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Disclosery

UBS Group AG: BIIB position timeline

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

UBS Group AG held 2,285,318 BIIB shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 2,285,318 shares
    Change vs previous 13F +384,300 shares

    0.04% of the 13F portfolio, value $493,765,808.

    13F-HR 0000861177-26-000004 filed by UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC: 1,255,168 shares
    • UBS Group AG: 1,030,150 shares

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

  2. period ended2026-03-31
    13F 1,901,018 shares
    Change vs previous 13F -132,140 shares

    0.03% of the 13F portfolio, value $348,513,632.

    13F-HR 0000861177-26-000003 filed by UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC: 1,377,568 shares
    • UBS Group AG: 523,450 shares

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

  3. period ended2025-12-31
    13F 2,033,158 shares
    Change vs previous 13F -45,015 shares

    0.04% of the 13F portfolio, value $357,815,477.

    13F-HR 0000861177-26-000001 filed by UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC: 1,391,370 shares
    • UBS Group AG: 641,788 shares

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

  4. period ended2025-09-30
    13F 2,078,173 shares
    Change vs previous 13F -110,720 shares

    0.03% of the 13F portfolio, value $291,110,476.

    13F-HR 0001193125-25-282311 filed by UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC: 1,439,208 shares
    • UBS Group AG: 638,965 shares

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

  5. period ended2025-06-30
    13F 2,188,893 shares
    Change vs previous 13F +32,360 shares

    0.03% of the 13F portfolio, value $274,903,068.

    13F-HR 0000950123-25-008300 filed by UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC: 1,743,209 shares
    • UBS Group AG: 445,684 shares

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

  6. period ended2025-03-31
    13F 2,156,533 shares
    Change vs previous 13F -425,699 shares

    0.04% of the 13F portfolio, value $295,099,974.

    13F-HR 0000950123-25-005812 filed by UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC: 1,510,386 shares
    • UBS Group AG: 646,147 shares

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

  7. period ended2024-12-31
    13F 2,582,232 shares
    Change vs previous 13F +925,688 shares

    0.05% of the 13F portfolio, value $394,874,915.

    13F-HR 0000950123-25-002466 filed by UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC: 1,533,813 shares
    • UBS Group AG: 1,048,419 shares

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

  8. period ended2024-09-30
    13F 1,656,544 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $321,104,491.

    13F-HR 0000950123-24-011473 filed by UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC: 1,152,691 shares
    • UBS Group AG: 503,853 shares

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