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Disclosery

Janus Henderson: ATMU position timeline

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

Janus Henderson held 1,631,709 ATMU 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 1,631,709 shares
    Share basis changed not comparable

    Membership change: Jupiter Topco LLC joined the group. 0.03% of the 13F portfolio, value $83,249,295.

    13F-HR 0001085146-26-000611 filed by Jupiter Topco 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/A 1,551,117 shares
    Change vs previous 13F +181,792 shares

    0.04% of the 13F portfolio, value $88,103,810.

    13F-HR/A 0001085146-26-000420 filed by JANUS HENDERSON GROUP PLC
    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 1,369,325 shares
    Change vs previous 13F +476,429 shares

    0.03% of the 13F portfolio, value $71,070,016.

    13F-HR 0001085146-26-000226 filed by JANUS HENDERSON GROUP PLC
    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 892,896 shares
    Change vs previous 13F +98,280 shares

    0.02% of the 13F portfolio, value $40,268,068.

    13F-HR 0001085146-25-005993 filed by JANUS HENDERSON GROUP PLC
    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 794,616 shares
    Change vs previous 13F +320,248 shares

    0.01% of the 13F portfolio, value $28,945,799.

    13F-HR 0001085146-25-005104 filed by JANUS HENDERSON GROUP PLC
    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 474,368 shares
    Change vs previous 13F +122,428 shares

    0.01% of the 13F portfolio, value $17,801,289.

    13F-HR 0001085146-25-003208 filed by JANUS HENDERSON GROUP PLC
    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 351,940 shares
    Change vs previous 13F +262,199 shares

    0.01% of the 13F portfolio, value $13,796,048.

    13F-HR 0001085146-25-001531 filed by JANUS HENDERSON GROUP PLC
    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 89,741 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $3,365,736.

    13F-HR 0001085146-24-005765 filed by JANUS HENDERSON GROUP PLC
    Filed (acceptance time not in the bulk data set), ingested

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