BLAIR WILLIAM & CO/IL: WSO position timeline

BLAIR WILLIAM & CO/IL held 564,024 WSO 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 564,024 shares

   Change vs previous 13F -18,676 shares

   0.61% of the 13F portfolio, value $235,045,592.

   13F-HR 0001104659-26-093821 filed by BLAIR WILLIAM & CO/IL
   Filed 2026-08-11 (acceptance time not in the bulk data set), ingested 2026-10-06 09:57:27 UTC

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

2. period ended2026-03-31

   13F 582,700 shares

   Change vs previous 13F -92,740 shares

   0.61% of the 13F portfolio, value $211,980,580.

   13F-HR 0001104659-26-057897 filed by BLAIR WILLIAM & CO/IL
   Filed 2026-05-08 (acceptance time not in the bulk data set), ingested 2026-10-06 09:58:43 UTC

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

3. period ended2025-12-31

   13F 675,440 shares

   Change vs previous 13F -124,516 shares

   0.61% of the 13F portfolio, value $227,589,413.

   13F-HR 0001104659-26-015563 filed by BLAIR WILLIAM & CO/IL
   Filed 2026-02-17 (acceptance time not in the bulk data set), ingested 2026-10-07 03:01:36 UTC

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

4. period ended2025-09-30

   13F 799,956 shares

   Change vs previous 13F -6,700 shares

   0.86% of the 13F portfolio, value $323,422,258.

   13F-HR 0001104659-25-109927 filed by BLAIR WILLIAM & CO/IL
   Filed 2025-11-12 (acceptance time not in the bulk data set), ingested 2026-10-07 03:02:25 UTC

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

5. period ended2025-06-30

   13F 806,656 shares

   Change vs previous 13F -8,056 shares

   0.99% of the 13F portfolio, value $356,235,351.

   13F-HR 0001104659-25-070274 filed by BLAIR WILLIAM & CO/IL
   Filed 2025-07-24 (acceptance time not in the bulk data set), ingested 2026-10-07 18:23:11 UTC

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

6. period ended2025-03-31

   13F 814,712 shares

   Change vs previous 13F +43,776 shares

   1.25% of the 13F portfolio, value $414,118,211.

   13F-HR 0001104659-25-046545 filed by BLAIR WILLIAM & CO/IL
   Filed 2025-05-09 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:06 UTC

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

7. period ended2024-12-31

   13F 770,936 shares

   Change vs previous 13F -14,109 shares

   1.06% of the 13F portfolio, value $365,338,662.

   13F-HR 0001104659-25-011872 filed by BLAIR WILLIAM & CO/IL
   Filed 2025-02-12 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:55 UTC

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

8. period ended2024-09-30

   13F 785,045 shares

   Change vs previous 13F not available

   1.13% of the 13F portfolio, value $386,148,008.

   13F-HR 0001104659-24-116499 filed by BLAIR WILLIAM & CO/IL
   Filed 2024-11-12 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC

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