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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
PPH icon
876
VanEck Pharmaceutical ETF
PPH
$1B
$1.37M ﹤0.01%
12,498
+156
+1% +$16.1K
LQD icon
877
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$29.1B
$1.36M ﹤0.01%
12,467
+1,969
+19% +$215K
CHDN icon
878
Churchill Downs
CHDN
$5.62B
$1.35M ﹤0.01%
15,065
-334
-2% -$29.9K
LUV icon
879
Southwest Airlines
LUV
$19.2B
$1.35M ﹤0.01%
26,218
+13,157
+101% +$553K
NACP icon
880
Impact Shares NAACP Minority Empowerment ETF
NACP
$74.5M
$1.34M ﹤0.01%
22,078
-81
-0.4% -$4.56K
SCHV
881
Schwab US Large-Cap Value ETF
SCHV
$15.5B
$1.33M ﹤0.01%
38,342
-21
-0.1% -$692
BJUL icon
882
Innovator US Equity Buffer ETF July
BJUL
$354M
$1.33M ﹤0.01%
24,518
-1,530
-6% -$81.2K
EL icon
883
Estee Lauder
EL
$34.8B
$1.33M ﹤0.01%
16,825
-9,549
-36% -$771K
DRS icon
884
Leonardo DRS
DRS
$9.84B
$1.33M ﹤0.01%
31,123
+1,510
+5% +$67.1K
OCFC icon
885
OceanFirst Financial
OCFC
$1.8B
$1.32M ﹤0.01%
+67,737
New +$1.26M
SSNC icon
886
SS&C Technologies
SSNC
$19.1B
$1.32M ﹤0.01%
21,304
+2,771
+15% +$188K
DTD icon
887
WisdomTree US Total Dividend Fund
DTD
$1.64B
$1.32M ﹤0.01%
14,110
– –
BMO icon
888
Bank of Montreal
BMO
$121B
$1.31M ﹤0.01%
7,414
-2,283
-24% -$359K
FLR icon
889
Fluor
FLR
$7.23B
$1.31M ﹤0.01%
24,976
+6,524
+35% +$319K
EXPD icon
890
Expeditors International
EXPD
$25.2B
$1.3M ﹤0.01%
7,978
+93
+1% +$14.4K
PKG icon
891
Packaging Corp of America
PKG
$20.6B
$1.3M ﹤0.01%
5,436
+815
+18% +$179K
GDXJ icon
892
VanEck Junior Gold Miners ETF
GDXJ
$8.92B
$1.3M ﹤0.01%
13,182
-50
-0.4% -$5.8K
NVT icon
893
nVent Electric
NVT
$23.8B
$1.29M ﹤0.01%
7,577
+2,540
+50% +$396K
ICFI icon
894
ICF International
ICFI
$1.59B
$1.29M ﹤0.01%
17,639
-6,145
-26% -$424K
SUNB
895
Sunbelt Rentals Holdings
SUNB
$29.5B
$1.28M ﹤0.01%
17,161
+961
+6% +$72.1K
SAN icon
896
Banco Santander
SAN
$213B
$1.28M ﹤0.01%
92,526
+3,979
+4% +$49.3K
ZETA icon
897
Zeta Global
ZETA
$7.79B
$1.27M ﹤0.01%
64,387
+9,025
+16% +$167K
GRMN
898
Garmin
GRMN
$53.8B
$1.26M ﹤0.01%
5,321
+334
+7% +$81.2K
MANU icon
899
Manchester United
MANU
$3.44B
$1.26M ﹤0.01%
54,958
-2,498
-4% -$49.5K
LNT icon
900
Alliant Energy
LNT
$17.1B
$1.25M ﹤0.01%
16,437
-1,018
-6% -$74.2K
34 35
36
37 38

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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.