NPORT-P false 0000822632 XXXXXXXX S000008603 C000023542 C000023543 C000211721 WILLIAM BLAIR FUNDS 811-05344 0000822632 SNQR0U5FDV8EZZX4W051 150 NORTH RIVERSIDE PLAZA CHICAGO 60606 312-364-8000 William Blair Small-Mid Cap Growth Fund S000008603 549300OZL0V7MPFUUE44 2026-12-31 2026-06-30 N 1317054496.76 1215255.53 1315839241.23 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 N API Group Corp 213800NZT1VX6PZ7BT53 00187Y100 207800.00000000 NS USD 8800330.00000000 0.668799783761 Long EC CORP US N 1 N N N CONTRA ABIOMED INC N/A 003CVR016 80133.00000000 NS USD 0.00000000 0.000000 Long EC CORP US N 3 N N N Akamai Technologies Inc OC1LZNN2LF5WTJ5RIL89 00971T101 195600.00000000 NS USD 23121876.00000000 1.757196112983 Long EC CORP US N 1 N N N Alignment Healthcare Inc N/A 01625V104 768900.00000000 NS USD 18307509.00000000 1.391318059711 Long EC CORP US N 1 N N N Appfolio Inc 529900OOUUGT6JFC0S15 03783C100 77046.00000000 NS USD 12354326.10000000 0.938893271525 Long EC CORP US N 1 N N N Applied Optoelectronics Inc 529900I8U6Q5SYDNLT48 03823U102 64700.00000000 NS USD 9585952.00000000 0.728504797519 Long EC CORP US N 1 N N N Baldwin Insurance Group Inc/The N/A 05589G102 599910.00000000 NS USD 15945607.80000000 1.211820357712 Long EC CORP US N 1 N N N BWX Technologies Inc 549300NP85N265KWMS58 05605H100 112149.00000000 NS USD 21829802.85000000 1.659002267601 Long EC CORP US N 1 N N N Bentley Systems Inc 549300WVEHPGE0Z56F71 08265T208 604500.00000000 NS USD 18068505.00000000 1.373154442719 Long EC CORP US N 1 N N N Bio-Techne Corp 54930073RLKQ51TILZ35 09073M104 105874.00000000 NS USD 7479998.10000000 0.568458354609 Long EC CORP US N 1 N N N BorgWarner Inc 549300DSFX2IE88NSX47 099724106 349645.00000000 NS USD 23216428.00000000 1.764381793196 Long EC CORP US N 1 N N N Bright Horizons Family Solutions Inc 2549009BKSVTM7UEYT38 109194100 126478.00000000 NS USD 8964760.64000000 0.681296039751 Long EC CORP US N 1 N N N Cameco Corp N4BHALMXL3GMZKCUON55 13321L108 171388.00000000 NS USD 17457581.68000000 1.326726026477 Long EC CORP CA N 1 N N N Carlyle Group Inc/The 529900NGGVF94UK6PG95 14316J108 315593.00000000 NS USD 13289621.23000000 1.009973012932 Long EC CORP US N 1 N N N Carpenter Technology Corp DX6I6ZD3X5WNNCDJKP85 144285103 43300.00000000 NS USD 26709172.00000000 2.029820297427 Long EC CORP US N 1 N N N Churchill Downs Inc 529900FODTBQC8MIS994 171484108 163900.00000000 NS USD 14691996.00000000 1.116549464375 Long EC CORP US N 1 N N N Ciena Corp W0CZ7N0GH8UIGXDM1H41 171779309 20400.00000000 NS USD 10007424.00000000 0.760535458012 Long EC CORP US N 1 N N N Circle Internet Group Inc 254900HFVVR6NPMQVN93 172573107 105700.00000000 NS USD 6619991.00000000 0.503100287069 Long EC CORP US N 1 N N N Clean Harbors Inc 5493000SJVZVZJKHJF48 184496107 64700.00000000 NS USD 19329125.00000000 1.468957939112 Long EC CORP US N 1 N N N Cullen/Frost Bankers Inc 529900V2E9G9AY665O34 229899109 89000.00000000 NS USD 13752280.00000000 1.045133749556 Long EC CORP US N 1 N N N Curtiss-Wright Corp TEL51ETZWP7D0ZM4X325 231561101 29000.00000000 NS USD 21975040.00000000 1.670039873522 Long EC CORP US N 1 N N N Cytokinetics Inc 549300BE5DY1HW7IHA64 23282W605 170900.00000000 NS USD 14558971.00000000 1.106439946751 Long EC CORP US N 1 N N N Diodes Inc 549300XP2X1ARVH3BX23 254543101 175400.00000000 NS USD 19195776.00000000 1.458823798419 Long EC CORP US N 1 N N N Dynatrace Inc 6488T0Z33CE9L61EX904 268150109 487847.00000000 NS USD 21421361.77000000 1.627961919571 Long EC CORP US N 1 N N N Eagle Materials Inc 529900KRXRGXL61SG039 26969P108 60887.00000000 NS USD 13699575.00000000 1.041128321054 Long EC CORP US N 1 N N N Encompass Health Corp 549300FVRPM9DRQZRG64 29261A100 150517.00000000 NS USD 15214258.36000000 1.156239902511 Long EC CORP US N 1 N N N Etsy Inc 54930089Q7XT501AEA40 29786A106 181400.00000000 NS USD 13664862.00000000 1.038490232836 Long EC CORP US N 1 N N N Evercore Inc 529900P6KLPT95DW3W58 29977A105 35000.00000000 NS USD 11950400.00000000 0.908196048996 Long EC CORP US N 1 N N N F5 Inc 54930015FPK9KT966303 315616102 77744.00000000 NS USD 32338394.24000000 2.457625006666 Long EC CORP US N 1 N N N First Horizon Corp TF3RXI1ZB1TQ30H9JV10 320517105 742000.00000000 NS USD 19024880.00000000 1.445836193653 Long EC CORP US N 1 N N N Forgent Power Solutions Inc 529900VOEJB5GLOFQR48 34631F102 318800.00000000 NS USD 17808168.00000000 1.353369579049 Long EC CORP US N 1 N N N Freshpet Inc 549300S4ZK8ZQ6HNPN59 358039105 167079.00000000 NS USD 9877710.48000000 0.750677603349 Long EC CORP US N 1 N N N Glaukos Corp 5299004JA1LHE21M6T14 377322102 75900.00000000 NS USD 10607784.00000000 0.806161092299 Long EC CORP US N 1 N N N Globus Medical Inc 5299003M2P4CIK0RF205 379577208 136495.00000000 NS USD 10784469.95000000 0.819588716621 Long EC CORP US N 1 N N N Grand Canyon Education Inc 529900XFER799IYOSW74 38526M106 84700.00000000 NS USD 12121417.00000000 0.921192849414 Long EC CORP US N 1 N N N Guardant Health Inc 254900M8C3E5VC8BR186 40131M109 174397.00000000 NS USD 26164781.91000000 1.988448215417 Long EC CORP US N 1 N N N Guidewire Software Inc 549300WXSG0J8IXZCK32 40171V100 94155.00000000 NS USD 11585772.75000000 0.880485426104 Long EC CORP US N 1 N N N Halozyme Therapeutics Inc 529900242I3SV9AGM753 40637H109 243000.00000000 NS USD 19019610.00000000 1.445435688802 Long EC CORP US N 1 N N N HealthEquity Inc 529900LRJU1RAFQHM467 42226A107 155800.00000000 NS USD 14071856.00000000 1.069420606946 Long EC CORP US N 1 N N N Hudbay Minerals Inc 894500LX3TMESP27BE29 443628102 485300.00000000 NS USD 11457933.00000000 0.870769972575 Long EC CORP CA N 1 N N N Insmed Inc 529900Q55QAG41CCAC11 457669307 97251.00000000 NS USD 10368901.62000000 0.788006718078 Long EC CORP US N 1 N N N Karman Holdings Inc 529900O0VTB7GNU1Z532 485924104 125900.00000000 NS USD 6284928.00000000 0.477636462196 Long EC CORP US N 1 N N N Kennametal Inc 549300GZDSG25XUV0Y08 489170100 250800.00000000 NS USD 8790540.00000000 0.668055771902 Long EC CORP US N 1 N N N Krystal Biotech Inc 549300YONUY68210OE41 501147102 59100.00000000 NS USD 21965697.00000000 1.669329832378 Long EC CORP US N 1 N N N Landbridge Co LLC 529900P7NBGGY6C0SF08 514952100 129497.00000000 NS USD 10261342.28000000 0.779832517413 Long EC CORP US N 1 N N N Lattice Semiconductor Corp 549300LRBBPZDQ2II567 518415104 179285.00000000 NS USD 27423433.60000000 2.084102125907 Long EC CORP US N 1 N N N Lincoln Electric Holdings Inc BIMGBY40SIN95O01BN93 533900106 63800.00000000 NS USD 16939538.00000000 1.287356195895 Long EC CORP US N 1 N N N Littelfuse Inc 549300MY7HLQFYTPCX75 537008104 26700.00000000 NS USD 12157311.00000000 0.923920690238 Long EC CORP US N 1 N N N Madrigal Pharmaceuticals Inc 549300CHIMT2EUSNJB60 558868105 38300.00000000 NS USD 20565185.00000000 1.562894946101 Long EC CORP US N 1 N N N Manhattan Associates Inc 529900Q1GJP7KD52SW51 562750109 104400.00000000 NS USD 14537700.00000000 1.104823411894 Long EC CORP US N 1 N N N Maplebear Inc N/A 565394103 229426.00000000 NS USD 10863321.10000000 0.825581177366 Long EC CORP US N 1 N N N Mirum Pharmaceuticals Inc 254900YZKR40F7F27K81 604749101 145800.00000000 NS USD 17068806.00000000 1.297180192319 Long EC CORP US N 1 N N N Mueller Industries Inc 5493005IZFE4VJLLYG84 624756102 203000.00000000 NS USD 24954790.00000000 1.896492308336 Long EC CORP US N 1 N N N National Vision Holdings Inc 549300JHURCBLI5ROA42 63845R107 363600.00000000 NS USD 6912036.00000000 0.525294867596 Long EC CORP US N 1 N N N Nextpower Inc N/A 65290E101 74200.00000000 NS USD 8840188.00000000 0.671828877191 Long EC CORP US N 1 N N N Novanta Inc N/A 67000B104 74054.00000000 NS USD 12014520.96000000 0.913069057643 Long EC CORP CA N 1 N N N Onto Innovation Inc 254900RXZVN73CHOO062 683344105 78366.00000000 NS USD 29657612.70000000 2.253893315438 Long EC CORP US N 1 N N N PTC Therapeutics Inc 549300UJLWOIWFDGB318 69366J200 184200.00000000 NS USD 15025194.00000000 1.141871554609 Long EC CORP US N 1 N N N Power Integrations Inc 54930085LGXSCIHD5W31 739276103 247714.00000000 NS USD 20748524.64000000 1.576828231737 Long EC CORP US N 1 N N N Primo Brands Corp 254900J0WS4AXV2LAX55 741623102 1180673.00000000 NS USD 28855648.12000000 2.192946312577 Long EC CORP US N 1 N N N Everpure Inc 549300NPDB0BZTK3WO90 74624M102 428500.00000000 NS USD 33761515.00000000 2.565778093716 Long EC CORP US N 1 N N N Regal Rexnord Corp QH78R09VCJGQKPBPYU33 758750103 81500.00000000 NS USD 19412485.00000000 1.475293059496 Long EC CORP US N 1 N N N Reliance Inc 549300E287ZOFT3C5Z56 759509102 48100.00000000 NS USD 17970160.00000000 1.365680505409 Long EC CORP US N 1 N N N Repligen Corp 54930006QJ0T5AUO1E71 759916109 63042.00000000 NS USD 8601450.48000000 0.653685511914 Long EC CORP US N 1 N N N Saia Inc 549300WNPG4N9GBOYB29 78709Y105 40000.00000000 NS USD 16846400.00000000 1.280277975617 Long EC CORP US N 1 N N N GeneDx Holdings Corp N/A 81663L200 126588.00000000 NS USD 8690266.20000000 0.660435251336 Long EC CORP US N 1 N N N Fixed Income Clearing Corp. 549300H47WTHXPU08X20 000000000 20566794.57000000 PA USD 20566794.57000000 1.563017268794 Long RA CORP US N 2 Repurchase N 1.15000000 2026-07-01 20929700.00000000 USD 20978130.46000000 USD UST N N N StepStone Group Inc 2549007I2AGBHI2F7C52 85914M107 198466.00000000 NS USD 8208553.76000000 0.623826490561 Long EC CORP US N 1 N N N Sterling Infrastructure Inc 549300RZIK6K1215XU51 859241101 34500.00000000 NS USD 28957920.00000000 2.200718681480 Long EC CORP US N 1 N N N Stride Inc 254900BRWS3AFONWU277 86333M108 97700.00000000 NS USD 8425648.00000000 0.640325028772 Long EC CORP US N 1 N N N Synaptics Inc 549300AJ3LI4FWNRQX29 87157D109 156300.00000000 NS USD 19417149.00000000 1.475647510090 Long EC CORP US N 1 N N N TPG Inc 549300NLO4R8MX77XJ02 872657101 162324.00000000 NS USD 6582238.20000000 0.500231182788 Long EC CORP US N 1 N N N Talen Energy Corp K5K33XN0PQAU1XF7NN66 87422Q109 66100.00000000 NS USD 25399586.00000000 1.930295525786 Long EC CORP US N 1 N N N Timken Co/The B0I35MLPFXZSE70ASS73 887389104 124800.00000000 NS USD 18135936.00000000 1.378279004891 Long EC CORP US N 1 N N N TransUnion 549300ZS772LUNUMRB03 89400J107 113000.00000000 NS USD 8151820.00000000 0.619514887880 Long EC CORP US N 1 N N N Twist Bioscience Corp 549300T23BL59LCOH584 90184D100 202973.00000000 NS USD 20881862.24000000 1.586961506063 Long EC CORP US N 1 N N N Dpc Holdings Ltd N/A 000000000 61151.00000000 NS USD 3000068.06000000 0.227996548970 Long EC CORP JE N 1 N N N Everest Group Ltd 549300N24XF2VV0B3570 000000000 58832.00000000 NS USD 21016555.36000000 1.597197796013 Long EC CORP BM N 1 N N N Weatherford International PLC 529900LPBDSCQDJKHQ39 000000000 87600.00000000 NS USD 7139400.00000000 0.542573878046 Long EC CORP IE N 1 N N N Jazz Pharmaceuticals PLC 635400GAUMJCLEZRRV50 000000000 53990.00000000 NS USD 13009970.30000000 0.988720346099 Long EC CORP IE N 1 N N N nVent Electric PLC 254900LK60A9DK5W5N81 000000000 158200.00000000 NS USD 26832302.00000000 2.039177823494 Long EC CORP IE N 1 N N N SharkNinja Inc N/A 000000000 127700.00000000 NS USD 19444879.00000000 1.477754910381 Long EC CORP KY N 1 N N N Birkenstock Holding Plc 529900CQ8LQKQ7LIT631 000000000 361300.00000000 NS USD 15546739.00000000 1.181507475447 Long EC CORP JE N 1 N N N 2026-07-15 WILLIAM BLAIR FUNDS John Raczek John Raczek Principal Financial Officer