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Disclosery

GROUP ONE TRADING LLC: LAB position timeline

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

GROUP ONE TRADING LLC held 376 LAB 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 376 shares
    Change vs previous 13F +162 shares

    <0.01% of the 13F portfolio, value $309.

    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 214 shares
    Change vs previous 13F -26,492 shares

    <0.01% of the 13F portfolio, value $197.

    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 26,706 shares
    Change vs previous 13F +6,221 shares

    <0.01% of the 13F portfolio, value $34,184.

    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 20,485 shares
    Change vs previous 13F +1,116 shares

    <0.01% of the 13F portfolio, value $26,630.

    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 19,369 shares
    Change vs previous 13F -6,875 shares

    <0.01% of the 13F portfolio, value $23,243.

    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 26,244 shares
    Change vs previous 13F +15,769 shares

    <0.01% of the 13F portfolio, value $28,344.

    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 10,475 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $18,331.

    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).