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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
POOL icon
801
Pool Corp
POOL
$6.06B
$1.75M ﹤0.01%
8,161
-29,107
-78% -$5.81M
SPSM icon
802
State Street SPDR Portfolio S&P 600 Small Cap ETF
SPSM
$16.1B
$1.75M ﹤0.01%
30,404
-1,050
-3% -$56.1K
ELV icon
803
Elevance Health
ELV
$90.6B
$1.75M ﹤0.01%
4,531
+258
+6% +$95.7K
STZ icon
804
Constellation Brands
STZ
$21.1B
$1.75M ﹤0.01%
12,595
-2,261
-15% -$336K
DAL icon
805
Delta Air Lines
DAL
$51.9B
$1.74M ﹤0.01%
18,599
+3,561
+24% +$269K
GNR icon
806
State Street SPDR S&P Global Natural Resources ETF
GNR
$5.25B
$1.74M ﹤0.01%
25,834
+15,432
+148% +$1.13M
PINE
807
Alpine Income Property Trust
PINE
$321M
$1.74M ﹤0.01%
83,693
+26,178
+46% +$508K
BBCA icon
808
JPMorgan BetaBuilders Canada ETF
BBCA
$11.1B
$1.74M ﹤0.01%
17,469
-170
-1% -$16.9K
IVOG icon
809
Vanguard S&P Mid-Cap 400 Growth ETF
IVOG
$1.58B
$1.74M ﹤0.01%
11,868
+19
+0.2% +$2.62K
GGG icon
810
Graco
GGG
$12.4B
$1.74M ﹤0.01%
22,954
-6,116
-21% -$483K
VLUE icon
811
iShares MSCI USA Value Factor ETF
VLUE
$9.55B
$1.73M ﹤0.01%
8,670
+74
+0.9% +$13.3K
MNR icon
812
Mach Natural Resources
MNR
$1.87B
$1.73M ﹤0.01%
136,729
+74,300
+119% +$991K
AVB
813
DELISTED
AvalonBay Communities
AVB
$1.72M ﹤0.01%
9,127
-440
-5% -$79.5K
VIS icon
814
Vanguard Industrials ETF
VIS
$7.72B
$1.72M ﹤0.01%
4,768
-14,673
-75% -$4.97M
IYG icon
815
iShares US Financial Services ETF
IYG
$2.18B
$1.72M ﹤0.01%
18,973
+16,691
+731% +$1.46M
AEHR icon
816
Aehr Test Systems
AEHR
$2.66B
$1.71M ﹤0.01%
+17,838
New +$1.63M
BBEU icon
817
JPMorgan BetaBuilders Europe ETF
BBEU
$9.17B
$1.71M ﹤0.01%
22,022
+43
+0.2% +$3.3K
OSK icon
818
Oshkosh
OSK
$8.84B
$1.7M ﹤0.01%
11,056
+2,096
+23% +$295K
MGTX icon
819
MeiraGTx Holdings
MGTX
$1.23B
$1.7M ﹤0.01%
125,478
+56
+0% +$556
HROW icon
820
Harrow
HROW
$1.27B
$1.69M ﹤0.01%
39,880
+7,120
+22% +$265K
EXG icon
821
Eaton Vance Tax-Managed Global Diversified Equity Income Fund
EXG
$2.93B
$1.69M ﹤0.01%
171,945
-3,283
-2% -$30.8K
CCC
822
CCC Intelligent Solutions
CCC
$3.89B
$1.68M ﹤0.01%
325,749
+45,734
+16% +$226K
CLS icon
823
Celestica
CLS
$40B
$1.68M ﹤0.01%
4,601
+1,533
+50% +$575K
JBTM
824
JBT Marel
JBTM
$5.78B
$1.67M ﹤0.01%
11,491
+3,783
+49% +$490K
MGM icon
825
MGM Resorts International
MGM
$9.87B
$1.66M ﹤0.01%
34,811
+44
+0.1% +$1.83K
31 32
33
34 35

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TWC
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PIF
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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.