IR
Superintel
OverviewMarketsWatchlist
© 2026 IR SuperintelMethodologyContact

William Blair Investment Management, LLC

Q3 2020 Holdings

Filed 2020-11-06 | 343 holdings | $2.3B | 13F-HR | View on SEC ↗ · Holdings Table ↗

Sign in to see sub-manager breakdown

IssuerClassCUSIPValue ↓Shares% Portfolio
BJS Whsl Club Hldgs Inc(BJ)COM05550J101$277.4M6,675,35212.3%
Crown Hldgs Inc(CCK)COM228368106$241.5M3,141,56310.7%
Bright Horizons FAM SOL in D(BFAM)COM109194100$235.0M1,545,77410.4%
Adobe Systems Incorporated(ADBE)COM00724F101$179.8M366,6878.0%
Brooks Automation Inc New(AZTA)COM114340102$178.0M3,848,7557.9%
Alarm COM Hldgs Inc(ALRM)COM011642105$163.9M2,966,5587.3%
Axon Enterprise Inc(AXON)COM05464C101$157.3M1,734,8207.0%
Burlington Stores Inc(BURL)COM122017106$128.9M625,6285.7%
Builders Firstsource Inc(BLDR)COM12008R107$108.0M3,312,0314.8%
Advanced Micro Devices Inc(AMD)COM007903107$90.9M1,108,3584.0%
Costco Whsl Corp New(COST)COM22160K105$81.3M229,0103.6%
Boot Barn Hldgs Inc(BOOT)COM099406100$50.8M1,806,5042.3%
Darling Ingredients Inc(DAR)COM237266101$46.1M1,278,8392.0%
Charles RIV Labs Intl Inc(CRL)COM159864107$37.5M165,8121.7%
Casella Waste SYS Inc(CWST)CL A147448104$35.2M630,1001.6%
Cadence Design System Inc(CDNS)COM127387108$33.1M310,6041.5%
Codexis Inc(CDXS)COM192005106$25.9M2,205,3081.1%
Align Technology Inc(ALGN)COM016255101$22.9M70,0411.0%
Caredx Inc(CDNA)COM14167L103$19.8M520,6150.9%
Agilysys Inc(AGYS)COM00847J105$19.4M803,8010.9%
Conmed Corp(CNMD)COM207410101$15.6M198,6080.7%
Curtiss Wright Corp(CW)COM231561101$14.9M159,5740.7%
Axogen Inc(AXGN)COM05463X106$14.8M1,269,0850.7%
Cryolife Inc(AORT)COM228903100$14.6M792,6300.6%
Centene Corp del(CNC)COM15135B101$14.3M245,8480.6%
Cavco Inds Inc del(CVCO)COM149568107$10.7M59,1290.5%
CNX RES Corp(CNX)COM12653C108$6.8M724,4630.3%
Alibaba Group Hldg LTD(BABA)SPONSORED ADS01609W102$4.2M14,3660.2%
Carmax Inc(KMX)COM143130102$2.0M21,8920.1%
Taiwan Semiconductor MFG LTD(TSM)SPONSORED ADS874039100$1.1M13,330,9530.0%
Spdr S&P 500 ETF TR(SPY)TR UNIT78462F103$621.4K1,855,6000.0%
Horizon Therapeutics PUB LSHSG46188101$454.7K5,853,2220.0%
Amazon COM Inc(AMZN)COM023135106$428.1K135,9470.0%
BWX Technologies Inc(BWXT)COM05605H100$423.0K7,512,2320.0%
Mercadolibre Inc(MELI)COM58733R102$373.1K344,7040.0%
TAL Education Group(TAL)SPONSORED ADS874080104$362.1K4,761,2250.0%
Canadian Natl RY Co(CNI)COM136375102$357.5K3,358,4250.0%
SEA LTD(SE)SPONSORD ADS81141R100$330.1K2,142,5720.0%
Grand Canyon ED Inc(LOPE)COM38526M106$324.2K4,055,1910.0%
Microsoft Corp(MSFT)COM594918104$309.0K1,468,9450.0%
Encompass Health Corp(EHC)COM29261A100$303.8K4,675,1560.0%
Nice LTD(NSY)SPONSORED ADR653656108$297.2K1,309,0330.0%
Lululemon Athletica Inc(LULU)COM550021109$277.8K843,5700.0%
Martin Marietta Matls Inc(MLM)COM573284106$276.9K1,176,4150.0%
Yandex N V(NBIS)SHS CLASS AN97284108$275.0K4,214,3630.0%
Trex Co Inc(TREX)COM89531P105$274.9K3,838,7270.0%
Alphabet Inc(GOOGL)CAP STK CL A02079K305$262.3K178,9490.0%
Irhythm Technologies Inc(IRTC)COM450056106$255.1K1,071,1820.0%
Pure Storage Inc(PSTG)CL A74624M102$248.3K16,133,0620.0%
Ritchie Bros Auctioneers(RBAGBP)COM767744105$247.5K4,177,3710.0%
Page 1 of 7Next