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Russell Investments Group, Ltd.: BIIB position timeline

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

Russell Investments Group, Ltd. held 133,894 BIIB shares at 2026-06-30 per its 13F-HR filed 2026-08-06.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 133,894 shares
    Change vs previous 13F -1,947 shares

    0.03% of the 13F portfolio, value $28,955,262.

    13F-HR 0001193125-26-336961 filed by Russell Investments Group, 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 135,841 shares
    Change vs previous 13F +16,754 shares

    0.03% of the 13F portfolio, value $25,078,396.

    13F-HR 0001193125-26-213225 filed by Russell Investments Group, 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 119,087 shares
    Change vs previous 13F -22,261 shares

    0.02% of the 13F portfolio, value $20,969,704.

    13F-HR 0001193125-26-053181 filed by Russell Investments Group, 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 141,348 shares
    Change vs previous 13F -100,705 shares

    0.02% of the 13F portfolio, value $19,773,710.

    13F-HR 0001193125-25-278803 filed by Russell Investments Group, 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 242,053 shares
    Change vs previous 13F +34,404 shares

    0.04% of the 13F portfolio, value $30,406,579.

    13F-HR 0000950123-25-007728 filed by Russell Investments Group, 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 207,649 shares
    Change vs previous 13F +85,886 shares

    0.04% of the 13F portfolio, value $28,437,710.

    13F-HR 0000950123-25-004729 filed by Russell Investments Group, 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 121,763 shares
    Change vs previous 13F -9,687 shares

    0.03% of the 13F portfolio, value $18,595,996.

    13F-HR 0000950123-25-001908 filed by Russell Investments Group, 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 131,450 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $25,487,643.

    13F-HR 0000950123-24-011064 filed by Russell Investments Group, Ltd.
    Filed (acceptance time not in the bulk data set), ingested

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