GROUP ONE TRADING LLC

CIK 0000932540 · CHICAGO, IL · Quarter end: 2026-06-30 · Filed on: 2026-08-14 · Open the SEC source ↗

Portfolio Value (AUM)Total value of the fund's US stock portfolio reported to the SEC.

$71.08B

2026 Q2

Positions

7,824

Top-10 ConcentrationHow much of the portfolio sits in the 10 largest holdings. High = concentrated bets.

17.8%

Est. Net Flow (Q)

—

2026 Q2

Positions Changes Mix History BacktestPRO

Top Holdings

595112953PUT

MICRON TECHNOLOGY INC

3.4%

595112903CALL

MICRON TECHNOLOGY INC

2.8%

78463V907CALL

SPDR GOLD TR

1.9%

80004C950PUT

SANDISK CORP

1.8%

88160R901CALL

TESLA INC

1.7%

30303M902CALL

META PLATFORMS INC

1.4%

92189F956PUT

VANECK ETF TRUST

1.4%

594918904CALL

MICROSOFT CORP

1.3%

New / Increased

No prior quarter data

Reduced / Exited

No prior quarter data

Read the 2026-Q2 quarterly report · 13F Filing Calendar

13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.