Latest WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Stock Portfolio

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Performance:

2025 Q3: 4.72%YTD: 4.29%2024: 11.78%

Performance for 2025 Q3 is 4.72%, and YTD is 4.29%, and 2024 is 11.78%.

About WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC and 13F Hedge Fund Stock Holdings

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC is a hedge fund based in CHICAGO, IL. On 14-Jul-2023, the fund reported that it had an AUM (Regulated Assets under Management) of $56 Billions. In it's latest 13F Holdings report, WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC reported an equity portfolio of $38.7 Billions as of 30 Sep, 2025.

The top stock holdings of WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC are NVDA, MSFT, TSM. The fund has invested 5.6% of it's portfolio in NVIDIA CORPORATION and 5.1% of portfolio in MICROSOFT CORP.

The fund managers got completely rid off EPAM SYS INC (EPAM), NICE LTD and CHUBB LIMITED (CB) stocks. They significantly reduced their stock positions in DATADOG INC (DDOG), PAYLOCITY HLDG CORP (PCTY) and ZIPRECRUITER INC (ZIP). WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC opened new stock positions in BENTLEY SYS INC (BSY), SNOWFLAKE INC (SNOW) and CAVA GROUP INC. The fund showed a lot of confidence in some stocks as they added substantially to KNIGHT-SWIFT TRANSN HLDGS IN (KNX), ALPHABET INC (GOOG) and HUMANA INC (HUM).

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Annual Return Estimates Vs S&P 500

Our best estimate is that WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC made a return of 4.72% in the last quarter. In trailing 12 months, it's portfolio return was 4.61%.

New Buys

Ticker	$ Bought
bentley sys inc	150,903,000
snowflake inc	116,882,000
cava group inc	114,098,000
nextracker inc	108,739,000
teradyne inc	106,735,000
lattice semiconductor corp	102,185,000
tencent music entmt group	88,175,400
ishares tr	79,218,400

New stocks bought by WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Additions

Ticker	% Inc.
knight-swift transn hldgs in	8,184
alphabet inc	592
humana inc	256
coherent corp	225
cadence bank	196
nu hldgs ltd	182
fabrinet	154
coupang inc	114

Additions to existing portfolio by WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Reductions

Ticker	% Reduced
datadog inc	-99.81
paylocity hldg corp	-99.48
ziprecruiter inc	-99.31
apollo global mgmt inc	-99.29
vertex pharmaceuticals inc	-97.36
cbiz inc	-94.97
west pharmaceutical svsc inc	-88.86
e l f beauty inc	-85.79

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC reduced stake in above stock

Sold off

Ticker	$ Sold
adt inc del	-21,739,700
infosys ltd	-36,207,300
grid dynamics hldgs inc	-16,826,300
marten trans ltd	-17,150,900
pacific premier bancorp	-24,327,900
grupo financiero galicia s.a	-51,837,600
mirion technologies inc	-21,655,900
ypf sociedad anonima	-28,560,500

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC got rid off the above stocks

Sector Distribution

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC has about 32.4% of it's holdings in Technology sector.

Sector	%
Technology	32.4
Others	18.2
Industrials	10
Healthcare	9.7
Consumer Cyclical	9.3
Financial Services	7.6
Communication Services	4.7
Consumer Defensive	3.2
Basic Materials	2.4
Real Estate	1.3

Market Cap. Distribution

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC has about 50.7% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
MEGA-CAP	29
MID-CAP	25.8
LARGE-CAP	21.7
UNALLOCATED	18.2
SMALL-CAP	5.3

Stocks belong to which Index?

About 58.4% of the stocks held by WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC either belong to S&P 500 or RUSSELL 2000 index.

Index	%
Others	41.5
S&P 500	38.4
RUSSELL 2000	20

Top 5 Winners (%)		%
CECE	ceco environmental corp	80.8 %
CIEN	ciena corp	79.1 %
LITE	lumentum hldgs inc	71.2 %
EMBC	embecta corp	45.6 %
PSTG	pure storage inc	45.5 %

Top 5 Winners ($)		$
NVDA	nvidia corporation	350.9 M
AAPL	apple inc	259.9 M
CIEN	ciena corp	174.3 M
AVGO	broadcom inc	160.6 M
PSTG	pure storage inc	129.2 M

Top 5 Losers (%)		%
GOGO	gogo inc	-39.9 %
ACVA	acv auctions inc	-38.1 %
PRCT	procept biorobotics corp	-34.5 %
BRP	the baldwin insurance grp in	-34.1 %
BRBR	bellring brands inc	-33.7 %

Top 5 Losers ($)		$
CMG	chipotle mexican grill inc	-106.4 M
BRP	the baldwin insurance grp in	-78.9 M
ACVA	acv auctions inc	-70.1 M
MELI	mercadolibre inc	-66.0 M
INTU	intuit	-54.2 M

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC has 413 stocks in it's portfolio. About 31% of the portfolio is in top 10 stocks. CMG proved to be the most loss making stock for the portfolio. NVDA was the most profitable stock for WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC last quarter.

Last Reported on: 12 Nov, 2025

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
A	agilent technologies inc	0.71	2,144,090	275,194,000	reduced	-3.18

AAPL	apple inc	3.70	5,620,450	1,431,140,000	added	6.98

ABC	cencora inc	0.03	34,905	10,908,900	reduced	-7.33

ABCB	ameris bancorp	0.12	657,531	48,203,600	reduced	-5.71

ABM	abm inds inc	0.08	682,365	31,470,700	reduced	-5.71

ABT	abbott labs	0.02	46,827	6,271,970	reduced	-0.97

ACGL	arch cap group ltd	0.16	689,145	62,526,100	reduced	-8.4

ACHC	acadia healthcare company in	0.00	9,916	245,520	reduced	-57.46

ACN	accenture plc ireland	0.00	1,389	342,527	reduced	-8.32

ACSG	dbx etf tr	0.01	101,579	3,350,080	unchanged	0.00

ACVA	acv auctions inc	0.29	11,471,700	113,685,000	added	3.26

ADC	agree rlty corp	0.07	377,981	26,851,800	added	0.39

ADT	adt inc del	0.00	0.00	0.00	sold off	-100

ADTN	adtran holdings inc	0.07	2,736,430	25,667,700	reduced	-5.72

AEHR	aehr test sys	0.07	894,061	26,920,200	new

AFG	american finl group inc ohio	0.00	2,195	319,855	reduced	-5.02

AGCO	agco corp	0.00	0.00	0.00	sold off	-100

AGX	argan inc	0.05	71,551	19,322,300	new

AGYS	agilysys inc	0.15	566,222	59,594,900	added	10.03

AGZD	wisdomtree tr	0.00	21,000	928,200	unchanged	0.00