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Disclosery

MARSHALL WACE, LLP: BIIB position timeline

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

MARSHALL WACE, LLP held 12,595 BIIB shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 12,595 shares
    Change vs previous 13F -217,284 shares

    <0.01% of the 13F portfolio, value $2,721,275.

    13F-HR 0001318757-26-000010 filed by MARSHALL WACE, LLP
    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 229,879 shares
    Change vs previous 13F -156,049 shares

    0.05% of the 13F portfolio, value $42,143,719.

    13F-HR 0001318757-26-000005 filed by MARSHALL WACE, LLP
    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 385,928 shares
    Change vs previous 13F -501,733 shares

    0.07% of the 13F portfolio, value $67,919,469.

    13F-HR 0001318757-26-000003 filed by MARSHALL WACE, LLP
    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 887,661 shares
    Change vs previous 13F +721,706 shares

    0.14% of the 13F portfolio, value $124,343,553.

    13F-HR 0001318757-25-000046 filed by MARSHALL WACE, LLP
    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 165,955 shares
    Change vs previous 13F +160,055 shares

    0.02% of the 13F portfolio, value $20,842,288.

    13F-HR 0001318757-25-000034 filed by MARSHALL WACE, LLP
    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 5,900 shares
    Change vs previous 13F -74,052 shares

    <0.01% of the 13F portfolio, value $807,356.

    13F-HR 0001318757-25-000023 filed by MARSHALL WACE, LLP
    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 79,952 shares
    Change vs previous 13F +13,652 shares

    0.02% of the 13F portfolio, value $12,226,260.

    13F-HR 0002048047-25-000005 filed by MARSHALL WACE, LLP
    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 66,300 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $12,851,592.

    13F-HR 0001318757-24-000018 filed by MARSHALL WACE, LLP
    Filed (acceptance time not in the bulk data set), ingested

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