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Disclosery

Janus Henderson: MIRM position timeline

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

Janus Henderson held 5,909,184 MIRM 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 5,909,184 shares
    Share basis changed not comparable

    Membership change: Jupiter Topco LLC joined the group. 0.28% of the 13F portfolio, value $691,671,568.

    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 6,945,813 shares
    Change vs previous 13F +880,505 shares

    0.31% of the 13F portfolio, value $641,764,403.

    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 6,065,308 shares
    Change vs previous 13F +1,067,722 shares

    0.21% of the 13F portfolio, value $479,050,121.

    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 4,997,586 shares
    Change vs previous 13F -238,691 shares

    0.17% of the 13F portfolio, value $366,518,621.

    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 5,236,277 shares
    Change vs previous 13F +470,168 shares

    0.13% of the 13F portfolio, value $266,484,636.

    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 4,766,109 shares
    Change vs previous 13F +184,467 shares

    0.12% of the 13F portfolio, value $219,247,167.

    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 4,581,642 shares
    Change vs previous 13F +101,358 shares

    0.1% of the 13F portfolio, value $189,481,486.

    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 4,480,284 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $174,737,642.

    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).