Holdings of William Blair Small-Mid Cap Growth Fund
WILLIAM BLAIR FUNDS · 82 declared positions · as of Mar 31, 2026
Original filing · Net assets 1.1B $ · Ten largest lines: 20.8 % of the equity sleeve
Country breakdown
Shares computed on the equity sleeve, the only part this site carries.
| Country | Lines | Value (USD) | Share |
|---|---|---|---|
| US | 77 | 1B $ | 93.60 % |
| CA | 2 | 27.5M $ | 2.48 % |
| IE | 1 | 18.8M $ | 1.70 % |
| KY | 1 | 13.6M $ | 1.23 % |
| JE | 1 | 11.1M $ | 1.00 % |
Sector breakdown is published in no regulatory filing: neither Form N-PORT nor the LEI reference data carries an activity code. It is absent rather than estimated.
Positions
| Company | Shares | Value (USD) | Weight |
|---|---|---|---|
| Primo Brands Corp | 1,328,343 | 25M $ | 2.22 % |
| Twist Bioscience Corp | 512,073 | 24.3M $ | 2.16 % |
| Lattice Semiconductor Corp | 256,685 | 23.8M $ | 2.11 % |
| BWX Technologies Inc | 112,849 | 23.1M $ | 2.05 % |
| F5 Inc | 78,244 | 22.6M $ | 2.01 % |
| Mueller Industries Inc | 204,200 | 22.6M $ | 2.01 % |
| Akamai Technologies Inc | 196,800 | 22.6M $ | 2.01 % |
| Nextpower Inc | 184,900 | 22.3M $ | 1.98 % |
| Onto Innovation Inc | 108,666 | 22.3M $ | 1.98 % |
| Insmed Inc | 132,551 | 21.7M $ | 1.92 % |
| TALEN ENERGY CORP | 66,500 | 21.2M $ | 1.89 % |
| Madrigal Pharmaceuticals Inc | 38,600 | 20.2M $ | 1.79 % |
| Everpure Inc | 342,100 | 20.2M $ | 1.79 % |
| Curtiss-Wright Corp | 29,100 | 19.8M $ | 1.76 % |
| Everest Group Ltd | 59,132 | 19.3M $ | 1.72 % |
| Coherent Corp | 80,600 | 19.2M $ | 1.71 % |
| nVent Electric PLC | 159,100 | 18.8M $ | 1.67 % |
| Globus Medical Inc | 217,495 | 18.7M $ | 1.66 % |
| Cameco Corp | 172,388 | 18.7M $ | 1.66 % |
| Clean Harbors Inc | 65,100 | 18.7M $ | 1.66 % |
| Ciena Corp | 44,500 | 17.3M $ | 1.53 % |
| Carpenter Technology Corp | 43,500 | 17.1M $ | 1.52 % |
| First Horizon Corp | 746,500 | 17M $ | 1.51 % |
| Donaldson Co Inc | 195,700 | 16.6M $ | 1.48 % |
| Lincoln Electric Holdings Inc | 64,200 | 16M $ | 1.42 % |
| Halozyme Therapeutics Inc | 244,400 | 15.8M $ | 1.40 % |
| Bio-Techne Corp | 298,700 | 15.6M $ | 1.39 % |
| Bentley Systems Inc | 443,300 | 15.6M $ | 1.38 % |
| Carlyle Group Inc/The | 317,493 | 15.4M $ | 1.36 % |
| Churchill Downs Inc | 164,900 | 14.8M $ | 1.32 % |
| Reliance Inc | 48,300 | 14.7M $ | 1.30 % |
| Grand Canyon Education Inc | 85,200 | 14.5M $ | 1.29 % |
| Dynatrace Inc | 386,586 | 14.3M $ | 1.27 % |
| BorgWarner Inc | 262,697 | 14.3M $ | 1.27 % |
| Sterling Infrastructure Inc | 34,700 | 14.1M $ | 1.26 % |
| Regal Rexnord Corp | 73,700 | 13.8M $ | 1.23 % |
| SharkNinja Inc | 128,500 | 13.6M $ | 1.21 % |
| Baldwin Insurance Group Inc/The | 603,410 | 13.2M $ | 1.18 % |
| Advanced Drainage Systems Inc | 96,200 | 13.2M $ | 1.17 % |
| HealthEquity Inc | 156,800 | 13.1M $ | 1.16 % |
| Guardant Health Inc | 139,700 | 12.9M $ | 1.15 % |
| Manhattan Associates Inc | 92,400 | 12.3M $ | 1.09 % |
| Planet Fitness Inc | 165,300 | 12.3M $ | 1.09 % |
| Glaukos Corp | 114,100 | 12.3M $ | 1.09 % |
| Cullen/Frost Bankers Inc | 89,500 | 12.3M $ | 1.09 % |
| Cava Group Inc | 147,600 | 11.9M $ | 1.06 % |
| Parsons Corp | 218,300 | 11.8M $ | 1.05 % |
| Eagle Materials Inc | 61,187 | 11.6M $ | 1.03 % |
| Doximity Inc | 497,252 | 11.6M $ | 1.03 % |
| Power Integrations Inc | 220,514 | 11.3M $ | 1.00 % |
| Birkenstock Holding Plc | 309,300 | 11.1M $ | 0.98 % |
| Synaptics Inc | 157,600 | 11M $ | 0.98 % |
| Pool Corp | 54,400 | 11M $ | 0.98 % |
| Kennametal Inc | 298,400 | 10.8M $ | 0.96 % |
| Evercore Inc | 35,200 | 10.5M $ | 0.93 % |
| Appfolio Inc | 66,246 | 10.5M $ | 0.93 % |
| Bright Horizons Family Solutions Inc | 127,178 | 10.4M $ | 0.93 % |
| Freshpet Inc | 168,079 | 9.9M $ | 0.88 % |
| Casella Waste Systems Inc | 120,661 | 9.6M $ | 0.85 % |
| StepStone Group Inc | 199,666 | 9.5M $ | 0.85 % |
| National Vision Holdings Inc | 365,700 | 9.5M $ | 0.84 % |
| Encompass Health Corp | 97,917 | 9.5M $ | 0.84 % |
| Krystal Biotech Inc | 36,000 | 9.3M $ | 0.83 % |
| Littelfuse Inc | 26,900 | 9.1M $ | 0.81 % |
| Landbridge Co LLC | 130,297 | 9M $ | 0.80 % |
| Novanta Inc | 74,454 | 8.8M $ | 0.78 % |
| Saia Inc | 25,000 | 8.8M $ | 0.78 % |
| Maplebear Inc | 230,826 | 8.6M $ | 0.77 % |
| API Group Corp | 209,100 | 8.5M $ | 0.75 % |
| TransUnion | 113,700 | 7.9M $ | 0.70 % |
| Guidewire Software Inc | 50,155 | 7.5M $ | 0.67 % |
| Alignment Healthcare Inc | 420,600 | 7.4M $ | 0.66 % |
| BellRing Brands Inc | 445,200 | 7.2M $ | 0.64 % |
| Cytokinetics Inc | 108,500 | 7.2M $ | 0.64 % |
| FirstService Corp | 47,835 | 6.6M $ | 0.59 % |
| TPG Inc | 163,324 | 6.6M $ | 0.59 % |
| Louisiana-Pacific Corp | 87,200 | 6.3M $ | 0.56 % |
| Inspire Medical Systems Inc | 109,400 | 5.6M $ | 0.50 % |
| WillScot Holdings Corp | 286,848 | 5M $ | 0.44 % |
| GeneDx Holdings Corp | 73,218 | 4.7M $ | 0.42 % |
| Insulet Corp | 20,365 | 4.3M $ | 0.38 % |
| ACV Auctions Inc | 639,781 | 2.7M $ | 0.24 % |