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Disclosery

NORGES BANK: BIIB position timeline

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

NORGES BANK held 2,580,033 BIIB shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 2,580,033 shares
    Change vs previous 13F +2,580,033 shares

    0.06% of the 13F portfolio, value $557,441,930.

    13F-HR 0001374170-26-000069 filed by NORGES BANK
    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 0 shares
    Change vs previous 13F -2,638,834 shares

    13F-HR 0001374170-26-000023 filed by NORGES BANK
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  3. period ended2025-12-31
    13F 2,638,834 shares
    Change vs previous 13F +2,638,834 shares

    0.05% of the 13F portfolio, value $464,408,396.

    13F-HR 0001374170-26-000012 filed by NORGES BANK
    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 0 shares
    Change vs previous 13F -2,264,177 shares

    13F-HR 0001374170-25-000104 filed by NORGES BANK
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  5. period ended2025-06-30
    13F 2,264,177 shares
    Change vs previous 13F +110,791 shares

    0.04% of the 13F portfolio, value $284,357,989.

    13F-HR 0001374170-25-000079 filed by NORGES BANK
    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 2,153,386 shares
    Change vs previous 13F -171,813 shares

    0.04% of the 13F portfolio, value $294,669,340.

    13F-HR/A 0001374170-26-000021 filed by NORGES BANK
    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 2,325,199 shares
    Change vs previous 13F +60,807 shares

    0.05% of the 13F portfolio, value $355,569,431.

    13F-HR 0001374170-25-000027 filed by NORGES BANK
    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/A 2,264,392 shares
    Change vs previous 13F not available

    0.06% of the 13F portfolio, value $438,929,745.

    13F-HR/A 0001374170-25-000102 filed by NORGES BANK
    Filed (acceptance time not in the bulk data set), ingested

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