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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 : 2023-12-31
  Total Value : $34,363,331,000
  Total Value Change : $4,270,265,000
  Securities Held Change : 8
   
All Securities Held : 406
  New Positions : 29
  Closed Positions : 27
  Increased Positions : 133
  Unchanged Positions : 0
  Decreased Positions : 244

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Holdings Found : 100     View All Holdings Currently Viewing:  Increased Positions     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 - $410.54 $1,474,977,000 3,922,394 4.29% 274,288,000 119,738 0.052    Application Software
   (GOOGL)1 Year Chart         GOOGL Alphabet Inc 3 - $169.38 $977,510,000 6,997,711 2.84% 122,566,000 464,435 0.117    Search Engines & Info...
   (AMZN)1 Year Chart         AMZN Amazon.com Inc 4 - $188.00 $877,946,000 5,778,239 2.55% 184,855,000 325,984 0.057    Internet Software & S...
   (MA)1 Year Chart         MA MasterCard Inc A 6 - $454.77 $575,154,000 1,348,512 1.67% 67,904,000 67,287 0.136    Business Services
   (NVDA)1 Year Chart         NVDA NVIDIA Corporation 7 - $904.12 $536,984,000 1,084,335 1.56% 112,945,000 109,511 0.044    Semiconductor - Speci...
   (CG)1 Year Chart         CG The Carlyle Group Inc 9 - $31.75 $451,569,000 11,097,795 1.31% 183,826,000 2,220,367 3.183    Cigarettes & Other To...
   (ACN)1 Year Chart         ACN Accenture Plc 15 - $311.99 $334,042,000 951,930 0.97% 58,575,000 54,964 0.15    Management Services
   (CRM)1 Year Chart         CRM Salesforce.com Inc 16 - $278.97 $329,054,000 1,250,490 0.96% 80,711,000 25,799 0.137    Internet Software & S...
   (ICLR)1 Year Chart         ICLR ICON plc (ADR) 17 - $311.75 $323,943,000 1,144,393 0.94% 67,064,000 101,228 1.438    Research Services
   (INTU)1 Year Chart         INTU Intuit Inc 18 - $632.43 $304,049,000 486,455 0.88% 65,945,000 20,443 0.186    Application Software
   (LYV)1 Year Chart         LYV Live Nation Inc 19 - $95.79 $303,714,000 3,244,811 0.88% 81,856,000 573,108 1.484    Business Services
   (ISRG)1 Year Chart         ISRG Intuitive Surgical Inc 21 - $372.63 $286,191,000 848,324 0.83% 63,119,000 85,137 0.237    Medical Appliances & ...
   (ELF)1 Year Chart         ELF E L F Beauty Inc 25 - $161.38 $270,024,000 1,870,753 0.79% 113,597,000 446,485 3.483    N/A
   (POOL)1 Year Chart         POOL Pool Corporation 26 - $365.82 $265,843,000 666,757 0.77% 49,805,000 60,079 1.579    Wholesale, Other
   (PANW)1 Year Chart         PANW Palo Alto Networks Inc 28 - $303.01 $261,140,000 885,580 0.76% 70,423,000 72,080 0.295    Networking & Communic...
   (NOW)1 Year Chart         NOW Servicenow, Inc. 30 - $721.03 $259,337,000 367,078 0.75% 64,994,000 19,391 0.188    Information Technolog...
   (NFE)1 Year Chart         NFE New Fortress Energy Llc 31 - $26.49 $256,748,000 6,804,882 0.75% 51,026,000 529,035 4.033    N/A
   (DT)1 Year Chart         DT Dynatrace, Inc. 35 - $0.00 $246,410,000 4,505,582 0.72% 67,190,000 670,350 1.461    N/A
   (CPRT)1 Year Chart         CPRT Copart Inc 36 - $55.16 $245,077,000 5,001,567 0.71% 74,788,000 1,049,637 1.05    Auto Dealerships
   (NICE)1 Year Chart         NICE NICE Systems Ltd (ADR) 37 - $222.02 $242,444,000 1,215,412 0.71% 69,515,000 198,006 1.938    Computer Peripherals
   (LANC)1 Year Chart         LANC Lancaster Colony Corp 40 - $194.86 $229,870,000 1,381,516 0.67% 14,075,000 73,904 5.016    Housewares & Accessories
   (AMD)1 Year Chart         AMD Advanced Micro Devices Inc 44 - $153.62 $217,552,000 1,475,831 0.63% 76,032,000 99,446 0.123    Semiconductor- Broad...
   (MNST)1 Year Chart         MNST Monster Beverage Corporation 46 - $54.30 $208,834,000 3,624,962 0.61% 27,121,000 193,177 0.511    Beverage Soft Drinks...
   (RACE)1 Year Chart         RACE Ferrari NV 47 - $0.00 $208,244,000 615,323 0.61% 27,838,000 4,894 0.333    N/A
   (PODD)1 Year Chart         PODD Insulet Corp 49 - $173.42 $199,337,000 918,689 0.58% 82,443,000 185,766 1.206    Medical Instruments &...
   (BFAM)1 Year Chart         BFAM Bright Horizons Family Solu... 53 - $113.79 $191,441,000 2,031,419 0.56% 35,592,000 118,227 3.354    Personal Services
   (LRCX)1 Year Chart         LRCX Lam Research Corp 54 - $913.28 $191,426,000 244,396 0.56% 48,466,000 16,306 0.17    Semiconductor Equipme...
   (PEN)1 Year Chart         PEN Penumbra Inc 55 - $203.09 $186,959,000 743,259 0.54% 28,033,000 86,295 2.047    N/A
   (CRHCF)1 Year Chart         CRHCF CRH Plc 61 - $79.78 $174,379,000 2,521,385 0.51% 173,683,000 2,508,677 0    N/A
   (MLM)1 Year Chart         MLM Martin Marietta Materials Inc 67 - $596.64 $165,832,000 332,389 0.48% 82,984,000 130,557 0.376    General Building Mate...
   (FOLD)1 Year Chart         FOLD Amicus Therapeutics Inc 68 - $10.61 $165,271,000 11,647,026 0.48% 39,090,000 1,270,263 3.424    Biotechnology
   (INSP)1 Year Chart         INSP Inspire Medical Systems Inc 69 - $163.41 $164,157,000 806,947 0.48% 26,411,000 112,802 2.803    N/A
   (TXN)1 Year Chart         TXN Texas Instruments Inc 71 - $183.95 $163,242,000 957,654 0.48% 75,212,000 404,039 0.104    Semiconductor- Broad...
   (BPMC)1 Year Chart         BPMC Blueprint Medicines Corp 75 - $108.78 $159,376,000 1,727,845 0.46% 86,224,000 271,216 2.618    N/A
   (NEOG)1 Year Chart         NEOG Neogen Corp 77 - $12.05 $151,552,000 7,536,169 0.44% 62,643,000 2,740,643 3.487    Diagnostic Substances
   (SMCI)1 Year Chart         SMCI Super Micro Computer Inc 78 - $822.64 $150,889,000 530,815 0.44% 10,138,000 17,537 1.025    Networking & Communic...
   (RE)1 Year Chart         RE Everest Re Group Ltd 80 - $380.97 $148,237,000 419,246 0.43% 50,195,000 155,458 1.046    Life & Health Insurance
   (CSGP)1 Year Chart         CSGP CoStar Group Inc 82 - $90.32 $146,644,000 1,678,036 0.43% 22,718,000 66,306 0.413    Business Software & S...
   (NKE)1 Year Chart         NKE Nike Inc B 84 - $93.59 $142,996,000 1,317,083 0.42% 26,236,000 96,002 0.105    Textile - Apparel Foo...
   (FSV)1 Year Chart         FSV FirstService Corporation 85 - $151.04 $140,168,000 864,756 0.41% 14,380,000 473 1.985    N/A
   (INSM)1 Year Chart         INSM Insmed Inc 89 - $26.00 $131,915,000 4,256,687 0.38% 24,806,000 14,752 2.808    Biotechnology
   (EVH)1 Year Chart         EVH Evolent Health, Inc. 92 - $27.27 $124,802,000 3,778,453 0.36% 53,393,000 1,156,004 3.235    N/A
   (SBUX)1 Year Chart         SBUX Starbucks Corp 94 - $73.50 $122,773,000 1,278,750 0.36% 12,928,000 75,230 0.109    Specialty Eateries
   (SPSC)1 Year Chart         SPSC Sps Commerce Inc 100 - $188.13 $112,553,000 580,650 0.33% 15,398,000 11,192 1.496    Networking & Communic...
   (FLYW)1 Year Chart         FLYW Flywire Corp 102 - $17.24 $110,950,000 4,792,643 0.32% 10,609,000 1,646,170 4.77    N/A
   (SHLS)1 Year Chart         SHLS Shoals Technologies Group, ... 108 - $0.00 $92,582,000 5,957,680 0.27% -15,728,000 22,899 3.344    N/A
   (SKY)1 Year Chart         SKY Skyline Corporation 109 - $78.62 $91,527,000 1,232,524 0.27% 20,668,000 120,490 2.027    Residential Construct...
   (BURL)1 Year Chart         BURL Burlington Stores, Inc. 110 - $187.48 $90,846,000 467,121 0.26% 42,639,000 110,825 0.645    Discount, Variety Stores
   (A)1 Year Chart         A Agilent Technologies Inc 111 - $142.80 $90,121,000 648,213 0.26% 89,459,000 642,295 0.21    Scientific & Technica...
   (ITUB)1 Year Chart         ITUB Banco Itau Holding Financei... 119 - $6.54 $78,647,000 11,320,342 0.23% 27,149,000 1,727,096 0.116    Foreign Money Center ...
   (AIN)1 Year Chart         AIN Albany International Corp 121 - $87.89 $76,547,000 779,340 0.22% 13,506,000 48,682 2.407    Textile Manufacturing
   (ACVA)1 Year Chart         ACVA Acv Auctions Inc. 123 - $0.00 $74,059,000 4,888,409 0.22% 7,724,000 518,542 3.644    N/A
   (FB)1 Year Chart         FB Meta Platforms Inc 126 - $472.60 $71,358,000 201,600 0.21% 17,334,000 21,645 0.008    Internet Service Prov...
   (OEC)1 Year Chart         OEC Orion Engineered Carbons SA 128 - $24.48 $64,338,000 2,320,154 0.19% 17,220,000 105,984 3.836    N/A
   (ATKR)1 Year Chart         ATKR Atkore International Group ... 129 - $157.63 $61,845,000 386,534 0.18% 19,483,000 102,588 0.814    N/A
   (ULTA)1 Year Chart         ULTA Ulta Salon Cosmetics & Frag... 133 - $388.48 $56,880,000 116,083 0.17% 27,877,000 43,476 0.206    Personal Services
   (IBP)1 Year Chart         IBP Installed Building Products... 138 - $232.00 $49,152,000 268,853 0.14% 30,491,000 119,433 0.902    N/A
   (CVX)1 Year Chart         CVX Chevron Corp 140 - $162.54 $46,867,000 314,203 0.14% 6,376,000 74,072 0.016    Integrated Oil & Gas
   (TT)1 Year Chart         TT Trane Technologies (Ingerso... 141 - $327.60 $46,840,000 192,046 0.14% 12,426,000 22,442 0.08    Diversified Machinery
   (GPRE)1 Year Chart         GPRE Green Plains Inc 145 - $19.58 $45,317,000 1,796,878 0.13% -7,080,000 56,130 2.554    Specialty Chemicals
   (ICE)1 Year Chart         ICE Intercontinental Exchange Inc 153 - $133.39 $42,856,000 333,693 0.12% 6,813,000 6,089 0.059    Business Services
   (CALX)1 Year Chart         CALX Calix, Inc 155 - $30.50 $42,232,000 966,631 0.12% 25,101,000 592,919 1.565    Communication Equipment
   (COLB)1 Year Chart         COLB Columbia Banking System Inc 156 - $20.23 $42,084,000 1,577,351 0.12% 11,530,000 72,211 0.809    Savings & Loans
   (ADSK)1 Year Chart         ADSK Autodesk Inc 162 - $213.95 $40,548,000 166,535 0.12% 9,637,000 17,143 0.076    Technical & System So...
   (BAH)1 Year Chart         BAH Booz Allen Hamilton Holding... 170 - $151.07 $38,890,000 304,045 0.11% 7,808,000 19,592 0.22    Management Services
   (VRNT)1 Year Chart         VRNT Verint Systems Inc 177 - $31.31 $38,385,000 1,420,071 0.11% 14,568,000 384,114 2.161    Business Software & S...
   (IDXX)1 Year Chart         IDXX Idexx Laboratories Inc 179 - $487.07 $37,926,000 68,329 0.11% 8,570,000 1,194 0.08    Diagnostic Substances
   (IPAR)1 Year Chart         IPAR Inter Parfums Inc 186 - $118.48 $36,709,000 254,909 0.11% 3,974,000 11,234 0.808    Personal Products
   (TMCI)1 Year Chart         TMCI Treace Medical Concepts, Inc. 188 - $4.17 $36,567,000 2,868,034 0.11% 13,153,000 1,082,033 5.437    N/A
   (LNTH)1 Year Chart         LNTH Lantheus Holdings, Inc. 201 - $74.51 $34,516,000 556,710 0.1% 10,753,000 214,702 0.77    N/A
   (BOOT)1 Year Chart         BOOT Boot Barn Holdings, Inc. 203 - $103.60 $34,445,000 448,742 0.1% -752,000 15,224 1.253    N/A
   (ZIP)1 Year Chart         ZIP Ziprecruiter, Inc. 205 - $10.85 $33,987,000 2,445,105 0.1% 5,867,000 99,837 3.313    N/A
   (WINA)1 Year Chart         WINA Winmark Corp 207 - $365.02 $33,228,000 79,579 0.1% 4,535,000 2,682 2.128    Sporting Goods Stores
   (BDC)1 Year Chart         BDC Belden Inc 209 - $91.46 $32,581,000 421,762 0.09% -5,031,000 32,198 0.943    Systems, Products & D...
   (THS)1 Year Chart         THS TreeHouse Foods Inc 210 - $34.80 $32,487,000 783,764 0.09% 4,998,000 152,991 1.299    Processed & Packaged ...
   (DIOD)1 Year Chart         DIOD Diodes Inc 211 - $74.56 $32,463,000 403,167 0.09% 20,762,000 254,758 0.775    Semiconductor - Integ...
   (BCPC)1 Year Chart         BCPC Balchem Corp 213 - $153.28 $31,900,000 214,454 0.09% 9,087,000 30,538 0.663    Specialty Chemicals
   (SPB)1 Year Chart         SPB Spectrum Brands Holdings Inc 220 - $84.52 $31,478,000 394,615 0.09% 9,579,000 115,117 0.916    Cleaning Products
   (ROP)1 Year Chart         ROP Roper Industries Inc 226 - $521.05 $30,507,000 55,958 0.09% 4,347,000 1,940 0.053    Diversified Machinery
   (VMC)1 Year Chart         VMC Vulcan Materials Co 236 - $267.93 $28,774,000 126,754 0.08% 3,789,000 3,077 0.096    General Building Mate...
   (KFY)1 Year Chart         KFY Korn Ferry International 237 - $64.08 $28,464,000 479,603 0.08% 13,131,000 156,392 0.852    Staffing & Outsourcin...
   (CHX)1 Year Chart         CHX Championx Inc 240 - $10.34 $28,130,000 963,020 0.08% -1,271,000 137,602 0.456    N/A
   (BLFS)1 Year Chart         BLFS Biolife Solutions Inc 241 - $17.94 $27,835,000 1,712,927 0.08% 18,500,000 1,036,937 4.113    Biotechnology
   (JW.A)1 Year Chart         JW.A John Wiley & Sons Inc A 244 - $38.87 $27,689,000 872,362 0.08% 95,000 129,997 1.596    Publishing
   (ADNT)1 Year Chart         ADNT Adient Ltd 246 - $28.56 $27,451,000 754,986 0.08% 1,875,000 58,103 0.804    N/A
   (HYH)1 Year Chart         HYH Halyard Health, Inc. 247 - $19.56 $27,369,000 1,220,210 0.08% 5,235,000 125,535 0.26    N/A
   (WSO)1 Year Chart         WSO Watsco Inc 249 - $468.69 $27,030,000 63,085 0.08% 3,881,000 1,799 0.176    Building Materials Wh...
   (TITN)1 Year Chart         TITN Titan Machinery Inc 250 - $23.62 $26,889,000 931,054 0.08% 15,712,000 510,533 4.133    Consumer Services
   (ADTN)1 Year Chart         ADTN ADTRAN Inc 252 - $20.56 $26,705,000 3,638,305 0.08% 6,905,000 1,232,466 4.685    Communication Equipment
   (PRO)1 Year Chart         PRO Pros Holdings Inc 253 - $30.56 $26,578,000 685,168 0.08% 3,112,000 7,338 1.503    Application Software
   (CAKE)1 Year Chart         CAKE Cheesecake Factory Incorpor... 254 - $33.97 $26,349,000 752,617 0.08% 6,749,000 105,756 1.464    Restaurants
   (STVN)1 Year Chart         STVN Stevanato Group 255 - $26.91 $26,051,000 954,608 0.08% -144,000 73,227 2.823    N/A
   (STEL)1 Year Chart         STEL Stellar Bancorp Ord Shs 257 - $29.25 $25,378,000 911,580 0.07% 23,650,000 830,541 1.743    N/A
   (PLOW)1 Year Chart         PLOW Douglas Dynamics, Inc 261 - $22.62 $24,984,000 841,769 0.07% 3,205,000 120,130 3.692    Auto Parts
   (EPC)1 Year Chart         EPC Edgewell Personal Care Co 270 - $131.80 $23,643,000 645,462 0.07% 628,000 22,751 1.188    Industrial Electrical...
   (POWI)1 Year Chart         POWI Power Integrations Inc 272 - $76.63 $23,499,000 286,185 0.07% 4,385,000 35,708 0.478    Semiconductor - Integ...
   (ALHC)1 Year Chart         ALHC Alignment Healthcare, Inc. 281 - $0.00 $21,670,000 2,516,788 0.06% 8,391,000 603,329 1.344    N/A
   (IBN)1 Year Chart         IBN ICICI Bank Limited (ADR) 282 - $26.94 $21,508,000 902,328 0.06% 4,356,000 160,310 0.026    Foreign Money Center ...
   (GDEN)1 Year Chart         GDEN Golden Entertainment, Inc 285 - $30.65 $21,112,000 528,719 0.06% 5,575,000 74,163 1.857    Gambling/Resorts
   (PDFS)1 Year Chart         PDFS PDF Solutions Inc 287 - $32.44 $20,825,000 647,937 0.06% 2,814,000 92,033 1.769    Technical & System So...

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