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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 | |
|---|---|---|---|---|---|---|
|
MRC
1301
DELISTED
MRC Global
MRC
| $267K | ﹤0.01% |
19,500
| – | – |
|
1302
Backblaze
BLZE
$1.16B
| $265K | ﹤0.01% |
48,194
| – | – |
|
1303
American States Water
AWR
$3.46B
| $264K | ﹤0.01% |
3,447
+302
| +10% | +$23.7K |
|
1304
VeriSign
VRSN
$26.6B
| $264K | ﹤0.01% |
914
| – | – |
|
1305
FT Vest Fund of Buffer ETFs
BUFR
$10.3B
| $264K | ﹤0.01% |
8,291
+567
| +7% | +$17.1K |
|
1306
iShares MSCI Europe Financials ETF
EUFN
$4.29B
| $262K | ﹤0.01% |
8,288
+228
| +3% | +$6.89K |
|
|
GRAL
1307
GRAIL Inc
GRAL
$3.1B
| $262K | ﹤0.01% |
+5,088
| New | +$184K |
|
1308
Dimensional US Targeted Value ETF
DFAT
$14.7B
| $262K | ﹤0.01% |
4,848
+805
| +20% | +$41K |
|
1309
First Trust Cloud Computing ETF
SKYY
$3.12B
| $261K | ﹤0.01% |
2,145
+97
| +5% | +$10.6K |
|
|
WCLD
1310
WisdomTree Cloud Computing Fund
WCLD
$297M
| $260K | ﹤0.01% |
7,195
-50
| -0.7% | -$1.7K |
|
1311
Ball Corp
BALL
$16.8B
| $260K | ﹤0.01% |
4,632
+137
| +3% | +$7.16K |
|
1312
Fortis
FTS
$28.7B
| $260K | ﹤0.01% |
5,443
| – | – |
|
1313
Portland General Electric
POR
$5.77B
| $260K | ﹤0.01% |
6,390
+464
| +8% | +$19.5K |
|
1314
Autoliv
ALV
$9B
| $259K | ﹤0.01% |
+2,312
| New | +$226K |
|
1315
State Street SPDR Portfolio Aggregate Bond ETF
SPAB
$9.77B
| $258K | ﹤0.01% |
10,091
+1,751
| +21% | +$44.3K |
|
1316
Allegion
ALLE
$14.4B
| $257K | ﹤0.01% |
1,782
-295
| -14% | -$40.3K |
|
1317
CNO Financial Group
CNO
$5.1B
| $256K | ﹤0.01% |
6,624
-1,998
| -23% | -$76.1K |
|
1318
CareTrust REIT
CTRE
$9.74B
| $255K | ﹤0.01% |
8,344
| – | – |
|
1319
Rocket Pharmaceuticals
RCKT
$394M
| $255K | ﹤0.01% |
104,211
-7,264
| -7% | -$36.8K |
|
1320
Principal Financial Group
PFG
$24.3B
| $255K | ﹤0.01% |
3,207
-282
| -8% | -$21.6K |
|
1321
Skyworks Solutions
SWKS
$10.6B
| $254K | ﹤0.01% |
3,411
+91
| +3% | +$6.08K |
|
|
AII
1322
American Integrity Insurance
AII
$411M
| $253K | ﹤0.01% |
+13,780
| New | +$232K |
|
1323
Advanced Energy
AEIS
$13B
| $253K | ﹤0.01% |
+1,910
| New | +$210K |
|
1324
Tyson Foods
TSN
$20.4B
| $253K | ﹤0.01% |
+4,517
| New | +$260K |
|
1325
SouthState Bank Corp
SSB
$10.5B
| $252K | ﹤0.01% |
+2,742
| New | +$241K |
|
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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.