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Disclosery

MASSACHUSETTS FINANCIAL SERVICES CO /MA/: BIIB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of MASSACHUSETTS FINANCIAL SERVICES CO /MA/ on BIIB, newest first. How the timeline and the estimate are built.

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ held 744,892 BIIB shares at 2026-06-30 per its 13F-HR filed 2026-08-03.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 744,892 shares
    Change vs previous 13F +24,263 shares

    0.05% of the 13F portfolio, value $163,127,433.

    13F-HR 0000912938-26-000775 filed by MASSACHUSETTS FINANCIAL SERVICES CO /MA/
    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 720,629 shares
    Change vs previous 13F +8,070 shares

    0.04% of the 13F portfolio, value $133,702,279.

    13F-HR 0000912938-26-000604 filed by MASSACHUSETTS FINANCIAL SERVICES CO /MA/
    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 712,559 shares
    Change vs previous 13F -16,757 shares

    0.04% of the 13F portfolio, value $125,403,258.

    13F-HR 0000912938-26-000025 filed by MASSACHUSETTS FINANCIAL SERVICES CO /MA/
    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 729,316 shares
    Change vs previous 13F +11,685 shares

    0.03% of the 13F portfolio, value $102,162,586.

    13F-HR 0000912938-25-000200 filed by MASSACHUSETTS FINANCIAL SERVICES CO /MA/
    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 717,631 shares
    Change vs previous 13F +9,216 shares

    0.03% of the 13F portfolio, value $90,127,277.

    13F-HR 0000912938-25-000121 filed by MASSACHUSETTS FINANCIAL SERVICES CO /MA/
    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 708,415 shares
    Change vs previous 13F -23,961 shares

    0.03% of the 13F portfolio, value $96,939,509.

    13F-HR 0000912938-25-000044 filed by MASSACHUSETTS FINANCIAL SERVICES CO /MA/
    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 732,376 shares
    Change vs previous 13F +21,192 shares

    0.04% of the 13F portfolio, value $111,994,938.

    13F-HR 0000912938-25-000009 filed by MASSACHUSETTS FINANCIAL SERVICES CO /MA/
    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 711,184 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $137,855,906.

    13F-HR 0000912938-24-000298 filed by MASSACHUSETTS FINANCIAL SERVICES CO /MA/
    Filed (acceptance time not in the bulk data set), ingested

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