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Disclosery

GROUP ONE TRADING LLC: SIGA position timeline

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

GROUP ONE TRADING LLC held 832 SIGA 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 832 shares
    Change vs previous 13F -2,348 shares

    <0.01% of the 13F portfolio, value $3,028.

    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 3,180 shares
    Change vs previous 13F -415 shares

    <0.01% of the 13F portfolio, value $17,013.

    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 3,595 shares
    Change vs previous 13F +600 shares

    <0.01% of the 13F portfolio, value $21,965.

    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 2,995 shares
    Change vs previous 13F +703 shares

    <0.01% of the 13F portfolio, value $27,404.

    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 2,292 shares
    Change vs previous 13F +2,292 shares

    <0.01% of the 13F portfolio, value $14,944.

    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 0 shares
    Change vs previous 13F -35,827 shares

    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).

    Exited: the 13F for this period no longer lists the position.

  7. period ended2024-12-31
    13F/A 35,827 shares
    Change vs previous 13F +23,380 shares

    0.01% of the 13F portfolio, value $215,320.

    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 12,447 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $84,017.

    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).