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William Blair Investment Management, LLC

Q1 2021 Holdings

Filed 2021-05-13 | 367 holdings | $3.8B | 13F-HR | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↓Shares% Portfolio
Crown Hldgs Inc(CCK)COM228368106$334.1M3,443,4108.8%
Brooks Automation Inc New(AZTA)COM114340102$317.5M3,888,7598.4%
BJS Whsl Club Hldgs Inc(BJ)COM05550J101$304.9M6,797,5148.0%
Charles RIV Labs Intl Inc(CRL)COM159864107$287.6M992,1807.6%
Acadia Healthcare Company in(ACHC)COM00404A109$274.5M4,803,7627.2%
Bright Horizons FAM SOL in D(BFAM)COM109194100$265.9M1,550,9647.0%
Builders Firstsource Inc(BLDR)COM12008R107$257.1M5,544,1946.8%
Axon Enterprise Inc(AXON)COM05464C101$256.0M1,797,3636.8%
Alarm COM Hldgs Inc(ALRM)COM011642105$228.8M2,648,2936.0%
Burlington Stores Inc(BURL)COM122017106$219.9M736,0355.8%
Adobe Systems Incorporated(ADBE)COM00724F101$144.3M303,5823.8%
Certara Inc(CERT)COM15687V109$132.1M4,839,7153.5%
Advanced Micro Devices Inc(AMD)COM007903107$83.4M1,062,3262.2%
Butterfly Network Inc(BFLY)COM CL A124155102$78.4M4,659,5362.1%
Costco Whsl Corp New(COST)COM22160K105$76.0M215,5502.0%
Boot Barn Hldgs Inc(BOOT)COM099406100$61.0M979,4681.6%
Coupang Inc(CPNG)CL A22266T109$57.8M1,171,5331.5%
Canada Goose Hldgs Inc(GOOS)SHS SUB VTG135086106$54.4M1,385,8311.4%
Codexis Inc(CDXS)COM192005106$53.9M2,353,1061.4%
Casella Waste SYS Inc(CWST)CL A147448104$50.6M795,8071.3%
Cadence Design System Inc(CDNS)COM127387108$32.4M236,5570.9%
Axogen Inc(AXGN)COM05463X106$29.7M1,465,0470.8%
Align Technology Inc(ALGN)COM016255101$28.9M53,3750.8%
Caredx Inc(CDNA)COM14167L103$23.6M346,3660.6%
Cryolife Inc(AORT)COM228903100$21.5M952,5340.6%
Darling Ingredients Inc(DAR)COM237266101$16.0M217,5900.4%
Conmed Corp(CNMD)COM207410101$14.8M113,0720.4%
Curtiss Wright Corp(CW)COM231561101$11.7M98,7750.3%
Chart Inds Inc(GTLS)COM16115Q308$11.1M78,2350.3%
Centene Corp del(CNC)COM15135B101$9.7M152,0870.3%
CNX RES Corp(CNX)COM12653C108$8.4M573,3250.2%
Cavco Inds Inc del(CVCO)COM149568107$5.3M23,4400.1%
Avanos MED Inc(AVNS)COM05350V106$4.7M106,3670.1%
Carmax Inc(KMX)COM143130102$3.2M24,1330.1%
Allscripts Healthcare Solutn(MDRX)COM01988P108$3.1M209,2630.1%
Alibaba Group Hldg LTD(BABA)SPONSORED ADS01609W102$2.8M12,2700.1%
Taiwan Semiconductor MFG LTD(TSM)SPONSORED ADS874039100$1.2M10,338,9010.0%
Spdr S&P 500 ETF TR(SPY)TR UNIT78462F103$565.3K1,426,4500.0%
BWX Technologies Inc(BWXT)COM05605H100$492.0K7,461,4560.0%
Microsoft Corp(MSFT)COM594918104$454.2K1,926,5380.0%
Canadian Natl RY Co(CNI)COM136375102$442.8K3,816,2190.0%
Grand Canyon ED Inc(LOPE)COM38526M106$439.3K4,101,6330.0%
Brinks Co(BCO)COM109696104$422.5K5,332,5390.0%
Mercadolibre Inc(MELI)COM58733R102$404.9K275,0290.0%
Amazon COM Inc(AMZN)COM023135106$389.3K125,8320.0%
Horizon Therapeutics PUB LSHSG46188101$381.9K4,149,1950.0%
Encompass Health Corp(EHC)COM29261A100$376.7K4,599,8990.0%
Alphabet Inc(GOOGL)CAP STK CL A02079K305$336.1K162,9570.0%
Pure Storage Inc(PSTG)CL A74624M102$333.0K15,461,4070.0%
Martin Marietta Matls Inc(MLM)COM573284106$329.9K982,3320.0%
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