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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
COO icon
776
Cooper Companies
COO
$14.5B
$1.55M ﹤0.01%
21,745
-13,314
-38% -$1.02M
LEU icon
777
Centrus Energy
LEU
$3.82B
$1.54M ﹤0.01%
+8,403
New +$897K
RWO icon
778
State Street SPDR Dow Jones Global Real Estate ETF
RWO
$1.3B
$1.54M ﹤0.01%
34,827
-5,473
-14% -$238K
TFC icon
779
Truist Financial
TFC
$64B
$1.53M ﹤0.01%
35,511
+3,173
+10% +$124K
CALF icon
780
Pacer US Small Cap Cash Cows 100 ETF
CALF
$3.82B
$1.52M ﹤0.01%
38,242
-6,658
-15% -$249K
SPSM icon
781
State Street SPDR Portfolio S&P 600 Small Cap ETF
SPSM
$17.4B
$1.52M ﹤0.01%
35,732
-13,600
-28% -$548K
XRAY icon
782
Dentsply Sirona
XRAY
$2.43B
$1.52M ﹤0.01%
95,751
-402
-0.4% -$6.01K
STR
783
DELISTED
Sitio Royalties
STR
$1.52M ﹤0.01%
82,590
-1,699
-2% -$30.5K
PMAR icon
784
Innovator US Equity Power Buffer ETF March
PMAR
$772M
$1.52M ﹤0.01%
35,895
-41,362
-54% -$1.67M
IONS icon
785
Ionis Pharmaceuticals
IONS
$9.4B
$1.5M ﹤0.01%
37,891
-490
-1% -$16K
POCT icon
786
Innovator US Equity Power Buffer ETF October
POCT
$973M
$1.49M ﹤0.01%
36,098
-89,179
-71% -$3.52M
SONY icon
787
Sony
SONY
$138B
$1.49M ﹤0.01%
57,209
-824
-1% -$20.6K
AIG icon
788
American International
AIG
$41.3B
$1.48M ﹤0.01%
17,323
+1,366
+9% +$114K
SPLV icon
789
Invesco S&P 500 Low Volatility ETF
SPLV
$7.21B
$1.48M ﹤0.01%
20,315
-1,136
-5% -$82.2K
VV icon
790
Vanguard Morningstar Large-Cap ETF
VV
$54.3B
$1.47M ﹤0.01%
5,165
+653
+14% +$172K
DELL icon
791
Dell
DELL
$293B
$1.47M ﹤0.01%
11,956
-34,622
-74% -$3.54M
DRS icon
792
Leonardo DRS
DRS
$12B
$1.46M ﹤0.01%
31,511
+105
+0.3% +$4.22K
FLOT icon
793
iShares Floating Rate Bond ETF
FLOT
$10.3B
$1.45M ﹤0.01%
28,337
-984
-3% -$50K
VYMI icon
794
Vanguard International High Dividend Yield ETF
VYMI
$20.9B
$1.43M ﹤0.01%
17,881
+783
+5% +$59.9K
GM icon
795
General Motors
GM
$76.8B
$1.42M ﹤0.01%
28,925
-2,892
-9% -$137K
RSPT icon
796
Invesco S&P 500 Equal Weight Technology ETF
RSPT
$5.87B
$1.42M ﹤0.01%
34,881
– –
MLPA icon
797
Global X MLP ETF
MLPA
$2.26B
$1.42M ﹤0.01%
28,210
+436
+2% +$21.7K
IJT icon
798
iShares S&P Small-Cap 600 Growth ETF
IJT
$8.42B
$1.42M ﹤0.01%
10,641
-362
-3% -$45.4K
SPSB icon
799
State Street SPDR Portfolio Short Term Corporate Bond ETF
SPSB
$10.7B
$1.41M ﹤0.01%
46,667
-1,171
-2% -$35.1K
JCI icon
800
Johnson Controls International
JCI
$92.2B
$1.41M ﹤0.01%
13,324
+2,867
+27% +$264K
30 31
32
33 34

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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.