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Disclosery

GROUP ONE TRADING LLC: OTLK position timeline

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

GROUP ONE TRADING LLC held 246,428 OTLK 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 246,428 shares
    Change vs previous 13F +132,727 shares

    0.01% of the 13F portfolio, value $391,821.

    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 113,701 shares
    Change vs previous 13F +76,704 shares

    <0.01% of the 13F portfolio, value $23,400.

    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 36,997 shares
    Change vs previous 13F +20,164 shares

    <0.01% of the 13F portfolio, value $58,455.

    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 16,833 shares
    Change vs previous 13F -10,471 shares

    <0.01% of the 13F portfolio, value $17,843.

    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 27,304 shares
    Change vs previous 13F +21,075 shares

    <0.01% of the 13F portfolio, value $43,686.

    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 6,229 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $7,599.

    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).