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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 | |
|---|---|---|---|---|---|---|
801
The Mosaic Company
MOS
$7.33B
| $1.4M | ﹤0.01% |
38,455
+1,446
| +4% | +$46.3K |
|
|
PRMB
802
Primo Brands
PRMB
$8.54B
| $1.4M | ﹤0.01% |
47,105
-27,686
| -37% | -$885K |
|
803
Applied Digital
APLD
$8.41B
| $1.39M | ﹤0.01% |
138,163
+41,253
| +43% | +$304K |
|
804
DTE Energy
DTE
$29.1B
| $1.39M | ﹤0.01% |
10,500
+303
| +3% | +$40.7K |
|
805
Cadence Design Systems
CDNS
$93.4B
| $1.39M | ﹤0.01% |
4,512
+506
| +13% | +$147K |
|
806
Jabil
JBL
$35.8B
| $1.39M | ﹤0.01% |
6,364
-37
| -0.6% | -$6K |
|
807
Cellebrite
CLBT
$3.99B
| $1.38M | ﹤0.01% |
86,027
-32,855
| -28% | -$586K |
|
808
Vanguard Russell 1000 Growth ETF
VONG
$45B
| $1.37M | ﹤0.01% |
12,577
-3,527
| -22% | -$347K |
|
809
Freshpet
FRPT
$3.22B
| $1.37M | ﹤0.01% |
20,192
+6,937
| +52% | +$542K |
|
810
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$33B
| $1.36M | ﹤0.01% |
12,401
+2,072
| +20% | +$222K |
|
811
State Street SPDR Portfolio S&P 500 Value ETF
SPYV
$36.8B
| $1.36M | ﹤0.01% |
25,938
-9,825
| -27% | -$491K |
|
812
LegalZoom.com
LZ
$988M
| $1.34M | ﹤0.01% |
150,367
-3,185
| -2% | -$26.7K |
|
813
Globant
GLOB
$1.61B
| $1.34M | ﹤0.01% |
14,728
-4,121
| -22% | -$440K |
|
|
AMTM
814
Amentum Holdings
AMTM
$6.05B
| $1.34M | ﹤0.01% |
56,568
+2,368
| +4% | +$49.5K |
|
815
Eagle Materials
EXP
$6.57B
| $1.33M | ﹤0.01% |
6,591
-209
| -3% | -$45K |
|
816
FlexShares Quality Dividend Defensive Index Fund
QDEF
$562M
| $1.33M | ﹤0.01% |
17,983
+64
| +0.4% | +$4.49K |
|
817
Graco
GGG
$13.5B
| $1.33M | ﹤0.01% |
15,451
-2,009
| -12% | -$166K |
|
818
Innovator US Equity Buffer ETF July
BJUL
$353M
| $1.32M | ﹤0.01% |
27,916
-425
| -1% | -$18.7K |
|
819
Waters Corp
WAT
$39.9B
| $1.31M | ﹤0.01% |
3,757
-377
| -9% | -$130K |
|
820
MGM Resorts International
MGM
$11.2B
| $1.3M | ﹤0.01% |
37,692
-335
| -0.9% | -$10.6K |
|
821
Old Republic International
ORI
$10.4B
| $1.28M | ﹤0.01% |
33,427
-902
| -3% | -$33.9K |
|
822
VSE Corp
VSEC
$6.12B
| $1.28M | ﹤0.01% |
9,744
+151
| +2% | +$18.8K |
|
823
First Trust NASDAQ-100 Technology Index Fund
QTEC
$4.83B
| $1.27M | ﹤0.01% |
5,986
| – | – |
|
824
argenx
ARGX
$54.1B
| $1.27M | ﹤0.01% |
2,310
+231
| +11% | +$134K |
|
825
First Solar
FSLR
$26.9B
| $1.26M | ﹤0.01% |
7,596
+413
| +6% | +$61K |
|
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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.