We are live on ! Find out more
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
ALKT icon
1101
Alkami Technology
ALKT
$2.06B
$705K ﹤0.01%
38,921
-874
-2% -$14.4K
MBWM icon
1102
Mercantile Bank Corp
MBWM
$1.07B
$705K ﹤0.01%
12,276
+87
+0.7% +$4.59K
MAX icon
1103
MediaAlpha
MAX
$607M
$704K ﹤0.01%
56,046
+71
+0.1% +$670
HIMS icon
1104
Hims & Hers Health
HIMS
$6.5B
$702K ﹤0.01%
20,247
-1,292
-6% -$34.7K
EWBC icon
1105
East-West Bancorp
EWBC
$17.6B
$701K ﹤0.01%
5,432
+2,482
+84% +$305K
EIX icon
1106
Edison International
EIX
$21B
$700K ﹤0.01%
9,409
+4,758
+102% +$339K
OWL icon
1107
Blue Owl Capital
OWL
$7B
$700K ﹤0.01%
80,037
-7,325
-8% -$69.6K
AN icon
1108
AutoNation
AN
$6.73B
$698K ﹤0.01%
3,758
+449
+14% +$87.8K
CTRE icon
1109
CareTrust REIT
CTRE
$9.08B
$697K ﹤0.01%
17,277
+8,932
+107% +$351K
ACGL icon
1110
Arch Capital
ACGL
$33.1B
$695K ﹤0.01%
7,160
+3,288
+85% +$310K
MDYG icon
1111
State Street SPDR S&P 400 Mid Cap Growth ETF
MDYG
$2.76B
$694K ﹤0.01%
6,191
+190
+3% +$20.1K
GALT icon
1112
Galectin Therapeutics
GALT
$376M
$693K ﹤0.01%
149,283
– –
HOOD icon
1113
Robinhood
HOOD
$99.3B
$692K ﹤0.01%
6,904
-167,721
-96% -$14M
HSIC icon
1114
Henry Schein
HSIC
$9.75B
$691K ﹤0.01%
8,279
+581
+8% +$44.4K
SWK icon
1115
Stanley Black & Decker
SWK
$13.4B
$687K ﹤0.01%
7,299
+3,432
+89% +$269K
OXY icon
1116
Occidental Petroleum
OXY
$63.5B
$678K ﹤0.01%
13,966
+4,265
+44% +$242K
NNE
1117
Nano Nuclear Energy
NNE
$847M
$676K ﹤0.01%
31,975
+15
+0% +$369
PPL
1118
PPL Corp
PPL
$25B
$674K ﹤0.01%
18,542
-3,853
-17% -$142K
ICLN icon
1119
iShares Global Clean Energy ETF
ICLN
$2.08B
$671K ﹤0.01%
32,741
+486
+2% +$10.1K
SYF icon
1120
Synchrony
SYF
$24.7B
$669K ﹤0.01%
8,795
+4,179
+91% +$307K
NDEC
1121
Innovator Growth-100 Power Buffer ETF - December
NDEC
$62.4M
$667K ﹤0.01%
22,196
-1,300
-6% -$38K
VAW icon
1122
Vanguard Materials ETF
VAW
$2.93B
$665K ﹤0.01%
2,906
+138
+5% +$32K
IDEV icon
1123
iShares Core MSCI International Developed Markets ETF
IDEV
$32.2B
$660K ﹤0.01%
7,417
-14
-0.2% -$1.24K
ITGR icon
1124
Integer Holdings
ITGR
$4.29B
$660K ﹤0.01%
7,062
-1,255
-15% -$111K
NU icon
1125
Nu Holdings
NU
$68.5B
$660K ﹤0.01%
49,367
+11,353
+30% +$153K
43 44
45
46 47

Similar funds

Bank Julius Baer & Co
Bank Julius Baer & Co Zurich, Switzerland $38.6B AUM 35.31% 1-Year Est. Return
Public Sector Pension Investment Board (PSP Investments)
Public Sector Pension Investment Board (PSP Investments) Montreal, Quebec, Canada $38.7B AUM 44.46% 1-Year Est. Return
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $38.8B AUM 41.35% 1-Year Est. Return
TWC
TD Waterhouse Canada Toronto, Ontario, Canada $38B AUM 39.14% 1-Year Est. Return
Treasurer of the State of North Carolina
Treasurer of the State of North Carolina Raleigh, North Carolina $38.8B AUM 40.77% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
PIF
Public Investment Fund Al Aqiq District, Riyadh, Saudi Arabia $37.9B AUM 7.98% 1-Year Est. Return
Asset Management One
Asset Management One Tokyo, Japan $39B AUM 37.51% 1-Year Est. Return

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.