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| William Blair Investment Management LLC
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| CRD # | 173961 |
| SEC # | 801-80640 |
| CIK # | 0001644956, 0000012518 |
| AUM | $71.6 B (2025-07-16) |
| Employees | 378 (40% Investors, 34% Brokers) |
| Phone | 312-236-1600 |
| Address | 150 North Riverside Plaza Chicago, IL 60606-1598 |
| Source | [IAPD] [EDGAR] [Website] [Twitter] [LinkedIn] [Instagram] |
| Total AUM ($B) |
|---|
| CIK | Period |
|---|---|
| 0001644956 0000012518 |
| Sector | Form 13F Holdings | Value ($B) |
|---|---|---|
| Microsoft Corp | 2.0 | |
| Nvidia Corp | 1.9 | |
| Taiwan Semiconductor Manufacturing Co Ltd | 1.5 | |
| Amazon Com Inc | 1.2 | |
| Apple Inc | 1.1 | |
| Facebook Inc | 1.1 | |
| Broadcom Inc | 0.8 | |
| Mastercard Inc | 0.7 | |
| MercadoLibre Inc | 0.6 | |
| Sea Ltd | 0.6 | |
| Carlyle Group LP | 0.5 | |
| Transunion Holding Company Inc | 0.4 | |
| Intuit Inc | 0.4 | |
| Costco Wholesale Corp /NEW | 0.4 | |
| Idexx Laboratories Inc /DE | 0.4 | |
| ServiceNow Inc | 0.4 | |
| Chipotle Mexican Grill Inc | 0.4 | |
| Talen Energy Corp | 0.3 | |
| Doximity Inc | 0.3 | |
| O Reilly Automotive Inc | 0.3 | |
| Primo Brands Corp | 0.3 | |
| Datadog Inc | 0.3 | |
| Cameco Corp | 0.3 | |
| Spotify Technology Sa | 0.3 | |
| Pure Storage Inc | 0.3 | |
| Linde PLC | 0.3 | |
| Agilent Technologies Inc | 0.3 | |
| Uber Technologies Inc | 0.3 | |
| Mercury Computer Systems Inc | 0.3 | |
| Live Nation Entertainment Inc | 0.2 | Prev | Page 1 | Next |
| Type | Form D Funds | Date | Sold ($M) | AUM ($M) |
|---|---|---|---|---|
| Other | William Blair New Energy Opportunities Fund LLC | [2023-03-29] | 4.8 | 0.0 |
| Other | William Blair Large Cap Core Fund LLC | [2021-03-30] | 8.6 | 3.0 |
| Other | William Blair Global Leaders Concentrated Fund LLC | [2020-03-25] | 5.0 | 6.4 |
| HF | William Blair Absolute Return Currency Fund LLC | [2019-03-26] | 110.1 | 0.0 |
| Other | William Blair Emerging Markets Growth Fund LLC | [2019-03-26] | 850.1 | 447.0 |
| Other | William Blair Emerging Markets Leaders Fund LLC | [2019-03-26] | 319.2 | 302.0 |
| Other | William Blair International Leaders Concentrated Fund LLC | [2019-03-26] | 26.7 | 1.1 |
| Other | William Blair China A-Shares Growth Fund LP | [2018-03-27] | 138.1 | 7.0 |
| Other | William Blair Emerging Markets Leaders Concentrated Fund LLC | [2018-03-27] | 7.3 | 0.9 |
| Other | William Blair International Leaders Fund LLC | [2017-03-29] | 472.1 | 299.7 |
| View All | ||||
| AUM Breakdown | Accounts | AUM ($B) |
|---|---|---|
| By Client Type | ||
| (a) Individuals (other than high net worth individuals) | 0 | 0.0 |
| (b) Individuals (high net worth individuals) | 4 | 0.0 |
| (c) Banking or thrift institutions | 0 | 0.0 |
| (d) Investment companies | 30 | 17.9 |
| (e) Business development companies | 0 | 0.0 |
| (f) Pooled investment vehicles | 64 | 23.3 |
| (g) Pension and profit sharing plans | 86 | 12.0 |
| (h) Charitable organizations | 70 | 2.6 |
| (i) State or municipal government entities | 56 | 12.7 |
| (j) Other investment advisers | 3 | 0.6 |
| (k) Insurance companies | 4 | 0.0 |
| (l) Sovereign wealth funds and foreign official institutions | 5 | 1.7 |
| (m) Corporations or other businesses not listed above | 11 | 0.4 |
| (n) Other | 714 | 0.4 |
| Total | 1,047 | 71.6 |
| By Discretionary | ||
| Discretionary | 1,047 | 71.6 |
| Non-Discretionary | 0 | 0.0 |
| Total | 1,047 | 71.6 |
| By Non-United States Persons | ||
| Non-United States Persons | 8.2 | |
| United States Persons | 63.4 | |
| Total | 1,047 | 71.6 |
| Form D Directors | # Filings | # Firms | 2011 - 2025 | |
|---|---|---|---|---|
| John Moore | 60 | |||
| Richard Kiphart | 15 | |||
| Howard Smith | 40 | |||
| Richard Smirl | 25 | |||
| Advanced Strategies LLC William Blair | 25 | |||
| Michelle Seitz | 24 | |||
| Robert Newman | 15 | |||
| Arthur Simon | 15 | |||
| Edgar Jannotta | 4 | |||
| Matthew Calhoun | 3 | |||
| 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) |
|---|---|---|
|
LSV Asset Management
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|
IL | 91.1 |
|
DoubleLine Capital LP
✚
|
FL | 90.1 |
|
Eaton Vance Management
✚
|
MA | 84.9 |
|
RBC Global Asset Management US Inc
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|
MN | 76.5 |
|
City National Rochdale LLC
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|
NY | 68.2 |
|
Brandywine Global Investment Management LLC
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|
PA | 66.4 |
|
Pzena Investment Management LLC
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|
NY | 63.7 |
|
Russell Investment Management LLC
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|
WA | 62.4 |
|
Eagle Asset Management Inc
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|
FL | 58.5 |
|
GW&K Investment Management LLC
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|
MA | 52.9 |