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Disclosery

GROUP ONE TRADING LLC: MFA position timeline

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

GROUP ONE TRADING LLC held 1,453 MFA 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 1,453 shares
    Change vs previous 13F +954 shares

    <0.01% of the 13F portfolio, value $14,080.

    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 499 shares
    Change vs previous 13F -100,216 shares

    <0.01% of the 13F portfolio, value $4,780.

    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 100,715 shares
    Change vs previous 13F +2,540 shares

    0.03% of the 13F portfolio, value $937,657.

    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 98,175 shares
    Change vs previous 13F -3,438 shares

    0.03% of the 13F portfolio, value $902,228.

    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 101,613 shares
    Change vs previous 13F +61,905 shares

    0.03% of the 13F portfolio, value $961,259.

    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 39,708 shares
    Change vs previous 13F +12,341 shares

    0.02% of the 13F portfolio, value $407,404.

    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 27,367 shares
    Change vs previous 13F -1,418 shares

    0.01% of the 13F portfolio, value $278,870.

    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 28,785 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $366,145.

    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).