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

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

Sompo Asset Management Co., Ltd. held 8,596 BIIB shares at 2026-06-30 per its 13F-HR filed 2026-07-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 8,596 shares
    Change vs previous 13F -180 shares

    0.3% of the 13F portfolio, value $1,857,251.

    13F-HR 0001172661-26-002607 filed by Sompo Asset Management 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 8,776 shares
    Change vs previous 13F +1,200 shares

    0.3% of the 13F portfolio, value $1,608,904.

    13F-HR 0001172661-26-001575 filed by Sompo Asset Management 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 7,576 shares
    Change vs previous 13F +4,336 shares

    0.23% of the 13F portfolio, value $1,333,300.

    13F-HR 0001172661-26-000726 filed by Sompo Asset Management 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 3,240 shares
    Change vs previous 13F +3,240 shares

    0.08% of the 13F portfolio, value $453,859.

    13F-HR 0001172661-25-004878 filed by Sompo Asset Management 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 ended2024-12-31
    13F 0 shares
    Change vs previous 13F -1,200 shares

    13F-HR 0001172661-25-000947 filed by Sompo Asset Management Co., Ltd.
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  6. period ended2024-09-30
    13F 1,200 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $232,608.

    13F-HR 0001172661-24-004585 filed by Sompo Asset Management Co., Ltd.
    Filed (acceptance time not in the bulk data set), ingested

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