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Disclosery

GROUP ONE TRADING LLC: CLF position timeline

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

GROUP ONE TRADING LLC held 398,087 CLF 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 398,087 shares
    Change vs previous 13F +77,778 shares

    0.11% of the 13F portfolio, value $3,738,037.

    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 320,309 shares
    Change vs previous 13F -341,772 shares

    0.09% of the 13F portfolio, value $2,706,611.

    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 662,081 shares
    Change vs previous 13F +24,948 shares

    0.26% of the 13F portfolio, value $8,792,436.

    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 637,133 shares
    Change vs previous 13F +104,139 shares

    0.23% of the 13F portfolio, value $7,773,023.

    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 532,994 shares
    Change vs previous 13F -140,358 shares

    0.13% of the 13F portfolio, value $4,050,754.

    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 673,352 shares
    Change vs previous 13F +257,680 shares

    0.23% of the 13F portfolio, value $5,534,953.

    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 415,672 shares
    Change vs previous 13F +91,303 shares

    0.13% of the 13F portfolio, value $3,907,317.

    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 324,369 shares
    Change vs previous 13F not available

    0.16% of the 13F portfolio, value $4,142,192.

    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).