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Disclosery

GROUP ONE TRADING LLC: CI position timeline

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

GROUP ONE TRADING LLC held 91,369 CI 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 91,369 shares
    Change vs previous 13F +51,769 shares

    0.73% of the 13F portfolio, value $25,188,606.

    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 39,600 shares
    Change vs previous 13F +15,980 shares

    0.35% of the 13F portfolio, value $10,563,300.

    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 23,620 shares
    Change vs previous 13F +10,870 shares

    0.19% of the 13F portfolio, value $6,500,933.

    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 12,750 shares
    Change vs previous 13F +4,954 shares

    0.11% of the 13F portfolio, value $3,675,188.

    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 7,796 shares
    Change vs previous 13F -48,881 shares

    0.08% of the 13F portfolio, value $2,577,202.

    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 56,677 shares
    Change vs previous 13F -11,631 shares

    0.78% of the 13F portfolio, value $18,646,733.

    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 68,308 shares
    Change vs previous 13F +43,804 shares

    0.64% of the 13F portfolio, value $18,862,571.

    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 24,504 shares
    Change vs previous 13F not available

    0.34% of the 13F portfolio, value $8,489,166.

    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).