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Disclosery

Kentucky Retirement Systems: BIIB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Kentucky Retirement Systems on BIIB, newest first. How the timeline and the estimate are built.

Kentucky Retirement Systems held 13,049 BIIB 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 13,049 shares
    Change vs previous 13F -10,297 shares

    0.05% of the 13F portfolio, value $2,819,367.

    13F-HR 0001537783-26-000003 filed by Kentucky Retirement Systems
    Filed (acceptance time not in the bulk data set), ingested

    • Kentucky Retirement Systems: 9,222 shares
    • Kentucky Retirement Systems Insurance Trust Fund: 3,827 shares

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

  2. period ended2026-03-31
    13F 23,346 shares
    Change vs previous 13F +10,331 shares

    0.22% of the 13F portfolio, value $6,160,721.

    13F-HR 0001537783-26-000002 filed by Kentucky Retirement Systems
    Filed (acceptance time not in the bulk data set), ingested

    • Kentucky Retirement Systems: 19,502 shares
    • Kentucky Retirement Systems Insurance Trust Fund: 3,844 shares

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

  3. period ended2025-12-31
    13F 13,015 shares
    Change vs previous 13F 0 shares

    0.04% of the 13F portfolio, value $2,290,510.

    13F-HR 0001537783-26-000001 filed by Kentucky Retirement Systems
    Filed (acceptance time not in the bulk data set), ingested

    • Kentucky Retirement Systems: 9,171 shares
    • Kentucky Retirement Systems Insurance Trust Fund: 3,844 shares

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

  4. period ended2025-09-30
    13F 13,015 shares
    Change vs previous 13F -279 shares

    0.04% of the 13F portfolio, value $1,823,142.

    13F-HR 0001537783-25-000008 filed by Kentucky Retirement Systems
    Filed (acceptance time not in the bulk data set), ingested

    • Kentucky Retirement Systems: 9,171 shares
    • Kentucky Retirement Systems Insurance Trust Fund: 3,844 shares

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

  5. period ended2025-06-30
    13F 13,294 shares
    Change vs previous 13F -887 shares

    0.03% of the 13F portfolio, value $1,669,593.

    13F-HR 0001537783-25-000006 filed by Kentucky Retirement Systems
    Filed (acceptance time not in the bulk data set), ingested

    • Kentucky Retirement Systems: 9,333 shares
    • Kentucky Retirement Systems Insurance Trust Fund: 3,961 shares

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

  6. period ended2025-03-31
    13F 14,181 shares
    Change vs previous 13F -4,194 shares

    0.04% of the 13F portfolio, value $1,940,528.

    13F-HR 0001537783-25-000003 filed by Kentucky Retirement Systems
    Filed (acceptance time not in the bulk data set), ingested

    • Kentucky Retirement Systems: 9,945 shares
    • Kentucky Retirement Systems Insurance Trust Fund: 4,236 shares

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

  7. period ended2024-12-31
    13F 18,375 shares
    Change vs previous 13F +3,914 shares

    0.1% of the 13F portfolio, value $3,870,729.

    13F-HR 0001537783-25-000002 filed by Kentucky Retirement Systems
    Filed (acceptance time not in the bulk data set), ingested

    • Kentucky Retirement Systems: 10,010 shares
    • Kentucky Retirement Systems Insurance Trust Fund: 8,365 shares

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

  8. period ended2024-09-30
    13F 14,461 shares
    Change vs previous 13F not available

    0.06% of the 13F portfolio, value $2,803,120.

    13F-HR 0001537783-24-000006 filed by Kentucky Retirement Systems
    Filed (acceptance time not in the bulk data set), ingested

    • Kentucky Retirement Systems: 10,148 shares
    • Kentucky Retirement Systems Insurance Trust Fund: 4,313 shares

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