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Disclosery

GROUP ONE TRADING LLC: OSCR position timeline

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

GROUP ONE TRADING LLC held 1,148,112 OSCR 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 1,148,112 shares
    Change vs previous 13F -109,665 shares

    0.94% of the 13F portfolio, value $32,744,154.

    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 1,257,777 shares
    Change vs previous 13F +584,117 shares

    0.48% of the 13F portfolio, value $14,426,702.

    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 673,660 shares
    Change vs previous 13F +16,583 shares

    0.29% of the 13F portfolio, value $9,680,494.

    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 657,077 shares
    Change vs previous 13F +375,662 shares

    0.37% of the 13F portfolio, value $12,438,468.

    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 281,415 shares
    Change vs previous 13F +177,470 shares

    0.2% of the 13F portfolio, value $6,033,538.

    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 103,945 shares
    Change vs previous 13F +21,589 shares

    0.06% of the 13F portfolio, value $1,362,719.

    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 82,356 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $1,106,865.

    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).