WILLIAM BLAIR & COMPANY L.L.C.
CRD #1252 SEC #801-688 CHICAGO, IL 312-236-1600
SEC Registered Broker-Dealer Private Funds Disclosures
Total AUM
$58.3B
Discretionary
$52.9B
Employees
469
Clients
--
Accounts
37,973
AUM Over Time
| Date | Total AUM | Discretionary | Non-Disc. | Employees | Clients |
|---|---|---|---|---|---|
| Aug 2025 | $58.3B | $52.9B | $5.4B | 469 | 0 |
| Mar 2025 | $58.3B | $52.9B | $5.4B | 469 | 0 |
| May 2024 | $50B | $46.2B | $3.8B | 440 | 0 |
| Mar 2024 | $50B | $46.2B | $3.8B | 440 | 0 |
| Jan 2024 | $41.7B | $38.1B | $3.6B | 459 | 0 |
| Nov 2023 | $41.7B | $38.1B | $3.6B | 459 | 0 |
| Oct 2023 | $41.7B | $38.1B | $3.6B | 459 | 0 |
| Aug 2023 | $41.7B | $38.1B | $3.6B | 459 | 0 |
| Jul 2023 | $41.7B | $38.1B | $3.6B | 459 | 0 |
| Jul 2023 | $41.7B | $38.1B | $3.6B | 459 | 0 |
| Jul 2023 | $41.7B | $38.1B | $3.6B | 459 | 0 |
| Apr 2023 | $41.7B | $38.1B | $3.6B | 345 | 0 |
| Apr 2023 | $41.7B | $38.1B | $3.6B | 345 | 0 |
| Mar 2023 | $41.7B | $38.1B | $3.6B | 345 | 0 |
| Jan 2023 | $50B | $47.7B | $2.2B | 326 | 0 |
| Oct 2022 | $50B | $47.7B | $2.2B | 326 | 0 |
| Sep 2022 | $50B | $47.7B | $2.2B | 326 | 0 |
| Jun 2022 | $50B | $47.7B | $2.2B | 326 | 0 |
| Apr 2022 | $50B | $47.7B | $2.2B | 326 | 0 |
| Apr 2022 | $50B | $47.7B | $2.2B | 326 | 0 |
| Mar 2022 | $50B | $47.7B | $2.2B | 326 | 0 |
| Mar 2022 | $42.2B | $40.4B | $1.9B | 303 | 0 |
| Feb 2022 | $42.2B | $40.4B | $1.9B | 303 | 0 |
| Feb 2022 | $42.2B | $40.4B | $1.9B | 303 | 0 |
| Sep 2021 | $42.2B | $40.4B | $1.9B | 303 | 0 |
| Jul 2021 | $42.2B | $40.4B | $1.9B | 303 | 0 |
| Mar 2021 | $42.2B | $40.4B | $1.9B | 303 | 0 |
| Mar 2021 | $33B | $31.4B | $1.6B | 277 | 0 |
| Feb 2021 | $33B | $31.4B | $1.6B | 277 | 0 |
| Feb 2021 | $33B | $31.4B | $1.6B | 277 | 0 |
| Oct 2020 | $33B | $31.4B | $1.6B | 277 | 0 |
| Jun 2020 | $33B | $31.4B | $1.6B | 277 | 0 |
| Mar 2020 | $33B | $31.4B | $1.6B | 277 | 0 |
| Jan 2020 | $25.2B | $22.2B | $3B | 259 | 0 |
| Mar 2019 | $25.2B | $22.2B | $3B | 259 | 0 |
| Nov 2018 | $32.4B | $21.5B | $11B | 240 | 0 |
| Aug 2018 | $32.4B | $21.5B | $11B | 240 | 0 |
| Mar 2018 | $32.4B | $21.5B | $11B | 240 | 0 |
| Jan 2018 | $16.2B | $16.2B | $6.7M | 215 | 0 |
| Nov 2017 | $16.2B | $16.2B | $6.7M | 215 | 0 |
| Sep 2017 | $16.2B | $16.2B | $6.7M | 215 | 12,900 |
| Sep 2017 | $16.2B | $16.2B | $6.7M | 215 | 12,900 |
| Aug 2017 | $16.2B | $16.2B | $6.7M | 215 | 12,900 |
| May 2017 | $16.2B | $16.2B | $6.7M | 215 | 12,900 |
| Mar 2017 | $16.2B | $16.2B | $6.7M | 215 | 12,900 |
| Mar 2016 | $16.3B | $16.3B | $9.3M | 297 | 11,800 |
| Aug 2015 | $35.8B | $35.8B | $55.9M | 355 | 11,700 |
| Apr 2015 | $68.8B | $68.7B | $21.2M | 355 | 11,200 |
| Mar 2015 | $68.8B | $68.7B | $21.2M | 355 | 11,200 |
| Feb 2015 | $66.8B | $66.8B | $5M | 344 | 8,800 |
| Mar 2014 | $66.8B | $66.8B | $5M | 344 | 8,800 |
| Jan 2014 | $52.9B | $52.8B | $41.9M | 350 | 8,800 |
| Jul 2013 | $52.9B | $52.8B | $41.9M | 350 | 8,800 |
| Apr 2013 | $52.9B | $52.8B | $41.9M | 350 | 8,800 |
| Mar 2013 | $52.9B | $52.8B | $41.9M | 350 | 8,800 |
| Jan 2013 | $44B | $43.9B | $25.2M | 350 | 8,400 |
| Mar 2012 | $44B | $43.9B | $25.2M | 251 | 8,400 |
| Dec 2011 | $47.9B | $47.8B | $22.1M | 251 | 10,000 |
| Jul 2011 | $47.9B | $47.8B | $22.1M | 251 | -- |
| Apr 2011 | $47.9B | $47.8B | $22.1M | 251 | -- |
| Mar 2011 | $47.9B | $47.8B | $22.1M | 251 | -- |
| Nov 2010 | $44.3B | $39.7B | $4.6B | 501 | -- |
| Mar 2010 | $44.3B | $39.7B | $4.6B | 501 | -- |
| Mar 2009 | $32.4B | $28.4B | $4.1B | 501 | -- |
| Mar 2007 | $45.9B | $45.9B | $78.9M | 501 | -- |
| Nov 2006 | $36.5B | $36.5B | $14.5M | 501 | -- |
| Mar 2006 | $36.5B | $36.5B | $14.5M | 501 | -- |
| Dec 2003 | $12.4B | $11.9B | $551.4M | 501 | -- |
| Apr 2002 | $12.7B | $11.7B | $1B | 501 | -- |
| Jul 2001 | $12.7B | $11.7B | $1B | -- | -- |
| May 2001 | $12.7B | $11.7B | $1B | -- | -- |
DateAug 2025
Total AUM$58.3B
Discretionary$52.9B
Non-Disc.$5.4B
Employees469
Clients0
DateMar 2025
Total AUM$58.3B
Discretionary$52.9B
Non-Disc.$5.4B
Employees469
Clients0
DateMay 2024
Total AUM$50B
Discretionary$46.2B
Non-Disc.$3.8B
Employees440
Clients0
DateMar 2024
Total AUM$50B
Discretionary$46.2B
Non-Disc.$3.8B
Employees440
Clients0
DateJan 2024
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees459
Clients0
DateNov 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees459
Clients0
DateOct 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees459
Clients0
DateAug 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees459
Clients0
DateJul 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees459
Clients0
DateJul 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees459
Clients0
DateJul 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees459
Clients0
DateApr 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees345
Clients0
DateApr 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees345
Clients0
DateMar 2023
Total AUM$41.7B
Discretionary$38.1B
Non-Disc.$3.6B
Employees345
Clients0
DateJan 2023
Total AUM$50B
Discretionary$47.7B
Non-Disc.$2.2B
Employees326
Clients0
DateOct 2022
Total AUM$50B
Discretionary$47.7B
Non-Disc.$2.2B
Employees326
Clients0
DateSep 2022
Total AUM$50B
Discretionary$47.7B
Non-Disc.$2.2B
Employees326
Clients0
DateJun 2022
Total AUM$50B
Discretionary$47.7B
Non-Disc.$2.2B
Employees326
Clients0
DateApr 2022
Total AUM$50B
Discretionary$47.7B
Non-Disc.$2.2B
Employees326
Clients0
DateApr 2022
Total AUM$50B
Discretionary$47.7B
Non-Disc.$2.2B
Employees326
Clients0
DateMar 2022
Total AUM$50B
Discretionary$47.7B
Non-Disc.$2.2B
Employees326
Clients0
DateMar 2022
Total AUM$42.2B
Discretionary$40.4B
Non-Disc.$1.9B
Employees303
Clients0
DateFeb 2022
Total AUM$42.2B
Discretionary$40.4B
Non-Disc.$1.9B
Employees303
Clients0
DateFeb 2022
Total AUM$42.2B
Discretionary$40.4B
Non-Disc.$1.9B
Employees303
Clients0
DateSep 2021
Total AUM$42.2B
Discretionary$40.4B
Non-Disc.$1.9B
Employees303
Clients0
DateJul 2021
Total AUM$42.2B
Discretionary$40.4B
Non-Disc.$1.9B
Employees303
Clients0
DateMar 2021
Total AUM$42.2B
Discretionary$40.4B
Non-Disc.$1.9B
Employees303
Clients0
DateMar 2021
Total AUM$33B
Discretionary$31.4B
Non-Disc.$1.6B
Employees277
Clients0
DateFeb 2021
Total AUM$33B
Discretionary$31.4B
Non-Disc.$1.6B
Employees277
Clients0
DateFeb 2021
Total AUM$33B
Discretionary$31.4B
Non-Disc.$1.6B
Employees277
Clients0
DateOct 2020
Total AUM$33B
Discretionary$31.4B
Non-Disc.$1.6B
Employees277
Clients0
DateJun 2020
Total AUM$33B
Discretionary$31.4B
Non-Disc.$1.6B
Employees277
Clients0
DateMar 2020
Total AUM$33B
Discretionary$31.4B
Non-Disc.$1.6B
Employees277
Clients0
DateJan 2020
Total AUM$25.2B
Discretionary$22.2B
Non-Disc.$3B
Employees259
Clients0
DateMar 2019
Total AUM$25.2B
Discretionary$22.2B
Non-Disc.$3B
Employees259
Clients0
DateNov 2018
Total AUM$32.4B
Discretionary$21.5B
Non-Disc.$11B
Employees240
Clients0
DateAug 2018
Total AUM$32.4B
Discretionary$21.5B
Non-Disc.$11B
Employees240
Clients0
DateMar 2018
Total AUM$32.4B
Discretionary$21.5B
Non-Disc.$11B
Employees240
Clients0
DateJan 2018
Total AUM$16.2B
Discretionary$16.2B
Non-Disc.$6.7M
Employees215
Clients0
DateNov 2017
Total AUM$16.2B
Discretionary$16.2B
Non-Disc.$6.7M
Employees215
Clients0
DateSep 2017
Total AUM$16.2B
Discretionary$16.2B
Non-Disc.$6.7M
Employees215
Clients12,900
DateSep 2017
Total AUM$16.2B
Discretionary$16.2B
Non-Disc.$6.7M
Employees215
Clients12,900
DateAug 2017
Total AUM$16.2B
Discretionary$16.2B
Non-Disc.$6.7M
Employees215
Clients12,900
DateMay 2017
Total AUM$16.2B
Discretionary$16.2B
Non-Disc.$6.7M
Employees215
Clients12,900
DateMar 2017
Total AUM$16.2B
Discretionary$16.2B
Non-Disc.$6.7M
Employees215
Clients12,900
DateMar 2016
Total AUM$16.3B
Discretionary$16.3B
Non-Disc.$9.3M
Employees297
Clients11,800
DateAug 2015
Total AUM$35.8B
Discretionary$35.8B
Non-Disc.$55.9M
Employees355
Clients11,700
DateApr 2015
Total AUM$68.8B
Discretionary$68.7B
Non-Disc.$21.2M
Employees355
Clients11,200
DateMar 2015
Total AUM$68.8B
Discretionary$68.7B
Non-Disc.$21.2M
Employees355
Clients11,200
DateFeb 2015
Total AUM$66.8B
Discretionary$66.8B
Non-Disc.$5M
Employees344
Clients8,800
DateMar 2014
Total AUM$66.8B
Discretionary$66.8B
Non-Disc.$5M
Employees344
Clients8,800
DateJan 2014
Total AUM$52.9B
Discretionary$52.8B
Non-Disc.$41.9M
Employees350
Clients8,800
DateJul 2013
Total AUM$52.9B
Discretionary$52.8B
Non-Disc.$41.9M
Employees350
Clients8,800
DateApr 2013
Total AUM$52.9B
Discretionary$52.8B
Non-Disc.$41.9M
Employees350
Clients8,800
DateMar 2013
Total AUM$52.9B
Discretionary$52.8B
Non-Disc.$41.9M
Employees350
Clients8,800
DateJan 2013
Total AUM$44B
Discretionary$43.9B
Non-Disc.$25.2M
Employees350
Clients8,400
DateMar 2012
Total AUM$44B
Discretionary$43.9B
Non-Disc.$25.2M
Employees251
Clients8,400
DateDec 2011
Total AUM$47.9B
Discretionary$47.8B
Non-Disc.$22.1M
Employees251
Clients10,000
DateJul 2011
Total AUM$47.9B
Discretionary$47.8B
Non-Disc.$22.1M
Employees251
Clients--
DateApr 2011
Total AUM$47.9B
Discretionary$47.8B
Non-Disc.$22.1M
Employees251
Clients--
DateMar 2011
Total AUM$47.9B
Discretionary$47.8B
Non-Disc.$22.1M
Employees251
Clients--
DateNov 2010
Total AUM$44.3B
Discretionary$39.7B
Non-Disc.$4.6B
Employees501
Clients--
DateMar 2010
Total AUM$44.3B
Discretionary$39.7B
Non-Disc.$4.6B
Employees501
Clients--
DateMar 2009
Total AUM$32.4B
Discretionary$28.4B
Non-Disc.$4.1B
Employees501
Clients--
DateMar 2007
Total AUM$45.9B
Discretionary$45.9B
Non-Disc.$78.9M
Employees501
Clients--
DateNov 2006
Total AUM$36.5B
Discretionary$36.5B
Non-Disc.$14.5M
Employees501
Clients--
DateMar 2006
Total AUM$36.5B
Discretionary$36.5B
Non-Disc.$14.5M
Employees501
Clients--
DateDec 2003
Total AUM$12.4B
Discretionary$11.9B
Non-Disc.$551.4M
Employees501
Clients--
DateApr 2002
Total AUM$12.7B
Discretionary$11.7B
Non-Disc.$1B
Employees501
Clients--
DateJul 2001
Total AUM$12.7B
Discretionary$11.7B
Non-Disc.$1B
Employees--
Clients--
DateMay 2001
Total AUM$12.7B
Discretionary$11.7B
Non-Disc.$1B
Employees--
Clients--