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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 | |
|---|---|---|---|---|---|---|
1176
Hormel Foods
HRL
$13.8B
| $382K | ﹤0.01% |
12,628
+5,296
| +72% | +$160K |
|
1177
First Community Corp
FCCO
$322M
| $381K | ﹤0.01% |
15,620
| – | – |
|
1178
Ameren
AEE
$30.1B
| $379K | ﹤0.01% |
3,948
+85
| +2% | +$8.25K |
|
1179
Extra Space Storage
EXR
$31.6B
| $379K | ﹤0.01% |
2,568
-125
| -5% | -$18.2K |
|
1180
Nu Holdings
NU
$66.9B
| $375K | ﹤0.01% |
27,305
-50
| -0.2% | -$599 |
|
1181
Alamos Gold
AGI
$13.9B
| $373K | ﹤0.01% |
14,058
-600
| -4% | -$16K |
|
1182
iShares Ultra Short Duration Bond Active ETF
ICSH
$8.13B
| $372K | ﹤0.01% |
7,344
-1,001
| -12% | -$50.6K |
|
1183
RELX
RELX
$62B
| $367K | ﹤0.01% |
6,759
-299
| -4% | -$15.8K |
|
|
VG
1184
Venture Global Inc
VG
$32.9B
| $367K | ﹤0.01% |
+23,570
| New | +$273K |
|
1185
Amplify Mobile Payments ETF
IPAY
$182M
| $366K | ﹤0.01% |
6,115
-460
| -7% | -$25.3K |
|
1186
Hayward Holdings
HAYW
$3.36B
| $365K | ﹤0.01% |
26,449
| – | – |
|
1187
Fortune Brands Innovations
FBIN
$6.06B
| $364K | ﹤0.01% |
7,076
-452
| -6% | -$23.7K |
|
1188
IonQ
IONQ
$16.6B
| $362K | ﹤0.01% |
+8,425
| New | +$282K |
|
1189
nVent Electric
NVT
$26.7B
| $362K | ﹤0.01% |
4,940
-6,419
| -57% | -$394K |
|
1190
State Street SPDR S&P Aerospace & Defense ETF
XAR
$6.49B
| $361K | ﹤0.01% |
1,713
+78
| +5% | +$14.1K |
|
1191
Hain Celestial
HAIN
$53.7M
| $361K | ﹤0.01% |
237,511
+31,005
| +15% | +$72.4K |
|
1192
Agilon Health
AGL
$1.6B
| $360K | ﹤0.01% |
6,256
+537
| +9% | +$43.1K |
|
1193
State Street SPDR S&P 600 Small Cap Value ETF
SLYV
$5.03B
| $358K | ﹤0.01% |
4,486
-2,536
| -36% | -$192K |
|
1194
SoundThinking
SSTI
$103M
| $357K | ﹤0.01% |
27,328
| – | – |
|
1195
Alkami Technology
ALKT
$2.11B
| $355K | ﹤0.01% |
+11,794
| New | +$328K |
|
|
TLN
1196
Talen Energy Corp
TLN
$16.7B
| $355K | ﹤0.01% |
+1,221
| New | +$290K |
|
1197
Federal Realty Investment Trust
FRT
$10.3B
| $355K | ﹤0.01% |
+3,733
| New | +$353K |
|
1198
MGE Energy Inc
MGEE
$3.08B
| $354K | ﹤0.01% |
4,000
| – | – |
|
1199
BlackRock ESG Capital Allocation Term Trust
ECAT
$1.56B
| $351K | ﹤0.01% |
21,871
| – | – |
|
1200
FirstEnergy
FE
$27.5B
| $350K | ﹤0.01% |
8,694
-1,951
| -18% | -$80.5K |
|
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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.