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William Blair Investment Management, LLC

Q4 2025 Holdings

Filed 2026-02-09 | 413 holdings | $35.9B | 13F-HR | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↓Shares% Portfolio
Nvidia Corporation(NVDA)COM67066G104$2.0B10,628,6675.5%
Taiwan Semiconductor MFG LTD(TSM)SPONSORED ADS874039100$1.8B5,985,3305.1%
Microsoft Corp(MSFT)COM594918104$1.7B3,490,3024.7%
Apple Inc(AAPL)COM037833100$1.5B5,444,3284.1%
Amazon COM Inc(AMZN)COM023135106$1.0B4,387,0032.8%
Alphabet Inc(GOOGL)CAP STK CL A02079K305$987.5M3,154,9732.8%
Broadcom Inc(AVGO)COM11135F101$877.9M2,536,6112.4%
Meta Platforms Inc(META)CL A30303M102$783.4M1,186,7692.2%
Mastercard Incorporated(MA)CL A57636Q104$619.4M1,084,9471.7%
Carlyle Group Inc(CG)COM14316J108$421.6M7,131,9021.2%
Transunion(TRU)COM89400J107$340.0M3,965,4950.9%
Mercadolibre Inc(MELI)COM58733R102$333.5M165,5790.9%
Servicenow Inc(NOW)COM81762P102$329.2M2,148,7800.9%
NU Hldgs LTD(NU)ORD SHS CL AG6683N103$313.0M18,699,3670.9%
SEA LTD(SE)SPONSORD ADS81141R100$302.4M2,370,8760.8%
Idexx Labs Inc(IDXX)COM45168D104$298.6M441,3240.8%
Snowflake Inc(SNOW)COM SHS833445109$295.5M1,346,9980.8%
Intuit(INTU)COM461202103$293.0M442,3910.8%
Monster Beverage Corp New(MNST)COM61174X109$288.4M3,761,2490.8%
Advanced Micro Devices Inc(AMD)COM007903107$286.9M1,339,5460.8%
Costco Whsl Corp New(COST)COM22160K105$283.3M328,4680.8%
Agilent Technologies Inc(A)COM00846U101$280.7M2,063,0090.8%
Linde PLC(LIN)SHSG54950103$274.4M643,4700.8%
Onto Innovation Inc(ONTO)COM683344105$272.6M1,726,5870.8%
Oreilly Automotive Inc(ORLY)COM67103H107$271.9M2,981,5070.8%
Itau Unibanco Hldg S A(BVXB)SPON ADR REP PFD465562106$261.7M36,551,7630.7%
Ciena Corp(CIEN)COM NEW171779309$256.9M1,098,5930.7%
Unitedhealth Group Inc(UNH)COM91324P102$251.6M762,2430.7%
Pure Storage Inc(PSTG)CL A74624M102$250.8M3,742,9280.7%
Oracle Corp(ORCL)COM68389X105$244.9M1,256,5360.7%
Doximity Inc(DOCS)CL A26622P107$241.6M5,456,9850.7%
Tyler Technologies Inc(TYL)COM902252105$224.8M495,2970.6%
Credicorp LTD(BAP)COMG2519Y108$220.2M767,4130.6%
Globus MED Inc(GMED)CL A379577208$220.0M2,519,7820.6%
Talen Energy Corp(TLN)COM87422Q109$213.4M569,3990.6%
Insmed Inc(INSM)COM PAR $.01457669307$212.5M1,221,0960.6%
Primo Brands Corporation(PRMB)CLASS A COM SHS741623102$206.5M12,627,4200.6%
Madrigal Pharmaceuticals Inc(MDGL)COM558868105$206.3M354,2200.6%
Mueller Inds Inc(MLI)COM624756102$204.3M1,779,9060.6%
Everest Group LTD(EG)COMG3223R108$198.3M584,3010.6%
Veeva SYS Inc(VEEV)CL A COM922475108$196.7M881,2230.5%
Q2 Hldgs Inc(QTWO)COM74736L109$194.5M2,694,7180.5%
BWX Technologies Inc(BWXT)COM05605H100$191.4M1,107,6000.5%
Twist Bioscience Corp(TWST)COM90184D100$188.9M5,954,4290.5%
Argenx SE(ARGX)SPONSORED ADR04016X101$188.1M223,6660.5%
The Baldwin Insurance GRP in(BWIN)COM CL A05589G102$181.3M7,543,8130.5%
Cameco Corp(CCJ)COM13321L108$181.2M1,980,8270.5%
Brinks Co(BCO)COM109696104$180.3M1,544,6410.5%
Copart Inc(CPRT)COM217204106$179.5M4,585,8330.5%
Waystar Hldg Corp(WAY)COM946784105$173.0M5,282,2200.5%
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