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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
SHYG icon
1751
iShares 0-5 Year High Yield Corporate Bond ETF
SHYG
$7.72B
$61.1K ﹤0.01%
1,440
-2,237
-61% -$94.9K
AQST icon
1752
Aquestive Therapeutics
AQST
$604M
$61K ﹤0.01%
14,652
+87
+0.6% +$366
ELDN icon
1753
Eledon Pharmaceuticals
ELDN
$220M
$58.9K ﹤0.01%
14,943
+427
+3% +$1.55K
FREL icon
1754
Fidelity MSCI Real Estate Index ETF
FREL
$1.42B
$58.6K ﹤0.01%
2,000
+1,411
+240% +$40.9K
RSPM icon
1755
Invesco S&P 500 Equal Weight Materials ETF
RSPM
$183M
$58.3K ﹤0.01%
1,510
– –
HAIN icon
1756
Hain Celestial
HAIN
$56.7M
$58.2K ﹤0.01%
103,961
+1,421
+1% +$1.05K
EQAL icon
1757
Invesco Russell 1000 Equal Weight ETF
EQAL
$824M
$58.2K ﹤0.01%
982
– –
JHML icon
1758
John Hancock Multifactor Large Cap ETF
JHML
$1.16B
$58K ﹤0.01%
650
– –
TECL icon
1759
Direxion Daily Technology Bull 3x ETF
TECL
$5.52B
$57.5K ﹤0.01%
+249
New +$45K
MPT
1760
Medical Properties Trust
MPT
$2.11B
$57.4K ﹤0.01%
+12,422
New +$61.6K
TLRY icon
1761
Tilray
TLRY
$549M
$56.8K ﹤0.01%
12,647
-1
-0% -$6
REAX icon
1762
Real REMAX Group Inc. Common Stock
REAX
$420M
$56.3K ﹤0.01%
3,094
+86
+3% +$1.75K
FDD icon
1763
First Trust STOXX European Select Dividend Income Fund
FDD
$937M
$55.6K ﹤0.01%
3,000
– –
WOMN icon
1764
Impact Shares Womens Empowerment ETF Trading
WOMN
$58.2M
$55.6K ﹤0.01%
1,312
+1
+0.1% +$42
RFG icon
1765
Invesco S&P MidCap 400 Pure Growth ETF
RFG
$331M
$55.4K ﹤0.01%
859
– –
IVOL icon
1766
Quadratic Interest Rate Volatility and Inflation Hedge ETF
IVOL
$255M
$54.9K ﹤0.01%
3,175
– –
AVIR icon
1767
Atea Pharmaceuticals
AVIR
$419M
$52.7K ﹤0.01%
11,325
+1,288
+13% +$6.41K
DVYE icon
1768
iShares Emerging Markets Dividend ETF
DVYE
$1.24B
$52.4K ﹤0.01%
1,625
– –
ANGX
1769
Angel Studios
ANGX
$984M
$52K ﹤0.01%
14,175
+2,400
+20% +$6.8K
IETC icon
1770
iShares US Tech Independence Focused ETF
IETC
$679M
$51.4K ﹤0.01%
479
– –
SLI
1771
Standard Lithium
SLI
$506M
$50.9K ﹤0.01%
18,500
– –
ILF icon
1772
iShares Latin America 40 ETF
ILF
$3.92B
$50.6K ﹤0.01%
1,500
– –
NEAR icon
1773
iShares Short Maturity Bond ETF
NEAR
$5.15B
$50.2K ﹤0.01%
991
-3,006
-75% -$152K
SPMB icon
1774
State Street SPDR Portfolio Mortgage Backed Bond ETF
SPMB
$7.02B
$49.7K ﹤0.01%
2,228
+1,845
+482% +$41.1K
SMOG icon
1775
VanEck Low Carbon Energy ETF
SMOG
$130M
$49.6K ﹤0.01%
339
– –
69 70
71
72 73

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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.