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Disclosery

ALLIANCEBERNSTEIN L.P.: BIIB position timeline

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

ALLIANCEBERNSTEIN L.P. held 214,975 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 214,975 shares
    Change vs previous 13F +2,078 shares

    0.01% of the 13F portfolio, value $39,411,367.

    13F-HR 0001109448-26-000261 filed by ALLIANCEBERNSTEIN L.P.
    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 212,897 shares
    Change vs previous 13F +29,153 shares

    0.01% of the 13F portfolio, value $37,467,743.

    13F-HR 0001109448-26-000101 filed by ALLIANCEBERNSTEIN L.P.
    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 183,744 shares
    Change vs previous 13F -53,531 shares

    0.01% of the 13F portfolio, value $32,337,107.

    13F-HR 0001109448-26-000021 filed by ALLIANCEBERNSTEIN L.P.
    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 237,275 shares
    Change vs previous 13F +6,167 shares

    0.01% of the 13F portfolio, value $33,237,482.

    13F-HR 0001109448-25-000079 filed by ALLIANCEBERNSTEIN L.P.
    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 231,108 shares
    Change vs previous 13F +2,054 shares

    0.01% of the 13F portfolio, value $29,024,854.

    13F-HR 0001532155-25-000161 filed by ALLIANCEBERNSTEIN L.P.
    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 229,054 shares
    Change vs previous 13F +48,331 shares

    0.01% of the 13F portfolio, value $31,343,749.

    13F-HR 0001532155-25-000116 filed by ALLIANCEBERNSTEIN L.P.
    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 180,723 shares
    Change vs previous 13F +1,592 shares

    0.01% of the 13F portfolio, value $27,636,161.

    13F-HR 0001532155-25-000050 filed by ALLIANCEBERNSTEIN L.P.
    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 179,131 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $34,722,753.

    13F-HR 0001532155-24-000162 filed by ALLIANCEBERNSTEIN L.P.
    Filed (acceptance time not in the bulk data set), ingested

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