA CORP PUTput100$884new
FOSSIL GROUP INCFOSSIL GROUP INC COMcall200$862-112,500
PURPLE INNOVATION INCPURPLE INNOVATION INC COMcall1,300$860-39,400
NOODLES & CONOODLES & CO CL A NEWcall100$855new
NRX PHARMACEUTICALS INCNRX PHARMACEUTICALS INC PUTput400$852+300
HILLMAN SOLUTIONS CORPHILLMAN SOLUTIONS CORP COMput100$832new
BITGO HOLDINGS INCBITGO HOLDINGS INC COM SHS CL Aput100$823new
MIZUHO FINANCIAL GROUP INCMIZUHO FINANCIAL GROUP INC SPONSORED ADRput100$794-2,300
NUVECTIS PHARMA INCNUVECTIS PHARMA INC COMput100$773-6,500
CONSUMER PORTFOLIO SVCS INCCONSUMER PORTFOLIO SVCS INC COMput100$7730
REPOSITRAK INCREPOSITRAK INC COM NEWcall100$760-1,200
DATA I O CORPDATA I O CORP COMcall300$759-100
COLLPLANT BIOTECHNOLOGIES LTCOLLPLANT BIOTECHNOLOGIES LT SHS NEWput1,400$7490
SCRIPPS E W CO OHIOSCRIPPS E W CO OHIO CL A NEWcall200$744new
ADAMAS TRUST INC.ADAMAS TRUST INC. COMput100$736new
NN INCNN INC COMput500$725new
ABOVE FOOD INGREDIENTS INCABOVE FOOD INGREDIENTS INC PUTput700$707+100
IZEA WORLDWIDE INCIZEA WORLDWIDE INC COM NEWcall200$702-400
VOC ENERGY TRVOC ENERGY TR TR UNITput200$6920
ADICET BIO INCADICET BIO INC COM NEWput100$681new
AUREUS GREENWAY HLDGS INCAUREUS GREENWAY HLDGS INC COMcall200$678new
ALLOT LTDALLOT LTD SHSput100$666-4,900
CUMBERLAND PHARMACEUTICALS ICUMBERLAND PHARMACEUTICALS I PUTput200$650-10,600
AUDIOEYE INCAUDIOEYE INC CALLcall100$637-500
CELLECTIS S ACELLECTIS S A SPON ADSput200$634-400
EPSILON ENERGY LTDEPSILON ENERGY LTD COMcall100$6160
ALGONQUIN POWER & UTILITIESALGONQUIN POWER & UTILITIES Callcall100$614new
TROOPS INCTROOPS INC SHScall300$612new
MYOMO INCMYOMO INC COM NEWcall900$608-4,100
SUI GROUP HOLDINGS LIMITEDSUI GROUP HOLDINGS LIMITED COM NEWput500$605-18,900
FATE THERAPEUTICS INCFATE THERAPEUTICS INC COMput500$600-8,500
AGNT INCAGNT INC PUTput100$599new
WM TECHNOLOGY INCWM TECHNOLOGY INC PUTput900$593-11,500
OFFERPAD SOLUTIONS INCOFFERPAD SOLUTIONS INC PUTput900$590-14,400
HUDSON TECHNOLOGIES INCHUDSON TECHNOLOGIES INC COMput100$588new
NEURONETICS INCNEURONETICS INC COMcall400$580-14,600
UNDER ARMOUR INCUNDER ARMOUR INC CL Cput100$579-16,100
WIMI HOLOGRAM CLOUD INCWIMI HOLOGRAM CLOUD INC PUTput300$576-10,100
LEXEO THERAPEUTICS INCLEXEO THERAPEUTICS INC COMcall100$574-1,000
COMMERCE.COM INCCOMMERCE.COM INC COM SER 1put200$534-52,900
VERASTEM INCVERASTEM INC COM NEWput100$530-2,000
EMPIRE ST RLTY TR INCEMPIRE ST RLTY TR INC PUTput100$5200
JANUS INTERNATIONAL GROUP INJANUS INTERNATIONAL GROUP IN COMMON STOCKput100$515-400
LESAKA TECHNOLOGIES INCLESAKA TECHNOLOGIES INC COM NEWput100$509new
DOCGO INCDOCGO INC PUTput800$5030
LUNAI BIOWORKS INCLUNAI BIOWORKS INC COM SHScall1,200$489new
NOVONIX LIMITEDNOVONIX LIMITED PUTput700$483-5,000
CLAROS MTG TR INCCLAROS MTG TR INC COMMON STOCKput200$476-3,200
ORGANOGENESIS HLDGS INCORGANOGENESIS HLDGS INC COMput200$474new
N-ABLE INCN-ABLE INC COMMON STOCKcall100$467-900
BEAM GLOBALBEAM GLOBAL COMput300$441-900
LIFEVANTAGE CORPLIFEVANTAGE CORP COM NEWcall100$432new
ORCHESTRA BIOMED HLDGS INCORCHESTRA BIOMED HLDGS INC COMput100$425new
SPRUCE POWER HOLDING CORPSPRUCE POWER HOLDING CORP CALLcall100$410-400
SENSUS HEALTHCARE INCSENSUS HEALTHCARE INC COMcall100$398-1,900
NAUTILUS BIOTECHNOLOGY INCNAUTILUS BIOTECHNOLOGY INC COMcall100$388new
CPS TECHNOLOGIES CORPCPS TECHNOLOGIES CORP COMcall100$374-21,500
IDENTIV INCIDENTIV INC PUTput100$3700
PROSHARES TRPROSHARES TR ULTRA XRP ETFput100$369-500
OFS CAP CORPOFS CAP CORP PUTput100$355new
COMMERCIAL VEH GROUP INCCOMMERCIAL VEH GROUP INC COMcall100$341-700
DIGINEX LTDDIGINEX LTD PUTput700$336-23,400
TRANSACT TECHNOLOGIES INCTRANSACT TECHNOLOGIES INC CALLcall100$329new
THREDUP INCTHREDUP INC CL Aput100$328-300
INSIGHT MOLECULAR DIA INCINSIGHT MOLECULAR DIA INC CALLcall100$328new
CARDIFF ONCOLOGY INCCARDIFF ONCOLOGY INC COMput200$324-9,500
DULUTH HLDGS INCDULUTH HLDGS INC PUTput100$3160
YATSEN HLDG LTDYATSEN HLDG LTD SPONSORED ADScall100$308-200
BEAM GLOBALBEAM GLOBAL COMcall200$294-200
MERCER INTL INCMERCER INTL INC COMput200$2840
NANOVIRICIDES INCNANOVIRICIDES INC CALLcall300$274-9,100
C4 THERAPEUTICS INCC4 THERAPEUTICS INC PUTput100$263-3,000
REE AUTOMOTIVE LTDREE AUTOMOTIVE LTD SHS CL A NEWcall400$2400
LARGO INCLARGO INC COMput200$224-26,400
NAKAMOTO INCNAKAMOTO INC PUTput1,000$221-1,236,400
KINDERCARE LEARNING COMPANIEKINDERCARE LEARNING COMPANIE COMcall100$220-46,300
CASTOR MARITIME INCCASTOR MARITIME INC PUTput100$1850
YIREN DIGITAL LTDYIREN DIGITAL LTD PUTput100$172-6,300
DYADIC INTL INC DELDYADIC INTL INC DEL COMcall200$164-6,500
GETTY IMAGES HOLDINGS INCGETTY IMAGES HOLDINGS INC CL A COMput200$159+100
SOLAI LIMITEDSOLAI LIMITED SPON ADRcall200$157-4,400
SOLAI LIMITEDSOLAI LIMITED SPON ADRput200$157-2,000
RANI THERAPEUTICS HLDGS INCRANI THERAPEUTICS HLDGS INC COM CL Aput200$147-100
HAIN CELESTIAL GROUP INCHAIN CELESTIAL GROUP INC COMput200$140-15,700
BLINK CHARGING COBLINK CHARGING CO COMput200$113-39,800
VIVANI MEDICAL INCVIVANI MEDICAL INC COMMON STOCKcall100$100-11,600
THE BRAND HOUSE COLLECTIVE ITHE BRAND HOUSE COLLECTIVE I COMcall100$93-34,500
IT TECH PACKAGING INCIT TECH PACKAGING INC COM NEWcall500$91+400
SELECTQUOTE INCSELECTQUOTE INC PUTput100$630
TRINITY BIOTECH INVT LTDTRINITY BIOTECH INVT LTD CALLcall100$54-22,600

Sold out in Q1 2026

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

The largest 100 of 1,747. All 1,747

SecurityShares beforeValue beforeType
CONFLUENT INCCONFLUENT INC1,128,700$34.1Mcall
NEW GOLD INCNEW GOLD INC3,882,300$33.8Mcall
AMDADVANCED MICRO DEVICES INC150,696$32.3Mshares
COMERICA INCCOMERICA INC311,900$27.1Mcall
GUESS? INCGUESS? INC1,497,100$25.1Mput
NOVA LTDNOVA LTD71,900$23.6Mput
STRIVE INCSTRIVE INC29,858,700$22Mcall
PLTRPALANTIR TECHNOLOGIES INC87,951$15.6Mshares
EXACT SCIENCES CORPEXACT SCIENCES CORP152,400$15.5Mcall
NEMNEWMONT CORP153,462$15.3Mshares
CIDARA THERAPEUTICS INCCIDARA THERAPEUTICS INC65,000$14.4Mcall
SOXLDIREXION SHARES ETF TRUST337,542$14.2Mshares
FUTUFUTU HLDGS LTD85,957$14.1Mshares
COSTCOSTCO WHOLESALE CORPORATION16,091$13.9Mshares
AMCOR PLCAMCOR PLC1,443,700$12Mcall
WDCWESTERN DIGITAL CORP68,783$11.8Mshares
ADAPTHEALTH CORPADAPTHEALTH CORP1,048,300$10.4Mcall
TEVATEVA PHARMACEUTICAL INDS LTD320,801$10Mshares
SHOPSHOPIFY INC61,953$9.97Mshares
VRTVERTIV HOLDINGS CO60,261$9.76Mshares
U S PHYSICAL THERAPYU S PHYSICAL THERAPY124,900$9.75Mcall
LMTLOCKHEED MARTIN CORP17,532$8.48Mshares
ASTRAZENECA PLC-SPONS ADRASTRAZENECA PLC-SPONS ADR88,300$8.12Mcall
SNDKSANDISK CORP33,387$7.93Mshares
YPFYPF SOCIEDAD ANONIMA211,359$7.64Mshares
NBISNEBIUS GROUP N.V.88,465$7.4Mshares
SLVRSPROTT FDS TR128,449$7.17Mshares
CONFLUENT INCCONFLUENT INC236,600$7.15Mput
Cidara Therapeutics IncCidara Therapeutics Inc31,300$6.91Mput
IDEXX LABS INCIDEXX LABS INC10,000$6.77Mput
CRDOCREDO TECHNOLOGY GROUP HOLDI46,101$6.63Mshares
ANAPTYSBIO INCANAPTYSBIO INC136,600$6.62Mcall
ASMLASML HLDG NV6,172$6.6Mshares
DGDOLLAR GEN CORP48,814$6.48Mshares
IONQIONQ INC141,647$6.36Mshares
FTAIFTAI AVIATION LTD32,224$6.34Mshares
KRKROGER CO100,201$6.26Mshares
XRTSPDR SERIES TRUST70,879$6.05Mshares
WD 40 COWD 40 CO30,000$5.91Mcall
QORVO INCQORVO INC68,600$5.8Mcall
CIFRCIPHER DIGITAL INC392,460$5.79Mshares
OXYOCCIDENTAL PETE CORP139,502$5.74Mshares
UNIVERSAL DISPLAY CORPUNIVERSAL DISPLAY CORP49,000$5.72Mcall
AMATAPPLIED MATLS INC21,809$5.6Mshares
GMGENERAL MTRS CO68,566$5.58Mshares
CATCATERPILLAR INC9,694$5.55Mshares
HUTHUT 8 CORP119,264$5.48Mshares
XLKSELECT SECTOR SPDR TR37,738$5.43Mshares
GLXYGALAXY DIGITAL INC.240,114$5.37Mshares
GLDSPDR GOLD TR13,453$5.33Mshares
LNGCHENIERE ENERGY INC27,405$5.33Mshares
MIND MEDICINE MINDMED INCMIND MEDICINE MINDMED INC377,000$5.05Mcall
ISHARES TRISHARES TR40,900$4.97Mcall
RIORIO TINTO PLC61,665$4.94Mshares
UNIVERSAL HLTH SVCS INCUNIVERSAL HLTH SVCS INC22,500$4.91Mcall
ARMARM HOLDINGS PLC44,562$4.87Mshares
CHURCHILL CAP CORP XCHURCHILL CAP CORP X308,400$4.81Mcall
GFSGLOBALFOUNDRIES INC137,360$4.8Mshares
GPGIGPGI INC231,710$4.47Mshares
EXACT SCIENCES CORPEXACT SCIENCES CORP43,900$4.46Mput
FUBOTV INCFUBOTV INC1,729,100$4.36Mcall
LRCXLAM RESEARCH CORP25,341$4.34Mshares
COMERICA INCCOMERICA INC49,500$4.3Mput
MSC INDL DIRECT INCMSC INDL DIRECT INC50,100$4.21Mcall
MSC INDL DIRECT INCMSC INDL DIRECT INC50,000$4.21Mput
IDXXIDEXX LABS INC6,212$4.2Mshares
VEEVVEEVA SYS INC18,720$4.18Mshares
TOPBUILD CORTOPBUILD COR10,000$4.17Mput
DIREXION SHS ETF TRDIREXION SHS ETF TR1,319,300$4.13Mput
RTXRTX CORPORATION21,536$3.95Mshares
WFCWELLS FARGO & CO42,309$3.94Mshares
MAMASTERCARD INCORPORATED6,873$3.92Mshares
NUNU HLDGS LTD233,459$3.91Mshares
RIGTRANSOCEAN LTD940,572$3.88Mshares
SQMSOCIEDAD QUIMICA Y MINERA DE56,243$3.87Mshares
YANGDIREXION SHARES ETF TRUST153,744$3.87Mshares
CRMSALESFORCE INC14,120$3.74Mshares
FUBOTV INCFUBOTV INC1,472,500$3.71Mput
RADNET INCRADNET INC51,000$3.64Mcall
JNJJOHNSON & JOHNSON17,037$3.53Mshares
TECKTECK RESOURCES LTD72,612$3.48Mshares
FLUTFLUTTER ENTMT PLC16,156$3.47Mshares
SPHRSPHERE ENTERTAINMENT CO36,471$3.47Mshares
NEXTNEXTDECADE CORP657,193$3.46Mshares
MCYMERCURY GENL CORP NEW36,156$3.4Mshares
RVMDREVOLUTION MEDICINES INC40,145$3.2Mshares
CVXCHEVRON CORPORATION20,592$3.14Mshares
KODKEASTMAN KODAK CO362,158$3.06Mshares
LEUCENTRUS ENERGY CORP12,470$3.03Mshares
EXEEXPAND ENERGY CORPORATION26,692$2.95Mshares
TERNTERNS PHARMACEUTICALS INC70,844$2.86Mshares
ARGAN INCARGAN INC9,000$2.82Mput
TNADIREXION SHARES ETF TRUST61,556$2.8Mshares
BWABORGWARNER INC62,005$2.79Mshares
ROKUROKU INC25,650$2.78Mshares
TJXTJX COS INC NEW18,046$2.77Mshares
AVIDITY BIOSCIENCES INCAVIDITY BIOSCIENCES INC38,400$2.77Mcall
CUMMINS INCCUMMINS INC5,300$2.71Mput
SCHWCHARLES SCHWAB CORP (THE)26,939$2.69Mshares
ASHRDBX ETF TR80,959$2.66Mshares

How Q1 2026 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 0000932540-26-000005 base2026-05-13acceptance time not in the bulk data set