WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
CRD #173961 SEC #801-80640 CHICAGO, IL 312-236-1600
SEC Registered Private Funds Disclosures
Total AUM
$71.6B
Discretionary
$71.6B
Employees
378
Clients
--
Accounts
1,047
AUM Over Time
| Date | Total AUM | Discretionary | Non-Disc. | Employees | Clients |
|---|---|---|---|---|---|
| Aug 2025 | $71.6B | $71.6B | $0 | 378 | 16 |
| Jul 2025 | $71.6B | $71.6B | $0 | 378 | 16 |
| Jun 2025 | $71.6B | $71.6B | $0 | 378 | 16 |
| Apr 2025 | $71.6B | $71.6B | $0 | 378 | 16 |
| Mar 2025 | $71.6B | $71.6B | $0 | 378 | 16 |
| Feb 2025 | $67.2B | $67.2B | $0 | 372 | 16 |
| Jan 2025 | $67.2B | $67.2B | $0 | 372 | 16 |
| Mar 2024 | $67.2B | $67.2B | $0 | 372 | 16 |
| Mar 2024 | $67.2B | $67.2B | $0 | 372 | 16 |
| Jan 2024 | $56B | $56B | $0 | 377 | 13 |
| Oct 2023 | $56B | $56B | $0 | 377 | 13 |
| Jul 2023 | $56B | $56B | $0 | 377 | 13 |
| Mar 2023 | $56B | $56B | $0 | 377 | 13 |
| Jan 2023 | $79.7B | $79.7B | $0 | 389 | 0 |
| Sep 2022 | $79.7B | $79.7B | $0 | 389 | 0 |
| Jul 2022 | $79.7B | $79.7B | $0 | 389 | 0 |
| Mar 2022 | $79.7B | $79.7B | $0 | 389 | 0 |
| Feb 2022 | $69.7B | $69.7B | $0 | 345 | 0 |
| Jul 2021 | $69.7B | $69.7B | $0 | 345 | 0 |
| Mar 2021 | $69.7B | $69.7B | $0 | 345 | 0 |
| Jan 2021 | $58.4B | $58.4B | $0 | 355 | 0 |
| May 2020 | $58.4B | $58.4B | $0 | 355 | 0 |
| Mar 2020 | $58.4B | $58.4B | $0 | 355 | 0 |
| Jan 2020 | $48.9B | $48.9B | $0 | 348 | 0 |
| Nov 2019 | $48.9B | $48.9B | $0 | 348 | 0 |
| Mar 2019 | $48.9B | $48.9B | $0 | 348 | 0 |
| Sep 2018 | $63.9B | $63.9B | $0 | 356 | 0 |
| Aug 2018 | $63.9B | $63.9B | $0 | 356 | 0 |
| Mar 2018 | $63.9B | $63.9B | $0 | 356 | 0 |
| Feb 2018 | $57B | $57B | $0 | 352 | 0 |
| Nov 2017 | $57B | $57B | $0 | 352 | 0 |
| Sep 2017 | $57B | $57B | $0 | 352 | 400 |
| Jul 2017 | $57B | $57B | $0 | 352 | 400 |
| May 2017 | $57B | $57B | $0 | 352 | 400 |
| Mar 2017 | $57B | $57B | $0 | 352 | 400 |
| Mar 2016 | $56B | $56B | $0 | 230 | 400 |
| Aug 2015 | $41.1B | $41.1B | $0 | 205 | 300 |
| Mar 2015 | $116.8M | $116.8M | $0 | 205 | 1 |
| Nov 2014 | $0 | $0 | $0 | 205 | 0 |
DateAug 2025
Total AUM$71.6B
Discretionary$71.6B
Non-Disc.$0
Employees378
Clients16
DateJul 2025
Total AUM$71.6B
Discretionary$71.6B
Non-Disc.$0
Employees378
Clients16
DateJun 2025
Total AUM$71.6B
Discretionary$71.6B
Non-Disc.$0
Employees378
Clients16
DateApr 2025
Total AUM$71.6B
Discretionary$71.6B
Non-Disc.$0
Employees378
Clients16
DateMar 2025
Total AUM$71.6B
Discretionary$71.6B
Non-Disc.$0
Employees378
Clients16
DateFeb 2025
Total AUM$67.2B
Discretionary$67.2B
Non-Disc.$0
Employees372
Clients16
DateJan 2025
Total AUM$67.2B
Discretionary$67.2B
Non-Disc.$0
Employees372
Clients16
DateMar 2024
Total AUM$67.2B
Discretionary$67.2B
Non-Disc.$0
Employees372
Clients16
DateMar 2024
Total AUM$67.2B
Discretionary$67.2B
Non-Disc.$0
Employees372
Clients16
DateJan 2024
Total AUM$56B
Discretionary$56B
Non-Disc.$0
Employees377
Clients13
DateOct 2023
Total AUM$56B
Discretionary$56B
Non-Disc.$0
Employees377
Clients13
DateJul 2023
Total AUM$56B
Discretionary$56B
Non-Disc.$0
Employees377
Clients13
DateMar 2023
Total AUM$56B
Discretionary$56B
Non-Disc.$0
Employees377
Clients13
DateJan 2023
Total AUM$79.7B
Discretionary$79.7B
Non-Disc.$0
Employees389
Clients0
DateSep 2022
Total AUM$79.7B
Discretionary$79.7B
Non-Disc.$0
Employees389
Clients0
DateJul 2022
Total AUM$79.7B
Discretionary$79.7B
Non-Disc.$0
Employees389
Clients0
DateMar 2022
Total AUM$79.7B
Discretionary$79.7B
Non-Disc.$0
Employees389
Clients0
DateFeb 2022
Total AUM$69.7B
Discretionary$69.7B
Non-Disc.$0
Employees345
Clients0
DateJul 2021
Total AUM$69.7B
Discretionary$69.7B
Non-Disc.$0
Employees345
Clients0
DateMar 2021
Total AUM$69.7B
Discretionary$69.7B
Non-Disc.$0
Employees345
Clients0
DateJan 2021
Total AUM$58.4B
Discretionary$58.4B
Non-Disc.$0
Employees355
Clients0
DateMay 2020
Total AUM$58.4B
Discretionary$58.4B
Non-Disc.$0
Employees355
Clients0
DateMar 2020
Total AUM$58.4B
Discretionary$58.4B
Non-Disc.$0
Employees355
Clients0
DateJan 2020
Total AUM$48.9B
Discretionary$48.9B
Non-Disc.$0
Employees348
Clients0
DateNov 2019
Total AUM$48.9B
Discretionary$48.9B
Non-Disc.$0
Employees348
Clients0
DateMar 2019
Total AUM$48.9B
Discretionary$48.9B
Non-Disc.$0
Employees348
Clients0
DateSep 2018
Total AUM$63.9B
Discretionary$63.9B
Non-Disc.$0
Employees356
Clients0
DateAug 2018
Total AUM$63.9B
Discretionary$63.9B
Non-Disc.$0
Employees356
Clients0
DateMar 2018
Total AUM$63.9B
Discretionary$63.9B
Non-Disc.$0
Employees356
Clients0
DateFeb 2018
Total AUM$57B
Discretionary$57B
Non-Disc.$0
Employees352
Clients0
DateNov 2017
Total AUM$57B
Discretionary$57B
Non-Disc.$0
Employees352
Clients0
DateSep 2017
Total AUM$57B
Discretionary$57B
Non-Disc.$0
Employees352
Clients400
DateJul 2017
Total AUM$57B
Discretionary$57B
Non-Disc.$0
Employees352
Clients400
DateMay 2017
Total AUM$57B
Discretionary$57B
Non-Disc.$0
Employees352
Clients400
DateMar 2017
Total AUM$57B
Discretionary$57B
Non-Disc.$0
Employees352
Clients400
DateMar 2016
Total AUM$56B
Discretionary$56B
Non-Disc.$0
Employees230
Clients400
DateAug 2015
Total AUM$41.1B
Discretionary$41.1B
Non-Disc.$0
Employees205
Clients300
DateMar 2015
Total AUM$116.8M
Discretionary$116.8M
Non-Disc.$0
Employees205
Clients1
DateNov 2014
Total AUM$0
Discretionary$0
Non-Disc.$0
Employees205
Clients0