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Disclosery

GROUP ONE TRADING LLC: M position timeline

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

GROUP ONE TRADING LLC held 44,874 M 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 44,874 shares
    Change vs previous 13F +13,631 shares

    0.03% of the 13F portfolio, value $1,056,783.

    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 31,243 shares
    Change vs previous 13F -81,694 shares

    0.02% of the 13F portfolio, value $565,186.

    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 112,937 shares
    Change vs previous 13F -74,767 shares

    0.07% of the 13F portfolio, value $2,490,261.

    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 187,704 shares
    Change vs previous 13F +75,670 shares

    0.1% of the 13F portfolio, value $3,365,533.

    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 112,034 shares
    Change vs previous 13F -3,484 shares

    0.04% of the 13F portfolio, value $1,306,316.

    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 115,518 shares
    Change vs previous 13F -94,674 shares

    0.06% of the 13F portfolio, value $1,450,906.

    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 210,192 shares
    Change vs previous 13F -70,764 shares

    0.12% of the 13F portfolio, value $3,558,551.

    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).

  8. period ended2024-09-30
    13F 280,956 shares
    Change vs previous 13F not available

    0.17% of the 13F portfolio, value $4,408,200.

    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).