William Blair Investment Management, LLC

Name: WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 13F holdings, Q4 2025
Creator: WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Published: 2026-02-09

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

In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 9, 2026), William Blair Investment Management, LLC reported 413 stock positions worth $35.9 billion. Its top holding was Nvidia (NVDA) at 5.5% of the portfolio, followed by Taiwan Semiconductor-SP ADR (TSM, 5.1%) and Microsoft (MSFT, 4.7%). Compared with Q3 2025, it opened 45 new positions, sold out of 46, added to 106 and reduced 259. The biggest buy was Alphabet Class A (GOOGL, shares +27%) and the biggest sale Sea Ltd.-ADR (SE, shares −32%).

Most Recent 13F: Q2 2026
Location: CHICAGO, IL
CIK: 0001644956
Portfolio Value: $35.9B (Q4 2025)
SEC Filing: 0001644956-26-000007 ↗ filed Feb 9, 2026

Holdings Value

Holdings 413 stocks · $35.9B


NVDA Nvidia Corp.	5.53%	10,628,667	$2.0B	Reduce -8.1%
TSM Taiwan Semiconductor-SP ADR	5.07%	5,985,330	$1.8B	Reduce -6.8%
MSFT Microsoft Corp.	4.71%	3,490,302	$1.7B	Reduce -9.0%
AAPL Apple Inc.	4.13%	5,444,328	$1.5B	Reduce -3.1%
AMZN Amazon.com Inc.	2.82%	4,387,003	$1.0B	Reduce -0.8%
GOOGL Alphabet Inc. Class A	2.75%	3,154,973	$987.5M	Add +26.9%
AVGO Broadcom Inc.	2.45%	2,536,611	$877.9M	Reduce -9.8%
META Meta Platforms Inc. Class A	2.19%	1,186,769	$783.4M	Add +0.1%
MA Mastercard Inc. Class A	1.73%	1,084,947	$619.4M	Reduce -1.9%
CG The Carlyle Group Inc.	1.18%	7,131,902	$421.6M	Reduce -18.5%
TRU Transunion	0.95%	3,965,495	$340.0M	Reduce -15.3%
MELI MercadoLibre Inc.	0.93%	165,579	$333.5M	Reduce -27.9%
NOW ServiceNow Inc.	0.92%	2,148,780	$329.2M	Add +14.9%
NU Nu Holdings Ltd./Cayman Isl-A filed as NU HLDGS LTD	0.87%	18,699,367	$313.0M	Reduce -3.9%
SE Sea Ltd.-ADR	0.84%	2,370,876	$302.4M	Reduce -31.6%
IDXX Idexx Laboratories Inc.	0.83%	441,324	$298.6M	Reduce -3.9%
SNOW Snowflake Inc.	0.82%	1,346,998	$295.5M	Add +159.9%
INTU Intuit Inc.	0.82%	442,391	$293.0M	Reduce -9.2%
MNST Monster Beverage Corp.	0.80%	3,761,249	$288.4M	Add +25.4%
AMD Advanced Micro Devices	0.80%	1,339,546	$286.9M	Add +27.9%
COST Costco Wholesale Corp.	0.79%	328,468	$283.3M	Add +1.8%
A Agilent Technologies Inc.	0.78%	2,063,009	$280.7M	Reduce -3.8%
LIN Linde PLC	0.77%	643,470	$274.4M	Add +19.7%
ONTO Onto Innovation Inc.	0.76%	1,726,587	$272.6M	Reduce -12.9%
ORLY O'reilly Automotive Inc.	0.76%	2,981,507	$271.9M	Add +2.3%
ITUB Itau Unibanco H-Spon PRF ADR	0.73%	36,551,763	$261.7M	Add +24.0%
CIEN Ciena Corp.	0.72%	1,098,593	$256.9M	Reduce -55.0%
UNH Unitedhealth Group Inc.	0.70%	762,243	$251.6M	Reduce -0.8%
P Everpure Inc. Class A filed as PURE STORAGE INC	0.70%	3,742,928	$250.8M	Reduce -19.8%
ORCL Oracle Corp.	0.68%	1,256,536	$244.9M	Add +13.4%
DOCS Doximity Inc. Class A	0.67%	5,456,985	$241.6M	Reduce -6.4%
TYL Tyler Technologies Inc.	0.63%	495,297	$224.8M	Add +7.9%
BAP Credicorp Ltd.	0.61%	767,413	$220.2M	Reduce -6.4%
GMED Globus Medical Inc. Class A	0.61%	2,519,782	$220.0M	Reduce -10.6%
TLN Talen Energy Corp.	0.60%	569,399	$213.4M	Reduce -16.2%
INSM Insmed Inc.	0.59%	1,221,096	$212.5M	Reduce -21.5%
PRMB Primo Brands Corp.	0.58%	12,627,420	$206.5M	Add +6.7%
MDGL Madrigal Pharmaceuticals Inc.	0.58%	354,220	$206.3M	Reduce -14.0%
MLI Mueller Industries Inc.	0.57%	1,779,906	$204.3M	Reduce -10.8%
EG Everest Group Ltd.	0.55%	584,301	$198.3M	Reduce -10.3%
VEEV Veeva Systems Inc. Class A	0.55%	881,223	$196.7M	Add +17.7%
QTWO Q2 Holdings Inc. filed as Q2 HLDGS INC	0.54%	2,694,718	$194.5M	Add +25.9%
BWXT BWX Technologies Inc.	0.53%	1,107,600	$191.4M	Reduce -11.8%
TWST Twist Bioscience Corp.	0.53%	5,954,429	$188.9M	Add +43.8%
ARGX Argenx SE - ADR	0.52%	223,666	$188.1M	New
BWIN Baldwin Insurance Group Inc./ filed as THE BALDWIN INSURANCE GRP IN	0.51%	7,543,813	$181.3M	Add +47.8%
CCJ Cameco Corp.	0.51%	1,980,827	$181.2M	Reduce -24.9%
BCO The Brink's Co.	0.50%	1,544,641	$180.3M	Reduce -12.7%
CPRT Copart Inc.	0.50%	4,585,833	$179.5M	Reduce -1.4%
WAY Waystar Holding Corp.	0.48%	5,282,220	$173.0M	Add +0.4%
HQY Healthequity Inc.	0.47%	1,855,208	$170.0M	New
MLM Martin Marietta Materials	0.47%	270,203	$168.2M	Reduce -2.6%
COHR Coherent Corp.	0.45%	873,060	$161.1M	Reduce -36.0%
PLNT Planet Fitness Inc. Class A	0.44%	1,459,295	$158.3M	Reduce -8.4%
LSCC Lattice Semiconductor Corp.	0.44%	2,125,260	$156.4M	Add +52.5%
CW Curtiss-Wright Corp.	0.43%	277,837	$153.2M	Reduce -10.4%
DCI Donaldson Co. Inc.	0.42%	1,707,872	$151.4M	Add +26235.7%
FOLD Amicus Therapeutics Inc.	0.42%	10,627,717	$151.3M	Reduce -32.5%
APPF Appfolio Inc. Class A	0.41%	638,241	$148.5M	Add +15.6%
CHE Chemed Corp.	0.41%	344,807	$147.5M	Reduce -10.5%
LECO Lincoln Electric Holdings	0.41%	609,812	$146.1M	New
WAL Western Alliance Bancorp	0.40%	1,711,503	$143.9M	Reduce -28.5%
CWST Casella Waste Systems Inc. Class A	0.40%	1,468,206	$143.8M	Reduce -18.9%
CAVA Cava Group Inc.	0.40%	2,419,247	$142.0M	Add +28.1%
CWAN Clearwater Analytics HDS-A	0.40%	5,880,506	$141.8M	Reduce -31.4%
TECH Bio-Techne Corp.	0.39%	2,398,265	$141.0M	Add +40.3%
FFIV F5 Inc.	0.39%	550,264	$140.5M	New
NVT Nvent Electric PLC	0.39%	1,375,159	$140.2M	Reduce -42.7%
DT Dynatrace Inc.	0.39%	3,215,853	$139.4M	Reduce -5.4%
SN Sharkninja Inc.	0.39%	1,236,321	$138.3M	Reduce -10.5%
ONB Old National Bancorp	0.37%	5,957,936	$132.9M	Add +1.5%
TER Teradyne Inc.	0.37%	684,578	$132.5M	Reduce -11.7%
CRS Carpenter Technology	0.37%	417,559	$131.5M	Reduce -10.4%
CHDN Churchill Downs Inc.	0.36%	1,145,413	$130.3M	Add +12.6%
SPOT Spotify Technology SA	0.36%	221,748	$128.8M	Reduce -21.5%
FHN First Horizon Corp.	0.36%	5,336,021	$127.5M	Add +2.2%
GKOS Glaukos Corp.	0.35%	1,106,918	$125.0M	Add +1.2%
HALO Halozyme Therapeutics Inc.	0.35%	1,842,956	$124.0M	New
CMG Chipotle Mexican Grill Inc.	0.34%	3,313,041	$122.6M	Reduce -34.0%
DBD Diebold Nixdorf Inc.	0.34%	1,802,571	$122.4M	Reduce -0.9%
FRPT Freshpet Inc.	0.33%	1,952,767	$119.0M	Add +30.9%
POOL Pool Corp.	0.33%	519,836	$118.9M	Reduce -6.4%
NXT Nextpower Inc.	0.33%	1,362,794	$118.7M	Reduce -7.3%
EYE National Vision Holdings Inc.	0.32%	4,510,895	$116.5M	Reduce -6.8%
EXP Eagle Materials Inc.	0.32%	558,744	$115.5M	Reduce -9.2%
BFAM Bright Horizons Family Solut	0.32%	1,129,039	$114.5M	Reduce -10.8%
MANH Manhattan Associates Inc.	0.32%	660,294	$114.4M	Reduce -11.7%
OWL Blue Owl Capital Inc.	0.32%	7,615,956	$113.8M	New
GRAB Grab Holdings Ltd. Class A	0.32%	22,676,283	$113.2M	Reduce -6.5%
EVR Evercore Inc. Class A	0.31%	331,027	$112.6M	Reduce -11.3%
EXLS Exlservice Holdings Inc.	0.31%	2,584,072	$109.7M	Reduce -10.8%
NOVT Novanta Inc.	0.30%	908,906	$108.2M	Reduce -5.4%
PEN Penumbra Inc.	0.30%	345,974	$107.6M	New
INSP Inspire Medical Systems Inc.	0.30%	1,161,285	$107.1M	Reduce -10.5%
RRX Regal Rexnord Corp.	0.30%	759,283	$106.5M	Add +88.4%
GTX Garrett Motion Inc.	0.29%	6,059,287	$105.6M	Reduce -21.5%
WGS Genedx Holdings Corp.	0.29%	809,210	$105.2M	Reduce -33.7%
CART Maplebear Inc.	0.28%	2,220,018	$99.9M	Reduce -30.1%
BSY Bentley Systems Inc. Class B	0.28%	2,615,173	$99.8M	Reduce -10.8%
WMS Advanced Drainage Systems Inc.	0.28%	688,047	$99.6M	Reduce -16.1%

Show all 413 holdings

Portfolio Sells Q3 2025 → Q4 2025


SE Sea Ltd.-ADR	Reduce -31.6%	0.84%	−0.76
UBER Uber Technologies Inc.	Reduce -97.9%	0.01%	−0.66
LYV Live Nation Entertainment Inc.	Sold out	0.00%	−0.59
LRCX Lam Research Corp.	Reduce -94.0%	0.05%	−0.59
LRN Stride Inc.	Sold out	0.00%	−0.58
RY Royal Bank of Canada	Reduce -99.2%	0.01%	−0.54
MELI MercadoLibre Inc.	Reduce -27.9%	0.93%	−0.46
CFLT Confluent Inc. Class A	Sold out	0.00%	−0.44
MSFT Microsoft Corp.	Reduce -9.0%	4.71%	−0.43
DOCS Doximity Inc. Class A	Reduce -6.4%	0.67%	−0.43
FTAI Ftai Aviation Ltd.	Sold out	0.00%	−0.39
EXAS Exact Sciences Corp.	Sold out	0.00%	−0.36
CRM Salesforce Inc.	Reduce -94.9%	0.02%	−0.33
P Everpure Inc. Class A	Reduce -19.8%	0.70%	−0.31
MRCY Mercury Systems Inc.	Reduce -60.4%	0.20%	−0.30
RACE Ferrari NV	Reduce -45.5%	0.22%	−0.27
CG The Carlyle Group Inc.	Reduce -18.5%	1.18%	−0.24
NVT Nvent Electric PLC	Reduce -42.7%	0.39%	−0.22
CIEN Ciena Corp.	Reduce -55.0%	0.72%	−0.20
FLUT Flutter Entertainment PLC-Di	Sold out	0.00%	−0.20
BAM Brookfield Asset Mgmt-A	Reduce -42.2%	0.27%	−0.20
CPNG Coupang Inc.	Sold out	0.00%	−0.18
MMYT Makemytrip Ltd.	Reduce -93.6%	0.01%	−0.18
ASO Academy Sports & Outdoors Inc.	Sold out	0.00%	−0.17
CMG Chipotle Mexican Grill Inc.	Reduce -34.0%	0.34%	−0.17
TLN Talen Energy Corp.	Reduce -16.2%	0.60%	−0.15
WSC Willscot Holdings Corp.	Reduce -50.2%	0.14%	−0.15
SPOT Spotify Technology SA	Reduce -21.5%	0.36%	−0.15
WAL Western Alliance Bancorp	Reduce -28.5%	0.40%	−0.14
FOXF Fox Factory Holding Corp.	Sold out	0.00%	−0.14
GOGO Gogo Inc.	Reduce -99.6%	0.00%	−0.13
PODD Insulet Corp.	Reduce -50.3%	0.12%	−0.12
POOL Pool Corp.	Reduce -6.4%	0.33%	−0.11
CP Canadian Pacific Kansas City	Sold out	0.00%	−0.11
BSY Bentley Systems Inc. Class B	Reduce -10.8%	0.28%	−0.11
PSN Parsons Corp.	Reduce -11.7%	0.27%	−0.11
RUSHA Rush Enterprises Inc. Class A	Reduce -76.7%	0.03%	−0.10
ONT Onterris Inc.	Sold out	0.00%	−0.09
VRNS Varonis Systems Inc.	Sold out	0.00%	−0.09
EVH Evolent Health Inc. Class A	Sold out	0.00%	−0.09
NEOG Neogen Corp.	Sold out	0.00%	−0.09
MANH Manhattan Associates Inc.	Reduce -11.7%	0.32%	−0.08
NBIS Nebius Group NV	Sold out	0.00%	−0.07
BRBR Bellring Brands Inc.	Reduce -11.6%	0.17%	−0.07
SIG Signet Jewelers Ltd.	Sold out	0.00%	−0.07
CCJ Cameco Corp.	Reduce -24.9%	0.51%	−0.07
BV Brightview Holdings Inc.	Sold out	0.00%	−0.07
COLB Columbia Banking System Inc.	Reduce -98.8%	0.00%	−0.07
TRU Transunion	Reduce -15.3%	0.95%	−0.07
SITM Sitime Corp.	Sold out	0.00%	−0.06

Portfolio Buys Q3 2025 → Q4 2025


GOOGL Alphabet Inc. Class A	Add +26.9%	2.75%	+1.19
ARGX Argenx SE - ADR	New	0.52%	+0.52
SNOW Snowflake Inc.	Add +159.9%	0.82%	+0.52
HQY Healthequity Inc.	New	0.47%	+0.47
DCI Donaldson Co. Inc.	Add +26235.7%	0.42%	+0.42
LECO Lincoln Electric Holdings	New	0.41%	+0.41
FFIV F5 Inc.	New	0.39%	+0.39
AMD Advanced Micro Devices	Add +27.9%	0.80%	+0.36
HALO Halozyme Therapeutics Inc.	New	0.35%	+0.35
OWL Blue Owl Capital Inc.	New	0.32%	+0.32
PEN Penumbra Inc.	New	0.30%	+0.30
MNST Monster Beverage Corp.	Add +25.4%	0.80%	+0.28
VRSK Verisk Analytics Inc.	New	0.25%	+0.25
TWST Twist Bioscience Corp.	Add +43.8%	0.53%	+0.23
CHRW C.H. Robinson Worldwide Inc.	New	0.20%	+0.20
KRYS Krystal Biotech Inc.	Add +152.1%	0.26%	+0.19
LSCC Lattice Semiconductor Corp.	Add +52.5%	0.44%	+0.17
ITUB Itau Unibanco H-Spon PRF ADR	Add +24.0%	0.73%	+0.17
MRX Marex UK Holdings Ltd.	Add +372.0%	0.19%	+0.15
RRX Regal Rexnord Corp.	Add +88.4%	0.30%	+0.15
TECH Bio-Techne Corp.	Add +40.3%	0.39%	+0.15
FLS Flowserve Corp.	Add +142.4%	0.20%	+0.14
LOPE Grand Canyon Education Inc.	Add +281.9%	0.21%	+0.14
QTWO Q2 Holdings Inc.	Add +25.9%	0.54%	+0.14
OSIS Osi Systems Inc.	New	0.14%	+0.14
BWIN Baldwin Insurance Group Inc./	Add +47.8%	0.51%	+0.13
FRPT Freshpet Inc.	Add +30.9%	0.33%	+0.12
GKOS Glaukos Corp.	Add +1.2%	0.35%	+0.12
CHDN Churchill Downs Inc.	Add +12.6%	0.36%	+0.11
LAUR Laureate Education Inc.	Add +52.6%	0.25%	+0.11
LTM Latam Airlines Group SA-ADR	New	0.11%	+0.11
LIN Linde PLC	Add +19.7%	0.77%	+0.11
CAVA Cava Group Inc.	Add +28.1%	0.40%	+0.10
LB Landbridge Co. LLC-A	New	0.09%	+0.09
SLVM Sylvamo Corp.	New	0.09%	+0.09
BE Bloom Energy Corp. Class A	New	0.08%	+0.08
RVLV Revolve Group Inc. Class A	Add +16.6%	0.18%	+0.08
ESNT Essent Group Ltd.	New	0.08%	+0.08
FBK FB Financial Corp.	New	0.08%	+0.08
NWN Northwest Natural Holding Co.	New	0.07%	+0.07
VVX V2X Inc.	New	0.07%	+0.07
VITL Vital Farms Inc.	New	0.07%	+0.07
LLY Eli Lilly & Co.	Add +108.2%	0.10%	+0.07
ESAB Esab Corp.	New	0.06%	+0.06
BGSI Boyd Group Services Inc.	New	0.06%	+0.06
RS Reliance Inc.	Add +24.7%	0.23%	+0.06
LOB Live Oak Bancshares Inc.	New	0.06%	+0.06
CARG Cargurus Inc.	New	0.06%	+0.06
KWR Quaker Chemical Corporation	Add +33.6%	0.18%	+0.06
WH Wyndham Hotels & Resorts Inc.	New	0.06%	+0.06

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