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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
FDIS icon
1576
Fidelity MSCI Consumer Discretionary Index ETF
FDIS
$1.74B
$60.8K ﹤0.01%
646
-81
-11% -$7.13K
MODD icon
1577
Modular Medical
MODD
$11.9M
$59.3K ﹤0.01%
2,653
+400
+18% +$10.7K
NURE icon
1578
Nuveen Short-Term REIT ETF
NURE
$35.5M
$59.3K ﹤0.01%
2,000
– –
TMCI icon
1579
Treace Medical Concepts
TMCI
$309M
$59.3K ﹤0.01%
10,080
– –
PXF icon
1580
Invesco FTSE RAFI Developed Markets ex-US ETF
PXF
$2.96B
$59.1K ﹤0.01%
1,030
+4
+0.4% +$217
DGRS icon
1581
WisdomTree Trust WisdomTree US SmallCap Quality Dividend Growth Fund
DGRS
$414M
$59.1K ﹤0.01%
1,270
– –
IAI icon
1582
iShares US Broker-Dealers & Securities Exchanges ETF
IAI
$1.36B
$58.9K ﹤0.01%
348
+311
+841% +$45.9K
AIVI icon
1583
WisdomTree International AI Enhanced Value Fund
AIVI
$63.9M
$58.3K ﹤0.01%
1,210
– –
IGE icon
1584
iShares North American Natural Resources ETF
IGE
$758M
$57.9K ﹤0.01%
1,309
+94
+8% +$4.03K
KCE icon
1585
State Street SPDR S&P Capital Markets ETF
KCE
$466M
$57.8K ﹤0.01%
399
-25
-6% -$3.25K
GVI icon
1586
iShares Intermediate Government/Credit Bond ETF
GVI
$3.78B
$57.7K ﹤0.01%
540
-17
-3% -$1.8K
EWH icon
1587
iShares MSCI Hong Kong ETF
EWH
$1.22B
$57.5K ﹤0.01%
2,896
-827
-22% -$15.1K
SPYX icon
1588
State Street SPDR S&P 500 Fossil Fuel Reserves Free ETF
SPYX
$2.84B
$57.4K ﹤0.01%
1,128
– –
LRGF icon
1589
iShares US Equity Factor ETF
LRGF
$3.71B
$57.1K ﹤0.01%
891
– –
TBF icon
1590
ProShares Short 20+ Year Treasury ETF
TBF
$104M
$56.8K ﹤0.01%
2,350
– –
IDU icon
1591
iShares US Utilities ETF
IDU
$1.4B
$56.8K ﹤0.01%
543
– –
ITEQ icon
1592
Amplify BlueStar Israel Technology ETF
ITEQ
$119M
$56.5K ﹤0.01%
1,000
– –
LGLV icon
1593
State Street SPDR US Large Cap Low Volatility Index ETF
LGLV
$1.23B
$56.4K ﹤0.01%
+323
New +$55.3K
SCHJ icon
1594
Schwab 1-5 Year Corporate Bond ETF
SCHJ
$848M
$56.1K ﹤0.01%
2,262
– –
FNCL icon
1595
Fidelity MSCI Financials Index ETF
FNCL
$2.4B
$55.7K ﹤0.01%
752
– –
HCAT icon
1596
Health Catalyst
HCAT
$128M
$53.7K ﹤0.01%
14,256
+1,247
+10% +$4.91K
WOMN icon
1597
Impact Shares Womens Empowerment ETF Trading
WOMN
$59M
$53.6K ﹤0.01%
1,350
– –
ISCG icon
1598
iShares Morningstar Small-Cap Growth ETF
ISCG
$1.02B
$52.8K ﹤0.01%
1,062
– –
FBT icon
1599
First Trust NYSE Arca Biotechnology Index Fund
FBT
$2.83B
$52.4K ﹤0.01%
325
– –
BBUS icon
1600
JPMorgan BetaBuilders US Equity ETF
BBUS
$9.21B
$52.3K ﹤0.01%
467
+407
+678% +$42.1K
62 63
64
65 66

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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.