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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 | |
|---|---|---|---|---|---|---|
826
Innovator US Equity Power Buffer ETF November
PNOV
$895M
| $1.26M | ﹤0.01% |
31,792
| – | – |
|
827
Invesco S&P 500 Top 50 ETF
XLG
$11B
| $1.25M | ﹤0.01% |
24,079
-106
| -0.4% | -$5.04K |
|
828
Western Digital
WDC
$150B
| $1.24M | ﹤0.01% |
19,402
-121
| -0.6% | -$5.76K |
|
829
Core Scientific Inc Tranche 1 Warrants
CORZW
$1.41B
| $1.24M | ﹤0.01% |
114,509
| – | – |
|
830
NXP Semiconductors
NXPI
$60.4B
| $1.24M | ﹤0.01% |
5,669
+304
| +6% | +$59.4K |
|
831
JPMorgan BetaBuilders Canada ETF
BBCA
$11.2B
| $1.23M | ﹤0.01% |
15,303
+11
| +0.1% | +$833 |
|
832
Avery Dennison
AVY
$13.4B
| $1.23M | ﹤0.01% |
7,029
+447
| +7% | +$78.3K |
|
833
W.P. Carey
WPC
$16.4B
| $1.23M | ﹤0.01% |
19,752
+30
| +0.2% | +$1.85K |
|
834
AST SpaceMobile
ASTS
$21.5B
| $1.23M | ﹤0.01% |
26,327
+15,900
| +152% | +$460K |
|
835
State Street
STT
$50.7B
| $1.23M | ﹤0.01% |
11,540
-425
| -4% | -$39.3K |
|
836
GoDaddy
GDDY
$11.5B
| $1.22M | ﹤0.01% |
6,802
-198
| -3% | -$35.5K |
|
837
Skyward Specialty Insurance
SKWD
$2.58B
| $1.22M | ﹤0.01% |
21,125
-3,197
| -13% | -$184K |
|
838
Vanguard S&P 500 Growth ETF
VOOG
$27.2B
| $1.22M | ﹤0.01% |
18,396
+1,656
| +10% | +$98.5K |
|
839
Ingersoll Rand
IR
$33.7B
| $1.21M | ﹤0.01% |
14,572
-792
| -5% | -$62.4K |
|
840
OGE Energy
OGE
$9.71B
| $1.21M | ﹤0.01% |
27,220
+655
| +2% | +$29.1K |
|
841
iShares MSCI Emerging Markets Asia ETF
EEMA
$860M
| $1.21M | ﹤0.01% |
14,600
-5
| -0% | -$381 |
|
842
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $1.19M | ﹤0.01% |
20,202
-3,102
| -13% | -$182K |
|
843
DoorDash
DASH
$93.7B
| $1.19M | ﹤0.01% |
4,814
-41
| -0.8% | -$8.22K |
|
844
Roblox
RBLX
$27B
| $1.18M | ﹤0.01% |
11,222
+53
| +0.5% | +$4.16K |
|
845
Lennox International
LII
$15.2B
| $1.18M | ﹤0.01% |
2,057
+299
| +17% | +$167K |
|
846
Astera Labs
ALAB
$58B
| $1.17M | ﹤0.01% |
12,975
+4,350
| +50% | +$344K |
|
847
Cameco
CCJ
$42.4B
| $1.16M | ﹤0.01% |
15,688
-4,301
| -22% | -$230K |
|
848
Ferrari
RACE
$72.5B
| $1.16M | ﹤0.01% |
2,370
-110
| -4% | -$51.1K |
|
849
Delta Air Lines
DAL
$60.1B
| $1.16M | ﹤0.01% |
23,628
+1,138
| +5% | +$52.3K |
|
850
Innovator US Equity Power Buffer ETF September
PSEP
$847M
| $1.16M | ﹤0.01% |
28,399
-76,120
| -73% | -$2.97M |
|
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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.