William Blair & Company LLC

-

Assets, Funds, Holdings

Home | Sign Up | Log In
Message
Happy Holidays!! thanks for using AUM13F!!
List of Funds
Boston Firms
Boston Hedge Funds
Cornell Alumni Firms
CalPERS Portfolio
NYSCRF Portfolio
User Guide
Regulatory AUM vs AUM
LP Portfolios
Related Firms
Build a Portfolio
Comprehensive Search
William Blair & Company LLC
CRD #1252
SEC #801-688
CIK #0001644956, 0000012518
AUM $58.3 B (2025-03-31)
Employees 469 (43% Investors, 88% Brokers)
Phone312-236-1600
Address150 North Riverside Plaza
Chicago, IL 60606
Source [IAPD] [EDGAR] [Website] [Twitter] [LinkedIn] [Facebook] [Instagram]
Total AUM ($B)
705642281402000200820172026
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)
504030201002013201720212026
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]
Form 13D/13G Filer Form 13D/13G Subject Filed
William Blair Investment Management LLC Genedx Holdings Corp [2025-07-30]
William Blair Investment Management LLC Twist Bioscience Corp [2025-05-09]
William Blair Investment Management LLC Montrose Environmental Group Inc [2025-05-09]
William Blair Investment Management LLC Stride Inc [2025-02-12]
William Blair Investment Management LLC Baldwin Insurance Group Inc [2025-02-12]
William Blair Investment Management LLC El Pollo Loco Holdings Inc [2025-02-12]
William Blair Investment Management LLC ACV Auctions Inc [2024-11-14]
William Blair Investment Management LLC New Fortress Energy Inc [2024-11-14]
William Blair Investment Management LLC BBB Foods Inc [2024-11-14]
William Blair Investment Management LLC Amicus Therapeutics Inc [2024-11-14]
View All
Related Firms State AUM ($B)
William Blair Investment Management LLC
IL 71.6
William Blair & Company LLC
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
NY 32.6
Oppenheimer & Co Inc
NY 32.4
Terms | Privacy | Guide
tony@aum13f.com