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Disclosery

GROUP ONE TRADING LLC: C position timeline

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

GROUP ONE TRADING LLC held 11,366 C 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 11,366 shares
    Change vs previous 13F -82,009 shares

    0.05% of the 13F portfolio, value $1,590,785.

    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 93,375 shares
    Change vs previous 13F +16,057 shares

    0.35% of the 13F portfolio, value $10,589,659.

    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 77,318 shares
    Change vs previous 13F -126,602 shares

    0.27% of the 13F portfolio, value $9,022,237.

    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 203,920 shares
    Change vs previous 13F -390,511 shares

    0.62% of the 13F portfolio, value $20,697,880.

    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 594,431 shares
    Change vs previous 13F +286,624 shares

    1.66% of the 13F portfolio, value $50,597,967.

    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 307,807 shares
    Change vs previous 13F +173,753 shares

    0.91% of the 13F portfolio, value $21,851,219.

    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 134,054 shares
    Change vs previous 13F -560,808 shares

    0.32% of the 13F portfolio, value $9,436,061.

    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 694,862 shares
    Change vs previous 13F not available

    1.72% of the 13F portfolio, value $43,498,361.

    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).