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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
DLN icon
326
WisdomTree US LargeCap Dividend Fund
DLN
$6.26B
$13.1M 0.03%
135,878
+4,611
+4% +$436K
MMM icon
327
3M
MMM
$84.9B
$13M 0.03%
80,162
+1,412
+2% +$214K
ABNB icon
328
Airbnb
ABNB
$99.2B
$12.9M 0.03%
90,453
+1,613
+2% +$220K
SO icon
329
Southern Company
SO
$98.9B
$12.9M 0.03%
134,778
+3,530
+3% +$332K
PAYX icon
330
Paychex
PAYX
$42.1B
$12.8M 0.03%
130,074
-3,625
-3% -$343K
VNQ icon
331
Vanguard Real Estate ETF
VNQ
$37.2B
$12.7M 0.03%
131,992
+1,578
+1% +$151K
DUK icon
332
Duke Energy
DUK
$91.8B
$12.6M 0.03%
99,204
+6,675
+7% +$842K
FROG icon
333
JFrog
FROG
$11.7B
$12.3M 0.03%
135,741
-61,009
-31% -$3.96M
DVN icon
334
Devon Energy
DVN
$56.5B
$12.3M 0.03%
296,640
+45,538
+18% +$2.11M
OKE icon
335
Oneok
OKE
$59.7B
$12.2M 0.03%
140,323
+5,817
+4% +$512K
IWN icon
336
iShares Russell 2000 Value ETF
IWN
$14.2B
$12.1M 0.03%
54,715
-66
-0.1% -$13.8K
ESGV icon
337
Vanguard ESG US Stock ETF
ESGV
$13.3B
$12.1M 0.03%
91,218
+8,094
+10% +$1.03M
WPM icon
338
Wheaton Precious Metals
WPM
$68.1B
$12M 0.03%
107,160
-958
-0.9% -$125K
PRCT icon
339
Procept Biorobotics
PRCT
$1.11B
$12M 0.03%
531,724
+207,789
+64% +$5.2M
IJAN icon
340
Innovator International Developed Power Buffer ETF January
IJAN
$234M
$11.9M 0.03%
311,570
-27,651
-8% -$1.04M
CI icon
341
Cigna
CI
$76.3B
$11.8M 0.03%
42,965
+4,374
+11% +$1.24M
AVAV icon
342
AeroVironment
AVAV
$7.98B
$11.7M 0.03%
70,923
+961
+1% +$172K
CVS icon
343
CVS Health
CVS
$121B
$11.7M 0.03%
112,837
+51,103
+83% +$4.56M
VPU
344
Vanguard Utilities ETF
VPU
$7.99B
$11.6M 0.03%
59,265
+617
+1% +$121K
CVNA icon
345
Carvana
CVNA
$48.2B
$11.5M 0.03%
175,096
-1,104
-0.6% -$78.1K
VLO icon
346
Valero Energy
VLO
$114B
$11.4M 0.03%
43,940
+3,197
+8% +$787K
IJUL icon
347
Innovator International Developed Power Buffer ETF July
IJUL
$253M
$11.3M 0.03%
314,075
-26,949
-8% -$945K
TT icon
348
Trane Technologies
TT
$93B
$11.3M 0.03%
22,986
+1,110
+5% +$519K
FITB
349
Fifth Third Bancorp
FITB
$49.6B
$11.2M 0.03%
198,705
+15,503
+8% +$786K
XYZ
350
Block Inc
XYZ
$47B
$11.1M 0.03%
146,280
-68,437
-32% -$4.81M
12 13
14
15 16

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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.