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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
(+8.6%)
Cap. Flow
-$222M
Cap. Flow
% of AUM
-0.62%
Top 10 Holdings %
Top 10 Hldgs %
24.91%
Holding
1,911
New
111
Increased
662
Reduced
757
Closed
87
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
GE Vernova
GEV
|
+$116M |
| 2 |
Boeing
BA
|
+$34M |
| 3 |
CWAN
Clearwater Analytics
CWAN
|
+$31.2M |
| 4 |
NVIDIA
NVDA
|
+$27.5M |
| 5 |
Cloudflare
NET
|
+$26.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
XYZ
Block Inc
XYZ
|
+$79.4M |
| 2 |
Zoetis
ZTS
|
+$41.3M |
| 3 |
Accenture
ACN
|
+$40.8M |
| 4 |
iShares Core S&P Mid-Cap ETF
IJH
|
+$40.7M |
| 5 |
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 | |
|---|---|---|---|---|---|---|
1201
Toronto Dominion Bank
TD
$200B
| $349K | ﹤0.01% |
4,758
+1
| +0% | +$65 |
|
1202
PTC
PTC
$16B
| $349K | ﹤0.01% |
2,026
-516
| -20% | -$83.2K |
|
1203
Murphy USA
MUSA
$9.61B
| $349K | ﹤0.01% |
+858
| New | +$390K |
|
1204
FlexShares Global Upstream Natural Resources Index Fund
GUNR
$7.32B
| $349K | ﹤0.01% |
8,696
+2,138
| +33% | +$82.6K |
|
1205
Baker Hughes
BKR
$61.1B
| $348K | ﹤0.01% |
9,087
-1,642
| -15% | -$62K |
|
1206
CMS Energy
CMS
$22.3B
| $347K | ﹤0.01% |
5,015
-42
| -0.8% | -$2.99K |
|
1207
Vanguard S&P Small-Cap 600 ETF
VIOO
$4.25B
| $347K | ﹤0.01% |
3,431
| – | – |
|
1208
Codere Online
CDRO
$408M
| $346K | ﹤0.01% |
40,702
-1,500
| -4% | -$11.2K |
|
1209
iShares MSCI United Kingdom ETF
EWU
$4.16B
| $345K | ﹤0.01% |
8,687
+57
| +0.7% | +$2.19K |
|
1210
CenterPoint Energy
CNP
$26.8B
| $343K | ﹤0.01% |
9,331
+202
| +2% | +$7.49K |
|
1211
Genpact
G
$5.76B
| $343K | ﹤0.01% |
7,788
+2,050
| +36% | +$92.8K |
|
|
GAP
1212
The Gap Inc
GAP
$7.37B
| $342K | ﹤0.01% |
15,665
-622
| -4% | -$13.9K |
|
1213
Repligen
RGEN
$9.25B
| $342K | ﹤0.01% |
2,746
+676
| +33% | +$86K |
|
1214
Globe Life
GL
$14.3B
| $341K | ﹤0.01% |
2,740
+1
| +0% | +$121 |
|
1215
Grand Canyon Education
LOPE
$3.98B
| $340K | ﹤0.01% |
1,797
| – | – |
|
1216
Albertsons Companies
ACI
$5.83B
| $339K | ﹤0.01% |
15,782
| – | – |
|
1217
Reinsurance Group of America
RGA
$16.1B
| $337K | ﹤0.01% |
+1,700
| New | +$332K |
|
1218
Principal Exchange-Traded Funds Principal US Mega-Cap ETF
USMC
$3.68B
| $335K | ﹤0.01% |
5,351
| – | – |
|
1219
Lamb Weston
LW
$7.19B
| $334K | ﹤0.01% |
6,433
-527
| -8% | -$28.2K |
|
1220
PDS Biotechnology
PDSB
$43.4M
| $333K | ﹤0.01% |
250,000
-7,200
| -3% | -$9.78K |
|
1221
Stanley Black & Decker
SWK
$15.7B
| $331K | ﹤0.01% |
4,879
-3,922
| -45% | -$253K |
|
1222
Huntington Ingalls Industries
HII
$12.8B
| $330K | ﹤0.01% |
+1,368
| New | +$306K |
|
|
BRKL
1223
DELISTED
Brookline Bancorp
BRKL
| $329K | ﹤0.01% |
31,210
| – | – |
|
1224
Compass Diversified
CODI
$828M
| $329K | ﹤0.01% |
52,365
-621,954
| -92% | -$6.92M |
|
1225
Ambev
ABEV
$46.4B
| $328K | ﹤0.01% |
136,022
-154
| -0.1% | -$375 |
|
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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.