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Latest WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Stock Portfolio

$33.25Billion | No. of Holdings #402

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Performance

2026 Q2+15.35%
YTD+10.40%
2025+8.96%

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 2026-08-12, the fund reported it's updated stock portfolio. In the 13F Holdings report, WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC reported an equity portfolio of $33.3 Billions as of 30 Jun, 2026. <br><br> The top stock holdings of WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC are TSM, NVDA, GOOG. The fund has invested 7.1% of it's portfolio in TAIWAN SEMICONDUCTOR MANUFAC and 5.2% of portfolio in NVIDIA CORPORATION. <br><br> The fund managers got completely rid off COHERENT CORP (COHR), VEEVA SYS INC (VEEV) and DOXIMITY INC (DOCS) stocks. They significantly reduced their stock positions in BIO-TECHNE CORP (TECH), MERCADOLIBRE INC (MELI) and ISHARES TR (IJR). WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC opened new stock positions in GE AEROSPACE (GE), CROWDSTRIKE HLDGS INC (CRWD) and SEAGATE TECHNOLOGY HLDNGS PL (STX). The fund showed a lot of confidence in some stocks as they added substantially to TIMKEN CO (TKR), APPLIED MATLS INC (AMAT) and WEST PHARMACEUTICAL SVSC INC (WST).
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Equity Portfolio Value
Last Reported on: 12 Aug, 2026
$33.25Billion
  as of Aug 12, 2026

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 15.35% in the last quarter. In trailing 12 months, it's portfolio return was 17.52%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
ge aerospace295,546,000
crowdstrike hldgs inc214,754,000
seagate technology hldngs pl184,167,000
canadian nat res ltd med ter143,695,000
forgent power solutions inc140,559,000
ptc therapeutics inc140,520,000
etsy inc120,417,000
repligen corp107,593,000
New stocks bought by WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Additions

Ticker% Inc.
timken co18,347
applied matls inc1,325
west pharmaceutical svsc inc950
jazz pharmaceuticals plc516
pricesmart inc413
teva pharmaceutical inds ltd362
mirum pharmaceuticals inc318
diodes inc281
Additions to existing portfolio by WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Reductions

Ticker% Reduced
bio-techne corp-99.84
mercadolibre inc-99.41
ishares tr-98.1
tower semiconductor ltd-98.08
donaldson inc-97.84
cencora inc-90.25
casella waste sys inc-78.65
icici bank limited-76.57
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC reduced stake in above stock

Sold off

Ticker$ Sold
acv auctions inc-30,581,500
doximity inc-112,637,000
bellring brands inc-48,786,500
janus international group in-14,058,200
quanterix corp-7,334,620
simply good foods co-27,417,700
taseko mines ltd-9,759,570
willscot hldgs corp-25,939,300
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC got rid off the above stocks

Sector Distribution

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC has about 29.7% of it's holdings in Technology sector.

  • Technology
  • Others
  • Industrials
  • Healthcare
  • Financial Services
  • Consumer Cyclical
  • Communication Services
  • Basic Materials
  • Consumer Defensive
Sector%
Technology29.7
Others20.1
Industrials12.1
Healthcare11.9
Financial Services6.6
Consumer Cyclical6.5
Communication Services5.2
Basic Materials2.9
Consumer Defensive2.8

Market Cap. Distribution

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC has about 55.7% of it's portfolio invested in the large-cap and mega-cap stocks.

  • LARGE-CAP
  • MEGA-CAP
  • MID-CAP
  • UNALLOCATED
  • SMALL-CAP
Category%
LARGE-CAP27.9
MEGA-CAP27.8
MID-CAP21
UNALLOCATED20.1
SMALL-CAP3.1

Stocks belong to which Index?

About 60.1% of the stocks held by WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC either belong to S&P 500 or RUSSELL 2000 index.

  • Others
  • S&P 500
  • RUSSELL 2000
Index%
Others39.8
S&P 50036.5
RUSSELL 200023.6
Top 5 Winners (%)%
penguin solutions inc
243.2 %
VSH
vishay intertechnology inc
180.4 %
AMD
advanced micro devices inc
160.7 %
MRVL
marvell technology inc
159.8 %
FLEX
flex ltd
129.5 %
Top 5 Winners ($)$
TSM
taiwan semiconductor manufac
729.2 M
AMD
advanced micro devices inc
340.9 M
NVDA
nvidia corporation
225.3 M
TWST
twist bioscience corp
206.1 M
GOOG
alphabet inc
198.8 M
Top 5 Losers (%)%
IJR
ishares tr
-36.1 %
BSX
boston scientific corp
-30.4 %
INSM
insmed inc
-29.5 %
HURN
huron consulting group inc
-26.2 %
EYE
national vision hldgs inc
-25.5 %
Top 5 Losers ($)$
INTU
intuit
-57.1 M
INSM
insmed inc
-43.6 M
CG
carlyle group inc
-38.4 M
EYE
national vision hldgs inc
-30.9 M
LOPE
grand canyon ed inc
-27.2 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 402 stocks in it's portfolio. About 28.9% of the portfolio is in top 10 stocks. INTU proved to be the most loss making stock for the portfolio. TSM was the most profitable stock for WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC last quarter.

$33.25BTotal Value
460Positions
12 Aug, 2026Last Reported
Current holdings of Current Stock Holdings of WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC, last reported on 12 Aug, 2026. Select a row with a linked ticker to view its historical trend.
ExpandHoldingsorted ascending% PortfolioShares Held$ Value% Change
ACSG
Dbx Etf Tr

Dbx Etf Tr

ACSG
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's holding in Dbx Etf Tr over time
0.01%90,277
$3.31M
0.01%
increased 5.24 percentadded
AEM
Agnico Eagle Mines Ltd

Agnico Eagle Mines Ltd

AEM
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's holding in Agnico Eagle Mines Ltd over time
0%0.00
$0.00
0%
decreased 100 percentsold off
AGZD
Wisdomtree Tr

Wisdomtree Tr

AGZD
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's holding in Wisdomtree Tr over time
0%25,450
$1.09M
0%
increased 21.19 percentadded