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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
NEU icon
1576
NewMarket
NEU
$8.1B
$200K ﹤0.01%
+253
New +$182K
CNP icon
1577
CenterPoint Energy
CNP
$25.5B
$200K ﹤0.01%
4,545
-141
-3% -$6.04K
FTC icon
1578
First Trust Large Cap Growth AlphaDEX Fund
FTC
$1.29B
$200K ﹤0.01%
1,031
-244
-19% -$43.1K
PCT icon
1579
PureCycle Technologies
PCT
$1.18B
$198K ﹤0.01%
24,377
-2,777
-10% -$24.9K
PXF icon
1580
Invesco FTSE RAFI Developed Markets ex-US ETF
PXF
$3.01B
$197K ﹤0.01%
2,609
+179
+7% +$13.5K
EVH icon
1581
Evolent Health
EVH
$464M
$196K ﹤0.01%
36,249
+1,210
+3% +$4.64K
BMNR
1582
BitMine Immersion Technologies
BMNR
$15.5B
$196K ﹤0.01%
14,708
-1,775
-11% -$34.3K
IGIB icon
1583
iShares 5-10 Year Investment Grade Corporate Bond ETF
IGIB
$18.5B
$196K ﹤0.01%
3,678
+243
+7% +$12.9K
BBAI icon
1584
BigBear.ai
BBAI
$1.38B
$195K ﹤0.01%
53,211
-3,623
-6% -$14.5K
EEMV icon
1585
iShares MSCI Emerging Markets Min Vol Factor ETF
EEMV
$3.6B
$195K ﹤0.01%
2,591
+283
+12% +$20.4K
BMRN icon
1586
BioMarin Pharmaceuticals
BMRN
$12.9B
$193K ﹤0.01%
3,374
+1,895
+128% +$104K
EMGF icon
1587
iShares Emerging Markets Equity Factor ETF
EMGF
$1.92B
$193K ﹤0.01%
2,630
+764
+41% +$53.5K
VTRS icon
1588
Viatris
VTRS
$19.1B
$193K ﹤0.01%
12,125
-3,952
-25% -$61.3K
RGT
1589
Royce Global Value Trust
RGT
$94.6M
$192K ﹤0.01%
13,520
– –
IYT icon
1590
iShares US Transportation ETF
IYT
$2.12B
$187K ﹤0.01%
2,152
+55
+3% +$4.5K
PR
1591
Permian Resources
PR
$19.9B
$186K ﹤0.01%
+10,108
New +$203K
GLAS
1592
Glass House Brands
GLAS
$763M
$185K ﹤0.01%
+15,000
New +$195K
VERU icon
1593
Veru
VERU
$39.9M
$182K ﹤0.01%
58,000
+10,000
+21% +$25.5K
BXMT icon
1594
Blackstone Mortgage Trust
BXMT
$2.22B
$180K ﹤0.01%
10,606
+56
+0.5% +$1.05K
SUSC icon
1595
iShares ESG Aware USD Corporate Bond ETF
SUSC
$1.29B
$180K ﹤0.01%
7,755
+208
+3% +$4.81K
KSS icon
1596
Kohl's
KSS
$1.95B
$178K ﹤0.01%
10,060
-113
-1% -$1.68K
VOX icon
1597
Vanguard Communication Services ETF
VOX
$5.94B
$178K ﹤0.01%
969
+9
+0.9% +$1.73K
TFI icon
1598
State Street SPDR Nuveen ICE Municipal Bond ETF
TFI
$2.98B
$174K ﹤0.01%
3,804
– –
PCY icon
1599
Invesco Emerging Markets Sovereign Debt ETF
PCY
$1.28B
$174K ﹤0.01%
8,023
+3,846
+92% +$82.7K
IYE icon
1600
iShares US Energy ETF
IYE
$1.88B
$173K ﹤0.01%
3,057
-497
-14% -$30.1K
62 63
64
65 66

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TWC
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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.