Skip to content
Disclosery

Janus Henderson: MAMA position timeline

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

Janus Henderson held 1,337,813 MAMA 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 1,337,813 shares
    Share basis changed not comparable

    Membership change: Jupiter Topco LLC joined the group. 0.01% of the 13F portfolio, value $23,879,962.

    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 1,297,538 shares
    Change vs previous 13F -30,582 shares

    0.01% of the 13F portfolio, value $19,904,233.

    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 1,328,120 shares
    Change vs previous 13F -56,186 shares

    0.01% of the 13F portfolio, value $17,916,339.

    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 1,384,306 shares
    Change vs previous 13F -32,650 shares

    0.01% of the 13F portfolio, value $14,549,056.

    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 1,416,956 shares
    Change vs previous 13F -13,860 shares

    0.01% of the 13F portfolio, value $11,760,735.

    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 1,430,816 shares
    Change vs previous 13F -13,580 shares

    <0.01% of the 13F portfolio, value $9,071,373.

    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 1,444,396 shares
    Change vs previous 13F +1,412,884 shares

    0.01% of the 13F portfolio, value $11,497,392.

    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 31,512 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $230,038.

    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).