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Disclosery

GROUP ONE TRADING LLC: ARDX position timeline

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

GROUP ONE TRADING LLC held 105,903 ARDX 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 105,903 shares
    Change vs previous 13F -14,424 shares

    0.02% of the 13F portfolio, value $540,105.

    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 120,327 shares
    Change vs previous 13F -33,484 shares

    0.02% of the 13F portfolio, value $720,759.

    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 153,811 shares
    Change vs previous 13F +60,540 shares

    0.03% of the 13F portfolio, value $896,718.

    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 93,271 shares
    Change vs previous 13F -195,690 shares

    0.02% of the 13F portfolio, value $513,923.

    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 288,961 shares
    Change vs previous 13F -60,723 shares

    0.04% of the 13F portfolio, value $1,132,727.

    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 349,684 shares
    Change vs previous 13F -95,093 shares

    0.07% of the 13F portfolio, value $1,716,948.

    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 444,777 shares
    Change vs previous 13F -161,920 shares

    0.08% of the 13F portfolio, value $2,255,019.

    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 606,697 shares
    Change vs previous 13F not available

    0.17% of the 13F portfolio, value $4,180,142.

    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).