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Disclosery

GROUP ONE TRADING LLC: GSM position timeline

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

GROUP ONE TRADING LLC held 7,312 GSM 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 7,312 shares
    Change vs previous 13F +7,312 shares

    <0.01% of the 13F portfolio, value $23,252.

    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 0 shares
    Change vs previous 13F -40,971 shares

    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).

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

  3. period ended2025-12-31
    13F 40,971 shares
    Change vs previous 13F -116,802 shares

    0.01% of the 13F portfolio, value $190,105.

    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 157,773 shares
    Change vs previous 13F +157,773 shares

    0.02% of the 13F portfolio, value $717,867.

    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 0 shares
    Change vs previous 13F -29,803 shares

    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).

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

  6. period ended2025-03-31
    13F 29,803 shares
    Change vs previous 13F -47,246 shares

    <0.01% of the 13F portfolio, value $110,569.

    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 77,049 shares
    Change vs previous 13F +44,697 shares

    0.01% of the 13F portfolio, value $292,786.

    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 32,352 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $150,113.

    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).