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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
CIBR icon
501
First Trust NASDAQ Cybersecurity ETF
CIBR
$15.3B
$4.83M 0.01%
63,970
+3,780
+6% +$259K
IJAN icon
502
Innovator International Developed Power Buffer ETF January
IJAN
$263M
$4.82M 0.01%
140,820
-81,550
-37% -$2.68M
CHKP icon
503
Check Point Software Technologies
CHKP
$13.1B
$4.81M 0.01%
21,759
+1,023
+5% +$225K
IJUL icon
504
Innovator International Developed Power Buffer ETF July
IJUL
$254M
$4.8M 0.01%
150,275
-13,080
-8% -$396K
SU icon
505
Suncor Energy
SU
$70.3B
$4.78M 0.01%
127,625
-17,657
-12% -$639K
CNI icon
506
Canadian National Railway
CNI
$76.6B
$4.76M 0.01%
45,746
-158
-0.3% -$16.1K
ADM icon
507
Archer Daniels Midland
ADM
$36.9B
$4.75M 0.01%
89,927
+2,689
+3% +$131K
VICI icon
508
VICI Properties
VICI
$29.4B
$4.74M 0.01%
145,525
+4,640
+3% +$148K
COP icon
509
ConocoPhillips
COP
$141B
$4.71M 0.01%
52,502
-329
-0.6% -$29.6K
LRCX icon
510
Lam Research
LRCX
$390B
$4.66M 0.01%
47,911
-5,921
-11% -$470K
GXO icon
511
GXO Logistics
GXO
$5.55B
$4.64M 0.01%
95,351
+1,053
+1% +$42K
SCHG icon
512
Schwab US Large-Cap Growth ETF
SCHG
$62.8B
$4.64M 0.01%
158,902
-45,840
-22% -$1.21M
TRU icon
513
TransUnion
TRU
$15.3B
$4.63M 0.01%
52,624
-21,239
-29% -$1.77M
TTE icon
514
TotalEnergies
TTE
$190B
$4.62M 0.01%
75,227
+7,512
+11% +$446K
DHI icon
515
D.R. Horton
DHI
$42.3B
$4.6M 0.01%
35,653
-1,087
-3% -$134K
XLI icon
516
State Street Industrial Select Sector SPDR ETF
XLI
$33.7B
$4.55M 0.01%
30,831
-468
-1% -$63.8K
EEM icon
517
iShares MSCI Emerging Markets ETF
EEM
$29.5B
$4.52M 0.01%
93,694
-54,671
-37% -$2.46M
SCHF icon
518
Schwab International Equity ETF
SCHF
$68.7B
$4.52M 0.01%
204,451
+42,627
+26% +$887K
RAL
519
Ralliant Corp
RAL
$7.46B
$4.5M 0.01%
+84,904
New +$4.18M
FNF icon
520
Fidelity National Financial
FNF
$13.5B
$4.46M 0.01%
79,519
+519
+0.7% +$30.3K
KJAN icon
521
Innovator US Small Cap Power Buffer ETF January
KJAN
$327M
$4.45M 0.01%
118,736
+2,572
+2% +$92.4K
IGSB icon
522
iShares 1-5 Year Investment Grade Corporate Bond ETF
IGSB
$23B
$4.45M 0.01%
84,263
-4,174
-5% -$218K
HYG icon
523
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$16.6B
$4.43M 0.01%
54,955
-1,313
-2% -$103K
LHX icon
524
L3Harris
LHX
$53.4B
$4.41M 0.01%
17,571
-5,331
-23% -$1.22M
DLR icon
525
Digital Realty Trust
DLR
$71.7B
$4.4M 0.01%
25,234
+594
+2% +$97.1K
19 20
21
22 23

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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.