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Disclosery

GROUP ONE TRADING LLC: ET position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of GROUP ONE TRADING LLC on ET, newest first. How the timeline and the estimate are built.

GROUP ONE TRADING LLC held 840,158 ET shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 840,158 shares
    Change vs previous 13F -108,804 shares

    0.46% of the 13F portfolio, value $16,063,821.

    13F-HR 0000932540-26-000011 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 948,962 shares
    Change vs previous 13F -417,240 shares

    0.6% of the 13F portfolio, value $18,314,967.

    13F-HR 0000932540-26-000005 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 1,366,202 shares
    Change vs previous 13F +609,593 shares

    0.67% of the 13F portfolio, value $22,528,671.

    13F-HR 0000932540-26-000002 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 756,609 shares
    Change vs previous 13F -901,151 shares

    0.39% of the 13F portfolio, value $12,983,410.

    13F-HR 0000932540-25-000040 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 1,657,760 shares
    Change vs previous 13F +851,784 shares

    0.98% of the 13F portfolio, value $30,055,189.

    13F-HR 0000932540-25-000034 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 805,976 shares
    Change vs previous 13F +805,976 shares

    0.62% of the 13F portfolio, value $14,983,094.

    13F-HR 0000932540-25-000027 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F/A 0 shares
    Change vs previous 13F -69,144 shares

    13F-HR/A 0000932540-25-000028 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

    Exited: the 13F for this period no longer lists the position.

  8. period ended2024-09-30
    13F 69,144 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $1,109,761.

    13F-HR 0000932540-24-000015 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).