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Disclosery

STATE OF WISCONSIN INVESTMENT BOARD: BIIB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of STATE OF WISCONSIN INVESTMENT BOARD on BIIB, newest first. How the timeline and the estimate are built.

STATE OF WISCONSIN INVESTMENT BOARD held 78,231 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 78,231 shares
    Change vs previous 13F -333 shares

    0.03% of the 13F portfolio, value $16,902,590.

    13F-HR 0001062993-26-004375 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 78,564 shares
    Change vs previous 13F +2,620 shares

    0.03% of the 13F portfolio, value $14,403,138.

    13F-HR 0001062993-26-002676 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 75,944 shares
    Change vs previous 13F -1,955 shares

    0.03% of the 13F portfolio, value $13,365,385.

    13F-HR 0001062993-26-000957 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 77,899 shares
    Change vs previous 13F -869 shares

    0.03% of the 13F portfolio, value $10,912,092.

    13F-HR 0001062993-25-016783 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 78,768 shares
    Change vs previous 13F -9,808 shares

    0.02% of the 13F portfolio, value $9,892,473.

    13F-HR 0001062993-25-014368 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 88,576 shares
    Change vs previous 13F +8,435 shares

    0.03% of the 13F portfolio, value $12,120,740.

    13F-HR 0001062993-25-009484 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 80,141 shares
    Change vs previous 13F -12,825 shares

    0.03% of the 13F portfolio, value $12,255,162.

    13F-HR 0001062993-25-002462 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 92,966 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $18,020,529.

    13F-HR 0001062993-24-019058 filed by STATE OF WISCONSIN INVESTMENT BOARD
    Filed (acceptance time not in the bulk data set), ingested

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