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Disclosery

GROUP ONE TRADING LLC: Z position timeline

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

GROUP ONE TRADING LLC held 24,882 Z 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 24,882 shares
    Change vs previous 13F -1,258 shares

    0.02% of the 13F portfolio, value $784,281.

    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 26,140 shares
    Change vs previous 13F +18,808 shares

    0.04% of the 13F portfolio, value $1,081,673.

    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 7,332 shares
    Change vs previous 13F -11,288 shares

    0.01% of the 13F portfolio, value $500,189.

    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 18,620 shares
    Change vs previous 13F +11,198 shares

    0.04% of the 13F portfolio, value $1,434,671.

    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 7,422 shares
    Change vs previous 13F -1,334 shares

    0.02% of the 13F portfolio, value $519,911.

    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 8,756 shares
    Change vs previous 13F -17,422 shares

    0.03% of the 13F portfolio, value $600,311.

    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 26,178 shares
    Change vs previous 13F not available

    0.07% of the 13F portfolio, value $1,938,481.

    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).