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Disclosery

Asset Management One Co., Ltd.: BIIB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Asset Management One Co., Ltd. on BIIB, newest first. How the timeline and the estimate are built.

Asset Management One Co., Ltd. held 64,120 BIIB shares at 2026-06-30 per its 13F-HR filed 2026-07-28.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 64,120 shares
    Change vs previous 13F +20 shares

    0.04% of the 13F portfolio, value $13,853,767.

    13F-HR 0001193125-26-318819 filed by Asset Management One Co., Ltd.
    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 64,100 shares
    Change vs previous 13F -3,353 shares

    0.03% of the 13F portfolio, value $11,751,453.

    13F-HR 0001193125-26-213217 filed by Asset Management One Co., Ltd.
    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 67,453 shares
    Change vs previous 13F -454 shares

    0.03% of the 13F portfolio, value $11,926,691.

    13F-HR 0001193125-26-023286 filed by Asset Management One Co., Ltd.
    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 67,907 shares
    Change vs previous 13F +5,097 shares

    0.03% of the 13F portfolio, value $9,512,413.

    13F-HR 0001193125-25-245770 filed by Asset Management One Co., Ltd.
    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 62,810 shares
    Change vs previous 13F +1,390 shares

    0.02% of the 13F portfolio, value $7,888,308.

    13F-HR 0000950123-25-006830 filed by Asset Management One Co., Ltd.
    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 61,420 shares
    Change vs previous 13F +3,194 shares

    0.03% of the 13F portfolio, value $8,404,713.

    13F-HR 0000950123-25-003633 filed by Asset Management One Co., Ltd.
    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 58,226 shares
    Change vs previous 13F +2,871 shares

    0.03% of the 13F portfolio, value $8,810,176.

    13F-HR 0000950123-25-000714 filed by Asset Management One Co., Ltd.
    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 55,355 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $10,730,013.

    13F-HR 0000950123-24-010027 filed by Asset Management One Co., Ltd.
    Filed (acceptance time not in the bulk data set), ingested

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