Stocks/Funds/CIK 932540

GROUP ONE TRADING LLC

index-like (500+ pos)market makerlong-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 932540
Assets
$3.02B
+26.0% YoY
Holdings
2,161
Lifetime alpha vs market
-6.40% annual
Average hold time
2.9 yr
median 2.5 yr

Quarterly history

Cum return +17% vs S&P +52% · α -35% lifetimeAUM $3.0B · peak $5.3BFlow $-328M (-10%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-20.06%
trims when stocks drop
when a holding falls −10%+
Middle response
-25.08%
baseline attrition
Rally response
-25.37%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
URAGlobal X - Uranium ETF$85M2.8%1.5 yr
SILJAmplify Junior Silver Mi$72M2.4%1.3 yr
MUMicron Technology, Inc.$53M1.7%+289.6%9.0 yr
TSMTaiwan Semiconductor Man$47M1.5%+105.6%8.3 yr
AGFirst Majestic Silver Co$42M1.4%+221.6%9.3 yr
URNMSprott Uranium Miners ET$37M1.2%3.0 yr
MARMarriott International, $35M1.1%+38.6%9.3 yr
PBRPetróleo Brasileiro S.A$33M1.1%+54.2%1.5 yr
EWYiShares MSCI South Korea$31M1.0%1.0 yr
KKRKKR & Co. Inc.$31M1.0%-19.5%3.0 yr
CYTKCytokinetics, Incorporat$24M0.8%+64.0%7.3 yr
COPXGlobal X - Copper Miners$23M0.8%1.3 yr
CDECoeur Mining, Inc.$23M0.8%+217.1%9.0 yr
KWEBKraneShares CSI China In$22M0.7%1.8 yr
EWZiShares MSCI Brazil ETF$22M0.7%0.8 yr

Portfolio composition (YoY)

Industry mix
Asset Management15.7%+8.5pp$474M
Semiconductors6.3%-2.2pp$190M
Biotechnology4.3%-0.5pp$131M
Asset Management - Global4.3%+3.6pp$130M
Financial - Capital Markets2.9%-3.2pp$88M
Software - Infrastructure2.6%+0.2pp$80M
Silver2.5%+2.1pp$77M
Gold2.5%+0.4pp$76M
Unknown2.3%-0.5pp$70M
Medical - Healthcare Plans1.9%-1.3pp$57M
Country
US79.8%+6.7pp
CA6.0%+3.2pp
Unknown2.3%-0.5pp
TW1.6%+0.9pp
BR1.6%+0.7pp
CN1.5%-2.1pp
SG0.7%-0.1pp
AU0.7%-1.3pp
Top 5: 9.8% · Top 10: 15.3% · Top 25: 25.5%

Winners

TickerPrev $PnLYoY %
IREN$46M+0.21B462.9%
MU$29M+0.08B289.6%
INTC$26M+0.02B94.3%
TSM$16M+0.02B105.6%
AG$6M+0.01B221.6%

Losers

TickerPrev $PnLYoY %
CNC$1M-0.00B-46.1%
KKR$3M-0.00B-19.5%

Top buys this quarter · 15

TSM Taiwan Semiconductor Manufactu+$40M
MU Micron Technology, Inc.+$32M
KKR KKR & Co. Inc.+$30M
VST Vistra Corp.+$19M
GS The Goldman Sachs Group, Inc.+$14M
BX Blackstone Inc.+$14M
QCOM QUALCOMM Incorporated+$13M
CDE Coeur Mining, Inc.+$12M
VFC V.F. Corporation+$12M
PFE Pfizer Inc.+$12M

Top sells this quarter · 15

WBD Warner Bros. Discovery, Inc.$37M
AMD Advanced Micro Devices, Inc.exit$31M
SATS EchoStar Corporation$29M
TIGR UP Fintech Holding Ltd. Sponso$26M
CAR Avis Budget Group, Inc.$24M
ASTS AST SpaceMobile, Inc.$22M
SNDK Sandisk Corporationexit$21M
IREN IREN Limited$21M
MMM 3M Company$20M
WDC Western Digital Corporationexit$19M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$3.02B2161+48.41%+17.59%+30.82%-0.33B
2025-12-31$3.37B2288+37.01%+17.72%+19.29%-0.06B
2025-09-30$3.34B2236+48.39%+17.52%+30.87%-0.36B
2025-06-30$3.05B1996+18.82%+14.94%+3.88%+0.18B
2025-03-31$2.40B1912-0.54%+8.30%-8.85%-0.30B
2024-12-31$2.94B1986+4.09%+24.89%-20.79%+0.13B
2024-09-30$2.52B1672+1.58%+36.04%-34.46%-0.57B
2024-06-30$3.17B1700+4.47%+24.49%-20.02%+0.36B
2024-03-31$2.81B1713+16.42%+29.62%-13.21%-0.24B
2023-12-31$3.18B1830+29.35%+26.18%+3.17%+0.44B
2023-09-30$2.52B1875+13.79%+21.57%-7.78%+0.18B
2023-06-30$2.34B1744+3.14%+19.42%-16.29%-0.01B
2023-03-31$2.10B1786-32.03%-7.82%-24.21%-1.05B
2022-12-31$2.96B1867-4.34%+7.56%-11.90%+0.03B
2022-09-30$3.06B1893-9.43%-4.93%-4.51%-0.11B
2022-06-30$3.50B1917-26.45%-16.11%-10.34%+0.13B