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Disclosery

Janus Henderson: STN position timeline

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

Janus Henderson held 881,814 STN 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 881,814 shares
    Share basis changed not comparable

    Membership change: Jupiter Topco LLC joined the group. 0.02% of the 13F portfolio, value $60,761,806.

    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 903,925 shares
    Change vs previous 13F -2,547 shares

    0.04% of the 13F portfolio, value $77,331,856.

    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 906,472 shares
    Change vs previous 13F +20,274 shares

    0.04% of the 13F portfolio, value $86,415,952.

    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 886,198 shares
    Change vs previous 13F -4,777 shares

    0.04% of the 13F portfolio, value $95,251,286.

    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 890,975 shares
    Change vs previous 13F -41,655 shares

    0.05% of the 13F portfolio, value $97,540,413.

    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 932,630 shares
    Change vs previous 13F +223,524 shares

    0.04% of the 13F portfolio, value $77,224,522.

    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 709,106 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $56,191,031.

    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).