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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 | |
|---|---|---|---|---|---|---|
676
Vanguard Short-Term Corporate Bond ETF
VCSH
$44.7B
| $2.43M | 0.01% |
30,523
-3,478
| -10% | -$274K |
|
677
Gladstone Investment Corp
GAIN
$661M
| $2.42M | 0.01% |
169,571
+1,135
| +0.7% | +$15.9K |
|
678
Brookfield Infrastructure Partners
BIP
$18B
| $2.41M | 0.01% |
71,913
+38,657
| +116% | +$1.21M |
|
679
State Street SPDR Portfolio Developed World ex-US ETF
SPDW
$41.6B
| $2.38M | 0.01% |
58,773
+22,900
| +64% | +$878K |
|
680
Lennar Class A
LEN
$21.2B
| $2.37M | 0.01% |
21,463
+238
| +1% | +$25.8K |
|
681
iShares MSCI Japan ETF
EWJ
$23B
| $2.37M | 0.01% |
31,562
-35,137
| -53% | -$2.5M |
|
682
Schwab Short-Term US Treasury ETF
SCHO
$12.8B
| $2.34M | 0.01% |
96,110
-1,400
| -1% | -$34K |
|
683
Trade Desk
TTD
$6.49B
| $2.34M | 0.01% |
32,534
-2,169
| -6% | -$138K |
|
|
TTAN
684
ServiceTitan Inc
TTAN
$8.19B
| $2.33M | 0.01% |
+21,735
| New | +$2.43M |
|
685
State Street SPDR Nuveen ICE High Yield Municipal Bond ETF
HYMB
$3.19B
| $2.33M | 0.01% |
93,945
+1,265
| +1% | +$31.2K |
|
|
OKLO
686
Oklo
OKLO
$8.42B
| $2.33M | 0.01% |
+41,540
| New | +$1.6M |
|
687
Wintrust Financial
WTFC
$10.7B
| $2.33M | 0.01% |
18,755
-300
| -2% | -$34.4K |
|
|
SCHR
688
Schwab Intermediately-Term US Treasury ETF
SCHR
$13.3B
| $2.32M | 0.01% |
92,882
-887
| -0.9% | -$22K |
|
|
B
689
Barrick Mining
B
$73.2B
| $2.27M | 0.01% |
108,799
-5,364
| -5% | -$105K |
|
690
Invesco Aerospace & Defense ETF
PPA
$8.7B
| $2.26M | 0.01% |
15,972
+993
| +7% | +$126K |
|
691
Vanguard Intermediate-Term Treasury ETF
VGIT
$41.7B
| $2.26M | 0.01% |
37,834
-696
| -2% | -$41.2K |
|
692
ProShares Ultra Semiconductors
USD
$2.95B
| $2.24M | 0.01% |
60,552
-40
| -0.1% | -$1K |
|
693
PACCAR
PCAR
$70.1B
| $2.24M | 0.01% |
23,519
+1,349
| +6% | +$125K |
|
694
Vanguard Financials ETF
VFH
$13.6B
| $2.23M | 0.01% |
17,497
+7,119
| +69% | +$849K |
|
695
Prologis
PLD
$133B
| $2.21M | 0.01% |
21,031
-5,910
| -22% | -$620K |
|
696
Twist Bioscience
TWST
$7.25B
| $2.2M | 0.01% |
59,721
-2,245
| -4% | -$77.6K |
|
697
Zimmer Biomet
ZBH
$18.4B
| $2.17M | 0.01% |
23,831
-8,202
| -26% | -$793K |
|
698
CBRE Group
CBRE
$42.9B
| $2.16M | 0.01% |
15,405
-5,028
| -25% | -$636K |
|
699
Affiliated Managers Group
AMG
$9.76B
| $2.14M | 0.01% |
10,885
-1,364
| -11% | -$237K |
|
700
NetApp
NTAP
$37.2B
| $2.13M | 0.01% |
20,035
-547
| -3% | -$51.9K |
|
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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.