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William Blair Investment Management, LLC

Q4 2018 Holdings

Filed 2019-02-13 | 404 holdings | $1.3B | 13F-HR | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↑Shares% Portfolio
Suncor Energy Inc New(SU)COM867224107$77.7K2,782,1180.0%
Lamb Weston Hldgs Inc(LW)COM513272104$78.0K1,060,5740.0%
Encore Cap Group Inc(ECPG)COM292554102$78.6K3,342,8530.0%
NU Skin Enterprises Inc(NUS)CL A67018T105$79.2K1,291,4660.0%
2U IncCOM90214J101$79.3K1,595,1460.0%
Axalta Coating SYS LTD(AXTA)COMG0750C108$79.4K3,388,3040.0%
Inogen Inc(INGN)COM45780L104$80.2K646,2630.0%
Worldpay Inc(WP)CL A981558109$80.5K1,053,8890.0%
Ishares Inc(IEMG)CORE MSCI EMKT46434G103$82.5K1,748,9000.0%
Penumbra Inc(PEN)COM70975L107$84.4K690,9020.0%
Raytheon Co(RTN1USD)COM NEW755111507$85.6K558,2760.0%
Yandex N V(NBIS)SHS CLASS AN97284108$88.6K3,238,5960.0%
Qiagen NV(QGEN)SHS NEWN72482123$89.1K2,586,0870.0%
Jones Lang Lasalle Inc(JLL)COM48020Q107$89.2K704,6730.0%
Intercontinental Exchange in(ICE)COM45866F104$91.1K1,209,3520.0%
Hilton Grand Vacations Inc(HGV)COM43283X105$94.4K3,575,9040.0%
Cambrex Corp(CBM)COM132011107$97.6K2,583,8190.0%
Weight Watchers Intl Inc NewCOM948626106$97.8K2,535,8240.0%
Aspen Technology Inc(AZPNUSD)COM045327103$98.3K1,196,3040.0%
Firstservice Corp NewSUB VTG SH33767E103$98.5K1,438,3100.0%
Trex Co Inc(TREX)COM89531P105$100.6K1,693,9110.0%
Ishares Inc(EWZ)MSCI BRAZIL ETF464286400$105.5K2,761,0000.0%
Fortinet Inc(FTNT)COM34959E109$107.5K1,526,5030.0%
Mastercard Incorporated(MA)CL A57636Q104$107.6K570,4390.0%
Genesee & WYO IncCL A371559105$109.6K1,481,1540.0%
Virtu Finl Inc(VIRT)CL A928254101$110.0K4,269,1070.0%
National Instrs CorpCOM636518102$110.4K2,433,1650.0%
Ritchie Bros Auctioneers(RBAGBP)COM767744105$114.0K3,485,5340.0%
Microsoft Corp(MSFT)COM594918104$115.6K1,138,5820.0%
Nice LTD(NSY)SPONSORED ADR653656108$119.4K1,103,7690.0%
WEX Inc(WEX)COM96208T104$119.5K853,4390.0%
Guidewire Software Inc(GWRE)COM40171V100$120.8K1,506,2330.0%
Huazhu Group LTD(HTHT)SPONSORED ADS44332N106$121.4K4,239,5100.0%
Catalent Inc(CTLTEUR)COM148806102$127.6K4,091,3570.0%
Sabre Corp(SABR)COM78573M104$128.5K5,938,7070.0%
J2 Global Inc(ZD)COM48123V102$129.6K1,868,3240.0%
Horizon Pharma PLCSHSG4617B105$130.4K6,672,7920.0%
Exact Sciences Corp(EXAS)COM30063P105$130.6K2,070,4320.0%
Ligand Pharmaceuticals Inc(LGND)COM NEW53220K504$132.6K977,2840.0%
Celanese Corp del(CE)COM150870103$133.2K1,480,8880.0%
Netease Inc(NTES)SPONSORED ADR64110W102$133.9K568,7380.0%
Firstcash IncCOM33767D105$137.8K1,904,5650.0%
Glaukos Corp(GKOS)COM377322102$138.0K2,456,0310.0%
Unitedhealth Group Inc(UNH)COM91324P102$138.7K556,6270.0%
Rogers Corp(ROG)COM775133101$142.8K1,441,6880.0%
Heico Corp New(HEI/A)CL A422806208$143.2K2,273,5280.0%
Insulet Corp(PODD)COM45784P101$147.1K1,854,1980.0%
Dexcom Inc(DXCM)COM252131107$150.4K1,255,6220.0%
SIX Flags Entmt Corp New(SIXEUR)COM83001A102$151.0K2,714,5610.0%
Godaddy Inc(GDDY)CL A380237107$153.4K2,337,3600.0%
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