BLAIR WILLIAM & CO/IL

Business address
150 North Riverside Plaza, Chicago, IL, 60606-5312
Top securities (13F)
MSFT, AAPL, AMZN, NVDA, GOOG, JPM, V, IDXX, GOOGL, SPY, MA, COST, META, UBER, GEV, VEEV, NOW, PGR, FAST, and APH
State of incorporation
DE
Fiscal year end
31 December
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BLAIR WILLIAM & CO/IL has filed 1,144 SEC EDGAR filings since 14 Feb 1994

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
SCHEDULE 13G/A Open Document Open Filing 14 Nov 2025
13F-HR Open Document Open Filing 12 Nov 2025 30 Sep 2025 028-04871
N-PX Open Document Open Filing 13 Aug 2025 30 Jun 2025 028-04871
13F-HR Open Document Open Filing 24 Jul 2025 30 Jun 2025 028-04871
13F-HR Open Document Open Filing 09 May 2025 31 Mar 2025 028-04871
13F-HR Open Document Open Filing 12 Feb 2025 31 Dec 2024 028-04871
13F-HR Open Document Open Filing 12 Nov 2024 30 Sep 2024 028-04871
N-PX Open Document Open Filing 16 Aug 2024 30 Jun 2024 028-04871
13F-HR Open Document Open Filing 12 Aug 2024 30 Jun 2024 028-04871
13F-HR Open Document Open Filing 09 May 2024 31 Mar 2024 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2024
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2024
13F-HR Open Document Open Filing 12 Feb 2024 31 Dec 2023 028-04871
13F-HR Open Document Open Filing 09 Nov 2023 30 Sep 2023 028-04871
13F-HR Open Document Open Filing 11 Aug 2023 30 Jun 2023 028-04871
13F-HR Open Document Open Filing 12 May 2023 31 Mar 2023 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 10 Feb 2023
SC 13G/A Open Document Open Filing SC 13G/A 10 Feb 2023
13F-HR Open Document Open Filing 10 Feb 2023 31 Dec 2022 028-04871
13F-HR Open Document Open Filing 09 Nov 2022 30 Sep 2022 028-04871
13F-HR Open Document Open Filing 10 Aug 2022 30 Jun 2022 028-04871
13F-HR Open Document Open Filing 13 May 2022 31 Mar 2022 028-04871
13F-HR Open Document Open Filing 14 Feb 2022 31 Dec 2021 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 11 Feb 2022
SC 13G/A Open Document Open Filing SC 13G/A 11 Feb 2022
SC 13G/A Open Document Open Filing SC 13G/A 11 Feb 2022
13F-HR Open Document Open Filing 12 Nov 2021 30 Sep 2021 028-04871
13F-HR Open Document Open Filing 12 Aug 2021 30 Jun 2021 028-04871
13F-HR Open Document Open Filing 13 May 2021 31 Mar 2021 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 11 Feb 2021
SC 13G/A Open Document Open Filing SC 13G/A 11 Feb 2021
SC 13G/A Open Document Open Filing SC 13G/A 11 Feb 2021
SC 13G Open Document Open Filing SC 13G 11 Feb 2021
SC 13G/A Open Document Open Filing SC 13G/A 11 Feb 2021
13F-HR Open Document Open Filing 09 Feb 2021 31 Dec 2020 028-04871
13F-HR Open Document Open Filing 06 Nov 2020 30 Sep 2020 028-04871
13F-HR Open Document Open Filing 12 Aug 2020 30 Jun 2020 028-04871
13F-HR Open Document Open Filing 11 May 2020 31 Mar 2020 028-04871
SC 13G Open Document Open Filing SC 13G 10 Apr 2020
SC 13G/A Open Document Open Filing SC 13G/A 13 Feb 2020
SC 13G Open Document Open Filing SC 13G 13 Feb 2020
SC 13G/A Open Document Open Filing SC 13G/A 13 Feb 2020
13F-HR Open Document Open Filing 13 Feb 2020 31 Dec 2019 028-04871
13F-HR Open Document Open Filing 12 Nov 2019 30 Sep 2019 028-04871
13F-HR Open Document Open Filing 13 Aug 2019 30 Jun 2019 028-04871
13F-HR Open Document Open Filing 14 May 2019 31 Mar 2019 028-04871
13F-HR Open Document Open Filing 14 Feb 2019 31 Dec 2018 028-04871
SC 13G Open Document Open Filing SCHEDULE 13G 12 Feb 2019
SC 13G Open Document Open Filing SCHEDULE 13G 12 Feb 2019
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 12 Feb 2019
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 12 Feb 2019
13F-HR Open Document Open Filing 13 Nov 2018 30 Sep 2018 028-04871
13F-HR Open Document Open Filing 13 Aug 2018 30 Jun 2018 028-04871
13F-HR Open Document Open Filing 15 May 2018 31 Mar 2018 028-04871
13F-HR Open Document Open Filing 14 Feb 2018 31 Dec 2017 028-04871
SC 13G Open Document Open Filing SC 13G 12 Feb 2018
SC 13G Open Document Open Filing SC 13G 12 Feb 2018
13F-HR Open Document Open Filing 13 Nov 2017 30 Sep 2017 028-04871
13F-HR Open Document Open Filing 04 Aug 2017 30 Jun 2017 028-04871
13F-HR Open Document Open Filing 10 May 2017 31 Mar 2017 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 14 Feb 2017
SC 13G/A Open Document Open Filing SC 13G/A 14 Feb 2017
13F-HR Open Document Open Filing 14 Feb 2017 31 Dec 2016 028-04871
13F-HR Open Document Open Filing 14 Nov 2016 30 Sep 2016 028-04871
13F-HR Open Document Open Filing 08 Aug 2016 30 Jun 2016 028-04871
13F-HR Open Document Open Filing 16 May 2016 31 Mar 2016 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 22 Mar 2016
13F-HR Open Document Open Filing 16 Feb 2016 31 Dec 2015 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
SC 13G Open Document Open Filing SC 13G 12 Feb 2016
SC 13G/A Open Document Open Filing SC 13G/A 12 Feb 2016
13F-HR Open Document Open Filing 12 Nov 2015 30 Sep 2015 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 09 Oct 2015
SC 13G/A Open Document Open Filing SC 13G/A 07 Aug 2015
SC 13G/A Open Document Open Filing SC 13G/A 07 Aug 2015
SC 13G/A Open Document Open Filing SC 13G/A 07 Aug 2015
SC 13G/A Open Document Open Filing SC 13G/A 07 Aug 2015
13F-HR Open Document Open Filing 03 Aug 2015 30 Jun 2015 028-04871
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 10 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 2 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 2 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 1 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 2 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 3 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 4 02 Jul 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G AMENDMENT NO. 4 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
SC 13G/A Open Document Open Filing SC 13G/A 02 Jul 2015
13F-HR Open Document Open Filing 11 May 2015 31 Mar 2015 028-04871
APP ORDR Open Document Open Filing 29 Apr 2015 812-14354
APP NTC Open Document Open Filing 02 Apr 2015 812-14354
40-APP/A Open Document Open Filing AMENDED EXEMPTIVE APPLICATION 24 Mar 2015 812-14354
APP ORDR Open Document Open Filing 17 Mar 2015 812-14349
APP NTC Open Document Open Filing 17 Mar 2015 812-14349
SC 13G Open Document Open Filing 18 Feb 2015 005-80314
SC 13G Open Document Open Filing 13 Feb 2015 005-80314
SC 13G/A Open Document Open Filing SC 13G/A 09 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 09 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 09 Feb 2015
13F-HR Open Document Open Filing 05 Feb 2015 31 Dec 2014 028-04871
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G Open Document Open Filing SC 13G 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
SC 13G/A Open Document Open Filing SC 13G/A 04 Feb 2015
40-APP/A Open Document Open Filing AMENDED EXEMPTIVE APPLICATION 18 Nov 2014 812-14349
SC 13G Open Document Open Filing SC 13G 07 Nov 2014
SC 13G Open Document Open Filing SC 13G 07 Nov 2014
13F-HR Open Document Open Filing 04 Nov 2014 30 Sep 2014 028-04871
40-APP Open Document Open Filing EXEMPTIVE APPLICATION 29 Aug 2014 812-14354
40-APP Open Document Open Filing EXEMPTIVE APPLICATION 18 Aug 2014 812-14349
SC 13G/A Open Document Open Filing SC 13G/A 07 Aug 2014
13F-HR Open Document Open Filing 01 Aug 2014 30 Jun 2014 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 08 Jul 2014
SC 13G Open Document Open Filing SC 13G 09 Jun 2014
13F-HR Open Document Open Filing 06 May 2014 31 Mar 2014 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 07 Mar 2014
13F-HR Open Document Open Filing 11 Feb 2014 31 Dec 2013 028-04871
SC 13G/A Open Document Open Filing SC 13G/A 07 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 07 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G Open Document Open Filing SC 13G 06 Feb 2014
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2014