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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
DLTH icon
1526
Duluth Holdings
DLTH
$163M
$227K ﹤0.01%
50,750
-62,760
-55% -$227K
LUMN icon
1527
Lumen
LUMN
$7.1B
$227K ﹤0.01%
29,596
+350
+1% +$3.07K
COPX icon
1528
Global X Copper Miners ETF NEW
COPX
$7.47B
$226K ﹤0.01%
2,938
+379
+15% +$31.5K
KB icon
1529
KB Financial Group
KB
$45.3B
$226K ﹤0.01%
+2,149
New +$227K
HRL icon
1530
Hormel Foods
HRL
$11.5B
$225K ﹤0.01%
+9,080
New +$202K
KWR icon
1531
Quaker Houghton
KWR
$2.65B
$225K ﹤0.01%
+1,415
New +$199K
AMZA icon
1532
InfraCap MLP ETF
AMZA
$488M
$224K ﹤0.01%
4,857
+1,557
+47% +$72.1K
PB icon
1533
Prosperity Bancshares
PB
$8.53B
$223K ﹤0.01%
+3,054
New +$212K
PFXF icon
1534
VanEck Preferred Securities ex Financials ETF
PFXF
$2.36B
$223K ﹤0.01%
12,494
-149,167
-92% -$2.74M
FSLY icon
1535
Fastly Inc
FSLY
$3.91B
$223K ﹤0.01%
12,129
+10
+0.1% +$217
SGDM icon
1536
Sprott Gold Miners ETF
SGDM
$697M
$221K ﹤0.01%
3,520
– –
RSPH icon
1537
Invesco S&P 500 Equal Weight Health Care ETF
RSPH
$848M
$221K ﹤0.01%
6,664
– –
PBF icon
1538
PBF Energy
PBF
$8.79B
$221K ﹤0.01%
+4,852
New +$202K
SCHK icon
1539
Schwab 1000 Index ETF
SCHK
$5.78B
$221K ﹤0.01%
6,124
– –
CTSH icon
1540
Cognizant
CTSH
$28.7B
$220K ﹤0.01%
5,690
-797
-12% -$42K
EUSA icon
1541
iShares MSCI USA Equal Weighted ETF
EUSA
$1.91B
$220K ﹤0.01%
1,925
– –
ZNOV
1542
Innovator Equity Defined Protection ETF - 1 Yr November
ZNOV
$104M
$219K ﹤0.01%
7,968
– –
ASGI
1543
abrdn Global Infrastructure Income Fund
ASGI
$646M
$218K ﹤0.01%
9,392
– –
SIL icon
1544
Global X Silver Miners ETF NEW
SIL
$4.91B
$218K ﹤0.01%
2,815
+165
+6% +$14.8K
EXR icon
1545
Extra Space Storage
EXR
$29B
$218K ﹤0.01%
+1,499
New +$214K
TRP icon
1546
TC Energy
TRP
$63.5B
$217K ﹤0.01%
3,280
-7,515
-70% -$497K
QUS icon
1547
State Street SPDR MSCI USA StrategicFactors ETF
QUS
$1.57B
$216K ﹤0.01%
1,157
– –
CVCO icon
1548
Cavco Industries
CVCO
$4.13B
$214K ﹤0.01%
349
-180
-34% -$95.6K
VIRT icon
1549
Virtu Financial
VIRT
$5.13B
$214K ﹤0.01%
+3,596
New +$189K
VSNT
1550
Versant Media Group
VSNT
$5.21B
$214K ﹤0.01%
+5,941
New +$239K
60 61
62
63 64

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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.