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WELLINGTON MANAGEMENT GROUP LLP: BIIB position timeline

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

WELLINGTON MANAGEMENT GROUP LLP held 3,117,469 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 3,117,469 shares
    Change vs previous 13F +155,828 shares

    0.12% of the 13F portfolio, value $673,560,352.

    13F-HR 0000902219-26-000311 filed by WELLINGTON MANAGEMENT GROUP 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 2,961,641 shares
    Change vs previous 13F -589,628 shares

    0.1% of the 13F portfolio, value $542,957,645.

    13F-HR 0000902219-26-000209 filed by WELLINGTON MANAGEMENT GROUP 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 3,551,269 shares
    Change vs previous 13F -695,235 shares

    0.11% of the 13F portfolio, value $624,987,832.

    13F-HR 0000902219-26-000103 filed by WELLINGTON MANAGEMENT GROUP 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 4,246,504 shares
    Change vs previous 13F -551,916 shares

    0.1% of the 13F portfolio, value $594,850,279.

    13F-HR 0000902219-25-000462 filed by WELLINGTON MANAGEMENT GROUP 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 4,798,420 shares
    Change vs previous 13F +125,983 shares

    0.11% of the 13F portfolio, value $602,633,568.

    13F-HR 0000902219-25-000356 filed by WELLINGTON MANAGEMENT GROUP 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 4,672,437 shares
    Change vs previous 13F -258,286 shares

    0.12% of the 13F portfolio, value $639,376,280.

    13F-HR 0000902219-25-000242 filed by WELLINGTON MANAGEMENT GROUP 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/A 4,930,723 shares
    Change vs previous 13F -200,470 shares

    0.14% of the 13F portfolio, value $754,006,161.

    13F-HR 0000902219-25-000131 filed by WELLINGTON MANAGEMENT GROUP 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 5,131,193 shares
    Change vs previous 13F not available

    0.17% of the 13F portfolio, value $994,630,453.

    13F-HR 0000902219-24-000498 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

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