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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
SPTL icon
1651
State Street SPDR Portfolio Long Term Treasury ETF
SPTL
$10.9B
$123K ﹤0.01%
4,673
+456
+11% +$11.9K
UGP icon
1652
Ultrapar
UGP
$7.93B
$122K ﹤0.01%
24,325
-954
-4% -$5.25K
GIFT
1653
Giftify Inc
GIFT
$24.8M
$122K ﹤0.01%
128,553
– –
NULV icon
1654
Nuveen ESG Large-Cap Value ETF
NULV
$2.53B
$121K ﹤0.01%
2,428
– –
EVEX icon
1655
Eve Holding
EVEX
$739M
$120K ﹤0.01%
47,938
+902
+2% +$2.6K
PRTH icon
1656
Priority Technology Holdings
PRTH
$495M
$120K ﹤0.01%
17,995
+542
+3% +$3.14K
DUOT icon
1657
Duos Technologies
DUOT
$259M
$120K ﹤0.01%
+10,000
New +$101K
SMR icon
1658
NuScale Power
SMR
$3.49B
$120K ﹤0.01%
+11,944
New +$135K
TLH icon
1659
iShares 10-20 Year Treasury Bond ETF
TLH
$11B
$119K ﹤0.01%
1,186
-1,765
-60% -$176K
SPHD icon
1660
Invesco S&P 500 High Dividend Low Volatility ETF
SPHD
$3.38B
$119K ﹤0.01%
2,335
+11
+0.5% +$550
PNQI icon
1661
Invesco NASDAQ Internet ETF
PNQI
$541M
$116K ﹤0.01%
2,546
+1
+0% +$47
QCLN icon
1662
First Trust NASDAQ Clean Edge Green Energy Index Fund
QCLN
$547M
$115K ﹤0.01%
1,881
– –
AUR icon
1663
Aurora
AUR
$12.9B
$115K ﹤0.01%
16,910
+969
+6% +$5.93K
CGBD icon
1664
Carlyle Secured Lending
CGBD
$782M
$115K ﹤0.01%
10,894
– –
COMT icon
1665
iShares GSCI Commodity Dynamic Roll Strategy ETF
COMT
$1.41B
$113K ﹤0.01%
3,729
+470
+14% +$15.9K
DBEU icon
1666
Xtrackers MSCI Europe Hedged Equity ETF
DBEU
$769M
$113K ﹤0.01%
2,091
– –
SCHP icon
1667
Schwab US TIPS ETF
SCHP
$16B
$113K ﹤0.01%
4,258
-343
-7% -$9.15K
XT icon
1668
iShares Future Exponential Technologies ETF
XT
$3.9B
$112K ﹤0.01%
1,354
+315
+30% +$24.6K
OPPE
1669
WisdomTree European Opportunities Fund
OPPE
$334M
$112K ﹤0.01%
2,000
– –
FPX icon
1670
First Trust US Equity Opportunities ETF
FPX
$1.44B
$110K ﹤0.01%
533
– –
DSX icon
1671
Diana Shipping
DSX
$368M
$108K ﹤0.01%
51,608
+241
+0.5% +$595
VTHR icon
1672
Vanguard Russell 3000 ETF
VTHR
$4.79B
$108K ﹤0.01%
325
– –
OABI icon
1673
OmniAb
OABI
$651M
$107K ﹤0.01%
43,394
+178
+0.4% +$353
VMBS icon
1674
Vanguard Mortgage-Backed Securities ETF
VMBS
$15.6B
$106K ﹤0.01%
2,266
-164
-7% -$7.67K
CLF icon
1675
Cleveland-Cliffs
CLF
$6.65B
$106K ﹤0.01%
11,253
+381
+4% +$4.19K
65 66
67
68 69

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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.