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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 | |
|---|---|---|---|---|---|---|
876
Hims & Hers Health
HIMS
$7.31B
| $1.08M | ﹤0.01% |
21,763
-997
| -4% | -$45.1K |
|
877
VanEck Pharmaceutical ETF
PPH
$938M
| $1.08M | ﹤0.01% |
12,295
+3,140
| +34% | +$272K |
|
878
WisdomTree US LargeCap Dividend Fund
DLN
$6.39B
| $1.08M | ﹤0.01% |
13,156
| – | – |
|
879
Realty Income
O
$59.1B
| $1.07M | ﹤0.01% |
18,563
-355
| -2% | -$20.1K |
|
880
Cognex
CGNX
$11.3B
| $1.07M | ﹤0.01% |
33,641
+12,461
| +59% | +$357K |
|
881
Hasbro
HAS
$13.2B
| $1.07M | ﹤0.01% |
14,432
-5,423
| -27% | -$342K |
|
882
Doximity
DOCS
$4.88B
| $1.06M | ﹤0.01% |
17,350
+1,259
| +8% | +$70.2K |
|
883
iShares ESG Aware 1-5 Year USD Corporate Bond ETF
SUSB
$1.3B
| $1.06M | ﹤0.01% |
42,163
+304
| +0.7% | +$7.58K |
|
884
Labcorp
LH
$25.9B
| $1.06M | ﹤0.01% |
4,022
-344
| -8% | -$83.8K |
|
885
Mueller Industries
MLI
$15.2B
| $1.06M | ﹤0.01% |
26,566
+78
| +0.3% | +$2.94K |
|
886
Fidelity MSCI Information Technology Index ETF
FTEC
$21.3B
| $1.05M | ﹤0.01% |
5,346
+9
| +0.2% | +$1.56K |
|
887
Mettler-Toledo International
MTD
$28.6B
| $1.05M | ﹤0.01% |
897
+133
| +17% | +$149K |
|
888
Flowserve
FLS
$10.2B
| $1.05M | ﹤0.01% |
20,061
+6,552
| +49% | +$308K |
|
889
Ventas
VTR
$47.9B
| $1.05M | ﹤0.01% |
16,623
+4,026
| +32% | +$263K |
|
890
Alliant Energy
LNT
$18B
| $1.05M | ﹤0.01% |
17,345
-1,173
| -6% | -$71.8K |
|
891
Bank of Montreal
BMO
$127B
| $1.05M | ﹤0.01% |
9,475
+4,591
| +94% | +$463K |
|
892
IQVIA
IQV
$39.3B
| $1.05M | ﹤0.01% |
6,649
-1,276
| -16% | -$192K |
|
893
Hewlett Packard
HPE
$70.5B
| $1.04M | ﹤0.01% |
50,823
-431
| -0.8% | -$7.22K |
|
894
APi Group
APG
$18B
| $1.04M | ﹤0.01% |
30,522
+4,330
| +17% | +$124K |
|
895
Bentley Systems
BSY
$10.6B
| $1.04M | ﹤0.01% |
19,245
+1,116
| +6% | +$51.7K |
|
896
Factset
FDS
$10.2B
| $1.04M | ﹤0.01% |
2,315
+20
| +0.9% | +$8.76K |
|
897
Atlas Energy Solutions
AESI
$1.41B
| $1.02M | ﹤0.01% |
76,246
+51,346
| +206% | +$701K |
|
898
Monster Beverage
MNST
$88.5B
| $1.02M | ﹤0.01% |
16,254
+342
| +2% | +$20.9K |
|
899
PPG Industries
PPG
$26.6B
| $1.01M | ﹤0.01% |
8,904
-4,439
| -33% | -$480K |
|
900
iShares 7-10 Year Treasury Bond ETF
IEF
$47.3B
| $1.01M | ﹤0.01% |
10,545
-3,915
| -27% | -$370K |
|
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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.