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  Name: WILLIAM BLAIR INVESTMENT MANAGEMENT LLC
  City: Chicago
  State: IL
  Zip: 60606
   
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Portfolio Summary View Filing
  Filing Report Date : 2025-03-31
  Total Value : $35,621,647,000
  Total Value Change : $-5,318,015,000
  Securities Held Change : -10
   
All Securities Held : 423
  New Positions : 33
  Closed Positions : 46
  Increased Positions : 117
  Unchanged Positions : 4
  Decreased Positions : 269

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Holdings Found : 100     View All Holdings Currently Viewing:  ALL     Page 1 of 1
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Ticker Company Name Position
Rank
New/Closed
Postion
Last
Close
    Value Shares Held
% of
Portfolio
Value
Change
Change In
Shares Held
   % of Company    Industry
   (MSFT)1 Year Chart         MSFT Microsoft Corp 1 - $495.94 $1,549,311,000 4,127,203 4.35% -318,421,000 -303,951 0.055    Application Software
   (NVDA)1 Year Chart         NVDA NVIDIA Corporation 2 - $157.75 $1,321,980,000 12,197,638 3.71% -461,311,000 -1,081,767 0.05    Semiconductor - Speci...
   (TSM)1 Year Chart         TSM Taiwan Semiconductor Mfg. C... 3 - $228.57 $1,222,049,000 7,361,683 3.43% -302,878,000 -360,357 0.142    Semiconductor - Integ...
   (AMZN)1 Year Chart         AMZN Amazon.com Inc 4 - $223.30 $1,164,036,000 6,118,131 3.27% -335,384,000 -716,366 0.06    Internet Software & S...
   (AAPL)1 Year Chart         AAPL Apple Inc 5 - $201.08 $1,163,827,000 5,239,398 3.27% -114,439,000 134,908 0.031    Personal Computers
   (META)1 Year Chart         META Meta Platforms Inc 6 - $733.63 $906,170,000 1,572,230 2.54% -67,998,000 -91,564 0.065    Internet Service Prov...
   (MA)1 Year Chart         MA MasterCard Inc A 7 - $550.32 $666,138,000 1,215,314 1.87% -90,229,000 -221,090 0.123    Business Services
   (CG)1 Year Chart         CG The Carlyle Group Inc 8 - $31.75 $530,555,000 12,171,478 1.49% -138,435,000 -1,078,463 3.491    Cigarettes & Other To...
   (AVGO)1 Year Chart         AVGO Broadcom Limited 9 - $269.35 $515,486,000 3,078,817 1.45% 365,343,000 2,431,202 0.066    Semiconductor- Broad...
   (MELI)1 Year Chart         MELI Mercadolibre Inc 10 - $2,560.05 $498,578,000 255,567 1.4% 59,055,000 -2,909 0.512    Business Services
   (SE)1 Year Chart         SE Sea Limited 11 - $159.31 $479,942,000 3,678,011 1.35% 243,014,000 1,444,853 1.096    N/A
   (PRMB)1 Year Chart         PRMB Primo Brands Corp 12 - $29.35 $404,657,000 11,402,012 1.14% 61,206,000 240,142 3.622    N/A
   (CPRT)1 Year Chart         CPRT Copart Inc 13 - $48.18 $385,023,000 6,803,733 1.08% 2,150,000 132,309 0.709    Auto Dealerships
   (ORLY)1 Year Chart         ORLY O Reilly Automotive Inc 14 - $89.16 $370,800,000 258,834 1.04% 91,833,000 23,578 0.357    Auto Parts Stores
   (INTU)1 Year Chart         INTU Intuit Inc 15 - $776.57 $353,422,000 575,615 0.99% -13,359,000 -7,966 0.22    Application Software
   (CMG)1 Year Chart         CMG Chipotle Mexican Grill Inc 16 - $55.05 $341,546,000 6,802,345 0.96% -33,866,000 576,614 0.497    Restaurants
   (COST)1 Year Chart         COST Costco Wholesale Corp 17 - $985.14 $334,408,000 353,579 0.94% 25,455,000 16,394 0.08    Discount, Variety Stores
   (UNH)1 Year Chart         UNH Unitedhealth Group Inc 18 - $309.11 $327,355,000 625,021 0.92% -7,916,000 -37,754 0.066    Health Care Plans
   (LIN)1 Year Chart         LIN Linde Plc 19 - $463.79 $321,671,000 690,814 0.9% -90,888,000 -294,590 0.14    N/A
   (LRN)1 Year Chart         LRN Stride, Inc 20 - $23.84 $293,429,000 2,319,593 0.82% 37,032,000 -147,426 4.734    Publishing
   (NOW)1 Year Chart         NOW Servicenow, Inc. 21 - $1,022.42 $292,066,000 366,852 0.82% -136,409,000 -37,324 0.188    Information Technolog...
   (CRM)1 Year Chart         CRM Salesforce.com Inc 22 - $273.42 $290,816,000 1,083,678 0.82% -102,980,000 -94,188 0.119    Internet Software & S...
   (YUMC)1 Year Chart         YUMC Yum China Holdings, Inc. 23 - $44.67 $282,321,000 5,423,002 0.79% 38,420,000 359,670 1.293    N/A
   (BFAM)1 Year Chart         BFAM Bright Horizons Family Solu... 24 - $122.31 $280,898,000 2,211,097 0.79% 18,146,000 -159,239 3.471    Personal Services
   (TRU)1 Year Chart         TRU Transunion 25 - $87.26 $277,543,000 3,344,290 0.78% -34,958,000 -26,452 1.644    N/A
   (CHE)1 Year Chart         CHE Chemed Corp 26 - $559.36 $271,695,000 441,550 0.76% 20,823,000 -31,973 2.768    Consumer Services
   (IDXX)1 Year Chart         IDXX Idexx Laboratories Inc 27 - $531.32 $267,555,000 637,111 0.75% 93,028,000 214,978 0.747    Diagnostic Substances
   (DOCS)1 Year Chart         DOCS Doximity, Inc. 28 - $61.09 $266,037,000 4,584,467 0.75% -66,366,000 -1,641,466 2.469    N/A
   (RACE)1 Year Chart         RACE Ferrari NV 29 - $0.00 $258,071,000 603,138 0.72% 5,437,000 8,481 0.326    N/A
   (RE)1 Year Chart         RE Everest Re Group Ltd 30 - $336.78 $255,180,000 702,337 0.72% 22,186,000 59,524 0.78    Life & Health Insurance
   (BRP)1 Year Chart         BRP BRP Group Ord Shs Class A 31 - $42.70 $248,587,000 5,562,470 0.7% 58,369,000 654,881 8.335    N/A
   (CWST)1 Year Chart         CWST Casella Waste Systems Inc 32 - $115.31 $247,136,000 2,216,265 0.69% -32,255,000 -424,233 3.166    Waste Management
   (LRCX)1 Year Chart         LRCX Lam Research Corp 33 - $97.20 $241,646,000 3,323,880 0.68% -4,681,000 -86,440 0.258    Semiconductor Equipme...
   (DT)1 Year Chart         DT Dynatrace, Inc. 34 - $0.00 $238,677,000 5,062,075 0.67% -25,599,000 199,588 1.641    N/A
   (CWAN)1 Year Chart         CWAN Clearwater Analytics Holdin... 35 - $22.00 $236,903,000 8,839,660 0.67% -22,096,000 -571,646 4.04    N/A
   (SPOT)1 Year Chart         SPOT Spotify Technology SA 36 - $772.60 $236,732,000 430,398 0.66% 119,852,000 169,143 0.23    N/A
   (MRCY)1 Year Chart         MRCY Mercury Systems 37 - $53.41 $231,488,000 5,372,198 0.65% -38,681,000 -1,060,403 8.226    Communication Equipment
   (LYV)1 Year Chart         LYV Live Nation Inc 38 - $149.99 $231,199,000 1,770,553 0.65% -3,189,000 -39,396 0.81    Business Services
   (TLNE)1 Year Chart         TLNE Talen Energy Corp 39 - $297.88 $222,231,000 1,112,993 0.62% -17,753,000 -78,173 1.885    N/A
   (CFLT)1 Year Chart         CFLT Confluent, Inc. 40 - $24.47 $217,589,000 9,282,825 0.61% -84,370,000 -1,516,856 2.876    N/A
   (A)1 Year Chart         A Agilent Technologies Inc 41 - $119.17 $216,458,000 1,850,388 0.61% -6,589,000 190,069 0.599    Scientific & Technica...
   (UBER)1 Year Chart         UBER Uber Technologies, Inc 42 - $91.53 $212,365,000 2,914,700 0.6% -12,180,000 -807,871 0.166    N/A
   (MANH)1 Year Chart         MANH Manhattan Associates Inc 43 - $197.25 $207,650,000 1,200,011 0.58% 23,343,000 517,998 1.886    Technical & System So...
   (PANW)1 Year Chart         PANW Palo Alto Networks Inc 44 - $200.57 $203,010,000 1,189,698 0.57% -26,920,000 -73,931 0.396    Networking & Communic...
   (SN)1 Year Chart         SN SharkNinja, Inc 45 - $96.50 $191,645,000 2,297,628 0.54% -83,625,000 -529,712 1.653    N/A
   (BCO)1 Year Chart         BCO Brinks Co 46 - $89.10 $191,239,000 2,219,578 0.54% -24,328,000 -104,090 4.461    Security & Protection...
   (RY)1 Year Chart         RY Royal Bank of Canada (USA) 47 - $129.71 $188,620,000 1,674,195 0.53% 118,191,000 1,089,328 0.118    Foreign Money Center ...
   (EXLS)1 Year Chart         EXLS Exlservice Holdings, Inc. 48 - $43.82 $185,534,000 3,929,979 0.52% -43,114,000 -1,222,061 2.383    Business Services
   (BAM)1 Year Chart         BAM Brookfield Asset Management... 49 - $55.12 $181,935,000 3,755,118 0.51% -22,234,000 -12,532 0.911    Asset Management
   (FLUT)1 Year Chart         FLUT Flutter Entertainment plc 50 - $278.68 $179,624,000 810,760 0.5% 41,666,000 276,972 0.457    N/A
   (TYL)1 Year Chart         TYL Tyler Technologies Inc 51 - $581.10 $179,393,000 308,559 0.5% 173,147,000 297,728 0.767    Information Technolog...
   (MLI)1 Year Chart         MLI Mueller Industries Inc 52 - $79.60 $179,384,000 2,355,971 0.5% -21,992,000 -181,527 2.075    Metal Fabrication
   (HLS)1 Year Chart         HLS Encompass Health Corp 53 - $85.88 $178,604,000 1,763,468 0.5% 6,628,000 -98,751 1.794    Hospitals
   (PLNT)1 Year Chart         PLNT Planet Fitness, Inc. 54 - $108.70 $178,119,000 1,843,687 0.5% -21,917,000 -179,533 1.876    N/A
   (DDOG)1 Year Chart         DDOG Datadog, Inc. 55 - $0.00 $177,164,000 1,785,749 0.5% 4,001,000 573,887 0.694    N/A
   (INSM)1 Year Chart         INSM Insmed Inc 56 - $99.49 $176,475,000 2,313,217 0.5% 8,470,000 -120,226 1.217    Biotechnology
   (WAL)1 Year Chart         WAL Western Alliance Bancorpora... 57 - $77.62 $176,143,000 2,292,632 0.49% -38,184,000 -272,934 2.274    Domestic Regional Banks
   (CGNX)1 Year Chart         CGNX Cognex Corp 58 - $31.46 $166,984,000 5,597,851 0.47% -42,443,000 -242,266 3.206    Scientific & Technica...
   (GMED)1 Year Chart         GMED Genomed Inc 59 - $58.60 $166,441,000 2,273,787 0.47% 64,489,000 1,041,144 1.971    N/A
   (PODD)1 Year Chart         PODD Insulet Corp 60 - $173.42 $165,060,000 628,537 0.46% -11,504,000 -47,772 0.825    Medical Instruments &...
   (POOL)1 Year Chart         POOL Pool Corporation 61 - $292.77 $163,930,000 514,937 0.46% -24,767,000 -38,524 1.219    Wholesale, Other
   (FTAI)1 Year Chart         FTAI Fortress Transportation & I... 62 - $118.60 $158,215,000 1,424,978 0.44% -16,157,000 214,396 1.43    N/A
   (WAY)1 Year Chart         WAY Waystar Holding Corp. 63 New $39.76 $157,937,000 4,227,425 0.44% 157,937,000 4,227,425 2.537    N/A
   (QTWO)1 Year Chart         QTWO Q2 Holdings, Inc. 64 - $93.99 $157,395,000 1,967,187 0.44% -45,250,000 -46,181 3.05    N/A
   (ACVA)1 Year Chart         ACVA Acv Auctions Inc. 65 - $0.00 $156,074,000 11,076,909 0.44% -105,279,000 -1,022,777 6.649    N/A
   (CW)1 Year Chart         CW Curtiss Wright Corp 66 - $487.70 $153,943,000 485,212 0.43% 21,317,000 111,482 1.169    Aerospace/Defense Pro...
   (GTLS)1 Year Chart         GTLS Chart Industries Inc 67 - $167.81 $150,488,000 1,042,446 0.42% -58,076,000 -50,427 2.036    Scientific & Technica...
   (TWST)1 Year Chart         TWST Twist Bioscience Corp 68 - $0.00 $149,458,000 3,806,867 0.42% 12,384,000 857,144 5.487    N/A
   (WSC)1 Year Chart         WSC Willscot Mobile Mini Holdin... 69 - $28.38 $146,844,000 5,282,161 0.41% -38,987,000 -273,320 2.32    N/A
   (VEEV)1 Year Chart         VEEV Veeva Systems Inc 70 - $283.41 $145,531,000 628,291 0.41% -21,892,000 -168,013 0.465    Healthcare Informatio...
   (ELF)1 Year Chart         ELF E L F Beauty Inc 71 - $126.33 $143,013,000 2,277,639 0.4% -146,424,000 -27,710 4.103    N/A
   (MLM)1 Year Chart         MLM Martin Marietta Materials Inc 72 - $550.05 $139,974,000 292,752 0.39% -86,357,000 -145,450 0.331    General Building Mate...
   (CCJ)1 Year Chart         CCJ Cameco Corporation (USA) 73 - $73.27 $138,406,000 3,362,624 0.39% -70,255,000 -697,727 0.849    Industrial Metals & M...
   (ACHC)1 Year Chart         ACHC Acadia Healthcare Company Inc 74 - $73.18 $133,364,000 4,398,555 0.37% -10,488,000 770,512 4.439    N/A
   (APO)1 Year Chart         APO Apollo Global Management LLC 75 - $142.92 $129,436,000 945,205 0.36% -101,682,000 -454,155 0.158    Diversified Investments
   (MNST)1 Year Chart         MNST Monster Beverage Corporation 76 - $61.71 $128,720,000 2,199,595 0.36% -63,274,000 -1,453,258 0.31    Beverage Soft Drinks...
   (PCTY)1 Year Chart         PCTY Paylocity Holding Corp 77 New $179.56 $128,704,000 687,005 0.36% 128,704,000 687,005 1.266    N/A
   (BPMC)1 Year Chart         BPMC Blueprint Medicines Corp 78 - $128.11 $126,540,000 1,429,668 0.36% -43,076,000 -515,027 2.166    N/A
   (LANC)1 Year Chart         LANC Lancaster Colony Corp 79 - $171.80 $126,053,000 720,305 0.35% -19,102,000 -118,063 2.615    Housewares & Accessories
   (ONB)1 Year Chart         ONB Old National Bancorp 81 - $21.37 $124,866,000 5,892,673 0.35% 5,630,000 399,183 2.011    Domestic Regional Banks
   (AZEK)1 Year Chart         AZEK Azek Co Inc. 82 - $0.00 $123,110,000 2,518,105 0.35% -38,636,000 -889,224 1.477    N/A
   (CIEN)1 Year Chart         CIEN Ciena Corp 83 New $82.12 $121,200,000 2,005,631 0.34% 121,200,000 2,005,631 1.3    Systems, Products & D...
   (FOLD)1 Year Chart         FOLD Amicus Therapeutics Inc 84 - $10.61 $120,594,000 14,778,651 0.34% -26,336,000 -819,047 4.344    Biotechnology
   (NFE)1 Year Chart         NFE New Fortress Energy Llc 85 - $2.50 $120,567,000 14,508,626 0.34% -114,807,000 -1,058,429 8.598    N/A
   (NOVT)1 Year Chart         NOVT Novanta Inc 86 - $130.00 $118,777,000 928,888 0.33% -30,302,000 -46,953 2.603    Scientific & Technica...
   (EPAM)1 Year Chart         EPAM Epam Systems, Inc. 87 - $174.93 $117,599,000 696,511 0.33% -49,307,000 -17,313 1.244    Information Technolog...
   (NEOG)1 Year Chart         NEOG Neogen Corp 88 - $4.73 $117,556,000 13,558,932 0.33% -56,614,000 -787,827 5.693    Diagnostic Substances
   (IBN)1 Year Chart         IBN ICICI Bank Limited (ADR) 89 - $33.87 $117,182,000 3,717,585 0.33% 10,004,000 127,910 0.108    Foreign Money Center ...
   (MDGL)1 Year Chart         MDGL Madrigal Pharmaceuticals Inc 90 - $300.75 $116,976,000 353,155 0.33% 2,259,000 -18,616 1.374    Diagnostic Substances
   (INSP)1 Year Chart         INSP Inspire Medical Systems Inc 91 - $132.41 $110,368,000 692,918 0.31% -56,958,000 -209,693 2.028    N/A
   (WMS)1 Year Chart         WMS Advanced Drainage Systems, ... 92 - $115.97 $110,090,000 1,013,255 0.31% -10,145,000 -26,844 1.438    N/A
   (NICE)1 Year Chart         NICE NICE Systems Ltd (ADR) 93 - $165.09 $109,565,000 710,666 0.31% -53,258,000 -248,067 1.133    Computer Peripherals
   (GWRE)1 Year Chart         GWRE Guidewire Software, Inc. 94 - $235.40 $108,278,000 577,914 0.3% 2,517,000 -49,447 0.69    Business Software & S...
   (TEAM)1 Year Chart         TEAM Atlassian Corporation Plc 95 New $202.32 $107,280,000 505,536 0.3% 107,280,000 505,536 0.337    N/A
   (ITUB)1 Year Chart         ITUB Banco Itau Holding Financei... 96 - $6.62 $106,027,000 19,276,152 0.3% 36,105,000 5,178,013 0.198    Foreign Money Center ...
   (CHDN)1 Year Chart         CHDN Churchill Downs Inc 97 - $100.95 $105,485,000 949,715 0.3% -32,451,000 -83,205 1.273    Gambling/Resorts
   (FRPT)1 Year Chart         FRPT Freshpet, Inc. 98 - $68.39 $105,310,000 1,266,200 0.3% -26,007,000 379,582 2.063    N/A
   (WGS)1 Year Chart         WGS GeneDx Holdings Corp 99 - $91.10 $105,303,000 1,188,988 0.3% 53,807,000 518,993 4.646    N/A
   (PSTG)1 Year Chart         PSTG Pure Storage, Inc. 100 - $55.40 $102,465,000 2,314,536 0.29% -52,659,000 -210,672 0.712    N/A
   (ACN)1 Year Chart         ACN Accenture Plc 101 - $295.46 $97,362,000 312,019 0.27% -233,118,000 -627,404 0.049    Management Services

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