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Disclosery

GROUP ONE TRADING LLC: YMAX position timeline

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

GROUP ONE TRADING LLC held 52,124 YMAX 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 52,124 shares
    Change vs previous 13F +18,242 shares

    0.01% of the 13F portfolio, value $421,162.

    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 33,882 shares
    Change vs previous 13F -56,513 shares

    0.01% of the 13F portfolio, value $265,296.

    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 90,395 shares
    Change vs previous 13F -11,969 shares

    0.03% of the 13F portfolio, value $902,142.

    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 102,364 shares
    Change vs previous 13F +22,817 shares

    0.04% of the 13F portfolio, value $1,311,283.

    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 79,547 shares
    Change vs previous 13F +30,132 shares

    0.04% of the 13F portfolio, value $1,094,567.

    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 49,415 shares
    Change vs previous 13F +19,855 shares

    0.03% of the 13F portfolio, value $660,184.

    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 29,560 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $501,042.

    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).