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Disclosery

GROUP ONE TRADING LLC: SWK position timeline

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

GROUP ONE TRADING LLC held 17,877 SWK 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 17,877 shares
    Change vs previous 13F +3,222 shares

    0.05% of the 13F portfolio, value $1,682,583.

    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 14,655 shares
    Change vs previous 13F -30,854 shares

    0.03% of the 13F portfolio, value $1,041,384.

    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 45,509 shares
    Change vs previous 13F -28,985 shares

    0.1% of the 13F portfolio, value $3,380,409.

    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 74,494 shares
    Change vs previous 13F +26,015 shares

    0.17% of the 13F portfolio, value $5,537,139.

    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 48,479 shares
    Change vs previous 13F +40,284 shares

    0.11% of the 13F portfolio, value $3,284,452.

    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 8,195 shares
    Change vs previous 13F -12,906 shares

    0.03% of the 13F portfolio, value $630,032.

    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 21,101 shares
    Change vs previous 13F not available

    0.06% of the 13F portfolio, value $1,694,199.

    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).