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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
QBTS icon
1151
D-Wave Quantum Inc. Common Stock
QBTS
$7.73B
$409K ﹤0.01%
27,963
-2,475
-8% -$29.1K
CCEP icon
1152
Coca-Cola Europacific Partners
CCEP
$47.9B
$409K ﹤0.01%
4,415
-9
-0.2% -$806
SYF icon
1153
Synchrony
SYF
$25.6B
$407K ﹤0.01%
6,105
+1,686
+38% +$94.3K
CR icon
1154
Crane Co
CR
$12.7B
$406K ﹤0.01%
2,137
– –
TRI icon
1155
Thomson Reuters
TRI
$44.1B
$405K ﹤0.01%
1,984
+8
+0.4% +$1.52K
KDP icon
1156
Keurig Dr Pepper
KDP
$40.8B
$403K ﹤0.01%
12,201
+3,861
+46% +$131K
BOCT icon
1157
Innovator US Equity Buffer ETF October
BOCT
$289M
$403K ﹤0.01%
8,857
– –
PKG icon
1158
Packaging Corp of America
PKG
$22.8B
$393K ﹤0.01%
2,087
-79
-4% -$14.9K
THW
1159
abrdn World Healthcare Fund
THW
$551M
$393K ﹤0.01%
38,300
– –
GSLC icon
1160
Goldman Sachs ActiveBeta US Large Cap Equity ETF
GSLC
$15.5B
$391K ﹤0.01%
3,225
+741
+30% +$83.4K
TDVG icon
1161
T. Rowe Price Dividend Growth ETF
TDVG
$1.45B
$390K ﹤0.01%
9,194
+159
+2% +$6.42K
RXRX icon
1162
Recursion Pharmaceuticals
RXRX
$1.73B
$390K ﹤0.01%
77,000
-37,500
-33% -$184K
CORT icon
1163
Corcept Therapeutics
CORT
$12B
$389K ﹤0.01%
5,305
+55
+1% +$3.99K
BE icon
1164
Bloom Energy
BE
$64.6B
$389K ﹤0.01%
16,246
+437
+3% +$8.46K
SLYG icon
1165
State Street SPDR S&P 600 Small Cap Growth ETF
SLYG
$5.2B
$388K ﹤0.01%
4,375
+121
+3% +$10.1K
OLED icon
1166
Universal Display
OLED
$4.19B
$387K ﹤0.01%
2,505
+122
+5% +$17.1K
SMDV icon
1167
ProShares Russell 2000 Dividend Growers ETF
SMDV
$707M
$387K ﹤0.01%
5,946
– –
UTHR icon
1168
United Therapeutics
UTHR
$23.1B
$386K ﹤0.01%
1,343
+243
+22% +$72.6K
IDEV icon
1169
iShares Core MSCI International Developed Markets ETF
IDEV
$32.6B
$385K ﹤0.01%
5,068
+2,381
+89% +$172K
EMN icon
1170
Eastman Chemical
EMN
$8.42B
$384K ﹤0.01%
5,148
+1,760
+52% +$138K
TXT icon
1171
Textron
TXT
$15.4B
$384K ﹤0.01%
4,786
– –
ABM icon
1172
ABM Industries
ABM
$2.84B
$384K ﹤0.01%
8,130
+1
+0% +$48
GEF icon
1173
Greif
GEF
$5.04B
$383K ﹤0.01%
5,894
– –
MRP
1174
Millrose Properties Inc
MRP
$4.81B
$382K ﹤0.01%
13,414
+170
+1% +$4.49K
HASI icon
1175
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$5.2B
$382K ﹤0.01%
14,229
-3,543
-20% -$91.8K
45 46
47
48 49

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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.