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SEI INVESTMENTS CO: BIIB position timeline

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

SEI INVESTMENTS CO held 82,516 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 82,516 shares
    Change vs previous 13F +11,003 shares

    0.02% of the 13F portfolio, value $17,826,173.

    13F-HR 0002048251-26-006553 filed by SEI INVESTMENTS CO
    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 71,513 shares
    Change vs previous 13F +12,017 shares

    0.01% of the 13F portfolio, value $13,111,811.

    13F-HR 0002048251-26-003739 filed by SEI INVESTMENTS CO
    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 59,496 shares
    Change vs previous 13F +36,665 shares

    0.01% of the 13F portfolio, value $10,470,544.

    13F-HR 0000350894-26-000005 filed by SEI INVESTMENTS CO
    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 22,831 shares
    Change vs previous 13F +803 shares

    <0.01% of the 13F portfolio, value $3,197,785.

    13F-HR 0002048251-25-002343 filed by SEI INVESTMENTS CO
    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 22,028 shares
    Change vs previous 13F +3,713 shares

    <0.01% of the 13F portfolio, value $2,766,572.

    13F-HR 0001041062-25-000162 filed by SEI INVESTMENTS CO
    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/A 18,315 shares
    Change vs previous 13F -14,379 shares

    <0.01% of the 13F portfolio, value $2,506,120.

    13F-HR/A 0001041062-25-000106 filed by SEI INVESTMENTS CO
    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 32,694 shares
    Change vs previous 13F -75,258 shares

    0.01% of the 13F portfolio, value $4,999,441.

    13F-HR 0001041062-25-000019 filed by SEI INVESTMENTS CO
    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 107,952 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $20,925,650.

    13F-HR 0001041062-24-000165 filed by SEI INVESTMENTS CO
    Filed (acceptance time not in the bulk data set), ingested

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