GROUP ONE TRADING LLC

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

GROUP ONE TRADING LLC reported 7,824 positions worth $71.08B as of June 30, 2026 (13F filed August 14, 2026). Largest holding: MICRON TECHNOLOGY INC (3.4%).

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
10 / 7824 positions shown
#SymbolCompanyTypeValue% Port.Shares1YYTD
1595112953MICRON TECHNOLOGY INCPUT$2.39B3.36%2,067,900
2595112903MICRON TECHNOLOGY INCCALL$1.98B2.78%1,713,300
378463V907SPDR GOLD TRCALL$1.37B1.92%3,706,400
480004C950SANDISK CORPPUT$1.26B1.77%552,500
588160R901TESLA INCCALL$1.18B1.66%2,807,700
630303M902META PLATFORMS INCCALL$1.03B1.45%1,825,000
792189F956VANECK ETF TRUSTPUT$1.01B1.42%3,035,200
8594918904MICROSOFT CORPCALL$892.0M1.25%2,391,200
980004C900SANDISK CORPCALL$847.0M1.19%372,500
10458140900INTEL CORPCALL$697.3M0.98%4,994,200

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

Frequently Asked Questions

What stocks does GROUP ONE TRADING LLC hold as of Q2 2026?

GROUP ONE TRADING LLC reported 7824 positions worth $71.08B in its Q2 2026 13F filing. Largest positions: MICRON TECHNOLOGY INC (3.4%), MICRON TECHNOLOGY INC (2.8%), SPDR GOLD TR (1.9%), SANDISK CORP (1.8%) and TESLA INC (1.7%).

What did GROUP ONE TRADING LLC buy in Q2 2026?

No previous quarter is available yet; the comparison appears with the next filing.

What did GROUP ONE TRADING LLC sell in Q2 2026?

No previous quarter is available yet.

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.