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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
IRDM icon
451
Iridium Communications
IRDM
$5.29B
$6.02M 0.02%
199,611
-4,350
-2% -$113K
HSY icon
452
Hershey
HSY
$36.6B
$6.02M 0.02%
36,285
-2,662
-7% -$439K
ULTA icon
453
Ulta Beauty
ULTA
$24.3B
$5.99M 0.02%
12,799
-1,550
-11% -$641K
CTVA icon
454
Corteva
CTVA
$51.3B
$5.97M 0.02%
80,139
-771
-1% -$51.4K
FICO icon
455
Fair Isaac
FICO
$22.5B
$5.96M 0.02%
3,261
+760
+30% +$1.43M
MEC icon
456
Mayville Engineering Co
MEC
$617M
$5.96M 0.02%
373,448
+281,198
+305% +$4.02M
CGUS icon
457
Capital Group Core Equity ETF
CGUS
$11.9B
$5.89M 0.02%
159,403
+3,795
+2% +$129K
NOBL icon
458
ProShares S&P 500 Dividend Aristocrats ETF
NOBL
$12B
$5.87M 0.02%
116,544
+762
+0.7% +$37.7K
PRF icon
459
Invesco FTSE RAFI US 1000 ETF
PRF
$10B
$5.73M 0.02%
135,637
+3,122
+2% +$125K
BOTZ icon
460
Global X Robotics & Artificial Intelligence ETF
BOTZ
$3.51B
$5.71M 0.02%
174,748
-961
-0.5% -$28.5K
JEPQ icon
461
JPMorgan Nasdaq Equity Premium Income ETF
JEPQ
$40.9B
$5.68M 0.02%
104,435
-6,550
-6% -$338K
SCHX icon
462
Schwab US Large- Cap ETF
SCHX
$74.5B
$5.63M 0.02%
230,325
+123,920
+116% +$2.8M
ENB icon
463
Enbridge
ENB
$112B
$5.57M 0.02%
122,994
+2,042
+2% +$92.6K
NUE icon
464
Nucor
NUE
$62.1B
$5.56M 0.02%
42,936
-465
-1% -$54.3K
VRT icon
465
Vertiv
VRT
$105B
$5.55M 0.02%
43,259
+2,405
+6% +$234K
THRY icon
466
Thryv Holdings
THRY
$108M
$5.55M 0.02%
456,057
+46,119
+11% +$596K
XLU icon
467
State Street Utilities Select Sector SPDR ETF
XLU
$22.5B
$5.54M 0.02%
135,748
+12,086
+10% +$482K
TGT icon
468
Target
TGT
$68B
$5.54M 0.02%
56,108
-7,786
-12% -$748K
EQT icon
469
EQT Corp
EQT
$32.3B
$5.53M 0.02%
94,848
+22,481
+31% +$1.21M
FIVE icon
470
Five Below
FIVE
$13.5B
$5.5M 0.02%
41,923
-7,828
-16% -$762K
IYW icon
471
iShares US Technology ETF
IYW
$25.2B
$5.48M 0.02%
31,641
+933
+3% +$141K
DD icon
472
DuPont de Nemours
DD
$19.2B
$5.41M 0.02%
62,838
+241
+0.4% +$20K
XMMO icon
473
Invesco S&P MidCap Momentum ETF
XMMO
$7.53B
$5.38M 0.01%
41,797
+38,851
+1,319% +$4.64M
DGRO icon
474
iShares Core Dividend Growth ETF
DGRO
$43.5B
$5.35M 0.01%
83,689
+6,427
+8% +$392K
MLM icon
475
Martin Marietta Materials
MLM
$33B
$5.31M 0.01%
9,682
-38
-0.4% -$20.1K
17 18
19
20 21

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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.