William Blair Investment Management, LLC

Most recent update: Sept. 30, 2017

CompanyShares/WarrantsValue ($000)
Alibaba Group Holding Limited6,399,0931,105,187
Taiwan Semiconductor Manufacturing Company Limited19,563,258734,600
Canadian National Railway Company4,684,710387,329
CoStar Group1,393,304373,754
BWX Technologies6,391,978358,079
Alphabet Holding Company, Inc.368,003357,440
SBA Communications Corporation2,467,432355,434
Copart10,166,845349,434
Vantiv4,904,219345,600
S&P Quality Rankings Glbl Equ Mngd Tr1,368,924343,915
Suncor Energy Inc.9,758,860341,227
Six Flags Entertainment Corporation New5,411,196329,758
Check Point Software Technologies Ltd.2,698,562307,690
Guidewire Software3,911,540304,553
Ballroom Dance Fitness Inc7,347,203303,439
Vail Resorts1,326,702302,647
Credicorp Ltd.1,451,434297,573
Russell Exchange Traded Funds Trust Russell Small Cap Consiste2,483,200294,284
Redux Holdings, Inc.2,612,755289,650
Affiliated Managers Group1,519,372288,422
Booz Allen Hamilton Holding Corporation7,554,477282,462
Zoetis4,427,987282,328
Centenera Mng Corp.2,881,488278,842
Amazon.com287,657276,539
Microsoft Corporation3,629,113270,333
Hawaiian Telcom Holdco, Inc.2,794,700269,325
Mastercard Incorporated1,761,444248,716
The Middleby Corporation1,939,553248,593
Progressive Corporation (The)5,005,580242,370
Ctrip.com International4,544,373239,670
Align Technology1,266,308235,875
Jumbo SA3,178,302234,813
Facebook1,354,480231,440
Verisk Analytics2,676,421222,651
United States Cellular Corporation1,134,977222,285
Maximus3,374,826217,676
Arista Networks, Inc.1,085,510205,824
HealthSonix, Inc.4,247,497196,871
CSRA Inc.6,048,003195,169
Grand Canyon Education2,088,949189,718
Yum China Holdings, Inc.4,699,192187,827
Takeuchi Manufacturing Co., Ltd.1,809,200184,955
Domino's Pizza Inc858,919170,538
Tesco PLC2,672,343169,133
Union Pacific Corporation1,443,612167,416
Veeva Systems2,917,890164,598
Tallgrass Energy Partners, LP4,834,438162,969
NetEase607,443160,250
IntercontinentalExchange2,327,345159,889
ABIOMED944,861159,304
Ligand Pharmaceuticals Incorporated1,147,376156,215
Yandex N.V.4,629,740152,550
East West Bancorp2,549,489152,408
Socket Mobile, Inc.2,724,430151,642
Mettler-Toledo International230,599144,392
Adobe Systems Incorporated965,941144,099
Old Dominion Freight Line1,296,365142,743
Starbucks Corporation2,610,402140,205
Companhia de Bebidas das Americas - AmBev21,186,208139,617
Brookfield Real Estate Services3,364,770138,965
2U, Inc.2,439,160136,691
Live Nation Entertainment3,045,589132,635
Home Depot808,980132,317
Fortive Corp1,859,227131,615
Cooper Companies546,907129,677
Raytheon Company687,704128,312
Ross Stores1,986,741128,284
Adtalem Global Education3,551,026127,304
Heico Corporation1,654,834126,098
Celanese Corporation1,205,985125,748
Rogers Communications, Inc.2,429,600124,991
Axalta Coating Systems Ltd.4,318,090124,879
Martin Marietta Materials595,756122,863
EXACT Sciences Corporation2,566,007120,910
Bank of the Ozarks2,494,365119,854
National Instruments Corporation2,841,867119,842
Ryanair Holdings Plc1,116,925117,746
The Cash Store Financial Services Inc.2,067,541116,195
Equifax1,083,903114,883
Yelp Inc.2,620,999113,489
MercadoLibre434,926112,615
Michaels Stores Inc5,184,860111,319
MaxLinear4,626,258109,874
STERLING CONSOLIDATED Corp1,949,361107,702
Texas Instruments Incorporated1,186,235106,334
Hanesbrands Inc.4,304,276106,057
Encore Capital Group Inc2,389,041105,835
Hexcel Corporation1,828,283104,980
Universal Electronics Inc.1,639,526103,946
Acadia Healthcare Company2,139,935102,203
Horizon Pharma7,867,66599,762
CBOE Holdings911,72398,129
Fomento Economico Mexicano S.A.B. de C.V.1,026,84098,094
Concho Resources Inc.738,02897,213
iShares MSCI Europe Financials Sector Index Fund2,589,35096,590
Newell Rubbermaid Inc.2,239,36595,554
Cambrex Corporation1,732,93495,311
Carmax Mining Corp.1,245,72994,439
China Lodging Group793,67194,304
Danaher Corporation1,094,07493,850
SiteOne Landscape Supply, Inc.1,593,42192,578
BioMarin Pharmaceutical Inc.990,26192,164
Jones Lang LaSalle Incorporated743,01791,763
Estee Lauder Companies838,95890,473
Dun & Bradstreet Corporation (The)737,45585,847
West Pharmaceutical Services888,76185,552
Euronet Worldwide882,78483,679
FirstService1,271,89283,589
Coherent350,34182,390
Westinghouse Air Brake Technologies Corporation1,084,78282,172
Toro Company (The)1,317,08281,738
Weibo793,04078,463
Russell Exchange Traded Funds Trust Russell Small Cap Aggressi615,90077,024
NewLead Holdings Ltd.865,77076,413
Accenture plc.553,32174,737
BlackRock162,88072,822
Indianapolis Power & Light Co.2,198,20072,211
Xylem Inc.1,130,88170,827
Vulcan Materials Company587,91570,315
Banco Popular2,347,61969,748
Dex One Corporation1,418,32569,392
Costco Wholesale Corporation421,59469,264
J P Morgan Chase & Co719,90968,759
Diamondback Energy682,49866,858
Illini Corp.545,90066,179
Cemex S.A.B. de C.V.7,140,40764,835
ICON plc556,29663,351
Hilton Grand Vacations1,584,35561,204
GLAUKOS Corp1,841,99160,786
Virtu Financial3,691,24559,798
Cable One, Inc.82,11759,298
Honeywell International Inc.387,09754,867
Boeing Company (The)212,92754,128
Nu Skin Enterprises879,80254,090
ENERGY TRANSFER PARTNERS780,40053,442
Colliers International Group1,046,42652,007
Fifth Third Bancorp1,836,78051,393
OM Asset Management plc3,405,17650,805
Banco Macro S.A.431,19950,601
Goldman Sachs Group209,76349,754
BROADVIEW INSTITUTE INC204,63749,633
Acxiom Corporation2,007,39149,462
USD Partners LP423,10049,257
Thermo Fisher Scientific Inc257,83148,782
Selective Insurance Group909,70048,260
Biogen Idec Inc.151,33647,386
Microchip Technology Incorporated524,11147,055
The Ultimate Software Group236,13944,772
Transdigm Group Incorporated173,12944,260
Boston Scientific Corporation1,513,56344,151
Intuit Inc.300,75142,749
Americas Silver Corporation1,063,06242,267
Envestnet430,03941,602
Sina Corporation356,98740,929
Repligen Corporation1,059,93540,617
Carnival Plc ADS617,68139,884
Grupo Aeroportuario del Sureste204,32138,989
Schlumberger N.V.552,82238,565
Glacier Bancorp1,019,63138,501
Watsco235,43237,921
PPG Industries343,56237,331
Copa Holdings291,78036,335
Cerner Corporation506,12736,097
Nike693,33035,949
IDEXX Laboratories228,36635,509
Lamprell189,89235,138
Netflix188,90434,258
Steven Madden766,56433,192
Interface Inc.1,472,73532,253
Canadian Natural Resources Limited963,62532,209
Inphi Corporation809,72232,138
Brady Corporation845,72632,095
Selective Insurance Group589,58431,749
Shoprite Holdings Ltd.271,04531,574
Radiant Creations Group, Inc.1,679,00631,381
Salesforce.com Inc327,22030,569
Dana Holding Corporation1,084,04730,310
SPDR GOLD TRUST800,10029,860
MakeMyTrip Limited1,035,20729,762
Hancock Holding Company594,38628,798
Carrizo Oil & Gas1,673,88528,674
Wolverine World Wide968,83527,951
FNB United Corp.1,984,85527,848
WSFS Financial Corporation570,71527,822
ICICI Bank Limited3,232,75827,672
Terra Nitrogen Company612,62327,580
Orbotech Ltd.649,68327,423
Fastenal Company598,76927,292
Belden Inc338,28727,242
ONE Gas366,23426,969
Continental Building Products1,019,47226,506
The Hanover Insurance Group272,46726,410
CoBiz Financial Inc.1,332,04126,161
Pampa Energia S.A.401,09226,111
iBrands Corp.626,04026,100
Integer Holdings Corporation509,61326,067
Baozun779,37725,532
Western Alliance Bancorporation478,09025,377
IDACORP287,39925,271
Global Profit Technologies, Inc.2,650,50025,074
iShares S&P Global Nuclear Index Fund735,60025,003
Terreno Realty Corporation686,82924,849
ADTRAN1,029,38524,705
Allergan116,37823,852
Chesapeake Utilities Corporation303,18123,724
First American Minnesota Municipal Income Fund II474,52923,712
IBERIABANK Corporation287,82523,645
J & J Snack Foods Corp.179,69123,593
PUBLIC SERVICE CO OF COLORADO583,88423,531
Prosperity Bancshares357,74323,514
Renasant Corporation547,07223,469
Silicon Motion Technology Corporation487,83623,431
Line Up Advertisement, Inc.637,42223,075
Banner Corporation374,20522,931
Financial Institutions879,20022,736
CNO Financial Group972,93222,708
CONMED Corporation431,95722,665
Pebblebrook Hotel Trust619,64422,394
Boston Private Financial Holdings1,350,35122,348
Umpqua Holdings Corporation1,139,91622,240
Cavco Industries150,40122,192
Acadia Realty Trust774,56922,168
TopBuild Corp337,30721,982
The Intertain Group Limited185,05021,864
LaSalle Hotel Properties752,08521,826
Standex International Corporation202,51621,507
Home BancShares850,74621,456
Healthcare Realty Trust Incorporated657,86521,275
Archrock1,663,94520,883
Kadant Inc211,24520,818
Magellan Health Services240,17820,727
EMCOR Group298,69920,724
Education Realty Trust Inc.574,59620,645
Bitauto Holdings Limited460,50020,575
Sterling Bancorp831,04420,485
LAUREATE EDUCATION, INC.1,405,12920,445
American Assets Trust511,14820,328
Bristol-Myers Squibb Company318,88020,325
Darling International Inc.1,153,62120,211
Churchill Downs97,25020,053
Sensient Technologies Corporation259,53119,963
Oasis Petroleum Inc.2,164,85219,743
Minerals Technologies Inc.276,44219,531
Sandy Spring Bancorp470,87719,513
Green Bancorp, Inc.824,37019,496
MOPALS.COM, INC.608,39319,067
Seacoast Banking Corporation of Florida795,65519,008
Highwoods Properties361,71418,842
Agree Realty Corporation382,45918,771
ESCO Technologies Inc.312,79218,752
Signature Bank146,31418,734
Lydall325,77418,667
OceanFirst Financial Corp.679,03818,667
CMG HOLDINGS GROUP, INC.60,42618,601
PolyOne Corporation456,02018,254
National Bank of Canada 509,74818,193
Prologis, Inc.284,44518,051
WisdomTree Trust WisdomTree Emerging Markets Corporate Bond Fu716,88218,044
Equity Commonwealth593,10018,030
PDC Energy363,90917,842
HudBay Minerals Inc2,411,04617,832
Meredith Corporation321,19317,826
Eldorado Artesian Springs, Inc.461,20017,798
RSP Permian514,21417,787
CIRCOR International326,70017,782
Edwards Lifesciences Corporation159,46217,431
Enerplus Corporation1,753,78017,270
Carpenter Technology Corporation358,27817,208
Grupo De Inversiones Suramericana S.A.691,45017,072
CVB Financial Corporation703,69517,008
Meta Financial Group215,27316,877
Silgan Holdings546,55116,085
Pioneer Exploration, Inc.108,87616,064
Southwest Airlines Company286,03516,012
Grupo Financiero Galicia S.A.310,08015,982
Spartan Stores600,49915,835
Range Energy Resources, Inc.775,50015,177
Newpark Resources1,503,72515,037
Herbalife LTD.221,17515,002
Douglas Dynamics377,27814,865
Cincinnati Bell Inc736,65214,623
Golden Valley Bank (Chico, CA)597,19514,560
Gentherm Inc385,88914,336
Shire plc92,55414,174
Blue Bird Corporation667,56313,752
Northwest Pipe Company721,62613,725
LHC Group189,09713,411
Varonis315,25913,209
Analogic Corporation156,49613,107
REAL HIP-HOP NETWORK, INC324,24012,937
Lithia Motors105,73912,721
Exterran Corp392,80012,416
Neogenomics Inc.1,109,64412,350
BofI Holding423,25112,050
Armstrong Flooring, Inc.232,72211,927
51job173,55210,519
American Campus Communities Inc237,59010,490
Primo Water Corporation883,26710,467
Mercury Computer Systems195,39010,137
Atlantic Alliance Partnership Corp.442,60910,109
Codexis1,513,44410,064
BHP Billiton Limited246,0079,971
MGP Ingredients159,3999,664
CryoLife423,8879,622
Helix TCS, Inc.1,283,6409,486
USA Technologies1,509,3619,434
NVR3,3009,422
Q2 Holdings224,8819,366
Global X Funds Global X NASDAQ 500 ETF292,2009,292
Littelfuse47,2999,265
NutriSystem Inc161,0089,000
Imax Corporation390,5968,847
Entellus Medical451,6898,338
Cowen Group, Inc.458,3088,158
WNS (Holdings) Limited218,4837,975
Calavo Growers108,2997,927
Supernus Pharmaceuticals191,7367,669
ICF International137,5267,420
U.S. Auto Parts Network2,481,0337,170
Albany International Corporation123,9467,115
John Bean Technologies Corporation70,2737,105
Compania Cervecerias Unidas527,6496,749
Deoleo SA49,2576,508
Prudential Public Limited Company133,1036,377
Transportadora De Gas Sa Ord B310,6396,309
Willdan Group193,7926,290
Boot Barn Holdings, Inc.699,8986,229
Unilever NV105,3286,219
EPAM Systems70,2716,179
ORBCOMM Inc.568,7485,955
Novo Nordisk A/S120,3985,797
Team423,9745,660
Relx250,2715,594
Cars.com Inc.204,9135,453
ABB Ltd214,0695,298
CARVANA CO.357,2705,245
Simulations Plus338,1065,241
Callon Petroleum Company465,1125,228
Magna International97,2685,192
Bridgepoint Education536,5945,151
YPF Sociedad Anonima230,9295,145
Orix Corp Ads62,9965,099
Astrazeneca PLC146,5274,964
Royal Dutch Shell PLC81,3884,930
Charles River Laboratories International45,1184,874
FMC Corporation51,9164,637
IRSA Inversiones Y Representaciones S.A.188,8544,636
Royal Kpn N.V.59,6904,617
Agilysys374,5144,475
National Retail Properties102,5834,274
Fresenius Medical Care Corporation86,4724,228
Novartis AG48,1104,130
Banco de Guayaquil SA291,4263,993
Albero Corp.27,8813,800
Lennox International21,1273,781
Anheuser-Busch Inbev SA31,1503,716
Sappi Limited32,6193,577
Arthur J. Gallagher & Co.56,8393,498
Grifols158,2283,464
A-Mark Precious Metals, Inc.205,7313,397
Civeo Corp1,186,2863,381
OBALON THERAPEUTICS INC345,3253,291
Etsy192,2253,245
Thomson Reuters Corp70,6303,241
Gulfport Energy Corporation224,8083,224
Sumitomo Mitsui Financial Group Inc416,9803,215
Fulgent Genetics, Inc.629,5403,015
Apple Green Holding, Inc.156,0332,951
Douglas Emmett74,0212,918
Rio Tinto56,2792,656
Arcos Dorados Holdings Inc.256,7532,580
Vanguard Natural Resources, LLC20,8762,483
Collectors Universe102,9982,469
Roper Technologies9,8662,401
Intuitive Surgical2,1612,260
Tanger Factory Outlet Centers88,7932,168
Columbia Banking System50,0102,106
Rogers Corporation15,2992,039
YogaWorks, Inc.717,2441,987
Universal Forest Products19,9001,953
DENTSPLY International Inc.30,8411,845
Energen Corporation31,5881,727
Telecom Argentina Stet - France Telecom S.A.55,9441,725
Entertainment Arts Research, Inc.23,5371,641
ONYX Pharmaceuticals6,9671,500
Adecoagro S.A.136,9391,479
Wheaton Precious Metals62,7401,198
E*TRADE Financial Corporation26,0561,136
Globant27,0971,086
Empresa Distribuidora Y Comercializadora Norte S.A. (Edenor)27,2561,083
iShares Trust6,0401,081
Owens Corning Inc13,5331,047
lululemon athletica inc.15,246949
Thor Industries7,495944
Fortune Brands Home & Security13,973939
Pinnacle West Capital Corporation11,051934
Dunkin' Brands Group17,236915
Atmos Energy Corporation10,674895
Community Svgs Bancorp Inc34,122873
PacWest Bancorp17,239871
BBVA Banco Frances S.A.42,142859
ManpowerGroup7,201848
Zions Bancorporation17,949847
CommScope Holding Company, Inc.25,386843
Cadence Design Systems21,175836
Spirit Aerosystems Holdings10,649828
Omega Flex11,042793
Cresud S.A.C.I.F. y A.41,200769
Performance Sports Group11,114767
Lamb Weston Holdings, Inc.15,937747
Parsley Energy28,125741
CornerWorld Corp.6,128739
Mid-America Apartment Communities6,824729
SVB Financial Group3,829716
Steel Partners Holdings LP20,216697
Patterson-UTI Energy31,444658
Flow International Corporation14,445615
Hologic15,969586
American Financial Group5,494568
Mednax11,328488
Select Asset Inc.3,957323
Sanofi5,738286

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