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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 | |
|---|---|---|---|---|---|---|
1051
KeyCorp
KEY
$24.4B
| $577K | ﹤0.01% |
33,126
+5,980
| +22% | +$92.7K |
|
1052
iShares US Healthcare ETF
IYH
$3.54B
| $572K | ﹤0.01% |
10,136
| – | – |
|
1053
State Street SPDR Nuveen ICE Short Term Municipal Bond ETF
SHM
$3.47B
| $571K | ﹤0.01% |
11,948
-256
| -2% | -$12.1K |
|
1054
AptarGroup
ATR
$8.61B
| $571K | ﹤0.01% |
3,650
| – | – |
|
1055
Hilton Worldwide
HLT
$71.5B
| $569K | ﹤0.01% |
2,136
-666
| -24% | -$159K |
|
1056
First Trust Financials AlphaDEX Fund
FXO
$1.14B
| $566K | ﹤0.01% |
10,095
| – | – |
|
1057
Titan International
TWI
$475M
| $566K | ﹤0.01% |
55,100
-15,000
| -21% | -$116K |
|
1058
Vanguard Morningstar Mega Cap ETF
MGC
$10.4B
| $558K | ﹤0.01% |
2,480
+105
| +4% | +$21.7K |
|
1059
Pan American Silver
PAAS
$21.6B
| $557K | ﹤0.01% |
19,618
-2,100
| -10% | -$54.3K |
|
1060
National Grid
NGG
$81.3B
| $548K | ﹤0.01% |
7,465
-321
| -4% | -$22.1K |
|
|
PPL
1061
PPL Corp
PPL
$26.7B
| $547K | ﹤0.01% |
16,143
+2,068
| +15% | +$72K |
|
1062
Invesco DB Commodity Index Tracking Fund
DBC
$1.66B
| $547K | ﹤0.01% |
25,078
| – | – |
|
1063
Seagate
STX
$184B
| $546K | ﹤0.01% |
3,786
+951
| +34% | +$98.5K |
|
1064
iShares MSCI Pacific ex Japan ETF
EPP
$2.28B
| $545K | ﹤0.01% |
11,035
-656
| -6% | -$30.6K |
|
1065
Jack Henry & Associates
JKHY
$11.1B
| $544K | ﹤0.01% |
3,018
+379
| +14% | +$67.3K |
|
1066
iShares US Consumer Discretionary ETF
IYC
$1.23B
| $541K | ﹤0.01% |
5,433
-44
| -0.8% | -$4.08K |
|
1067
Bausch Health
BHC
$2.34B
| $541K | ﹤0.01% |
81,247
-3,500
| -4% | -$18K |
|
1068
MaxCyte
MXCT
$126M
| $541K | ﹤0.01% |
248,002
-2,787
| -1% | -$6.75K |
|
1069
HubSpot
HUBS
$10.5B
| $540K | ﹤0.01% |
970
-149
| -13% | -$87.3K |
|
|
CTRA
1070
DELISTED
Coterra Energy
CTRA
| $534K | ﹤0.01% |
21,035
-4,825
| -19% | -$122K |
|
1071
Invesco S&P 500 Pure Growth ETF
RPG
$2.09B
| $532K | ﹤0.01% |
11,618
-340
| -3% | -$14K |
|
1072
Ryder
R
$10.1B
| $529K | ﹤0.01% |
3,328
+797
| +31% | +$117K |
|
1073
iShares MSCI EAFE Min Vol Factor ETF
EFAV
$5.51B
| $529K | ﹤0.01% |
6,288
+163
| +3% | +$13.3K |
|
1074
Diamondback Energy
FANG
$52.7B
| $528K | ﹤0.01% |
3,846
-434
| -10% | -$60.1K |
|
1075
Masco
MAS
$15.3B
| $528K | ﹤0.01% |
8,209
+1,057
| +15% | +$66.6K |
|
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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.