BLAIR WILLIAM & CO/IL: BLK position timeline
Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BLAIR WILLIAM & CO/IL on BLK, newest first. How the timeline and the estimate are built.
BLAIR WILLIAM & CO/IL held 59,013 BLK shares at 2026-06-30 per its 13F-HR filed 2026-08-11.
the latest 13F is the newest step
- period ended2026-06-3013F 59,013 sharesChange vs previous 13F -275 shares
0.15% of the 13F portfolio, value $56,745,019.
13F-HR 0001104659-26-093821 filed by BLAIR WILLIAM & CO/IL
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2026-03-3113F 59,288 sharesChange vs previous 13F -7,312 shares
0.16% of the 13F portfolio, value $57,017,743.
13F-HR 0001104659-26-057897 filed by BLAIR WILLIAM & CO/IL
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2025-12-3113F 66,600 sharesChange vs previous 13F -3,410 shares
0.19% of the 13F portfolio, value $71,284,109.
13F-HR 0001104659-26-015563 filed by BLAIR WILLIAM & CO/IL
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2025-09-3013F 70,010 sharesChange vs previous 13F +528 shares
0.22% of the 13F portfolio, value $81,622,946.
13F-HR 0001104659-25-109927 filed by BLAIR WILLIAM & CO/IL
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2025-06-3013F 69,482 sharesChange vs previous 13F +3,674 shares
0.2% of the 13F portfolio, value $72,904,124.
13F-HR 0001104659-25-070274 filed by BLAIR WILLIAM & CO/IL
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2025-03-3113F 65,808 sharesChange vs previous 13F +13,185 shares
0.19% of the 13F portfolio, value $62,285,610.
13F-HR 0001104659-25-046545 filed by BLAIR WILLIAM & CO/IL
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2024-12-3113F 52,623 sharesChange vs previous 13F not available
0.16% of the 13F portfolio, value $53,944,543.
13F-HR 0001104659-25-011872 filed by BLAIR WILLIAM & CO/IL
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).