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BLAIR WILLIAM & CO/IL: BSX position timeline

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

BLAIR WILLIAM & CO/IL held 24,066 BSX 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 24,066 shares
    Change vs previous 13F +3,026 shares

    <0.01% of the 13F portfolio, value $1,027,129.

    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 21,040 shares
    Change vs previous 13F -95,658 shares

    <0.01% of the 13F portfolio, value $1,320,289.

    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 116,698 shares
    Change vs previous 13F +1,520 shares

    0.03% of the 13F portfolio, value $11,127,133.

    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 115,178 shares
    Change vs previous 13F -3,590 shares

    0.03% of the 13F portfolio, value $11,244,863.

    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 118,768 shares
    Change vs previous 13F +826 shares

    0.04% of the 13F portfolio, value $12,756,868.

    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 117,942 shares
    Change vs previous 13F +95,505 shares

    0.04% of the 13F portfolio, value $11,898,035.

    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 22,437 shares
    Change vs previous 13F +2,461 shares

    0.01% of the 13F portfolio, value $2,004,114.

    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 19,976 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $1,673,989.

    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).