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Livermore
Livermore
ZHEN

Group One Trading, L.P.

SEC CIK
0000932540
Latest filing
Aug 13, 2026

The latest 13F from Group One Trading, L.P. covers Q2 2026 (filed Aug 13, 2026): 2,157 long positions worth $3.47B. The top 10 holdings make up 17.8% of the portfolio, and the largest is Roundhill ETF Trust at 3.1%. Livermore has 23 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q2 2026

Share counts compared with Q1 2026: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
631
Est. +$724.8M
Added
578
Est. +$787.5M
Reduced
802
Est. −$1.08B
Sold out
641
Est. −$397.9M

Top 5 holdings

Share of this quarter's portfolio value

  1. Roundhill ETF Trust77926X320
    3.1%$108.6M
  2. TSMTaiwan Semiconductor Manufacturing Co Ltd
    2.7%$92.3MHistory
  3. MUMicron Technology Inc
    2.4%$84.2MHistory
  4. Global X Uranium ETF37954Y871
    2.3%$79.5M
  5. MRVLMarvell Technology, Inc.
    1.6%$55.7MHistory

Biggest buys

New and added positions, by estimated amount bought

  1. Roundhill ETF Trust77926X320
    +$108.6MNew
  2. UNHUnitedHealth Group Inc
    +$42.1MAddedHistory
  3. MRVLMarvell Technology, Inc.
    +$41.5MAddedHistory
  4. BKNGBooking Holdings Inc.
    +$34.2MNewHistory
  5. TSMTaiwan Semiconductor Manufacturing Co Ltd
    +$26.4MAddedHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. Roundhill ETF Trust77926X320
    +3.13 pp0.0% → 3.1%
  2. MRVLMarvell Technology, Inc.
    +1.45 pp0.2% → 1.6%History
  3. UNHUnitedHealth Group Inc
    +1.29 pp0.2% → 1.5%History
  4. TSMTaiwan Semiconductor Manufacturing Co Ltd
    +1.12 pp1.5% → 2.7%History
  5. BKNGBooking Holdings Inc.
    +0.99 pp0.0% → 1.0%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. MUMicron Technology Inc
    −$95.5MReducedHistory
  2. Amplify ETF Tr032108649
    −$58.3MReduced
  3. INTCIntel Corp
    −$50.9MReducedHistory
  4. iShares Inc464286772
    −$43.4MReduced
  5. CYTKCytokinetics Inc
    −$24.0MSold outHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. Amplify ETF Tr032108649
    −2.25 pp2.4% → 0.1%
  2. PBRPetrobras - Petroleo Brasileiro SA
    −0.84 pp1.1% → 0.2%History
  3. iShares Inc464286772
    −0.81 pp1.0% → 0.2%
  4. CYTKCytokinetics Inc
    −0.79 pp0.8% → 0.0%History
  5. AGFirst Majestic Silver Corp
    −0.73 pp1.4% → 0.6%History

Metrics

13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$3.47B
+$440.7M (+14.6%) vs. prior quarter
Positions
2,157
−10 vs. prior quarter
Top 10 concentration
17.8%
Top 10 as share of value
Turnover
45.4%
Q2 2026, one quarter
Average holding period
6.0 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

22 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $5.32B (Q4 2021)

Q1 2021: $4.57BQ2 2021: $5.22BQ3 2021: $4.59BQ4 2021: $5.32BQ1 2022: $4.58BQ2 2022: $3.50BQ3 2022: $3.06BQ4 2022: $2.96BQ1 2023: $2.10BQ2 2023: $2.34BQ3 2023: $2.52BQ4 2023: $3.18BQ1 2024: $2.81BQ2 2024: $3.17BQ3 2024: $2.53BQ4 2024: $2.94BQ1 2025: $2.40BQ2 2025: $3.05BQ3 2025: $3.34BQ4 2025: $3.38BQ1 2026: $3.03BQ2 2026: $3.47B
Q1 2021Q2 2026
13F filings of Group One Trading, L.P. by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 13, 20262,157$3.47BRoundhill ETF TrustTSMMUvs. Q1 2026SEC
Q1 2026May 13, 20262,167$3.03BGlobal X Uranium ETFAmplify ETF TrMUvs. Q4 2025SEC
Q4 2025Feb 12, 20262,291$3.38BAmplify ETF TrIRENWBDvs. Q3 2025SEC
Q3 2025Nov 12, 20252,243$3.34BIRENHOODBMNRvs. Q2 2025SEC
Q2 2025Aug 14, 20252,001$3.05BIRENMSTRHOODvs. Q1 2025SEC
Q1 2025May 14, 20251,918$2.40BIRENMSTRARMvs. Q4 2024SEC
Q4 2024May 14, 2025Amended1,993$2.94BIRENUNHCOINvs. Q3 2024SEC
Q3 2024Nov 14, 20241,677$2.53BASTSHOODCvs. Q2 2024SEC
Q2 2024Aug 14, 20241,704$3.17BNVDAMSFTAMDvs. Q1 2024SEC
Q1 2024May 10, 20241,719$2.81BNVDAAMDBABAvs. Q4 2023SEC
Q4 2023Feb 14, 20241,837$3.18BAMDNVDATSLAvs. Q3 2023SEC
Q3 2023Nov 9, 20231,877$2.52BGOOGBABAALBvs. Q2 2023SEC
Q2 2023Aug 9, 20231,748$2.34BTSLAAMDBABAvs. Q1 2023SEC
Q1 2023May 12, 20231,789$2.10BBABAAMDTSLAvs. Q4 2022SEC
Q4 2022Feb 9, 20231,874$2.96BCIMSFTAAPLvs. Q3 2022SEC
Q3 2022Nov 9, 20221,973$3.06BTSLAAAPLAMDvs. Q2 2022SEC
Q2 2022Aug 11, 20221,982$3.50BTSMMETAMSFTvs. Q1 2022SEC
Q1 2022May 12, 20222,010$4.58BNVDATSMJDvs. Q4 2021SEC
Q4 2021Feb 11, 20222,135$5.32BTSLAXLNXLRCXvs. Q3 2021SEC
Q3 2021Nov 12, 20212,042$4.59BCVNALITSMvs. Q2 2021SEC
Q2 2021Aug 10, 20211,963$5.22BTALGELIvs. Q1 2021SEC
Q1 2021May 12, 20211,825$4.57BAAPLBIDUGE–SEC

13D and 13G filings

Companies where Group One Trading, L.P. reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

1 company, largest stake first.

Companies where Group One Trading, L.P. owns 5% or more
CompanyLatest formStakeChangeFirst filedLatest filingFiling
QNCXQuince Therapeutics, Inc.13G10.70%5.94M sharesNewMar 5, 20261 filingMar 5, 2026SEC

Latest filings

13 filings on file made by Group One Trading, L.P. or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Group One Trading, L.P.
CompanyFiled (ET)FormStakeChangeEvent dateFiling
CATOCato CorpSep 8, 20265:21 PM ET13G/A1.40%280.8K shares−3.60 ppfrom 5.00%Below 5%Jun 30, 2026SEC
POETPoet Technologies Inc.Sep 8, 20265:11 PM ET13G/A0.70%1.26M shares−4.80 ppfrom 5.50%Below 5%Aug 31, 2026SEC
CATOCato CorpAug 13, 20265:58 PM ET13G5.00%1.00M sharesNewJun 30, 2026SEC
POETPoet Technologies Inc.Aug 13, 20265:45 PM ET13G5.50%9.45M sharesNewJun 30, 2026SEC
QNCXQuince Therapeutics, Inc.Mar 5, 20265:52 PM ET13G10.70%5.94M sharesNewFeb 28, 2026SEC
RILYBRC Group Holdings, Inc.May 14, 20255:10 PM ET13G2.80%852.8K shares−3.00 ppfrom 5.80%Below 5%Mar 31, 2025SEC
RILYBRC Group Holdings, Inc.Nov 14, 20244:28 PM ET13G5.80%1.76M sharesNewSep 30, 2024SEC
OLOXOlenox Industries Inc.May 12, 202313G/AOld format–––SEC
SICPSilvergate Capital CorpMar 6, 202313G/AOld format–––SEC
SICPSilvergate Capital CorpFeb 13, 202313GOld format–New–SEC
MSTRStrategy IncFeb 10, 202313G/AOld format–––SEC
MSTRStrategy IncJan 10, 202313GOld format–New–SEC
OLOXOlenox Industries Inc.Jun 3, 202213GOld format–New–SEC