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Disclosery

GROUP ONE TRADING LLC: GCT position timeline

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

GROUP ONE TRADING LLC held 103,826 GCT 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 103,826 shares
    Change vs previous 13F +4,369 shares

    0.09% of the 13F portfolio, value $3,280,902.

    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 99,457 shares
    Change vs previous 13F -55,566 shares

    0.15% of the 13F portfolio, value $4,513,359.

    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 155,023 shares
    Change vs previous 13F +19,540 shares

    0.18% of the 13F portfolio, value $6,089,303.

    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 135,483 shares
    Change vs previous 13F +46,042 shares

    0.12% of the 13F portfolio, value $3,847,717.

    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 89,441 shares
    Change vs previous 13F +58,146 shares

    0.06% of the 13F portfolio, value $1,769,143.

    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 31,295 shares
    Change vs previous 13F -11,694 shares

    0.02% of the 13F portfolio, value $444,389.

    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 42,989 shares
    Change vs previous 13F -107,841 shares

    0.03% of the 13F portfolio, value $796,156.

    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 150,830 shares
    Change vs previous 13F not available

    0.14% of the 13F portfolio, value $3,466,073.

    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).