HoldingsChannel.com
William Blair Investment Management LLC Top Holdings
As of  03/31/2020

   EntityAmountChange
 12/31/2019 to 03/31/2020
Position Size
($ in 1000's)
ALIBABA GROUP HLDG LTD 5,597,636 -74,107 $1,089,396
     BABA5,597,636-74,107$1,089,396
TAIWAN SEMICONDUCTOR MFG LTD 17,319,235 -20,308 $828,312
     TSM17,319,235-20,308$828,312
SPDR S&P 500 ETF TR (SPY) 2,141,600 -105,700 $551,997
     SPY2,141,600-105,700$551,997
NETEASE INC 1,200,333 +234,940 $385,447
     NTES1,200,333+234,940$385,447
BWX TECHNOLOGIES INC 7,772,185 +414,203 $378,583
     BWXT7,772,185+414,203$378,583
TAL EDUCATION GROUP 6,268,554 +4,169,598 $334,019
     TAL6,268,554+4,169,598$334,019
GRAND CANYON ED INC 4,093,884 +1,226,697 $312,302
     LOPE4,093,884+1,226,697$312,302
ENCOMPASS HEALTH CORP 4,558,487 -409,795 $291,880
     EHC4,558,487-409,795$291,880
AMAZON COM INC 130,797 +224 $255,018
     AMZN130,797+224$255,018
TREX CO INC 3,091,842 -692,309 $247,780
     TREX3,091,842-692,309$247,780
CANADIAN NATL RY CO 3,166,827 -176,128 $247,692
     CNI3,166,827-176,128$247,692
HORIZON THERAPEUTICS PUB LTD 8,319,945 -535,545 $246,437
     HZNP8,319,945-535,545$246,437
TELEDYNE TECHNOLOGIES INC 818,722 +36,203 $243,381
     TDY818,722+36,203$243,381
COPART INC 3,360,955 +1,182,780 $230,293
     CPRT3,360,955+1,182,780$230,293
BJS WHSL CLUB HLDGS INC 9,009,516 -475,768 $229,472
     BJ9,009,516-475,768$229,472
LIVE NATION ENTERTAINMENT IN 4,843,156 +754,785 $220,170
     LYV4,843,156+754,785$220,170
BROOKFIELD ASSET MGMT INC 4,956,585 -2,206,308 $219,329
     BAM4,956,585-2,206,308$219,329
MARTIN MARIETTA MATLS INC 1,139,759 +101,312 $215,677
     MLM1,139,759+101,312$215,677
NICE LTD 1,446,358 +180,565 $207,694
     NICE1,446,358+180,565$207,694
TELEFLEX INCORPORATED 702,708 +15,725 $205,795
     TFX702,708+15,725$205,795
PENUMBRA INC 1,266,233 +48,046 $204,281
     PEN1,266,233+48,046$204,281
BRINKS CO 3,887,833 +1,581,779 $202,362
     BCO3,887,833+1,581,779$202,362
CABLE ONE INC 122,952 -7,381 $202,134
     CABO122,952-7,381$202,134
PURE STORAGE INC 16,178,671 +634,991 $198,998
     PSTG16,178,671+634,991$198,998
ALPHABET INC 169,270 -1,179 $196,683
     GOOGL169,270-1,179$196,683
J2 GLOBAL INC 2,590,038 +119,082 $193,864
     JCOM2,590,038+119,082$193,864
MICROSOFT CORP 1,207,778 -3,237 $190,479
     MSFT1,207,778-3,237$190,479
BOOZ ALLEN HAMILTON HLDG COR 2,766,936 +52,031 $189,922
     BAH2,766,936+52,031$189,922
CROWN HLDGS INC 3,200,458 +116,581 $185,755
     CCK3,200,458+116,581$185,755
AMEDISYS INC 970,033 -100,121 $178,040
     AMED970,033-100,121$178,040
ZYNGA INC 25,282,591 +2,420,715 $173,186
     ZNGA25,282,591+2,420,715$173,186
STERIS PLC 1,225,732 +157,035 $171,566
     STE1,225,732+157,035$171,566
VIRTU FINL INC 8,130,622 +15,650 $169,280
     VIRT8,130,622+15,650$169,280
LULULEMON ATHLETICA INC 851,079 +247,739 $161,322
     LULU851,079+247,739$161,322
LAMB WESTON HLDGS INC 2,768,374 -661,994 $158,074
     LW2,768,374-661,994$158,074
UNITEDHEALTH GROUP INC 632,925 -9,511 $157,839
     UNH632,925-9,511$157,839
GODADDY INC 2,720,994 -8,632 $155,396
     GDDY2,720,994-8,632$155,396
BURLINGTON STORES INC 977,093 -489,899 $154,830
     BURL977,093-489,899$154,830
MERCURY SYS INC 2,150,709 +1,886,864 $153,432
     MRCY2,150,709+1,886,864$153,432
FIRSTCASH INC 2,113,052 +74,056 $151,590
     FCFS2,113,052+74,056$151,590
ASPEN TECHNOLOGY INC 1,570,625 +75,132 $149,319
     AZPN1,570,625+75,132$149,319
INSULET CORP 895,609 -705,415 $148,384
     PODD895,609-705,415$148,384
MASTERCARD INC 607,702 +56,269 $146,796
     MA607,702+56,269$146,796
YANDEX N V 4,286,901 +1,389,354 $145,969
     YNDX4,286,901+1,389,354$145,969
MASIMO CORP 804,330 +804,330 $142,463
     MASI804,330+804,330$142,463
HUAZHU GROUP LTD 4,934,522 +384,428 $141,921
     HTHT4,934,522+384,428$141,921
HEALTHCARE SVCS GROUP INC 5,776,034 +94,442 $138,105
     HCSG5,776,034+94,442$138,105
EURONET WORLDWIDE INC 1,604,366 -462,834 $137,526
     EEFT1,604,366-462,834$137,526
TRANSUNION 1,988,311 -559,628 $131,586
     TRU1,988,311-559,628$131,586
RITCHIE BROS AUCTIONEERS 3,740,272 +102,239 $127,842
     RBA3,740,272+102,239$127,842

See Full List: All Stocks Held By William Blair Investment Management LLC
— Including:
     • Biggest new positions
     • Biggest exits
     • Biggest increased positions
     • Biggest decreased positions

See Details: Top 10 Stocks Held By William Blair Investment Management LLC

Size ($ in 1000's)
At 03/31/2020: $20,547,647
At 12/31/2019: $25,094,282

William Blair Investment Management LLC holdings changes, total fund size, and other information presented on HoldingsChannel.com was derived from William Blair Investment Management LLC 13F filings. Link to 13F filings: SEC filings

William Blair Investment Management LLC Top Holdings 13F Filings | www.HoldingsChannel.com

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