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William Blair Investment Management, LLC

All holdings · as of Dec 31, 2025

413 positions

CompanyClassValueShares% of portfolio
NVIDIA Corp—$1.98B10,628,6675.5%
TAIWAN SEMICONDUCTOR MANUFACTURING CO LTDTSMADR$1.82B5,985,3305.1%
MICROSOFT CORP—$1.69B3,490,3024.7%
Apple Inc.—$1.48B5,444,3284.1%
Amazon.com Inc—$1.01B4,387,0032.8%
Alphabet Inc.—$987.51M3,154,9732.8%
Broadcom Inc.—$877.92M2,536,6112.4%
Meta Platforms Inc—$783.37M1,186,7692.2%
Mastercard Inc—$619.37M1,084,9471.7%
Carlyle Group Inc.—$421.57M7,131,9021.2%
TransUnion—$340.04M3,965,4950.9%
MercadoLibre, Inc.—$333.52M165,5790.9%
ServiceNow Inc—$329.17M2,148,7800.9%
NU HLDGS LTD—$313.03M18,699,3670.9%
Sea Ltd—$302.42M2,370,8760.8%
IDEXX LABORATORIES INC /DE—$298.57M441,3240.8%
Snowflake Inc.—$295.48M1,346,9980.8%
INTUIT INC.—$293.05M442,3910.8%
Monster Beverage Corp—$288.37M3,761,2490.8%
ADVANCED MICRO DEVICES INC—$286.88M1,339,5460.8%
COSTCO WHOLESALE CORP /NEW—$283.25M328,4680.8%
Agilent Technologies Inc—$280.71M2,063,0090.8%
LINDE PLC—$274.37M643,4700.8%
ONTO INNOVATION INC.—$272.56M1,726,5870.8%
O REILLY AUTOMOTIVE INC—$271.94M2,981,5070.8%
Itau Unibanco Holding S.A.ITUBADR$261.68M36,551,7630.7%
CIENA CORP—$256.93M1,098,5930.7%
UNITEDHEALTH GROUP INC—$251.62M762,2430.7%
Everpure, Inc.—$250.81M3,742,9280.7%
ORACLE CORP—$244.91M1,256,5360.7%
Doximity, Inc.—$241.64M5,456,9850.7%
TYLER TECHNOLOGIES, INC.—$224.84M495,2970.6%
CREDICORP LTD.—$220.25M767,4130.6%
Globus Medical Inc—$220.00M2,519,7820.6%
Talen Energy Corp—$213.43M569,3990.6%
INSMED INC—$212.52M1,221,0960.6%
Primo Brands Corp—$206.46M12,627,4200.6%
MADRIGAL PHARMACEUTICALS, INC.—$206.28M354,2200.6%
MUELLER INDUSTRIES INC—$204.33M1,779,9060.6%
EVEREST GROUP, LTD.—$198.28M584,3010.6%
VEEVA SYSTEMS INC—$196.72M881,2230.5%
Q2 Holdings, Inc.—$194.45M2,694,7180.5%
BWX Technologies, Inc.—$191.44M1,107,6000.5%
Twist Bioscience Corp—$188.87M5,954,4290.5%
ARGENX SE—$188.07M223,6660.5%
Baldwin Insurance Group, Inc.—$181.28M7,543,8130.5%
CAMECO CORP—$181.23M1,980,8270.5%
BRINKS CO—$180.31M1,544,6410.5%
Copart Inc—$179.54M4,585,8330.5%
Waystar Holding Corp.—$172.99M5,282,2200.5%
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