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Disclosery

Janus Henderson: BSX position timeline

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

Janus Henderson held 18,822,853 BSX 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 18,822,853 shares
    Share basis changed not comparable

    Membership change: Jupiter Topco LLC joined the group. 0.33% of the 13F portfolio, value $803,357,488.

    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 16,497,366 shares
    Change vs previous 13F +3,907,981 shares

    0.49% of the 13F portfolio, value $1,035,201,522.

    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 12,589,385 shares
    Change vs previous 13F +617,515 shares

    0.54% of the 13F portfolio, value $1,200,403,908.

    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 11,971,870 shares
    Change vs previous 13F -185,845 shares

    0.53% of the 13F portfolio, value $1,168,810,184.

    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 12,157,715 shares
    Change vs previous 13F -1,832,206 shares

    0.64% of the 13F portfolio, value $1,305,847,173.

    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 13,989,921 shares
    Change vs previous 13F -987,895 shares

    0.76% of the 13F portfolio, value $1,390,033,883.

    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 14,977,816 shares
    Change vs previous 13F -767,295 shares

    0.68% of the 13F portfolio, value $1,337,828,170.

    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 15,745,111 shares
    Change vs previous 13F not available

    0.68% of the 13F portfolio, value $1,319,436,616.

    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).