William Blair Investment Management, LLC Top Holdings and 13F Report (2024) About William Blair Investment Management, LLCInvestment ActivityWilliam Blair Investment Management, LLC has $40.53 billion in total holdings as of September 30, 2024.William Blair Investment Management, LLC owns shares of 412 different stocks, but just 108 companies or ETFs make up 80% of its holdings.Approximately 13.31% of the portfolio was purchased this quarter.About 12.17% of the portfolio was sold this quarter.This quarter, William Blair Investment Management, LLC has purchased 411 new stocks and bought additional shares in 141 stocks.William Blair Investment Management, LLC sold shares of 229 stocks and completely divested from 41 stocks this quarter.Largest Holdings Microsoft $1,963,234,378NVIDIA $1,549,499,178Taiwan Semiconductor Manufacturing $1,426,982,628Apple $1,330,230,785Amazon.com $1,275,987,095 Largest New Holdings this Quarter Manhattan Associates $175,701,269 HoldingnVent Electric $167,269,036 HoldingAZEK $165,852,227 HoldingSEA $158,910,732 HoldingTPG $150,732,660 Holding Largest Purchases this Quarter Meta Platforms 1,421,779 shares (about $813.88M)Apple 1,747,660 shares (about $407.20M)TransUnion 2,198,113 shares (about $230.14M)Manhattan Associates 624,427 shares (about $175.70M)nVent Electric 2,380,715 shares (about $167.27M) Largest Sales this Quarter Alphabet 6,962,832 shares (about $1.15B)Merit Medical Systems 1,614,929 shares (about $159.60M)Virtu Financial 4,928,558 shares (about $150.12M)PDD 919,806 shares (about $123.97M)Taiwan Semiconductor Manufacturing 675,220 shares (about $117.24M) Sector Allocation Over TimeMap of 500 Largest Holdings ofWilliam Blair Investment Management, LLC Selling Neutral Buying Latest 13F Holdings and Changes Since Previous Quarterly FilingIssuer NameHoldings ValueApproximate Purchase/SaleChange in SharesShares Held% of PortfolioSectorMSFTMicrosoft$1,963,234,378$24,106,268 ▲1.2%4,562,4784.8%Computer and TechnologyNVDANVIDIA$1,549,499,178$18,626,588 ▲1.2%12,759,3813.8%Computer and TechnologyTSMTaiwan Semiconductor Manufacturing$1,426,982,628$117,244,152 ▼-7.6%8,218,1263.5%Computer and TechnologyAAPLApple$1,330,230,785$407,204,780 ▲44.1%5,709,1453.3%Computer and TechnologyAMZNAmazon.com$1,275,987,095$19,481,174 ▲1.6%6,847,9963.1%Retail/WholesaleMETAMeta Platforms$904,920,594$813,883,171 ▲894.0%1,580,8132.2%Computer and TechnologyMAMastercard$705,995,050$35,133,860 ▼-4.7%1,429,7191.7%Business ServicesMELIMercadoLibre$675,004,554$16,893,787 ▲2.6%328,9561.7%Retail/WholesaleLINDE PLC$569,961,193$37,809,753 ▲7.1%1,195,2381.4%SHSCGThe Carlyle Group$494,177,038$2,970,322 ▼-0.6%11,476,4761.2%FinanceNOWServiceNow$443,922,427$12,893,526 ▲3.0%496,3411.1%Computer and TechnologyACNAccenture$402,520,755$37,323,246 ▲10.2%1,138,7371.0%Computer and TechnologyAMDAdvanced Micro Devices$402,304,634$94,813,956 ▲30.8%2,451,8811.0%Computer and TechnologyUBERUber Technologies$371,828,320$122,649,921 ▲49.2%4,947,1570.9%Computer and TechnologyICLRICON Public$361,822,412$28,963,146 ▲8.7%1,259,3450.9%MedicalUNHUnitedHealth Group$357,724,770$21,977,537 ▼-5.8%611,8300.9%MedicalCMGChipotle Mexican Grill$356,524,845$63,886,290 ▲21.8%6,187,5190.9%Retail/WholesaleBWXTBWX Technologies$343,933,539$87,770,467 ▼-20.3%3,164,0620.8%Computer and TechnologyISRGIntuitive Surgical$338,345,018$15,901,919 ▲4.9%688,7150.8%MedicalINTUIntuit$327,528,441$23,268,249 ▼-6.6%527,4210.8%Computer and TechnologyEHCEncompass Health$319,281,745$56,551,602 ▼-15.0%3,303,8260.8%MedicalBCOBrink's$318,711,309$1,659,434 ▼-0.5%2,756,0650.8%Business ServicesCRMSalesforce$316,533,572$6,625,972 ▲2.1%1,156,4560.8%Computer and TechnologyCOSTCostco Wholesale$303,070,160$21,454,671 ▼-6.6%341,8650.7%Retail/WholesaleCPRTCopart$302,947,194$48,400,780 ▲19.0%5,781,4350.7%Business ServicesZTSZoetis$295,662,548$16,407,038 ▲5.9%1,513,2690.7%MedicalCHEChemed$291,940,409$6,256,098 ▲2.2%485,7820.7%MedicalEXASExact Sciences$291,890,998$27,640,235 ▲10.5%4,284,9530.7%MedicalITUBItaú Unibanco$286,253,173$34,075,929 ▲13.5%43,053,6970.7%FinanceTXNTexas Instruments$284,954,829$59,373,792 ▼-17.2%1,379,4590.7%Computer and TechnologyDOCSDoximity$281,907,311$2,882,068 ▲1.0%6,470,2160.7%MedicalORLYO'Reilly Automotive$275,256,584$14,991,529 ▲5.8%239,0210.7%Retail/WholesalePANWPalo Alto Networks$270,944,518$71,030,142 ▼-20.8%792,6990.7%Computer and TechnologyTRUTransUnion$270,256,352$230,142,432 ▲573.7%2,581,2450.7%Business ServicesMRCYMercury Systems$270,081,944$32,673,331 ▲13.8%7,299,5120.7%AerospaceDTDynatrace$267,258,566$30,508,217 ▲12.9%4,998,2900.7%Computer and TechnologyCWSTCasella Waste Systems$263,858,623$1,456,235 ▼-0.5%2,652,1120.7%Industrial ProductsRACEFerrari$262,853,545$23,301,472 ▲9.7%559,1320.6%Auto/Tires/TrucksCWANClearwater Analytics$262,175,346$1,202,203 ▼-0.5%10,383,1820.6%Computer and TechnologyBFAMBright Horizons Family Solutions$257,515,780$4,109,452 ▼-1.6%1,837,6920.6%Consumer DiscretionaryCCJCameco$255,414,033$56,732,003 ▲28.6%5,347,8650.6%Basic MaterialsLRCXLam Research$252,562,071$10,365,032 ▲4.3%309,4820.6%Computer and TechnologyEXLSExlService$247,238,514$52,752,675 ▲27.1%6,480,6950.6%Business ServicesAAgilent Technologies$246,761,643$94,220,530 ▲61.8%1,661,9180.6%Computer and TechnologySNSharkNinja$243,152,527$32,392,971 ▼-11.8%2,236,7080.6%Consumer DiscretionaryMNSTMonster Beverage$231,092,128$9,298,259 ▼-3.9%4,429,5980.6%Consumer StaplesACHCAcadia Healthcare$230,159,531$7,243,958 ▲3.2%3,629,7040.6%MedicalEGEverest Group$227,961,526$633,197 ▲0.3%581,7870.6%FinanceWALWestern Alliance Bancorporation$227,036,164$16,331,388 ▼-6.7%2,624,9990.6%FinanceMLMMartin Marietta Materials$223,629,419$21,887,398 ▲10.8%415,4750.6%ConstructionNEOGNeogen$223,101,211$21,161,470 ▲10.5%13,271,9340.6%MedicalCFLTConfluent$220,700,930$87,224,464 ▲65.3%10,829,2900.5%Business ServicesAPOApollo Global Management$216,519,993$18,760,608 ▼-8.0%1,733,4080.5%FinancePOOLPool$214,263,552$3,018,922 ▼-1.4%568,6400.5%Consumer DiscretionaryCFCF Industries$205,378,516$30,175,774 ▲17.2%2,393,6890.5%Basic MaterialsGWREGuidewire Software$205,088,180$26,705,947 ▼-11.5%1,121,0680.5%Computer and TechnologyCPCanadian Pacific Kansas City$203,165,626$90,158,476 ▼-30.7%2,375,0950.5%TransportationFRPTFreshpet$200,577,035$37,451,319 ▼-15.7%1,466,5280.5%Consumer StaplesPRMWPrimo Water$196,755,373$158,671,328 ▲416.6%7,792,2920.5%UtilitiesNICENICE$196,151,463$4,080,252 ▼-2.0%1,129,5320.5%Computer and TechnologyINSPInspire Medical Systems$191,284,956$28,689,293 ▲17.6%906,3490.5%MedicalPENPenumbra$190,678,152$30,376,482 ▲18.9%981,3090.5%MedicalFLYWFlywire$189,728,411$2,555,627 ▼-1.3%11,575,8640.5%Computer and TechnologyPODDInsulet$188,416,478$30,893,140 ▼-14.1%809,5230.5%MedicalTYLTyler Technologies$186,598,940$78,851,816 ▼-29.7%319,6720.5%Computer and TechnologyCGNXCognex$185,737,901$22,987,071 ▲14.1%4,586,1210.5%Computer and TechnologyWSCWillScot Mobile Mini$183,889,418$9,278,740 ▲5.3%4,890,6760.5%FinanceCCKCrown$183,708,956$70,457,705 ▼-27.7%1,916,0300.5%Industrial ProductsPLNTPlanet Fitness$182,256,218$2,034,074 ▼-1.1%2,243,9820.4%Consumer DiscretionaryLSCCLattice Semiconductor$180,165,804$12,301,997 ▲7.3%3,394,8710.4%Computer and TechnologyWMSAdvanced Drainage Systems$179,709,160$45,043,942 ▼-20.0%1,143,4790.4%ConstructionLRNStride$178,411,618$2,624,903 ▼-1.4%2,091,3330.4%Consumer DiscretionaryELFe.l.f. Beauty$178,376,133$13,503,147 ▲8.2%1,636,0280.4%Consumer StaplesINSMInsmed$176,726,284$76,563,860 ▼-30.2%2,420,9080.4%MedicalMANHManhattan Associates$175,701,269$175,701,269 ▲New Holding624,4270.4%Computer and TechnologyNOVTNovanta$172,564,762$774,366 ▲0.5%964,4800.4%Computer and TechnologyACVAACV Auctions$171,723,749$69,796,407 ▲68.5%8,446,8150.4%Retail/WholesaleLANCLancaster Colony$171,711,853$7,403,227 ▼-4.1%972,4860.4%Consumer StaplesEXPEagle Materials$168,616,115$2,615,026 ▼-1.5%586,1850.4%ConstructionNVTnVent Electric$167,269,036$167,269,036 ▲New Holding2,380,7150.4%Computer and TechnologyLYVLive Nation Entertainment$167,007,944$27,769,073 ▼-14.3%1,525,3260.4%Consumer DiscretionaryHDBHDFC Bank$166,794,856$10,268,835 ▲6.6%2,667,1200.4%FinanceFOLDAmicus Therapeutics$166,426,034$27,550,117 ▲19.8%15,582,9620.4%MedicalAZEKAZEK$165,852,227$165,852,227 ▲New Holding3,543,8510.4%ConstructionGTLSChart Industries$165,509,903$28,149,862 ▲20.5%1,333,2520.4%Industrial ProductsTENBTenable$165,058,787$34,221,004 ▲26.2%4,073,5140.4%Computer and TechnologyONONON$158,952,581$2,301,935 ▼-1.4%3,169,5430.4%Consumer DiscretionarySESEA$158,910,732$158,910,732 ▲New Holding1,685,6490.4%Computer and TechnologyFSVFirstService$158,038,094$781,111 ▲0.5%866,1520.4%FinanceTWSTTwist Bioscience$157,104,188$13,233,629 ▲9.2%3,477,2950.4%MedicalGOOGLAlphabet$156,331,864$1,154,785,654 ▼-88.1%942,6100.4%Computer and TechnologyBPMCBlueprint Medicines$154,918,908$7,481,678 ▲5.1%1,674,7990.4%MedicalTPGTPG$150,732,660$150,732,660 ▲New Holding2,618,7050.4%FinanceRRXRegal Rexnord$146,716,547$51,269,029 ▲53.7%884,4740.4%Industrial ProductsSHOPShopify$144,534,173$12,282,737 ▼-7.8%1,803,5210.4%Computer and TechnologyCHDNChurchill Downs$144,208,496$22,734,345 ▲18.7%1,066,5520.4%Consumer DiscretionaryMMSIMerit Medical Systems$142,170,118$159,603,434 ▼-52.9%1,438,5320.4%MedicalVEEVVeeva Systems$141,797,196$29,120,092 ▲25.8%675,6430.3%Computer and TechnologyALTRAltair Engineering$140,512,784$51,323,827 ▲57.5%1,471,1840.3%ConstructionEVHEvolent Health$139,683,574$2,452,922 ▼-1.7%4,939,3060.3%Computer and TechnologyShowing largest 100 holdings. 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