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BLAIR WILLIAM & CO/IL: BX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BLAIR WILLIAM & CO/IL on BX, newest first. How the timeline and the estimate are built.

BLAIR WILLIAM & CO/IL held 1,011,005 BX shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,011,005 shares
    Change vs previous 13F -167,607 shares

    0.31% of the 13F portfolio, value $118,964,911.

    13F-HR 0001104659-26-093821 filed by BLAIR WILLIAM & CO/IL
    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 1,178,612 shares
    Change vs previous 13F -190,433 shares

    0.39% of the 13F portfolio, value $135,528,580.

    13F-HR 0001104659-26-057897 filed by BLAIR WILLIAM & CO/IL
    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 1,369,045 shares
    Change vs previous 13F +7,396 shares

    0.57% of the 13F portfolio, value $211,024,621.

    13F-HR 0001104659-26-015563 filed by BLAIR WILLIAM & CO/IL
    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 1,361,649 shares
    Change vs previous 13F +5,717 shares

    0.62% of the 13F portfolio, value $232,637,716.

    13F-HR 0001104659-25-109927 filed by BLAIR WILLIAM & CO/IL
    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 1,355,932 shares
    Change vs previous 13F +10,013 shares

    0.56% of the 13F portfolio, value $202,820,245.

    13F-HR 0001104659-25-070274 filed by BLAIR WILLIAM & CO/IL
    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 1,345,919 shares
    Change vs previous 13F -6,516 shares

    0.57% of the 13F portfolio, value $188,132,606.

    13F-HR 0001104659-25-046545 filed by BLAIR WILLIAM & CO/IL
    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 1,352,435 shares
    Change vs previous 13F +17,828 shares

    0.68% of the 13F portfolio, value $233,186,798.

    13F-HR 0001104659-25-011872 filed by BLAIR WILLIAM & CO/IL
    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 1,334,607 shares
    Change vs previous 13F not available

    0.6% of the 13F portfolio, value $204,368,347.

    13F-HR 0001104659-24-116499 filed by BLAIR WILLIAM & CO/IL
    Filed (acceptance time not in the bulk data set), ingested

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