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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 | |
|---|---|---|---|---|---|---|
926
Dollar Tree
DLTR
$25.2B
| $902K | ﹤0.01% |
9,103
-4,072
| -31% | -$351K |
|
|
BELFB
927
Bel Fuse Inc Class B
BELFB
$4.21B
| $894K | ﹤0.01% |
9,150
| – | – |
|
928
Essential Utilities
WTRG
$11.4B
| $892K | ﹤0.01% |
24,011
+878
| +4% | +$34.2K |
|
929
Viper Energy
VNOM
$14.7B
| $889K | ﹤0.01% |
23,315
+1,215
| +5% | +$49.1K |
|
930
RE/MAX Holdings
RMAX
$242M
| $887K | ﹤0.01% |
108,376
-275
| -0.3% | -$2.13K |
|
931
StepStone Group
STEP
$3.82B
| $886K | ﹤0.01% |
15,972
-11,830
| -43% | -$633K |
|
932
iShares ESG MSCI USA Leaders ETF
SUSL
$1.2B
| $881K | ﹤0.01% |
8,135
+14
| +0.2% | +$1.4K |
|
|
CCRN
933
DELISTED
Cross Country Healthcare
CCRN
| $879K | ﹤0.01% |
67,356
-288
| -0.4% | -$3.96K |
|
934
iShares Silver Trust
SLV
$30.7B
| $878K | ﹤0.01% |
26,748
-94,604
| -78% | -$2.89M |
|
935
Ligand Pharmaceuticals
LGND
$6.36B
| $875K | ﹤0.01% |
7,701
-1,533
| -17% | -$164K |
|
936
Cleveland-Cliffs
CLF
$6.99B
| $872K | ﹤0.01% |
114,777
| – | – |
|
937
LyondellBasell Industries
LYB
$19.2B
| $867K | ﹤0.01% |
14,980
-51,703
| -78% | -$3.01M |
|
938
NextNav
NN
$2.23B
| $866K | ﹤0.01% |
57,000
| – | – |
|
939
Schwab Emerging Markets Equity ETF
SCHE
$12.9B
| $866K | ﹤0.01% |
28,719
+5,880
| +26% | +$166K |
|
940
MeiraGTx Holdings
MGTX
$1.21B
| $864K | ﹤0.01% |
132,533
| – | – |
|
941
Old National Bancorp
ONB
$10.2B
| $864K | ﹤0.01% |
40,471
+1,731
| +4% | +$35.8K |
|
942
AutoNation
AN
$6.92B
| $859K | ﹤0.01% |
4,325
-74
| -2% | -$13.4K |
|
943
Vanguard FTSE All-World ex-US Small-Cap Index Fund
VSS
$11.9B
| $855K | ﹤0.01% |
6,365
+1,293
| +25% | +$160K |
|
944
Archer Aviation
ACHR
$4.26B
| $847K | ﹤0.01% |
78,100
-373,184
| -83% | -$3.49M |
|
945
Similarweb
SMWB
$658M
| $847K | ﹤0.01% |
108,083
+20,688
| +24% | +$155K |
|
|
MZTI
946
The Marzetti Company
MZTI
$3.11B
| $847K | ﹤0.01% |
4,903
-175,051
| -97% | -$30.2M |
|
|
K
947
DELISTED
Kellanova
K
| $844K | ﹤0.01% |
10,608
+1,062
| +11% | +$86.8K |
|
|
ARIS
948
DELISTED
Aris Water Solutions
ARIS
| $842K | ﹤0.01% |
35,617
-4,782
| -12% | -$118K |
|
949
Public Storage
PSA
$61.3B
| $840K | ﹤0.01% |
2,863
+122
| +4% | +$36.1K |
|
950
iShares S&P Small-Cap 600 Value ETF
IJS
$8.34B
| $839K | ﹤0.01% |
8,436
-1,989
| -19% | -$188K |
|
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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.