William Blair Investment Management, LLC

Name: WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 13F holdings, Q3 2025
Creator: WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Published: 2025-11-12

Q2 2026Q1 2026Q4 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024

In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 12, 2025), William Blair Investment Management, LLC reported 414 stock positions worth $38.7 billion. Its top holding was Nvidia (NVDA) at 5.6% of the portfolio, followed by Microsoft (MSFT, 5.1%) and Taiwan Semiconductor-SP ADR (TSM, 4.6%). Compared with Q2 2025, it opened 45 new positions, sold out of 48, added to 110 and reduced 257. The biggest buy was Alphabet Class A (GOOGL, shares +592%) and the biggest sale Datadog Class A (DDOG, shares −100%).

Most Recent 13F: Q2 2026
Location: CHICAGO, IL
CIK: 0001644956
Portfolio Value: $38.7B (Q3 2025)
SEC Filing: 0001644956-25-000045 ↗ filed Nov 12, 2025

Holdings Value

Holdings 414 stocks · $38.7B


NVDA Nvidia Corp.	5.58%	11,569,001	$2.2B	Reduce -5.7%
MSFT Microsoft Corp.	5.14%	3,836,826	$2.0B	Reduce -3.6%
TSM Taiwan Semiconductor-SP ADR	4.64%	6,422,158	$1.8B	Reduce -3.0%
AAPL Apple Inc.	3.70%	5,620,453	$1.4B	Add +7.0%
AMZN Amazon.com Inc.	2.51%	4,421,161	$970.8M	Reduce -18.1%
AVGO Broadcom Inc.	2.40%	2,811,124	$927.4M	Reduce -5.0%
META Meta Platforms Inc. Class A	2.25%	1,186,127	$871.1M	Reduce -17.0%
MA Mastercard Inc. Class A	1.63%	1,105,345	$628.7M	Reduce -9.4%
SE Sea Ltd.-ADR	1.60%	3,463,532	$619.0M	Reduce -3.5%
GOOGL Alphabet Inc. Class A	1.56%	2,486,002	$604.3M	Add +592.0%
CG The Carlyle Group Inc.	1.42%	8,748,975	$548.6M	Reduce -12.1%
MELI MercadoLibre Inc.	1.39%	229,804	$537.0M	Reduce -3.7%
DOCS Doximity Inc. Class A	1.10%	5,829,169	$426.4M	Add +11.7%
TRU Transunion	1.01%	4,678,809	$392.0M	Reduce -1.3%
P Everpure Inc. Class A filed as PURE STORAGE INC	1.01%	4,666,892	$391.1M	Reduce -5.3%
CIEN Ciena Corp.	0.92%	2,440,888	$355.6M	Reduce -9.9%
NOW ServiceNow Inc.	0.89%	374,010	$344.2M	Add +6.7%
INTU Intuit Inc.	0.86%	487,232	$332.7M	Reduce -5.8%
ORLY O'reilly Automotive Inc.	0.81%	2,915,674	$314.3M	Reduce -17.7%
ORCL Oracle Corp.	0.81%	1,107,586	$311.5M	Add +28.6%
NU Nu Holdings Ltd./Cayman Isl-A filed as NU HLDGS LTD	0.81%	19,449,424	$311.4M	Add +182.9%
COST Costco Wholesale Corp.	0.77%	322,740	$298.7M	Reduce -14.3%
IDXX Idexx Laboratories Inc.	0.76%	459,019	$293.3M	Reduce -33.0%
TLN Talen Energy Corp.	0.75%	679,697	$289.1M	Reduce -38.3%
A Agilent Technologies Inc.	0.71%	2,144,086	$275.2M	Reduce -3.2%
UNH Unitedhealth Group Inc.	0.69%	768,535	$265.4M	Add +12.3%
PRMB Primo Brands Corp.	0.68%	11,834,384	$261.5M	Add +11.6%
UBER Uber Technologies Inc.	0.67%	2,644,874	$259.1M	Reduce -3.9%
ONTO Onto Innovation Inc.	0.66%	1,981,761	$256.1M	Add +80.3%
LIN Linde PLC	0.66%	537,411	$255.3M	Reduce -11.0%
LRCX Lam Research Corp.	0.64%	1,843,616	$246.9M	Reduce -3.4%
TYL Tyler Technologies Inc.	0.62%	459,114	$240.2M	Add +28.1%
NVT Nvent Electric PLC	0.61%	2,400,379	$236.8M	Reduce -22.9%
BWXT BWX Technologies Inc.	0.60%	1,255,310	$231.4M	Reduce -17.3%
LYV Live Nation Entertainment Inc.	0.59%	1,400,174	$228.8M	Reduce -13.8%
EG Everest Group Ltd.	0.59%	651,474	$228.2M	Reduce -5.0%
LRN Stride Inc.	0.58%	1,511,080	$225.1M	Add +37.2%
INSM Insmed Inc.	0.58%	1,555,057	$223.9M	Reduce -6.6%
VEEV Veeva Systems Inc. Class A	0.58%	748,644	$223.0M	Add +21.4%
CCJ Cameco Corp.	0.57%	2,638,033	$221.2M	Reduce -31.8%
BAP Credicorp Ltd.	0.56%	820,073	$218.4M	Add +71.7%
ITUB Itau Unibanco H-Spon PRF ADR	0.56%	29,470,195	$216.3M	Add +0.7%
RY Royal Bank of Canada	0.55%	1,433,452	$211.2M	Add +5.9%
CPRT Copart Inc.	0.54%	4,651,474	$209.2M	Add +7.8%
WAL Western Alliance Bancorp	0.54%	2,394,722	$207.7M	Add +3.5%
BCO The Brink's Co.	0.53%	1,769,867	$206.8M	Reduce -9.8%
MNST Monster Beverage Corp.	0.52%	2,999,718	$201.9M	Reduce -4.6%
MLI Mueller Industries Inc.	0.52%	1,994,875	$201.7M	Reduce -14.0%
WAY Waystar Holding Corp.	0.52%	5,263,187	$199.6M	Add +0.5%
SPOT Spotify Technology SA	0.51%	282,324	$197.1M	Reduce -24.1%
CMG Chipotle Mexican Grill Inc.	0.51%	5,023,703	$196.9M	Reduce -20.0%
MRCY Mercury Systems Inc.	0.50%	2,487,957	$192.6M	Reduce -47.0%
RACE Ferrari NV	0.49%	394,449	$191.4M	Reduce -8.4%
MDGL Madrigal Pharmaceuticals Inc.	0.49%	411,802	$188.9M	Add +17.6%
BAM Brookfield Asset Mgmt-A	0.47%	3,177,123	$180.9M	Reduce -5.0%
MLM Martin Marietta Materials	0.45%	277,356	$174.8M	Reduce -3.3%
CHE Chemed Corp.	0.45%	385,124	$172.4M	Add +13.6%
POOL Pool Corp.	0.45%	555,230	$172.2M	Reduce -5.3%
CWST Casella Waste Systems Inc. Class A	0.44%	1,809,867	$171.7M	Add +0.5%
CFLT Confluent Inc. Class A	0.44%	8,569,807	$169.7M	Reduce -11.1%
AMD Advanced Micro Devices	0.44%	1,047,200	$169.4M	Add +72.5%
CW Curtiss-Wright Corp.	0.44%	310,092	$168.4M	Reduce -14.4%
PLNT Planet Fitness Inc. Class A	0.43%	1,593,907	$165.4M	Reduce -8.3%
DT Dynatrace Inc.	0.43%	3,397,838	$164.6M	Reduce -18.4%
GMED Globus Medical Inc. Class A	0.42%	2,819,165	$161.5M	Add +17.2%
QTWO Q2 Holdings Inc. filed as Q2 HLDGS INC	0.40%	2,141,005	$155.0M	Add +8.9%
CWAN Clearwater Analytics HDS-A	0.40%	8,576,372	$154.5M	Reduce -2.7%
MANH Manhattan Associates Inc.	0.40%	747,928	$153.3M	Reduce -17.7%
APPF Appfolio Inc. Class A	0.39%	551,969	$152.2M	Reduce -24.7%
BSY Bentley Systems Inc. Class B	0.39%	2,931,296	$150.9M	New
FTAI Ftai Aviation Ltd.	0.39%	902,875	$150.7M	Reduce -30.4%
COHR Coherent Corp.	0.38%	1,365,017	$147.0M	Add +225.7%
PSN Parsons Corp.	0.38%	1,764,619	$146.3M	Reduce -6.6%
GRAB Grab Holdings Ltd. Class A	0.38%	24,264,548	$146.1M	Add +14.7%
BWIN Baldwin Insurance Group Inc./ filed as THE BALDWIN INSURANCE GRP IN	0.37%	5,104,695	$144.0M	Reduce -5.5%
EXP Eagle Materials Inc.	0.37%	615,250	$143.4M	Add +0.6%
SN Sharkninja Inc.	0.37%	1,381,451	$142.5M	Reduce -37.0%
EYE National Vision Holdings Inc.	0.37%	4,840,473	$141.3M	Add +36.0%
EXAS Exact Sciences Corp.	0.36%	2,555,051	$139.8M	Add +26.5%
BFAM Bright Horizons Family Solut	0.36%	1,265,118	$137.4M	Reduce -12.5%
CRM Salesforce Inc.	0.35%	568,366	$134.7M	Reduce -25.1%
WGS Genedx Holdings Corp.	0.34%	1,220,138	$131.5M	Reduce -25.2%
ONB Old National Bancorp	0.33%	5,869,840	$128.8M	Add +12.3%
EXLS Exlservice Holdings Inc.	0.33%	2,897,088	$127.6M	Reduce -9.1%
EVR Evercore Inc. Class A	0.33%	373,148	$125.9M	Reduce -5.5%
FOLD Amicus Therapeutics Inc.	0.32%	15,749,240	$124.1M	Add +7.6%
FHN First Horizon Corp.	0.31%	5,219,830	$118.0M	Add +38.7%
MZTI The Marzetti Company	0.30%	680,240	$117.5M	Reduce -22.1%
SNOW Snowflake Inc.	0.30%	518,209	$116.9M	New
CART Maplebear Inc.	0.30%	3,177,828	$116.8M	Reduce -5.0%
TWST Twist Bioscience Corp.	0.30%	4,142,283	$116.6M	Add +6.0%
CRS Carpenter Technology	0.30%	466,244	$114.5M	Reduce -4.4%
CAVA Cava Group Inc.	0.29%	1,888,723	$114.1M	New
WMS Advanced Drainage Systems Inc.	0.29%	820,203	$113.8M	Reduce -12.2%
ACVA Acv Auctions Inc. Class A	0.29%	11,471,709	$113.7M	Add +3.3%
WSC Willscot Holdings Corp.	0.29%	5,317,291	$112.2M	Reduce -2.7%
NXT Nextpower Inc. filed as NEXTRACKER INC	0.28%	1,469,638	$108.7M	New
TER Teradyne Inc.	0.28%	775,463	$106.7M	New
GTX Garrett Motion Inc.	0.27%	7,715,824	$105.1M	Add +51.0%
DBD Diebold Nixdorf Inc.	0.27%	1,819,728	$103.8M	Add +12.2%

Show all 414 holdings

Portfolio Sells Q2 2025 → Q3 2025


DDOG Datadog Inc. Class A	Reduce -99.8%	0.00%	−0.77
AMZN Amazon.com Inc.	Reduce -18.1%	2.51%	−0.63
META Meta Platforms Inc. Class A	Reduce -17.0%	2.25%	−0.55
CMG Chipotle Mexican Grill Inc.	Reduce -20.0%	0.51%	−0.43
EPAM Epam Systems Inc.	Sold out	0.00%	−0.40
APO Apollo Global Management Inc.	Reduce -99.3%	0.00%	−0.35
FLUT Flutter Entertainment PLC-Di	Reduce -54.1%	0.20%	−0.31
MELI MercadoLibre Inc.	Reduce -3.7%	1.39%	−0.27
PODD Insulet Corp.	Reduce -49.7%	0.23%	−0.25
SPOT Spotify Technology SA	Reduce -24.1%	0.51%	−0.25
NICE Nice Ltd. - Spon ADR	Sold out	0.00%	−0.25
BWIN Baldwin Insurance Group Inc./	Reduce -5.5%	0.37%	−0.24
PCTY Paylocity Holding Corp.	Reduce -99.5%	0.00%	−0.23
INTU Intuit Inc.	Reduce -5.8%	0.86%	−0.22
IDXX Idexx Laboratories Inc.	Reduce -33.0%	0.76%	−0.22
COST Costco Wholesale Corp.	Reduce -14.3%	0.77%	−0.22
SN Sharkninja Inc.	Reduce -37.0%	0.37%	−0.21
CB Chubb Ltd.	Sold out	0.00%	−0.21
CRM Salesforce Inc.	Reduce -25.1%	0.35%	−0.20
CFLT Confluent Inc. Class A	Reduce -11.1%	0.44%	−0.20
BURL Burlington Stores Inc.	Sold out	0.00%	−0.20
MA Mastercard Inc. Class A	Reduce -9.4%	1.63%	−0.19
CCJ Cameco Corp.	Reduce -31.8%	0.57%	−0.19
EHC Encompass Health Corp.	Reduce -42.0%	0.26%	−0.19
WST West Pharmaceutical Services	Reduce -88.9%	0.03%	−0.18
DT Dynatrace Inc.	Reduce -18.4%	0.43%	−0.18
MRCY Mercury Systems Inc.	Reduce -47.0%	0.50%	−0.17
WCN Waste Connections Inc.	Sold out	0.00%	−0.17
HDB HDFC Bank Ltd.-ADR	Reduce -78.3%	0.04%	−0.17
IBN Icici Bank Ltd.-Spon ADR	Reduce -45.3%	0.15%	−0.16
GGAL Grupo Financiero Galicia-ADR	Sold out	0.00%	−0.14
WNS WNS Holdings Ltd.	Sold out	0.00%	−0.13
TBBB BBB Foods Inc. Class A	Reduce -67.0%	0.06%	−0.13
BFAM Bright Horizons Family Solut	Reduce -12.5%	0.36%	−0.12
MSFT Microsoft Corp.	Reduce -3.6%	5.14%	−0.12
CWAN Clearwater Analytics HDS-A	Reduce -2.7%	0.40%	−0.11
WSC Willscot Holdings Corp.	Reduce -2.7%	0.29%	−0.11
TLN Talen Energy Corp.	Reduce -38.3%	0.75%	−0.10
CART Maplebear Inc.	Reduce -5.0%	0.30%	−0.10
MZTI The Marzetti Company	Reduce -22.1%	0.30%	−0.10
INFY Infosys Ltd.-SP ADR	Sold out	0.00%	−0.10
TRU Transunion	Reduce -1.3%	1.01%	−0.09
LIN Linde PLC	Reduce -11.0%	0.66%	−0.09
FROG Jfrog Ltd.	Sold out	0.00%	−0.09
NOVT Novanta Inc.	Reduce -2.0%	0.25%	−0.09
MMYT Makemytrip Ltd.	Reduce -26.3%	0.19%	−0.09
VITL Vital Farms Inc.	Sold out	0.00%	−0.08
GKOS Glaukos Corp.	Reduce -3.7%	0.23%	−0.08
MANH Manhattan Associates Inc.	Reduce -17.7%	0.40%	−0.08
VIST Vista Energy Sab DE CV	Sold out	0.00%	−0.08

Portfolio Buys Q2 2025 → Q3 2025


GOOGL Alphabet Inc. Class A	Add +592.0%	1.56%	+1.39
AAPL Apple Inc.	Add +7.0%	3.70%	+0.84
NU Nu Holdings Ltd./Cayman Isl-A	Add +182.9%	0.81%	+0.55
BSY Bentley Systems Inc. Class B	New	0.39%	+0.39
ONTO Onto Innovation Inc.	Add +80.3%	0.66%	+0.37
ORCL Oracle Corp.	Add +28.6%	0.81%	+0.31
SNOW Snowflake Inc.	New	0.30%	+0.30
CAVA Cava Group Inc.	New	0.29%	+0.29
NXT Nextpower Inc.	New	0.28%	+0.28
BAP Credicorp Ltd.	Add +71.7%	0.56%	+0.28
COHR Coherent Corp.	Add +225.7%	0.38%	+0.28
TER Teradyne Inc.	New	0.28%	+0.28
LSCC Lattice Semiconductor Corp.	New	0.26%	+0.26
DOCS Doximity Inc. Class A	Add +11.7%	1.10%	+0.25
TME Tencent Music Entertainm-ADR	New	0.23%	+0.23
AMD Advanced Micro Devices	Add +72.5%	0.44%	+0.21
MDGL Madrigal Pharmaceuticals Inc.	Add +17.6%	0.49%	+0.21
IWF iShares Russell 1000 Growth	New	0.20%	+0.20
CADE Cadence Bank	Add +196.8%	0.25%	+0.17
LRN Stride Inc.	Add +37.2%	0.58%	+0.16
RRX Regal Rexnord Corp.	New	0.15%	+0.15
EYE National Vision Holdings Inc.	Add +36.0%	0.37%	+0.15
FN Fabrinet	Add +154.5%	0.21%	+0.14
LAUR Laureate Education Inc.	New	0.14%	+0.14
GTX Garrett Motion Inc.	Add +51.0%	0.27%	+0.13
KWR Quaker Chemical Corporation	New	0.12%	+0.12
UNH Unitedhealth Group Inc.	Add +12.3%	0.69%	+0.12
TECH Bio-Techne Corp.	Add +75.9%	0.25%	+0.11
VEEV Veeva Systems Inc. Class A	Add +21.4%	0.58%	+0.11
CPNG Coupang Inc.	Add +114.6%	0.18%	+0.10
FOLD Amicus Therapeutics Inc.	Add +7.6%	0.32%	+0.10
GRAB Grab Holdings Ltd. Class A	Add +14.7%	0.38%	+0.10
PI Impinj Inc.	New	0.09%	+0.09
FHN First Horizon Corp.	Add +38.7%	0.31%	+0.09
XP XP Inc. Class A	New	0.09%	+0.09
PWP Perella Weinberg Partners	Add +57.2%	0.20%	+0.08
HAYW Hayward Holdings Inc.	New	0.08%	+0.08
RMBS Rambus Inc.	New	0.08%	+0.08
MOD Modine Manufacturing Co.	Add +58.9%	0.14%	+0.08
EXAS Exact Sciences Corp.	Add +26.5%	0.36%	+0.08
UMBF Umb Financial Corp.	New	0.08%	+0.08
USPH U.S. Physical Therapy Inc.	New	0.08%	+0.08
CLS Celestica Inc.	New	0.07%	+0.07
ITGR Integer Holdings Corp.	New	0.07%	+0.07
RY Royal Bank of Canada	Add +5.9%	0.55%	+0.07
NBIS Nebius Group NV	New	0.07%	+0.07
SKY Champion Homes Inc.	Add +30.9%	0.20%	+0.07
AEHR Aehr Test Systems	New	0.07%	+0.07
STRL Sterling Infrastructure Inc.	New	0.07%	+0.07
BV Brightview Holdings Inc.	New	0.07%	+0.07

All Filings

Quarter	Positions	13F Reported Value	Top Holdings
Q2 2026	403	$33.3B	TSM, NVDA, GOOGL, AAPL, AVGO
Q1 2026	413	$30.3B	TSM, NVDA, AAPL, MSFT, GOOGL
Q4 2025	413	$35.9B	NVDA, TSM, MSFT, AAPL, AMZN
Q3 2025	414	$38.7B	NVDA, MSFT, TSM, AAPL, AMZN
Q2 2025	417	$37.7B	MSFT, NVDA, TSM, AMZN, AAPL
Q1 2025	423	$35.6B	MSFT, NVDA, TSM, AMZN, AAPL
Q4 2024	433	$40.9B	MSFT, NVDA, TSM, AMZN, AAPL
Q3 2024	412	$40.5B	MSFT, NVDA, TSM, AAPL, AMZN
Q2 2024	411	$38.1B	MSFT, NVDA, TSM, GOOGL, AMZN
Q1 2024	410	$38.7B	MSFT, TSM, GOOGL, AMZN, NVDA