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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
OXY.WS icon
1901
Occidental Petroleum Corp Warrants
OXY.WS
$37.4B
$8.87K ﹤0.01%
333
-3
-0.9% -$104
IEZ icon
1902
iShares US Oil Equipment & Services ETF
IEZ
$364M
$8.69K ﹤0.01%
323
– –
PBR.A icon
1903
Petrobras Class A
PBR.A
$123B
$8.39K ﹤0.01%
573
-384
-40% -$6.77K
CUT icon
1904
Invesco MSCI Global Timber ETF
CUT
$30.4M
$8.38K ﹤0.01%
300
– –
EEMS icon
1905
iShares MSCI Emerging Markets Small-Cap ETF
EEMS
$368M
$8.35K ﹤0.01%
110
– –
ELD icon
1906
WisdomTree Emerging Markets Local Debt Fund
ELD
$141M
$8.24K ﹤0.01%
287
+1
+0.3% +$29
PDN icon
1907
Invesco FTSE RAFI Developed Markets ex-US Small-Mid ETF
PDN
$358M
$7.91K ﹤0.01%
176
– –
FCOM icon
1908
Fidelity MSCI Communication Services Index ETF
FCOM
$1.88B
$7.57K ﹤0.01%
109
-301
-73% -$21.8K
REM icon
1909
iShares Mortgage Real Estate ETF
REM
$512M
$7.41K ﹤0.01%
+336
New +$7.44K
HTZWW
1910
Hertz Global Holdings Warrants
HTZWW
$81.5M
$7.41K ﹤0.01%
6,795
+1,193
+21% +$3.14K
NANR icon
1911
State Street SPDR S&P North American Natural Resources ETF
NANR
$836M
$7.06K ﹤0.01%
94
-678
-88% -$55.5K
PTLC icon
1912
Pacer Trendpilot US Large Cap ETF
PTLC
$3.31B
$6.99K ﹤0.01%
120
– –
DFE icon
1913
WisdomTree Europe SmallCap Dividend Fund
DFE
$167M
$6.84K ﹤0.01%
95
– –
FALN icon
1914
iShares Fallen Angels USD Bond ETF
FALN
$1.62B
$6.73K ﹤0.01%
247
-38,260
-99% -$1.04M
VSH icon
1915
Vishay Intertechnology
VSH
$4.72B
$6.67K ﹤0.01%
124
+48
+63% +$1.96K
IEUS icon
1916
iShares MSCI Europe Small-Cap ETF
IEUS
$174M
$6.51K ﹤0.01%
+94
New +$6.72K
LEGR icon
1917
First Trust Indxx Innovative Transaction & Process ETF
LEGR
$130M
$6.42K ﹤0.01%
100
– –
FXG icon
1918
First Trust Consumer Staples AlphaDEX Fund
FXG
$222M
$6.26K ﹤0.01%
100
– –
SPIP icon
1919
State Street SPDR Portfolio TIPS ETF
SPIP
$1.01B
$6.21K ﹤0.01%
242
– –
KCE icon
1920
State Street SPDR S&P Capital Markets ETF
KCE
$459M
$6.18K ﹤0.01%
42
– –
IPAC icon
1921
iShares Core MSCI Pacific ETF
IPAC
$2.78B
$6.14K ﹤0.01%
+75
New +$6.1K
CYPH
1922
Cypherpunk Technologies Inc
CYPH
$278M
$6.12K ﹤0.01%
10,000
– –
PRN icon
1923
Invesco Dorsey Wright Industrials Momentum ETF
PRN
$355M
$5.74K ﹤0.01%
22
– –
RSPS icon
1924
Invesco S&P 500 Equal Weight Consumer Staples ETF
RSPS
$242M
$5.25K ﹤0.01%
175
– –
EDEN icon
1925
iShares MSCI Denmark ETF
EDEN
$189M
$5.08K ﹤0.01%
46
+25
+119% +$2.75K
75 76
77
78 79

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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.