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WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Period ended Sep 30, 2026 · Latest filing Nov 6, 2026
These quarterly holdings are delayed and may not include all assets or short positions.
Values are from the reporting date, not current prices or purchase costs.
The same security may appear in multiple rows.
Source: SEC
Reported portfolio value
Quarter-end reported holdings; not current value or investment performance.
View reported values
- Sep 30, 2026: $30,826,149,452
More quarters will appear as history becomes available.
Top holdings
Top 10 at Sep 30, 2026. Matching entries are combined; security classes and options remain separate. Shares exclude principal amounts; option shares reflect the reported underlying amount.
View top holdings values
- TAIWAN SEMICONDUCTOR MANUFAC · SPONSORED ADS · 874039100 · shares: $2,092,114,776
- NVIDIA CORPORATION · COM · 67066G104 · shares: $1,855,276,337
- ALPHABET INC · CAP STK CL A · 02079K305 · shares: $1,241,460,954
- APPLE INC · COM · 037833100 · shares: $1,006,662,062
- MICROSOFT CORP · COM · 594918104 · shares: $877,785,620
- BROADCOM INC · COM · 11135F101 · shares: $696,529,299
- META PLATFORMS INC · CL A · 30303M102 · shares: $585,058,590
- ADVANCED MICRO DEVICES INC · COM · 007903107 · shares: $479,128,597
- MASTERCARD INCORPORATED · CL A · 57636Q104 · shares: $390,246,345
- EVERPURE INC · CL A · 74624M102 · shares: $333,448,981
Reported holdings
399 reported entries| Issuer | Class | CUSIP | Type | Shares / principal | Reported value (USD) |
|---|---|---|---|---|---|
| TAIWAN SEMICONDUCTOR MANUFAC | SPONSORED ADS | 874039100 | — | 4,586,962 shares | $2,092,114,776 |
| NVIDIA CORPORATION | COM | 67066G104 | — | 8,123,638 shares | $1,855,276,337 |
| ALPHABET INC | CAP STK CL A | 02079K305 | — | 3,608,059 shares | $1,241,460,954 |
| APPLE INC | COM | 037833100 | — | 3,022,828 shares | $1,006,662,062 |
| MICROSOFT CORP | COM | 594918104 | — | 1,711,417 shares | $877,785,620 |
| BROADCOM INC | COM | 11135F101 | — | 1,983,340 shares | $696,529,299 |
| META PLATFORMS INC | CL A | 30303M102 | — | 806,777 shares | $585,058,590 |
| ADVANCED MICRO DEVICES INC | COM | 007903107 | — | 783,197 shares | $479,128,597 |
| MASTERCARD INCORPORATED | CL A | 57636Q104 | — | 707,647 shares | $390,246,345 |
| EVERPURE INC | CL A | 74624M102 | — | 2,549,694 shares | $333,448,981 |
| AMAZON COM INC | COM | 023135106 | — | 1,332,803 shares | $332,067,867 |
| APPLIED MATLS INC | COM | 038222105 | — | 606,347 shares | $310,073,835 |
| TWIST BIOSCIENCE CORP | COM | 90184D100 | — | 1,454,117 shares | $280,993,569 |
| CARLYLE GROUP INC | COM | 14316J108 | — | 6,821,563 shares | $270,543,175 |
| GE AEROSPACE | COM NEW | 369604301 | — | 854,907 shares | $266,978,986 |
| CREDICORP LTD | COM | G2519Y108 | — | 699,385 shares | $265,675,380 |
| SNOWFLAKE INC | COM SHS | 833445109 | — | 781,249 shares | $265,280,910 |
| AMPHENOL CORP | CL A | 032095101 | — | 3,087,928 shares | $260,312,330 |
| SEAGATE TECHNOLOGY HLDNGS PL | ORD SHS | G7997R103 | — | 276,990 shares | $255,478,984 |
| MUELLER INDS INC | COM | 624756102 | — | 4,072,710 shares | $246,846,982 |
| F5 INC | COM | 315616102 | — | 546,951 shares | $243,491,646 |
| TEVA PHARMACEUTICAL INDS LTD | SHS | M8769Q102 | — | 6,118,972 shares | $242,311,291 |
| REPLIGEN CORP | COM | 759916109 | — | 1,243,415 shares | $239,021,665 |
| MICRON TECHNOLOGY INC | COM | 595112103 | — | 224,405 shares | $239,016,029 |
| ARGENX SE | SPONSORED ADR | 04016X101 | — | 247,401 shares | $237,204,488 |
| CROWDSTRIKE HLDGS INC | CL A | 22788C105 | — | 890,794 shares | $235,837,712 |
| DYNATRACE INC | COM NEW | 268150109 | — | 3,873,980 shares | $223,683,605 |
| BORGWARNER INC | COM | 099724106 | — | 3,712,405 shares | $223,152,693 |
| PRIMO BRANDS CORPORATION | CLASS A COM SHS | 741623102 | — | 11,230,798 shares | $213,946,711 |
| ELASTIC N V | ORD SHS | N14506104 | — | 2,315,469 shares | $212,328,507 |
| TALEN ENERGY CORP | COM | 87422Q109 | — | 677,759 shares | $211,928,462 |
| AGILENT TECHNOLOGIES INC | COM | 00846U101 | — | 1,225,480 shares | $211,162,410 |
| LINDE PLC | SHS | G54950103 | — | 437,021 shares | $207,432,018 |
| ONTO INNOVATION INC | COM | 683344105 | — | 652,188 shares | $200,756,510 |
| ITAU UNIBANCO HLDG S A | SPON ADR REP PFD | 465562106 | — | 21,269,537 shares | $181,403,049 |
| HALOZYME THERAPEUTICS INC | COM | 40637H109 | — | 1,616,472 shares | $178,458,509 |
| UNITEDHEALTH GROUP INC | COM | 91324P102 | — | 484,420 shares | $177,820,962 |
| SERVICENOW INC | COM | 81762P102 | — | 1,316,931 shares | $176,481,923 |
| KRYSTAL BIOTECH INC | COM | 501147102 | — | 520,925 shares | $173,238,818 |
| EVEREST GROUP LTD | COM | G3223R108 | — | 471,187 shares | $172,063,357 |
| MADRIGAL PHARMACEUTICALS INC | COM | 558868105 | — | 337,035 shares | $169,852,159 |
| MANHATTAN ASSOCIATES INC | COM | 562750109 | — | 847,546 shares | $168,407,390 |
| APPFOLIO INC | COM CL A | 03783C100 | — | 836,167 shares | $167,668,207 |
| GUARDANT HEALTH INC | COM | 40131M109 | — | 937,974 shares | $167,297,043 |
| VISHAY INTERTECHNOLOGY INC | COM | 928298108 | — | 5,124,041 shares | $166,787,535 |
| CURTISS WRIGHT CORP | COM | 231561101 | — | 305,868 shares | $166,337,136 |
| COSTCO WHOLESALE CORPORATION | COM | 22160K105 | — | 179,618 shares | $163,513,450 |
| IDEXX LABS INC | COM | 45168D104 | — | 306,107 shares | $159,846,014 |
| CANADIAN NAT RES LTD MED TER | COM | 136385101 | — | 3,352,895 shares | $157,695,217 |
| AKAMAI TECHNOLOGIES INC | COM | 00971T101 | — | 1,462,172 shares | $155,501,992 |
| GRAND CANYON ED INC | COM | 38526M106 | — | 1,020,326 shares | $154,671,218 |
| NVENT ELEC PLC | SHS | G6700G107 | — | 964,381 shares | $154,657,781 |
| HEALTHEQUITY INC | COM | 42226A107 | — | 1,740,078 shares | $153,927,300 |
| TRANSUNION | COM | 89400J107 | — | 2,465,258 shares | $150,676,559 |
| WEST PHARMACEUTICAL SVSC INC | COM | 955306105 | — | 399,467 shares | $148,106,261 |
| TEXAS INSTRS INC | COM | 882508104 | — | 527,520 shares | $147,753,054 |
| CAMECO CORP | COM | 13321L108 | — | 1,674,206 shares | $145,103,393 |
| DIODES INC | COM | 254543101 | — | 1,496,460 shares | $144,842,363 |
| LATTICE SEMICONDUCTOR CORP | COM | 518415104 | — | 1,138,357 shares | $143,000,406 |
| TOTALENERGIES SE | ACT | F92124100 | — | 1,665,143 shares | $142,833,838 |
| ENCOMPASS HEALTH CORP | COM | 29261A100 | — | 1,166,552 shares | $141,724,402 |
| C H ROBINSON WORLDWIDE IN | COM NEW | 12541W209 | — | 942,784 shares | $139,494,369 |
| MONSTER BEVERAGE CORP NEW | COM | 61174X109 | — | 3,315,668 shares | $137,998,102 |
| HUDBAY MINERALS INC | COM | 443628102 | — | 5,137,438 shares | $137,066,846 |
| LINCOLN ELEC HLDGS INC | COM | 533900106 | — | 495,893 shares | $131,203,436 |
| FIRST HORIZON CORPORATION | COM | 320517105 | — | 5,576,059 shares | $128,360,878 |
| CLEAN HARBORS INC | COM | 184496107 | — | 410,744 shares | $127,425,111 |
| BWX TECHNOLOGIES INC | COM | 05605H100 | — | 924,774 shares | $126,694,038 |
| VERACYTE INC | COM | 92337F107 | — | 2,709,212 shares | $124,732,120 |
| CARPENTER TECHNOLOGY CORP | COM | 144285103 | — | 319,564 shares | $124,252,874 |
| LITTELFUSE INC | COM | 537008104 | — | 292,546 shares | $123,963,442 |
| MARRIOTT INTL INC NEW | CL A | 571903202 | — | 344,925 shares | $122,679,475 |
| FERRARI N V | COM | N3167Y103 | — | 308,492 shares | $121,191,082 |
| LAM RESEARCH CORP | COM NEW | 512807306 | — | 363,995 shares | $119,575,997 |
| OREILLY AUTOMOTIVE INC | COM | 67103H107 | — | 1,395,139 shares | $119,158,822 |
| MIRUM PHARMACEUTICALS INC | COM | 604749101 | — | 1,383,348 shares | $118,248,587 |
| REGAL REXNORD CORPORATION | COM | 758750103 | — | 728,099 shares | $112,935,471 |
| GENEDX HOLDINGS CORP | COM CL A | 81663L200 | — | 1,560,247 shares | $112,805,858 |
| ETSY INC | COM | 29786A106 | — | 1,571,429 shares | $112,341,459 |
| PTC THERAPEUTICS INC | COM | 69366J200 | — | 1,693,624 shares | $109,712,963 |
| FORGENT POWER SOLUTIONS INC | COM SHS CL A | 34631F102 | — | 2,925,175 shares | $109,518,552 |
| TIMKEN CO | COM | 887389104 | — | 930,785 shares | $108,669,149 |
| GLOBUS MED INC | CL A | 379577208 | — | 1,447,365 shares | $108,407,639 |
| STERLING INFRASTRUCTURE INC | COM | 859241101 | — | 220,158 shares | $108,269,301 |
| GLAUKOS CORP | COM | 377322102 | — | 651,456 shares | $106,962,561 |
| NOVANTA INC | COM | 67000B104 | — | 749,688 shares | $106,598,137 |
| CYTOKINETICS INC | COM NEW | 23282W605 | — | 1,576,135 shares | $103,883,058 |
| FRESHPET INC | COM | 358039105 | — | 1,778,013 shares | $102,342,428 |
| BENTLEY SYS INC | COM CL B | 08265T208 | — | 3,170,676 shares | $101,303,098 |
| JAZZ PHARMACEUTICALS PLC | SHS USD | G50871105 | — | 428,249 shares | $99,148,208 |
| STEPSTONE GROUP INC | COM CL A | 85914M107 | — | 2,276,447 shares | $98,797,800 |
| WEATHERFORD INTL PLC | ORD SHS | G48833118 | — | 1,240,007 shares | $97,563,751 |
| EAGLE MATLS INC | COM | 26969P108 | — | 568,629 shares | $97,246,932 |
| MERIT MED SYS INC | COM | 589889104 | — | 1,119,581 shares | $96,541,470 |
| NU HLDGS LTD | ORD SHS CL A | G6683N103 | — | 7,610,814 shares | $96,352,905 |
| RELIANCE INC | COM | 759509102 | — | 250,271 shares | $96,291,767 |
| JONES LANG LASALLE INC | COM | 48020Q107 | — | 315,152 shares | $96,285,239 |
| NATIONAL BK HLDGS CORP | CL A | 633707104 | — | 2,410,798 shares | $94,479,174 |
| LANDBRIDGE COMPANY LLC | CL A | 514952100 | — | 1,146,546 shares | $93,065,139 |
| TPG INC | COM CL A | 872657101 | — | 2,088,244 shares | $92,154,208 |