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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
PCY icon
1501
Invesco Emerging Markets Sovereign Debt ETF
PCY
$1.4B
$106K ﹤0.01%
5,192
-931
-15% -$18.4K
VTHR icon
1502
Vanguard Russell 3000 ETF
VTHR
$4.85B
$105K ﹤0.01%
386
+81
+27% +$20.4K
NULV icon
1503
Nuveen ESG Large-Cap Value ETF
NULV
$2.28B
$102K ﹤0.01%
2,428
– –
EWW icon
1504
iShares MSCI Mexico ETF
EWW
$1.99B
$101K ﹤0.01%
1,673
-824
-33% -$47.5K
RSPG icon
1505
Invesco S&P 500 Equal Weight Energy ETF
RSPG
$546M
$101K ﹤0.01%
1,350
-1,023
-43% -$74.7K
AG icon
1506
First Majestic Silver
AG
$9.07B
$99.8K ﹤0.01%
12,074
-998
-8% -$6.71K
TLRY icon
1507
Tilray
TLRY
$622M
$99.3K ﹤0.01%
23,974
+8,601
+56% +$39K
ITB icon
1508
iShares US Home Construction ETF
ITB
$2.35B
$99.3K ﹤0.01%
1,066
-1,100
-51% -$100K
AEF
1509
abrdn Emerging Markets Equity Income Fund
AEF
$367M
$98.3K ﹤0.01%
16,543
-623
-4% -$3.31K
SJNK icon
1510
State Street SPDR Bloomberg Short Term High Yield Bond ETF
SJNK
$4.76B
$98.1K ﹤0.01%
3,850
+41
+1% +$1.02K
SPYD icon
1511
State Street SPDR Portfolio S&P 500 High Dividend ETF
SPYD
$8.78B
$97.1K ﹤0.01%
2,288
– –
FXL icon
1512
First Trust Technology AlphaDEX Fund
FXL
$2.79B
$96.8K ﹤0.01%
615
– –
NXE icon
1513
NexGen Energy
NXE
$6.99B
$96.6K ﹤0.01%
13,921
– –
EEMV icon
1514
iShares MSCI Emerging Markets Min Vol Factor ETF
EEMV
$3.56B
$96.2K ﹤0.01%
1,532
-33
-2% -$1.99K
ARDX icon
1515
Ardelyx
ARDX
$997M
$96K ﹤0.01%
24,500
-285
-1% -$1.18K
FEZ icon
1516
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.55B
$95.6K ﹤0.01%
1,600
– –
PIO icon
1517
Invesco Global Water ETF
PIO
$283M
$94.4K ﹤0.01%
2,113
+1
+0% +$42
XJR icon
1518
iShares ESG Screened S&P Small-Cap ETF
XJR
$190M
$94.1K ﹤0.01%
2,379
– –
TAN icon
1519
Invesco Solar ETF
TAN
$1.49B
$93.5K ﹤0.01%
2,730
-3,050
-53% -$95.8K
PID icon
1520
Invesco International Dividend Achievers ETF
PID
$919M
$93.5K ﹤0.01%
4,560
– –
GNL icon
1521
Global Net Lease
GNL
$1.95B
$92.9K ﹤0.01%
12,300
– –
SNAP icon
1522
Snap
SNAP
$9.01B
$91K ﹤0.01%
10,471
+100
+1% +$830
CDXS icon
1523
Codexis
CDXS
$158M
$89.9K ﹤0.01%
36,830
– –
EAGG icon
1524
iShares ESG Aware US Aggregate Bond ETF
EAGG
$4.97B
$88.9K ﹤0.01%
1,871
+11
+0.6% +$517
JHML icon
1525
John Hancock Multifactor Large Cap ETF
JHML
$1.2B
$88.5K ﹤0.01%
1,207
– –
59 60
61
62 63

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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.