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Ionic Capital Management LLC: ATMU position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Ionic Capital Management LLC on ATMU, newest first. How the timeline and the estimate are built.

Ionic Capital Management LLC held 0 ATMU shares at 2026-03-31 per its 13F-HR filed 2026-05-15.

the latest 13F is the newest step

  1. period ended2026-03-31
    13F 0 shares
    Change vs previous 13F -60,003 shares

    13F-HR 0000929638-26-001894 filed by Ionic Capital Management 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 ended2025-12-31
    13F 60,003 shares
    Change vs previous 13F -8,352 shares

    3.08% of the 13F portfolio, value $3,114,756.

    13F-HR 0000929638-26-000662 filed by Ionic Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-09-30
    13F 68,355 shares
    Change vs previous 13F -7,000 shares

    3.43% of the 13F portfolio, value $3,082,127.

    13F-HR 0000929638-25-004285 filed by Ionic Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-06-30
    13F 75,355 shares
    Change vs previous 13F 0 shares

    3.08% of the 13F portfolio, value $2,744,429.

    13F-HR 0000929638-25-003039 filed by Ionic Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-03-31
    13F 75,355 shares
    Change vs previous 13F -13,801 shares

    3.15% of the 13F portfolio, value $2,767,789.

    13F-HR 0000929638-25-001896 filed by Ionic Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2024-12-31
    13F 89,156 shares
    Change vs previous 13F -21,562 shares

    3.44% of the 13F portfolio, value $3,493,132.

    13F-HR 0000929638-25-000778 filed by Ionic Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-09-30
    13F 110,718 shares
    Change vs previous 13F not available

    2.51% of the 13F portfolio, value $4,155,247.

    13F-HR 0000929638-24-003887 filed by Ionic Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).