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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+12.61%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$36B
AUM Growth
+$2.85B
Cap. Flow
-$222M
Cap. Flow %
-0.62%
Top 10 Hldgs %
24.91%
Holding
1,911
New
111
Increased
662
Reduced
757
Closed
87

Top Buys

Rank Stock Value
1
GEV icon
GE Vernova
GEV
+$116M
2
BA icon
Boeing
BA
+$34M
3
CWAN
Clearwater Analytics
CWAN
+$31.2M
4
NVDA icon
NVIDIA
NVDA
+$27.5M
5
NET icon
Cloudflare
NET
+$26.2M

Top Sells

Rank Stock Value
1
XYZ
Block Inc
XYZ
+$79.4M
2
ZTS icon
Zoetis
ZTS
+$41.3M
3
ACN icon
Accenture
ACN
+$40.8M
4
IJH icon
iShares Core S&P Mid-Cap ETF
IJH
+$40.7M
5
UNH icon
UnitedHealth
UNH
+$36.4M

Sector Composition

Rank Sector Weight
1 Technology 27.47%
2 Financials 13.92%
3 Industrials 12.94%
4 Healthcare 11.51%
5 Consumer Discretionary 7.98%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AGNC icon
1476
AGNC Investment
AGNC
$12.9B
$133K ﹤0.01%
14,450
+1,962
+16% +$17.6K
SPHD icon
1477
Invesco S&P 500 High Dividend Low Volatility ETF
SPHD
$3.38B
$132K ﹤0.01%
2,770
-119
-4% -$5.63K
DWM icon
1478
WisdomTree International Equity Fund
DWM
$697M
$131K ﹤0.01%
2,063
+28
+1% +$1.7K
ADPT icon
1479
Adaptive Biotechnologies
ADPT
$3.97B
$131K ﹤0.01%
11,249
– –
SLQT icon
1480
SelectQuote
SLQT
$121M
$131K ﹤0.01%
55,000
– –
GENI icon
1481
Genius Sports
GENI
$2.11B
$131K ﹤0.01%
12,550
– –
ETHO icon
1482
Amplify Etho Climate Leadership US ETF
ETHO
$195M
$129K ﹤0.01%
2,225
+9
+0.4% +$496
COOK icon
1483
Traeger
COOK
$172M
$125K ﹤0.01%
1,458
+15
+1% +$1.15K
FLRN icon
1484
State Street SPDR Bloomberg Investment Grade Floating Rate ETF
FLRN
$3.09B
$125K ﹤0.01%
4,043
-232
-5% -$7.12K
GO icon
1485
Grocery Outlet
GO
$980M
$124K ﹤0.01%
10,000
– –
DGS icon
1486
WisdomTree Emerging Markets SmallCap Dividend Fund
DGS
$1.77B
$124K ﹤0.01%
2,242
– –
MCHI icon
1487
iShares MSCI China ETF
MCHI
$6.38B
$124K ﹤0.01%
2,246
– –
RING icon
1488
iShares MSCI Global Gold Miners ETF
RING
$2.56B
$124K ﹤0.01%
2,826
+1,140
+68% +$47.4K
VIOG icon
1489
Vanguard S&P Small-Cap 600 Growth ETF
VIOG
$1.08B
$122K ﹤0.01%
1,065
– –
FHLC icon
1490
Fidelity MSCI Health Care Index ETF
FHLC
$3.36B
$120K ﹤0.01%
1,883
+276
+17% +$17.6K
IGIB icon
1491
iShares 5-10 Year Investment Grade Corporate Bond ETF
IGIB
$18.6B
$120K ﹤0.01%
2,249
-176
-7% -$9.19K
CQQQ icon
1492
Invesco China Technology ETF
CQQQ
$3.22B
$117K ﹤0.01%
2,652
– –
RWL icon
1493
Invesco S&P 500 Revenue ETF
RWL
$9.86B
$117K ﹤0.01%
1,118
+1
+0.1% +$99
OPPE
1494
WisdomTree European Opportunities Fund
OPPE
$295M
$116K ﹤0.01%
2,500
-500
-17% -$22.1K
XIFR
1495
XPLR Infrastructure LP
XIFR
$1.08B
$116K ﹤0.01%
14,115
-29,964
-68% -$260K
LUMN icon
1496
Lumen
LUMN
$6.44B
$114K ﹤0.01%
+26,125
New +$101K
FV icon
1497
First Trust Dorsey Wright Focus 5 ETF
FV
$3.77B
$113K ﹤0.01%
1,913
+3
+0.2% +$167
SCHH icon
1498
Schwab US REIT ETF
SCHH
$11.4B
$113K ﹤0.01%
5,336
+906
+20% +$19K
JNK icon
1499
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$6.92B
$112K ﹤0.01%
1,154
+825
+251% +$78.3K
XHB icon
1500
State Street SPDR S&P Homebuilders ETF
XHB
$1.56B
$107K ﹤0.01%
1,089
+325
+43% +$30.9K
58 59
60
61 62

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William Blair & Company's Q2 2025 Portfolio in Review

As of Q2 2025, William Blair & Company held 1,911 positions worth $36B, up 8.6% from $33.2B the previous quarter. Its ten largest holdings account for 25% of the portfolio.

William Blair & Company's Q2 2025 filing shows 111 new, 662 increased, 757 reduced and 87 closed positions. Its largest new stake was Affirm: 304,959 shares worth $21.1M. The largest sale was Block Inc, an estimated $79.4M.

By sector, the portfolio is most concentrated in Technology at 27% of assets, up from 26% a quarter earlier, followed by Financials and Industrials.

  • William Blair & Company's largest Q2 2025 buy was Affirm: 304,959 shares worth $21.1M.
  • William Blair & Company added most to GE Vernova in Q2 2025, an estimated $116M increase.
  • William Blair & Company's biggest Q2 2025 reduction was Block Inc, cutting an estimated $79.4M.
  • William Blair & Company fully exited Discover Financial Services in Q2 2025, selling an estimated $5.21M.
  • William Blair & Company's ten largest holdings make up 25% of its $36B portfolio in Q2 2025.
  • William Blair & Company opened 111 new positions and closed 87 in Q2 2025.
  • William Blair & Company's portfolio value rose 8.6% quarter-over-quarter to $36B.

Based on William Blair & Company's 13F filing for Q2 2025, filed 24 Jul 2025.