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Disclosery

GROUP ONE TRADING LLC: ZETA position timeline

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

GROUP ONE TRADING LLC held 345,741 ZETA 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 345,741 shares
    Change vs previous 13F -11,391 shares

    0.2% of the 13F portfolio, value $6,804,183.

    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 357,132 shares
    Change vs previous 13F -84,567 shares

    0.19% of the 13F portfolio, value $5,685,541.

    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 441,699 shares
    Change vs previous 13F -20,782 shares

    0.27% of the 13F portfolio, value $8,988,575.

    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 462,481 shares
    Change vs previous 13F +304,679 shares

    0.27% of the 13F portfolio, value $9,189,497.

    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 157,802 shares
    Change vs previous 13F +74,041 shares

    0.08% of the 13F portfolio, value $2,444,353.

    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 83,761 shares
    Change vs previous 13F -199,752 shares

    0.05% of the 13F portfolio, value $1,135,799.

    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 283,513 shares
    Change vs previous 13F +252,546 shares

    0.17% of the 13F portfolio, value $5,100,399.

    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 30,967 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $923,746.

    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).