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BLAIR WILLIAM & CO/IL: WST position timeline

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

BLAIR WILLIAM & CO/IL held 61,152 WST 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 61,152 shares
    Change vs previous 13F -1,314 shares

    0.06% of the 13F portfolio, value $21,953,449.

    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 62,466 shares
    Change vs previous 13F +150 shares

    0.04% of the 13F portfolio, value $15,656,516.

    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 62,316 shares
    Change vs previous 13F -1,683 shares

    0.05% of the 13F portfolio, value $17,145,495.

    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 63,999 shares
    Change vs previous 13F -7,737 shares

    0.04% of the 13F portfolio, value $16,788,837.

    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 71,736 shares
    Change vs previous 13F -10,849 shares

    0.04% of the 13F portfolio, value $15,695,822.

    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 82,585 shares
    Change vs previous 13F -21,281 shares

    0.06% of the 13F portfolio, value $18,489,022.

    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 103,866 shares
    Change vs previous 13F +2,656 shares

    0.1% of the 13F portfolio, value $34,022,477.

    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 101,210 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $30,379,286.

    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).