# WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

> Institutional holdings reported to the SEC as of Q2 2026 on Form 13F. CIK 1644956. Source: https://holderbook.com/funds/1644956-william-blair-investment-management-llc/

- Reported value: $33.3B
- Positions: 403
- Weight of the ten largest: 28.9%
- Filed: 2026-08-12

A 13F reports long US equity positions only. Short positions, bonds, foreign listings, private holdings and cash are not visible, so this is not the manager's whole book.

## Holdings

| Security | Ticker | Value | Shares | Weight | Quarters held |
|---|---|---|---|---|---|
| TAIWAN SEMICONDUCTOR MANUFAC | [TSM](https://holderbook.com/stocks/TSM/) | $2.4B | 4,936,408 | 7.1% | 31 |
| NVIDIA CORPORATION | [NVDA](https://holderbook.com/stocks/NVDA/) | $1.7B | 8,599,021 | 5.2% | 21 |
| ALPHABET INC | [GOOGL](https://holderbook.com/stocks/GOOGL/) | $1.1B | 3,191,012 | 3.4% | 31 |
| APPLE INC | [AAPL](https://holderbook.com/stocks/AAPL/) | $943.3M | 3,259,914 | 2.8% | 9 |
| BROADCOM INC | [AVGO](https://holderbook.com/stocks/AVGO/) | $776.7M | 2,056,135 | 2.3% | 9 |
| MICROSOFT CORP | [MSFT](https://holderbook.com/stocks/MSFT/) | $764.2M | 2,048,642 | 2.3% | 31 |
| META PLATFORMS INC | [META](https://holderbook.com/stocks/META/) | $535.2M | 950,115 | 1.6% | 31 |
| AMAZON COM INC | [AMZN](https://holderbook.com/stocks/AMZN/) | $473.6M | 1,987,085 | 1.4% | 31 |
| MASTERCARD INCORPORATED | [MA](https://holderbook.com/stocks/MA/) | $471.5M | 918,005 | 1.4% | 31 |
| ADVANCED MICRO DEVICES INC | [AMD](https://holderbook.com/stocks/AMD/) | $443.5M | 763,517 | 1.3% | 29 |
| APPLIED MATLS INC | [AMAT](https://holderbook.com/stocks/AMAT/) | $360.0M | 497,946 | 1.1% | 11 |
| GE AEROSPACE | [GE](https://holderbook.com/stocks/GE/) | $295.5M | 790,801 | 0.9% | 1 |
| ASTRAZENECA PLC | [AZN](https://holderbook.com/stocks/AZN/) | $283.2M | 1,514,795 | 0.9% | 2 |
| PRIMO BRANDS CORPORATION | [PRMB](https://holderbook.com/stocks/PRMB/) | $279.3M | 11,426,823 | 0.8% | 7 |
| EVERPURE INC | [P](https://holderbook.com/stocks/P/) | $272.2M | 3,455,381 | 0.8% | 31 |
| AMPHENOL CORP | [APH](https://holderbook.com/stocks/APH/) | $270.7M | 1,535,059 | 0.8% | 2 |
| LINDE PLC | [LIN](https://holderbook.com/stocks/LIN/) | $262.0M | 504,953 | 0.8% | 14 |
| ONTO INNOVATION INC | [ONTO](https://holderbook.com/stocks/ONTO/) | $251.8M | 665,377 | 0.8% | 6 |
| BORGWARNER INC | [BWA](https://holderbook.com/stocks/BWA/) | $251.3M | 3,784,707 | 0.8% | 2 |
| CARLYLE GROUP INC | [CG](https://holderbook.com/stocks/CG/) | $249.1M | 5,914,905 | 0.7% | 15 |
| ARGENX SE | [ARGX](https://holderbook.com/stocks/ARGX/) | $245.5M | 264,617 | 0.7% | 3 |
| MUELLER INDS INC | [MLI](https://holderbook.com/stocks/MLI/) | $244.2M | 1,986,139 | 0.7% | 7 |
| MONSTER BEVERAGE CORP NEW | [MNST](https://holderbook.com/stocks/MNST/) | $244.0M | 2,538,136 | 0.7% | 14 |
| F5 INC | [FFIV](https://holderbook.com/stocks/FFIV/) | $243.9M | 586,271 | 0.7% | 3 |
| CREDICORP LTD | [BAP](https://holderbook.com/stocks/BAP/) | $243.5M | 625,144 | 0.7% | 31 |
| CURTISS WRIGHT CORP | [CW](https://holderbook.com/stocks/CW/) | $240.4M | 317,306 | 0.7% | 7 |
| ITAU UNIBANCO HLDG S A | [ITUB](https://holderbook.com/stocks/ITUB/) | $231.1M | 28,283,482 | 0.7% | 18 |
| SNOWFLAKE INC | [SNOW](https://holderbook.com/stocks/SNOW/) | $229.3M | 901,087 | 0.7% | 4 |
| TWIST BIOSCIENCE CORP | [TWST](https://holderbook.com/stocks/TWST/) | $223.7M | 2,174,594 | 0.7% | 26 |
| TEVA PHARMACEUTICAL INDS LTD | [TEVA](https://holderbook.com/stocks/TEVA/) | $223.4M | 6,593,221 | 0.7% | 2 |
| UNITEDHEALTH GROUP INC | [UNH](https://holderbook.com/stocks/UNH/) | $217.5M | 523,387 | 0.7% | 31 |
| CROWDSTRIKE HLDGS INC | [CRWD](https://holderbook.com/stocks/CRWD/) | $214.8M | 281,409 | 0.6% | 1 |
| REGAL REXNORD CORPORATION | [RRX](https://holderbook.com/stocks/RRX/) | $212.3M | 891,139 | 0.6% | 4 |
| KRYSTAL BIOTECH INC | [KRYS](https://holderbook.com/stocks/KRYS/) | $211.9M | 570,153 | 0.6% | 5 |
| CARPENTER TECHNOLOGY CORP | [CRS](https://holderbook.com/stocks/CRS/) | $205.2M | 332,607 | 0.6% | 5 |
| POWER INTEGRATIONS INC | [POWI](https://holderbook.com/stocks/POWI/) | $199.5M | 2,382,007 | 0.6% | 2 |
| NVENT ELEC PLC | [NVT](https://holderbook.com/stocks/NVT/) | $198.1M | 1,167,763 | 0.6% | 8 |
| GUARDANT HEALTH INC | [GH](https://holderbook.com/stocks/GH/) | $196.7M | 1,311,320 | 0.6% | 2 |
| HALOZYME THERAPEUTICS INC | [HALO](https://holderbook.com/stocks/HALO/) | $196.5M | 2,511,050 | 0.6% | 3 |
| TALEN ENERGY CORP | [TLN](https://holderbook.com/stocks/TLN/) | $191.2M | 497,660 | 0.6% | 7 |
| TRANSUNION | [TRU](https://holderbook.com/stocks/TRU/) | $191.1M | 2,648,744 | 0.6% | 9 |
| CAMECO CORP | [CCJ](https://holderbook.com/stocks/CCJ/) | $189.3M | 1,858,735 | 0.6% | 31 |
| STERLING INFRASTRUCTURE INC | [STRL](https://holderbook.com/stocks/STRL/) | $187.8M | 223,697 | 0.6% | 4 |
| COSTCO WHOLESALE CORPORATION | [COST](https://holderbook.com/stocks/COST/) | $186.5M | 199,355 | 0.6% | 31 |
| ALIGNMENT HEALTHCARE INC | [ALHC](https://holderbook.com/stocks/ALHC/) | $184.8M | 7,761,403 | 0.6% | 14 |
| C H ROBINSON WORLDWIDE IN | [CHRW](https://holderbook.com/stocks/CHRW/) | $184.3M | 978,297 | 0.6% | 3 |
| SEAGATE TECHNOLOGY HLDNGS PL | [STX](https://holderbook.com/stocks/STX/) | $184.2M | 190,847 | 0.6% | 1 |
| DIODES INC | [DIOD](https://holderbook.com/stocks/DIOD/) | $184.2M | 1,682,686 | 0.6% | 12 |
| BWX TECHNOLOGIES INC | [BWXT](https://holderbook.com/stocks/BWXT/) | $183.2M | 941,233 | 0.6% | 31 |
| AKAMAI TECHNOLOGIES INC | [AKAM](https://holderbook.com/stocks/AKAM/) | $181.5M | 1,535,467 | 0.5% | 2 |
| THE BALDWIN INSURANCE GRP IN | [BWIN](https://holderbook.com/stocks/BWIN/) | $179.0M | 6,732,965 | 0.5% | 11 |
| BENTLEY SYS INC | [BSY](https://holderbook.com/stocks/BSY/) | $177.6M | 5,942,507 | 0.5% | 4 |
| LATTICE SEMICONDUCTOR CORP | [LSCC](https://holderbook.com/stocks/LSCC/) | $177.5M | 1,160,417 | 0.5% | 4 |
| MADRIGAL PHARMACEUTICALS INC | [MDGL](https://holderbook.com/stocks/MDGL/) | $174.0M | 324,123 | 0.5% | 7 |
| EVEREST GROUP LTD | [EG](https://holderbook.com/stocks/EG/) | $171.4M | 479,877 | 0.5% | 12 |
| AGILENT TECHNOLOGIES INC | [A](https://holderbook.com/stocks/A/) | $171.0M | 1,287,265 | 0.5% | 12 |
| OREILLY AUTOMOTIVE INC | [ORLY](https://holderbook.com/stocks/ORLY/) | $170.8M | 1,855,002 | 0.5% | 15 |
| DYNATRACE INC | [DT](https://holderbook.com/stocks/DT/) | $169.4M | 3,857,741 | 0.5% | 22 |
| MIRUM PHARMACEUTICALS INC | [MIRM](https://holderbook.com/stocks/MIRM/) | $164.5M | 1,404,741 | 0.5% | 4 |
| HEALTHEQUITY INC | [HQY](https://holderbook.com/stocks/HQY/) | $160.2M | 1,773,227 | 0.5% | 3 |
| IDEXX LABS INC | [IDXX](https://holderbook.com/stocks/IDXX/) | $157.0M | 298,154 | 0.5% | 31 |
| SERVICENOW INC | [NOW](https://holderbook.com/stocks/NOW/) | $154.0M | 1,551,192 | 0.5% | 13 |
| SYNAPTICS INC | [SYNA](https://holderbook.com/stocks/SYNA/) | $154.0M | 1,239,622 | 0.5% | 2 |
| TEXAS INSTRS INC | [TXN](https://holderbook.com/stocks/TXN/) | $150.9M | 506,229 | 0.5% | 2 |
| SHARKNINJA INC | [SN](https://holderbook.com/stocks/SN/) | $150.3M | 986,806 | 0.5% | 9 |
| WEST PHARMACEUTICAL SVSC INC | [WST](https://holderbook.com/stocks/WST/) | $149.8M | 417,309 | 0.5% | 10 |
| GRAND CANYON ED INC | [LOPE](https://holderbook.com/stocks/LOPE/) | $148.7M | 1,038,828 | 0.4% | 5 |
| LITTELFUSE INC | [LFUS](https://holderbook.com/stocks/LFUS/) | $146.5M | 321,681 | 0.4% | 2 |
| CANADIAN NAT RES LTD MED TER | [CNQ](https://holderbook.com/stocks/CNQ/) | $143.7M | 3,635,082 | 0.4% | 1 |
| RELIANCE INC | [RS](https://holderbook.com/stocks/RS/) | $142.9M | 382,494 | 0.4% | 5 |
| TOTALENERGIES SE | [TTE](https://holderbook.com/stocks/TTE/) | $141.4M | 1,819,275 | 0.4% | 3 |
| FORGENT POWER SOLUTIONS INC | [FPS](https://holderbook.com/stocks/FPS/) | $140.6M | 2,516,270 | 0.4% | 1 |
| PTC THERAPEUTICS INC | [PTCT](https://holderbook.com/stocks/PTCT/) | $140.5M | 1,722,688 | 0.4% | 1 |
| TIMKEN CO | [TKR](https://holderbook.com/stocks/TKR/) | $138.8M | 954,839 | 0.4% | 19 |
| CYTOKINETICS INC | [CYTK](https://holderbook.com/stocks/CYTK/) | $136.6M | 1,603,442 | 0.4% | 2 |
| LINCOLN ELEC HLDGS INC | [LECO](https://holderbook.com/stocks/LECO/) | $134.6M | 506,862 | 0.4% | 3 |
| EAGLE MATLS INC | [EXP](https://holderbook.com/stocks/EXP/) | $129.8M | 576,712 | 0.4% | 31 |
| CLEAN HARBORS INC | [CLH](https://holderbook.com/stocks/CLH/) | $125.2M | 419,210 | 0.4% | 5 |
| NOVANTA INC | [NOVT](https://holderbook.com/stocks/NOVT/) | $124.3M | 765,867 | 0.4% | 31 |
| BIRKENSTOCK HOLDING PLC | [BIRK](https://holderbook.com/stocks/BIRK/) | $123.3M | 2,865,895 | 0.4% | 2 |
| FIRST HORIZON CORPORATION | [FHN](https://holderbook.com/stocks/FHN/) | $123.3M | 4,808,223 | 0.4% | 5 |
| ETSY INC | [ETSY](https://holderbook.com/stocks/ETSY/) | $120.4M | 1,598,520 | 0.4% | 1 |
| MILLICOM INTL CELLULAR S A | [TIGO](https://holderbook.com/stocks/TIGO/) | $118.9M | 1,309,545 | 0.4% | 5 |
| DIEBOLD NIXDORF INC | [DBD](https://holderbook.com/stocks/DBD/) | $117.3M | 1,379,553 | 0.4% | 9 |
| GARRETT MOTION INC | [GTX](https://holderbook.com/stocks/GTX/) | $117.1M | 3,232,883 | 0.4% | 11 |
| ENCOMPASS HEALTH CORP | [EHC](https://holderbook.com/stocks/EHC/) | $116.4M | 1,151,085 | 0.3% | 31 |
| APPFOLIO INC | [APPF](https://holderbook.com/stocks/APPF/) | $115.7M | 721,826 | 0.3% | 6 |
| MARRIOTT INTL INC NEW | [MAR](https://holderbook.com/stocks/MAR/) | $111.5M | 300,872 | 0.3% | 2 |
| NATIONAL BK HLDGS CORP | [NBHC](https://holderbook.com/stocks/NBHC/) | $111.0M | 2,497,817 | 0.3% | 2 |
| CHIPOTLE MEXICAN GRILL INC | [CMG](https://holderbook.com/stocks/CMG/) | $110.0M | 3,235,762 | 0.3% | 20 |
| SAIA INC | [SAIA](https://holderbook.com/stocks/SAIA/) | $109.1M | 259,020 | 0.3% | 2 |
| REPLIGEN CORP | [RGEN](https://holderbook.com/stocks/RGEN/) | $107.6M | 788,571 | 0.3% | 1 |
| FRESHPET INC | [FRPT](https://holderbook.com/stocks/FRPT/) | $107.1M | 1,810,994 | 0.3% | 15 |
| JAZZ PHARMACEUTICALS PLC | [JAZZ](https://holderbook.com/stocks/JAZZ/) | $105.3M | 436,893 | 0.3% | 2 |
| MARTIN MARIETTA MATLS INC | [MLM](https://holderbook.com/stocks/MLM/) | $104.9M | 181,902 | 0.3% | 31 |
| KNIGHT-SWIFT TRANSN HLDGS IN | [KNX](https://holderbook.com/stocks/KNX/) | $103.6M | 1,330,047 | 0.3% | 20 |
| WEATHERFORD INTL PLC | [WFRD](https://holderbook.com/stocks/WFRD/) | $102.8M | 1,260,878 | 0.3% | 9 |
| GLOBUS MED INC | [GMED](https://holderbook.com/stocks/GMED/) | $101.5M | 1,284,896 | 0.3% | 22 |
| NU HLDGS LTD | [NU](https://holderbook.com/stocks/NU/) | $101.5M | 7,596,051 | 0.3% | 11 |
| HUDBAY MINERALS INC | [HBM](https://holderbook.com/stocks/HBM/) | $99.5M | 4,215,842 | 0.3% | 1 |

## What the disclosed book did

Not the fund's return. This is the change in value of the positions disclosed on Form 13F, had they been left untouched, against SPY over the same quarter ends.

| Quarter | Book | Market | Difference | Priced |
|---|---|---|---|---|
| Q2 2026 | +18.3% | +14.8% | +3.5% | 100% |
| Q1 2026 | -5.7% | -4.6% | -1.0% | 100% |
| Q4 2025 | +1.1% | +2.4% | -1.3% | 100% |
| Q3 2025 | +6.3% | +7.8% | -1.6% | 100% |
| Q2 2025 | +12.3% | +10.5% | +1.8% | 100% |
| Q1 2025 | -8.8% | -4.6% | -4.3% | 100% |
| Q4 2024 | +1.0% | +2.1% | -1.2% | 100% |
| Q3 2024 | +5.5% | +5.4% | +0.1% | 100% |

## Quarter by quarter

| Quarter | Value | Positions |
|---|---|---|
| Q2 2026 | $33.3B | 403 |
| Q1 2026 | $30.3B | 413 |
| Q4 2025 | $35.9B | 413 |
| Q3 2025 | $38.7B | 414 |
| Q2 2025 | $37.7B | 417 |
| Q1 2025 | $35.6B | 423 |
| Q4 2024 | $40.9B | 433 |
| Q3 2024 | $40.5B | 412 |
| Q2 2024 | $38.1B | 411 |
| Q1 2024 | $38.7B | 410 |
| Q4 2023 | $34.4B | 406 |
| Q3 2023 | $30.1B | 398 |