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William Blair Investment Management, LLC

Q4 2017 Holdings

Filed 2018-02-14 | 427 holdings | $1.7B | 13F-HR/A | View on SEC ↗ · Holdings Table ↗

Amended (2018-02-16) | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↓Shares% Portfolio
Alibaba Group Hldg LTD(BABA)SPONSORED ADS01609W102$916.6M5,316,18554.9%
Charles RIV Labs Intl Inc(CRL)COM159864107$154.0M1,406,7449.2%
Adobe SYS Inc(ADBE)COM00724F101$129.3M737,5777.7%
Align Technology Inc(ALGN)COM016255101$79.2M356,2524.7%
Carmax Inc(KMX)COM143130102$53.0M826,0583.2%
Biomarin Pharmaceutical Inc(BMRN)COM09061G101$51.5M577,6763.1%
Biogen Inc(BIIB)COM09062X103$46.7M146,6252.8%
Dana Incorporated(DAN)COM235825205$30.0M937,3821.8%
Boston Scientific Corp(BSX)COM101137107$25.2M1,017,8231.5%
Conmed Corp(CNMD)COM207410101$21.8M427,0081.3%
Darling Ingredients Inc(DAR)COM237266101$20.6M1,137,6951.2%
Cavco Inds Inc del(CVCO)COM149568107$20.3M133,2531.2%
Costco Whsl Corp New(COST)COM22160K105$17.7M95,1091.1%
Baozun Inc(BZUN)SPONSORED ADR06684L103$14.3M452,3840.9%
Blue Bird Corp(BLBD)COM095306106$13.6M685,3540.8%
Codexis Inc(CDXS)COM192005106$11.8M1,418,0630.7%
Boot Barn Hldgs Inc(BOOT)COM099406100$10.0M603,2550.6%
Cars COM Inc(CARS)COM14575E105$9.6M331,1520.6%
Cryolife Inc(AORT)COM228903100$7.0M365,3460.4%
Axogen Inc(AXGN)COM05463X106$5.1M179,5500.3%
Agilysys Inc(AGYS)COM00847J105$4.8M388,5180.3%
Apple Hospitality REIT Inc(APLE)COM NEW03784Y200$3.2M160,7340.2%
Cadence Design System Inc(CDNS)COM127387108$822.0K19,6630.0%
Taiwan Semiconductor MFG LTD(TSM)SPONSORED ADR874039100$689.0K17,377,3840.0%
Spdr S&P 500 ETF TR(SPY)TR UNIT78462F103$576.4K2,159,9200.0%
Copart Inc(CPRT)COM217204106$403.3K9,338,2230.0%
Canadian Natl RY Co(CNI)COM136375102$380.1K4,599,7780.0%
BWX Technologies Inc(BWXT)COM05605H100$346.5K5,727,9780.0%
Suncor Energy Inc New(SU)COM867224107$345.8K9,397,1220.0%
Costar Group Inc(CSGP)COM22160N109$338.5K1,140,0310.0%
SIX Flags Entmt Corp New(SIXEUR)COM83001A102$300.6K4,515,8440.0%
Ishares TR(IWD)RUS 1000 VAL ETF464287598$300.6K2,417,4500.0%
Dominos Pizza Inc(DPZ)COM25754A201$297.3K1,573,3330.0%
Toronto Dominion BK ONT(TD)COM NEW891160509$286.9K4,885,5910.0%
Credicorp LTD(BAP)COMG2519Y108$263.5K1,270,2070.0%
Booz Allen Hamilton Hldg COR(BAH)CL A099502106$258.3K6,774,2930.0%
Amazon COM Inc(AMZN)COM023135106$257.9K220,4880.0%
Affiliated Managers Group(AMG)COM008252108$252.8K1,231,4650.0%
Ball Corp(BALL)COM058498106$250.5K6,619,4040.0%
Middleby Corp(MIDD)COM596278101$248.1K1,838,7750.0%
Alphabet Inc(GOOGL)CAP STK CL A02079K305$238.1K226,0600.0%
Guidewire Software Inc(GWRE)COM40171V100$234.3K3,155,6800.0%
Microsoft Corp(MSFT)COM594918104$231.9K2,710,5050.0%
Zoetis Inc(ZTS)CL A98978V103$231.6K3,214,8320.0%
YUM China Hldgs Inc(YUMC)COM98850P109$224.6K5,611,5090.0%
Maximus Inc(MMS)COM577933104$224.0K3,129,9170.0%
Progressive Corp Ohio(PGR)COM743315103$217.8K3,867,0090.0%
Vail Resorts Inc(MTN)COM91879Q109$213.9K1,006,7910.0%
Unitedhealth Group Inc(UNH)COM91324P102$207.2K939,7400.0%
Hdfc Bank LTD(HDB)ADR REPS 3 SHS40415F101$204.2K2,008,2390.0%
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