Skip to content
Disclosery

GROUP ONE TRADING LLC: MCO position timeline

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

GROUP ONE TRADING LLC held 0 MCO shares at 2025-12-31 per its 13F-HR filed 2026-02-12.

the latest 13F is the newest step

  1. period ended2025-12-31
    13F 0 shares
    Change vs previous 13F -401 shares

    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).

    Exited: the 13F for this period no longer lists the position.

  2. period ended2025-09-30
    13F 401 shares
    Change vs previous 13F -237 shares

    0.01% of the 13F portfolio, value $191,068.

    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).

  3. period ended2025-06-30
    13F 638 shares
    Change vs previous 13F -661 shares

    0.01% of the 13F portfolio, value $320,014.

    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).

  4. period ended2025-03-31
    13F 1,299 shares
    Change vs previous 13F +1,086 shares

    0.03% of the 13F portfolio, value $604,931.

    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).

  5. period ended2024-12-31
    13F/A 213 shares
    Change vs previous 13F -1,395 shares

    <0.01% of the 13F portfolio, value $100,828.

    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).

  6. period ended2024-09-30
    13F 1,608 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $763,141.

    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).