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Disclosery

GROUP ONE TRADING LLC: STLA position timeline

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

GROUP ONE TRADING LLC held 247,514 STLA 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 247,514 shares
    Change vs previous 13F -359,408 shares

    0.04% of the 13F portfolio, value $1,420,730.

    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 606,922 shares
    Change vs previous 13F -181,934 shares

    0.14% of the 13F portfolio, value $4,303,077.

    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 788,856 shares
    Change vs previous 13F -125,871 shares

    0.25% of the 13F portfolio, value $8,590,642.

    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 914,727 shares
    Change vs previous 13F +136,543 shares

    0.26% of the 13F portfolio, value $8,543,550.

    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 778,184 shares
    Change vs previous 13F +133,153 shares

    0.26% of the 13F portfolio, value $7,805,186.

    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 645,031 shares
    Change vs previous 13F +119,674 shares

    0.3% of the 13F portfolio, value $7,230,798.

    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 525,357 shares
    Change vs previous 13F +312,927 shares

    0.23% of the 13F portfolio, value $6,855,909.

    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 212,430 shares
    Change vs previous 13F not available

    0.12% of the 13F portfolio, value $2,984,642.

    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).