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William Blair Investment Management, LLC

CIK:0001644956
Investment Adviser
$72B AUM
417 holdings
Chicago, IL, USA
Founded:1935
333 employees
Latest filing:Jun 30, 2025

William Blair Investment Management, LLC is a global investment firm offering active investment management in US equity, non-US equity, emerging markets debt, and more.

Investment Strategy

Disciplined, analytical research processes across a wide range of strategies, including US equity, non-US equity, and emerging markets debt.

Top Buys
N
NVDANVIDIA CORPORATION
+$616.9M
M
MSFTMICROSOFT CORP
+$431.2M
A
AVGOBROADCOM INC
+$300.2M
T
TSMTAIWAN SEMICONDUCTOR MFG LTD
+$278.2M
B
BWXTBWX TECHNOLOGIES INC
+$194.6M
Top Sells
Y
YUMCYUM CHINA HLDGS INC
-$256.8M
C
CPRTCOPART INC
-$173.3M
P
PANWPALO ALTO NETWORKS INC
-$171.6M
G
GTLSCHART INDS INC
-$149.8M
C
CGNXCOGNEX CORP
-$142.6M

Top Holdings

M
MSFTMICROSOFT CORP
+5.3%$1.98B
N
NVDANVIDIA CORPORATION
+5.1%$1.94B
T
TSMTAIWAN SEMICONDUCTOR MFG LTD
+4.0%$1.50B
A
AMZNAMAZON COM INC
+3.1%$1.18B
A
AAPLAPPLE INC
+2.9%$1.08B

Equity Positions (411)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
M
MSFT
MICROSOFT CORP5.26%$1.98B3,981,721$252.39$497.41+$431.2M
N
NVDA
NVIDIA CORPORATION5.15%$1.94B12,272,393$55.05$157.99+$616.9M
T
TSM
TAIWAN SEMICONDUCTOR MFG LTD3.98%$1.50B6,622,255$46.87$226.49+$278.2M
A
AMZN
AMAZON COM INC3.14%$1.18B5,400,353$118.52$219.39+$20.7M
A
AAPL
APPLE INC2.86%$1.08B5,253,841$221.69$205.17-$85.9M

Industry Allocation

SERVICES-PREPACKAGED SOFTWARE
+14.8%
SEMICONDUCTORS & RELATED DEVICES
+11.8%
SERVICES-BUSINESS SERVICES, NEC
+6.1%
SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
+3.6%
RETAIL-CATALOG & MAIL-ORDER HOUSES
+3.3%