GROUP ONE TRADING LLC

Q2 2026 13F-HR Holdings

Location
Chicago, IL
Holdings as of
6/30/2026
Date filed
8/13/2026
Form type
13F-HR
Num holdings
8,023
Total value ($000)
$71,081,489
Net value change ($000)
+18,902,515 (36.2%)
New positions
643
Sold out positions
652
Turnover %
33.0%
Sector allocation + QoQ delta (equities-only)
Prev filing: 5/13/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q1 2026
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
ROUNDHILL ETF TRUST 108,595 NEW
MRVL 50,970 1079.4%
UNH 45,907 653.5%
TSM 45,625 97.8%
BKNG 34,174 NEW
MU 31,580 60.0%
FCEL 24,744 7453.0%
DASH 22,869 NEW
NVDA 21,865 NEW
VSH 21,822 NEW
Top Reduces (Value $000, Stocks/ETFs)
SILJ -67,548 -93.9%
PBR -24,459 -74.6%
CYTK -23,991 -100.0%
EWY -23,484 -75.8%
AG -19,294 -46.4%
CNC -19,109 -100.0%
FLG -18,320 -100.0%
CDE -17,839 -77.9%
VST -15,975 -79.3%
EWZ -15,969 -72.7%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 67,612,895 (95.1% of total reported value)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type