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| Happy Holidays!! thanks for using AUM13F!! |
| William Blair & Company LLC
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| CRD # | 1252 |
| SEC # | 801-688 |
| CIK # | 0001644956, 0000012518 |
| AUM | $58.3 B (2025-03-31) |
| Employees | 469 (43% Investors, 88% Brokers) |
| Phone | 312-236-1600 |
| Address | 150 North Riverside Plaza Chicago, IL 60606 |
| Source | [IAPD] [EDGAR] [Website] [Twitter] [LinkedIn] [Facebook] [Instagram] |
| Total AUM ($B) |
|---|
| Sector | Form 13F Holdings | Value ($B) | |
|---|---|---|---|
| Microsoft Corp | 2.0 | ||
| Nvidia Corp | 1.9 | ||
| Taiwan Semiconductor Manufacturing Co Ltd | 1.5 | ||
| Amazon Com Inc | 1.2 | ||
| Apple Inc | 1.1 | ||
| Facebook Inc | 1.1 | ||
| Broadcom Inc | 0.8 | ||
| Mastercard Inc | 0.7 | ||
| MercadoLibre Inc | 0.6 | ||
| Sea Ltd | 0.6 | ||
| View All | |||
| Holdings by Sector ($B) |
|---|
| Type | Form D Funds | Date | Sold ($M) | AUM ($M) |
|---|---|---|---|---|
| PE | William Blair MB Investments LP - WD Series | [2025-03-31] | 0.0 | 1.0 |
| PE | William Blair MB Investments LP - CXT 2022 Series | [2023-01-11] | 0.0 | 4.8 |
| PE | William Blair MB Investments LP - BRPE FIII 2022 Series | [2022-09-26] | 0.0 | 0.1 |
| PE | William Blair MB Investments LP - HC FII 2021 Series | [2022-06-14] | 0.0 | 7.5 |
| PE | William Blair MB Investments LP - HII 2022 Eries | [2022-06-14] | 0.0 | 6.3 |
| PE | William Blair MB Investments LP - ITYC 2022 Series | [2022-04-11] | 0.0 | 2.5 |
| PE | William Blair MB Investments LP - PCTI 2022 Series | [2022-04-11] | 0.0 | 6.8 |
| PE | William Blair MB Investments LP - TCP FIII 2022 Series | [2022-04-11] | 0.0 | 4.5 |
| PE | William Blair MB Investments LP - FICI 2022 Series | [2022-03-07] | 0.0 | 9.7 |
| PE | William Blair MB Investments LP - HV FIII 2021 Series | [2022-02-09] | 0.0 | 1.5 |
| View All | ||||
| AUM Breakdown | Accounts | AUM ($B) |
|---|---|---|
| By Client Type | ||
| (a) Individuals (other than high net worth individuals) | 25,794 | 10.5 |
| (b) Individuals (high net worth individuals) | 9,102 | 37.7 |
| (c) Banking or thrift institutions | 0 | 0.0 |
| (d) Investment companies | 0 | 0.0 |
| (e) Business development companies | 0 | 0.0 |
| (f) Pooled investment vehicles | 31 | 0.1 |
| (g) Pension and profit sharing plans | 91 | 0.2 |
| (h) Charitable organizations | 32 | 0.1 |
| (i) State or municipal government entities | 0 | 0.0 |
| (j) Other investment advisers | 914 | 1.1 |
| (k) Insurance companies | 0 | 0.0 |
| (l) Sovereign wealth funds and foreign official institutions | 0 | 0.0 |
| (m) Corporations or other businesses not listed above | 1,299 | 7.7 |
| (n) Other | 252 | 0.9 |
| Total | 37,973 | 58.3 |
| By Discretionary | ||
| Discretionary | 36,981 | 52.9 |
| Non-Discretionary | 992 | 5.4 |
| Total | 37,973 | 58.3 |
| By Non-United States Persons | ||
| Non-United States Persons | 0.2 | |
| United States Persons | 58.1 | |
| Total | 37,973 | 58.3 |
| Form D Directors | # Filings | # Firms | 2011 - 2025 | |
|---|---|---|---|---|
| John Moore | 60 | |||
| Richard Kiphart | 15 | |||
| Advanced Strategies LLC William Blair | 25 | |||
| Richard Smirl | 25 | |||
| Michelle Seitz | 24 | |||
| Arthur Simon | 15 | |||
| Robert Newman | 15 | |||
| Edgar Jannotta | 4 | |||
| General Partner William Blair Mb Investments GP LLC | 22 | |||
| James Wildman | 21 | |||
| View All | ||||
| EDGAR Form | CIK | 2011 - 2025 |
|---|---|---|
| 13F-HR | [0001644956] | |
| SC 13G | [0001644956] |
| Related Firms | State | AUM ($B) |
|---|---|---|
|
William Blair Investment Management LLC
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|
IL | 71.6 |
|
William Blair & Company LLC
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|
IL | 58.3 |
| Comparable Firms | State | AUM ($B) |
|---|---|---|
|
Fort Washington Investment Advisors Inc
✚
|
OH | 84.9 |
|
Metropolitan West Asset Management LLC
✚
|
CA | 82.5 |
|
WCM Investment Management LLC
✚
|
CA | 74.7 |
|
TCW Asset Management Company LLC
✚
|
CA | 70.4 |
|
Apogem Capital LLC
✚
|
NY | 40.6 |
|
Select Equity Group LP
✚
|
NY | 40.6 |
|
Investure LLC
✚
|
VA | 35.0 |
|
First Manhattan Co LLC
✚
|
NY | 34.4 |
|
Rockefeller & Co LLC
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|
NY | 32.6 |
|
Oppenheimer & Co Inc
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|
NY | 32.4 |