William Blair Investment Management, LLC

Name: WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 13F holdings, Q1 2025
Creator: WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Published: 2025-05-09

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

In its 13F for Q1 2025 (holdings as of March 31, 2025, filed May 9, 2025), William Blair Investment Management, LLC reported 423 stock positions worth $35.6 billion. Its top holding was Microsoft (MSFT) at 4.3% of the portfolio, followed by Nvidia (NVDA, 3.7%) and Taiwan Semiconductor-SP ADR (TSM, 3.4%). Compared with Q4 2024, it opened 36 new positions, sold out of 46, added to 114 and reduced 269. The biggest buy was Broadcom (AVGO, shares +375%) and the biggest sale Nvidia (NVDA, shares −8%).

Most Recent 13F: Q2 2026
Location: CHICAGO, IL
CIK: 0001644956
Portfolio Value: $35.6B (Q1 2025)
SEC Filing: 0001644956-25-000018 ↗ filed May 9, 2025

Holdings Value

Holdings 423 stocks · $35.6B


MSFT Microsoft Corp.	4.35%	4,127,203	$1.5B	Reduce -6.9%
NVDA Nvidia Corp.	3.71%	12,197,638	$1.3B	Reduce -8.2%
TSM Taiwan Semiconductor-SP ADR	3.43%	7,361,683	$1.2B	Reduce -4.7%
AMZN Amazon.com Inc.	3.27%	6,118,131	$1.2B	Reduce -10.5%
AAPL Apple Inc.	3.27%	5,239,398	$1.2B	Add +2.6%
META Meta Platforms Inc. Class A	2.54%	1,572,230	$906.2M	Reduce -5.5%
MA Mastercard Inc. Class A	1.87%	1,215,314	$666.1M	Reduce -15.4%
CG The Carlyle Group Inc.	1.49%	12,171,478	$530.6M	Reduce -8.1%
AVGO Broadcom Inc.	1.45%	3,078,817	$515.5M	Add +375.4%
MELI MercadoLibre Inc.	1.40%	255,567	$498.6M	Reduce -1.1%
SE Sea Ltd.-ADR	1.35%	3,678,011	$479.9M	Add +64.7%
PRMB Primo Brands Corp.	1.14%	11,402,012	$404.7M	Add +2.1%
CPRT Copart Inc.	1.08%	6,803,733	$385.0M	Add +2.0%
ORLY O'reilly Automotive Inc.	1.04%	258,834	$370.8M	Add +10.0%
INTU Intuit Inc.	0.99%	575,615	$353.4M	Reduce -1.4%
CMG Chipotle Mexican Grill Inc.	0.96%	6,802,345	$341.5M	Add +9.3%
COST Costco Wholesale Corp.	0.94%	353,579	$334.4M	Add +4.9%
UNH Unitedhealth Group Inc.	0.92%	625,021	$327.4M	Reduce -5.7%
LIN Linde PLC	0.90%	690,814	$321.7M	Reduce -29.9%
LRN Stride Inc.	0.82%	2,319,593	$293.4M	Reduce -6.0%
NOW ServiceNow Inc.	0.82%	366,852	$292.1M	Reduce -9.2%
CRM Salesforce Inc.	0.82%	1,083,678	$290.8M	Reduce -8.0%
YUMC Yum China Holdings Inc.	0.79%	5,423,002	$282.3M	Add +7.1%
BFAM Bright Horizons Family Solut	0.79%	2,211,097	$280.9M	Reduce -6.7%
TRU Transunion	0.78%	3,344,290	$277.5M	Reduce -0.8%
CHE Chemed Corp.	0.76%	441,550	$271.7M	Reduce -6.8%
IDXX Idexx Laboratories Inc.	0.75%	637,111	$267.6M	Add +50.9%
DOCS Doximity Inc. Class A	0.75%	4,584,467	$266.0M	Reduce -26.4%
RACE Ferrari NV	0.72%	603,138	$258.1M	Add +1.4%
EG Everest Group Ltd.	0.72%	702,337	$255.2M	Add +9.3%
BWIN Baldwin Insurance Group Inc./ filed as THE BALDWIN INSURANCE GRP IN	0.70%	5,562,470	$248.6M	Add +13.3%
CWST Casella Waste Systems Inc. Class A	0.69%	2,216,265	$247.1M	Reduce -16.1%
LRCX Lam Research Corp.	0.68%	3,323,880	$241.6M	Reduce -2.5%
DT Dynatrace Inc.	0.67%	5,062,075	$238.7M	Add +4.1%
CWAN Clearwater Analytics HDS-A	0.67%	8,839,660	$236.9M	Reduce -6.1%
SPOT Spotify Technology SA	0.66%	430,398	$236.7M	Add +64.7%
MRCY Mercury Systems Inc.	0.65%	5,372,198	$231.5M	Reduce -16.5%
LYV Live Nation Entertainment Inc.	0.65%	1,770,553	$231.2M	Reduce -2.2%
TLN Talen Energy Corp.	0.62%	1,112,993	$222.2M	Reduce -6.6%
CFLT Confluent Inc. Class A	0.61%	9,282,825	$217.6M	Reduce -14.1%
A Agilent Technologies Inc.	0.61%	1,850,388	$216.5M	Add +11.4%
UBER Uber Technologies Inc.	0.60%	2,914,700	$212.4M	Reduce -21.7%
MANH Manhattan Associates Inc.	0.58%	1,200,011	$207.6M	Add +76.0%
PANW Palo Alto Networks Inc.	0.57%	1,189,698	$203.0M	Reduce -5.8%
SN Sharkninja Inc.	0.54%	2,297,628	$191.6M	Reduce -18.7%
BCO The Brink's Co.	0.54%	2,219,578	$191.2M	Reduce -4.5%
RY Royal Bank of Canada	0.53%	1,674,195	$188.6M	Add +186.3%
EXLS Exlservice Holdings Inc.	0.52%	3,929,979	$185.5M	Reduce -23.7%
BAM Brookfield Asset Mgmt-A	0.51%	3,755,118	$181.9M	Reduce -0.3%
FLUT Flutter Entertainment PLC-Di	0.50%	810,760	$179.6M	Add +51.9%
TYL Tyler Technologies Inc.	0.50%	308,559	$179.4M	Add +2748.8%
MLI Mueller Industries Inc.	0.50%	2,355,971	$179.4M	Reduce -7.2%
EHC Encompass Health Corp.	0.50%	1,763,468	$178.6M	Reduce -5.3%
PLNT Planet Fitness Inc. Class A	0.50%	1,843,687	$178.1M	Reduce -8.9%
DDOG Datadog Inc. Class A	0.50%	1,785,749	$177.2M	Add +47.4%
INSM Insmed Inc.	0.50%	2,313,217	$176.5M	Reduce -4.9%
WAL Western Alliance Bancorp	0.49%	2,292,632	$176.1M	Reduce -10.6%
CGNX Cognex Corp.	0.47%	5,597,851	$167.0M	Reduce -4.2%
GMED Globus Medical Inc. Class A	0.47%	2,273,787	$166.4M	Add +84.5%
PODD Insulet Corp.	0.46%	628,537	$165.1M	Reduce -7.1%
POOL Pool Corp.	0.46%	514,937	$163.9M	Reduce -7.0%
FTAI Ftai Aviation Ltd.	0.44%	1,424,978	$158.2M	Add +17.7%
WAY Waystar Holding Corp.	0.44%	4,227,425	$157.9M	New
QTWO Q2 Holdings Inc. filed as Q2 HLDGS INC	0.44%	1,967,187	$157.4M	Reduce -2.3%
ACVA Acv Auctions Inc. Class A	0.44%	11,076,909	$156.1M	Reduce -8.4%
CW Curtiss-Wright Corp.	0.43%	485,212	$153.9M	Add +29.8%
GTLS Chart Industries Inc.	0.42%	1,042,446	$150.5M	Reduce -4.6%
TWST Twist Bioscience Corp.	0.42%	3,806,867	$149.5M	Add +29.1%
WSC Willscot Holdings Corp.	0.41%	5,282,161	$146.8M	Reduce -4.9%
VEEV Veeva Systems Inc. Class A	0.41%	628,291	$145.5M	Reduce -21.1%
ELF Elf Beauty Inc.	0.40%	2,277,639	$143.0M	Reduce -1.2%
MLM Martin Marietta Materials	0.39%	292,752	$140.0M	Reduce -33.2%
CCJ Cameco Corp.	0.39%	3,362,624	$138.4M	Reduce -17.2%
ACHC Acadia Healthcare Co. Inc.	0.37%	4,398,555	$133.4M	Add +21.2%
APO Apollo Global Management Inc.	0.36%	945,205	$129.4M	Reduce -32.5%
MNST Monster Beverage Corp.	0.36%	2,199,595	$128.7M	Reduce -39.8%
PCTY Paylocity Holding Corp.	0.36%	687,005	$128.7M	New
BPMC Blueprint Medicines Corp.	0.36%	1,429,668	$126.5M	Reduce -26.5%
MZTI The Marzetti Company filed as LANCASTER COLONY CORP	0.35%	720,305	$126.1M	Reduce -14.1%
NVT Nvent Electric PLC	0.35%	2,404,472	$126.0M	Reduce -7.2%
ONB Old National Bancorp	0.35%	5,892,673	$124.9M	Add +7.3%
AZEK The Azek Co. Inc.	0.35%	2,518,105	$123.1M	Reduce -26.1%
CIEN Ciena Corp.	0.34%	2,005,631	$121.2M	New
FOLD Amicus Therapeutics Inc.	0.34%	14,778,651	$120.6M	Reduce -5.3%
NFE New Fortress Energy Inc.	0.34%	14,508,626	$120.6M	Reduce -6.8%
NOVT Novanta Inc.	0.33%	928,888	$118.8M	Reduce -4.8%
EPAM Epam Systems Inc.	0.33%	696,511	$117.6M	Reduce -2.4%
NEOG Neogen Corp.	0.33%	13,558,932	$117.6M	Reduce -5.5%
IBN Icici Bank Ltd.-Spon ADR	0.33%	3,717,585	$117.2M	Add +3.6%
MDGL Madrigal Pharmaceuticals Inc.	0.33%	353,155	$117.0M	Reduce -5.0%
INSP Inspire Medical Systems Inc.	0.31%	692,918	$110.4M	Reduce -23.2%
WMS Advanced Drainage Systems Inc.	0.31%	1,013,255	$110.1M	Reduce -2.6%
NICE Nice Ltd. - Spon ADR	0.31%	710,666	$109.6M	Reduce -25.9%
GWRE Guidewire Software Inc.	0.30%	577,914	$108.3M	Reduce -7.9%
TEAM Atlassian Corp. Class A	0.30%	505,536	$107.3M	New
ITUB Itau Unibanco H-Spon PRF ADR	0.30%	19,276,152	$106.0M	Add +36.7%
CHDN Churchill Downs Inc.	0.30%	949,715	$105.5M	Reduce -8.1%
FRPT Freshpet Inc.	0.30%	1,266,200	$105.3M	Add +42.8%
WGS Genedx Holdings Corp.	0.30%	1,188,988	$105.3M	Add +77.5%
P Everpure Inc. Class A filed as PURE STORAGE INC	0.29%	2,314,536	$102.5M	Reduce -8.3%

Show all 423 holdings

Portfolio Sells Q4 2024 → Q1 2025


NVDA Nvidia Corp.	Reduce -8.2%	3.71%	−0.64
AMD Advanced Micro Devices	Reduce -97.4%	0.02%	−0.61
ACN Accenture PLC Class A	Reduce -66.8%	0.27%	−0.53
PEN Penumbra Inc.	Sold out	0.00%	−0.51
CF CF Industries Holdings Inc.	Sold out	0.00%	−0.49
FLYW Flywire Corp.-Voting	Reduce -85.5%	0.04%	−0.48
TXN Texas Instruments Inc.	Sold out	0.00%	−0.45
AMZN Amazon.com Inc.	Reduce -10.5%	3.27%	−0.39
SHOP Shopify Inc. Class A	Reduce -62.7%	0.22%	−0.34
CRDO Credo Technology Group Holdi	Sold out	0.00%	−0.31
ELF Elf Beauty Inc.	Reduce -1.2%	0.40%	−0.31
BWXT BWX Technologies Inc.	Reduce -82.0%	0.07%	−0.30
TSM Taiwan Semiconductor-SP ADR	Reduce -4.7%	3.43%	−0.29
WST West Pharmaceutical Services	Reduce -44.9%	0.22%	−0.29
NFE New Fortress Energy Inc.	Reduce -6.8%	0.34%	−0.24
TEVA Teva Pharmaceutical-SP ADR	Sold out	0.00%	−0.23
NOW ServiceNow Inc.	Reduce -9.2%	0.82%	−0.23
RVLV Revolve Group Inc. Class A	Reduce -71.7%	0.06%	−0.23
MSFT Microsoft Corp.	Reduce -6.9%	4.35%	−0.21
APO Apollo Global Management Inc.	Reduce -32.5%	0.36%	−0.20
ACVA Acv Auctions Inc. Class A	Reduce -8.4%	0.44%	−0.20
EXAS Exact Sciences Corp.	Reduce -34.7%	0.27%	−0.20
HDB HDFC Bank Ltd.-ADR	Reduce -53.4%	0.22%	−0.17
MLM Martin Marietta Materials	Reduce -33.2%	0.39%	−0.16
AGYS Agilysys Inc.	Sold out	0.00%	−0.15
VRNS Varonis Systems Inc.	Reduce -60.8%	0.10%	−0.15
AMBA Ambarella Inc.	Reduce -99.2%	0.00%	−0.15
CRM Salesforce Inc.	Reduce -8.0%	0.82%	−0.15
CG The Carlyle Group Inc.	Reduce -8.1%	1.49%	−0.14
RRC Range Resources Corp.	Sold out	0.00%	−0.14
SN Sharkninja Inc.	Reduce -18.7%	0.54%	−0.13
CFLT Confluent Inc. Class A	Reduce -14.1%	0.61%	−0.13
CCJ Cameco Corp.	Reduce -17.2%	0.39%	−0.12
WK Workiva Inc.	Sold out	0.00%	−0.12
GOOGL Alphabet Inc. Class A	Reduce -25.2%	0.27%	−0.11
MNST Monster Beverage Corp.	Reduce -39.8%	0.36%	−0.11
LIN Linde PLC	Reduce -29.9%	0.90%	−0.10
INSP Inspire Medical Systems Inc.	Reduce -23.2%	0.31%	−0.10
NEOG Neogen Corp.	Reduce -5.5%	0.33%	−0.10
P Everpure Inc. Class A	Reduce -8.3%	0.29%	−0.09
YOU Clear Secure Inc. Class A	Reduce -99.1%	0.00%	−0.09
GKOS Glaukos Corp.	Reduce -7.9%	0.21%	−0.09
FSV Firstservice Corp.	Reduce -31.4%	0.24%	−0.09
NICE Nice Ltd. - Spon ADR	Reduce -25.9%	0.31%	−0.09
GTLS Chart Industries Inc.	Reduce -4.6%	0.42%	−0.09
TT Trane Technologies PLC	Sold out	0.00%	−0.09
EPAM Epam Systems Inc.	Reduce -2.4%	0.33%	−0.08
NVT Nvent Electric PLC	Reduce -7.2%	0.35%	−0.08
RRX Regal Rexnord Corp.	Reduce -7.9%	0.25%	−0.07
CRI Carter's Inc.	Sold out	0.00%	−0.07

Portfolio Buys Q4 2024 → Q1 2025


AVGO Broadcom Inc.	Add +375.4%	1.45%	+1.08
SE Sea Ltd.-ADR	Add +64.7%	1.35%	+0.77
TYL Tyler Technologies Inc.	Add +2748.8%	0.50%	+0.49
WAY Waystar Holding Corp.	New	0.44%	+0.44
SPOT Spotify Technology SA	Add +64.7%	0.66%	+0.38
PCTY Paylocity Holding Corp.	New	0.36%	+0.36
ORLY O'reilly Automotive Inc.	Add +10.0%	1.04%	+0.36
RY Royal Bank of Canada	Add +186.3%	0.53%	+0.36
CIEN Ciena Corp.	New	0.34%	+0.34
IDXX Idexx Laboratories Inc.	Add +50.9%	0.75%	+0.32
TEAM Atlassian Corp. Class A	New	0.30%	+0.30
PRMB Primo Brands Corp.	Add +2.1%	1.14%	+0.30
APPF Appfolio Inc. Class A	New	0.26%	+0.26
BWIN Baldwin Insurance Group Inc./	Add +13.3%	0.70%	+0.23
GMED Globus Medical Inc. Class A	Add +84.5%	0.47%	+0.22
YUMC Yum China Holdings Inc.	Add +7.1%	0.79%	+0.20
JLL Jones Lang Lasalle Inc.	Add +218.3%	0.26%	+0.18
COST Costco Wholesale Corp.	Add +4.9%	0.94%	+0.18
WGS Genedx Holdings Corp.	Add +77.5%	0.30%	+0.17
FLUT Flutter Entertainment PLC-Di	Add +51.9%	0.50%	+0.17
GRAB Grab Holdings Ltd. Class A	New	0.16%	+0.16
EG Everest Group Ltd.	Add +9.3%	0.72%	+0.15
CPRT Copart Inc.	Add +2.0%	1.08%	+0.15
AAPL Apple Inc.	Add +2.6%	3.27%	+0.14
MANH Manhattan Associates Inc.	Add +76.0%	0.58%	+0.13
ITUB Itau Unibanco H-Spon PRF ADR	Add +36.7%	0.30%	+0.13
COLD Americold Realty Trust Inc.	Add +83.9%	0.21%	+0.11
CW Curtiss-Wright Corp.	Add +29.8%	0.43%	+0.11
RACE Ferrari NV	Add +1.4%	0.72%	+0.11
TBBB BBB Foods Inc. Class A	Add +54.5%	0.25%	+0.10
CB Chubb Ltd.	Add +39.6%	0.22%	+0.09
SRAD Sportradar Group AG-A	New	0.09%	+0.09
VSH Vishay Intertechnology Inc.	New	0.09%	+0.09
ATMU Atmus Filtration Technologie	New	0.09%	+0.09
TWST Twist Bioscience Corp.	Add +29.1%	0.42%	+0.08
RUSHA Rush Enterprises Inc. Class A	Add +70.6%	0.16%	+0.08
CACI Caci International Inc. Class A	Add +228.6%	0.11%	+0.08
SIGI Selective Insurance Group	New	0.07%	+0.07
DDOG Datadog Inc. Class A	Add +47.4%	0.50%	+0.07
CADE Cadence Bank	New	0.07%	+0.07
VERX Vertex Inc. Class A	New	0.07%	+0.07
ATAT Atour Lifestyle Holdings-ADR	Add +80.4%	0.13%	+0.07
IBN Icici Bank Ltd.-Spon ADR	Add +3.6%	0.33%	+0.07
A Agilent Technologies Inc.	Add +11.4%	0.61%	+0.06
ONB Old National Bancorp	Add +7.3%	0.35%	+0.06
CECO Ceco Environmental Corp.	New	0.06%	+0.06
TNET Trinet Group Inc.	Add +141.5%	0.09%	+0.06
ACGL Arch Capital Group Ltd.	Add +16.0%	0.20%	+0.05
IDA Idacorp Inc.	Add +25.3%	0.16%	+0.05
YPF YPF S.A.-Sponsored ADR	Add +56.5%	0.17%	+0.05

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