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Disclosery

GROUP ONE TRADING LLC: DUOL position timeline

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

GROUP ONE TRADING LLC held 24,448 DUOL 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 24,448 shares
    Change vs previous 13F +7,729 shares

    0.08% of the 13F portfolio, value $2,812,009.

    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 16,719 shares
    Change vs previous 13F +8,264 shares

    0.05% of the 13F portfolio, value $1,647,992.

    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 8,455 shares
    Change vs previous 13F -2,244 shares

    0.04% of the 13F portfolio, value $1,483,852.

    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 10,699 shares
    Change vs previous 13F +6,921 shares

    0.1% of the 13F portfolio, value $3,443,366.

    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 3,778 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $1,549,056.

    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).