GROUP ONE TRADING LLC

CIK 0000932540 · Q2 2026

13F Equity AUM

$71.1B

+36.2% QoQ

Positions

7,824

-6036 QoQ

AUM Rank

#560

Top 5%

Skill Alpha (FF)

+0.6%/yr^ns

No Clear Edge

Rank #1,867 · Top 23%

vs S&P -0.1%/yr (unadj.)

Quarters Tracked

~13 years

Portfolio Concentration

Top 5: 11.5%Top 10: 17.8%Top 20: 26.0%

MU3.4%

MU2.8%

GLD1.9%

SNDK1.8%

TSLA1.7%

META PLATFORMS INC1.4%

VANECK ETF TRUST1.4%

MSFT1.3%

SNDK1.2%

INTC1.0%

Others (5877)82.2%

HHI (Herfindahl-Hirschman Index) measures portfolio concentration. Low (<1500) = diversified, Moderate (1500-2500), High (>2500) = concentrated bets.

Sector Allocation

No sector data available.

Position Sizing

Positions: 5887Median: 0.00%Avg: 0.02%

0–0.5%

5861(70.6%)

0.5–1%

17(12.6%)

1–3%

8(13.4%)

3–5%

1(3.4%)

5%+

0(0.0%)

Count of positions per weight bucket — (%) = combined portfolio weight

Loading summary cards...

Portfolio Overlap

Shared: 0Unique: 5,887vs 20 funds

0%Low

5,887

Fund positions

Consensus CUSIPs

Jaccard similarity of this fund’s portfolio vs the consensus of top 20 funds by AUM. Low (<15%) = contrarian, Moderate (15-40%), High (>40%) = follows the crowd.

Loading overlap analysis...

Position Changes This Quarter

New0Increased0Decreased0Exited0

No position changes this quarter.

Quarter-over-quarter changes compared to prior 13F filing. New = first appearance; Exited = no longer held.

Loading position changes...

Holdings

Loading holdings...