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William Blair & Company

William Blair & Company Portfolio holdings

AUM $38.4B
1-Year Est. Return 25.71%
This Fund
S&P 500
This Quarter Est. Return
+19.08%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+606.62%
AUM
$38.4B
AUM Growth
+$3.49B
Cap. Flow
-$792M
Cap. Flow %
-2.06%
Top 10 Hldgs %
26.32%
Holding
2,083
New
163
Increased
891
Reduced
708
Closed
85

Top Buys

Rank Stock Value
1
HONA
Honeywell Aerospace
HONA
+$100M
2
ANET icon
Arista Networks
ANET
+$71.2M
3
RSP icon
Invesco S&P 500 Equal Weight ETF
RSP
+$61.8M
4
VTI icon
Vanguard Morningstar Total Stock Market ETF
VTI
+$55.8M
5
MIAX
Miami International Holdings
MIAX
+$49.4M

Top Sells

Rank Stock Value
1
XOM icon
ExxonMobil
XOM
+$161M
2
CPRT icon
Copart
CPRT
+$62M
3
DHR icon
Danaher
DHR
+$59.1M
4
AAPL icon
Apple
AAPL
+$57M
5
VEEV icon
Veeva Systems
VEEV
+$52.2M

Sector Composition

Rank Sector Weight
1 Technology 24.38%
2 Miscellaneous 18.67%
3 Industrials 15.24%
4 Financials 11.07%
5 Healthcare 9.11%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
RDVY icon
76
First Trust Rising Dividend Achievers ETF
RDVY
$25B
$116M 0.3%
1,431,021
+550,198
+62% +$41.4M
LYV icon
77
Live Nation Entertainment
LYV
$39.7B
$115M 0.3%
628,014
-34,067
-5% -$5.6M
TSLA icon
78
Tesla
TSLA
$1.41T
$115M 0.3%
273,193
-22,848
-8% -$9.09M
KO icon
79
Coca-Cola
KO
$381B
$114M 0.3%
1,397,145
-18,590
-1% -$1.47M
DXCM icon
80
DexCom
DXCM
$32.9B
$112M 0.29%
1,665,665
-261,722
-14% -$17.4M
WM icon
81
Waste Management
WM
$87.6B
$110M 0.29%
491,328
+7,025
+1% +$1.56M
AME icon
82
Ametek
AME
$53.8B
$106M 0.27%
436,176
-21,271
-5% -$4.9M
JLL icon
83
Jones Lang LaSalle
JLL
$15.7B
$105M 0.27%
340,350
+2,933
+0.9% +$911K
EFA icon
84
iShares MSCI EAFE ETF
EFA
$77.9B
$103M 0.27%
994,809
+36,004
+4% +$3.7M
HON icon
85
Honeywell
HON
$63.6B
$102M 0.27%
454,384
+158,553
+54% +$35.4M
CSCO icon
86
Cisco
CSCO
$433B
$101M 0.26%
857,629
+33,828
+4% +$3.54M
HONA
87
Honeywell Aerospace
HONA
$51.5B
$100M 0.26%
+454,071
New +$100M
GD icon
88
General Dynamics
GD
$96.9B
$98.8M 0.26%
278,892
-13,143
-5% -$4.5M
ORLY icon
89
O'Reilly Automotive
ORLY
$69.3B
$97.1M 0.25%
1,054,007
-50,393
-5% -$4.6M
ITW icon
90
Illinois Tool Works
ITW
$76.5B
$97.1M 0.25%
358,826
-1,494
-0.4% -$388K
DE icon
91
Deere & Co
DE
$185B
$96.9M 0.25%
152,753
+5,130
+3% +$2.97M
SBUX icon
92
Starbucks
SBUX
$110B
$96.7M 0.25%
945,888
+7,340
+0.8% +$739K
ABT icon
93
Abbott
ABT
$177B
$96.5M 0.25%
1,063,211
-264,550
-20% -$24.1M
GNRC icon
94
Generac Holdings
GNRC
$10.4B
$95.3M 0.25%
325,426
-21,404
-6% -$5.36M
IUSG icon
95
iShares Core S&P US Growth ETF
IUSG
$32.7B
$94.3M 0.25%
501,346
+23,068
+5% +$4.17M
MCD icon
96
McDonald's
MCD
$180B
$91.9M 0.24%
340,138
-8,105
-2% -$2.32M
NFLX icon
97
Netflix
NFLX
$326B
$91.8M 0.24%
1,285,481
-477,970
-27% -$42.1M
TSM icon
98
TSMC
TSM
$2.15T
$91.5M 0.24%
191,662
+53,907
+39% +$21.9M
ITOT icon
99
iShares Core S&P Total US Stock Market ETF
ITOT
$95.1B
$91.4M 0.24%
556,582
-20,914
-4% -$3.32M
GWRE icon
100
Guidewire Software
GWRE
$12.5B
$89.4M 0.23%
726,387
-248,909
-26% -$33.2M
2 3
4
5 6

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William Blair & Company's Q2 2026 Portfolio in Review

As of Q2 2026, William Blair & Company held 2,083 positions worth $38.4B, up 10% from $34.9B the previous quarter. Its ten largest holdings account for 26% of the portfolio.

William Blair & Company's Q2 2026 filing shows 163 new, 891 increased, 708 reduced and 85 closed positions. Its largest new stake was Honeywell Aerospace: 454,071 shares worth $100M. The largest sale was ExxonMobil, an estimated $161M.

By sector, the portfolio is most concentrated in Technology at 24% of assets, up from 22% a quarter earlier, followed by Miscellaneous and Industrials.

  • William Blair & Company's largest Q2 2026 buy was Honeywell Aerospace: 454,071 shares worth $100M.
  • William Blair & Company added most to Arista Networks in Q2 2026, an estimated $71.2M increase.
  • William Blair & Company's biggest Q2 2026 reduction was Copart, cutting an estimated $62M.
  • William Blair & Company fully exited ExxonMobil in Q2 2026, selling an estimated $161M.
  • William Blair & Company's ten largest holdings make up 26% of its $38.4B portfolio in Q2 2026.
  • William Blair & Company opened 163 new positions and closed 85 in Q2 2026.
  • William Blair & Company's portfolio value rose 10% quarter-over-quarter to $38.4B.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.