We are live on
!
Find out more
William Blair & Company Portfolio holdings
AUM
$38.4B
1-Year Est. Return
25.71%
This Fund
S&P 500
This Quarter
Est. Return
+7.16%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$37.6B
AUM Growth
+$1.57B
(+4.4%)
Cap. Flow
-$160M
Cap. Flow
% of AUM
-0.43%
Top 10 Holdings %
Top 10 Hldgs %
26.02%
Holding
1,919
New
98
Increased
697
Reduced
774
Closed
75
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Meta Platforms (Facebook)
META
|
+$76.1M |
| 2 |
Applovin
APP
|
+$75.3M |
| 3 |
ServiceNow
NOW
|
+$66.6M |
| 4 |
CWAN
Clearwater Analytics
CWAN
|
+$65.8M |
| 5 |
Diamondback Energy
FANG
|
+$30.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
CYBR
CyberArk
CYBR
|
+$70.7M |
| 2 |
Adobe
ADBE
|
+$61.7M |
| 3 |
Microsoft
MSFT
|
+$45.7M |
| 4 |
Workday
WDAY
|
+$42.6M |
| 5 |
Pool Corp
POOL
|
+$41.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 27.36% |
| 2 | Financials | 13.36% |
| 3 | Industrials | 12.59% |
| 4 | Healthcare | 10.97% |
| 5 | Consumer Discretionary | 7.45% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1301
Equitable Holdings
EQH
$14.4B
| $301K | ﹤0.01% |
5,937
+745
| +14% | +$39.5K |
|
1302
ATI
ATI
$30.9B
| $300K | ﹤0.01% |
3,687
+100
| +3% | +$8.1K |
|
1303
iShares US Regional Banks ETF
IAT
$689M
| $300K | ﹤0.01% |
5,702
+4,135
| +264% | +$216K |
|
1304
Vodafone
VOD
$37.5B
| $299K | ﹤0.01% |
25,771
+3,023
| +13% | +$34.5K |
|
1305
Kratos Defense & Security Solutions
KTOS
$11.8B
| $296K | ﹤0.01% |
+3,240
| New | +$207K |
|
1306
East-West Bancorp
EWBC
$18.6B
| $296K | ﹤0.01% |
2,781
+11
| +0.4% | +$1.16K |
|
1307
Franklin Electric
FELE
$4.68B
| $296K | ﹤0.01% |
3,104
+674
| +28% | +$63.8K |
|
1308
Insight Enterprises
NSIT
$4.6B
| $295K | ﹤0.01% |
2,598
+398
| +18% | +$51.8K |
|
1309
MarketAxess Holdings
MKTX
$5.72B
| $294K | ﹤0.01% |
1,687
+400
| +31% | +$78.2K |
|
1310
iShare MSCI Eurozone ETF
EZU
$9.96B
| $294K | ﹤0.01% |
4,740
+2,159
| +84% | +$130K |
|
1311
Arch Capital
ACGL
$33.5B
| $293K | ﹤0.01% |
3,234
-123
| -4% | -$11K |
|
1312
Dimensional US Targeted Value ETF
DFAT
$14.8B
| $290K | ﹤0.01% |
4,990
+142
| +3% | +$8.09K |
|
1313
CareTrust REIT
CTRE
$9.18B
| $289K | ﹤0.01% |
8,344
| – | – |
|
1314
Globant
GLOB
$1.77B
| $289K | ﹤0.01% |
5,033
-9,695
| -66% | -$714K |
|
1315
Eastman Chemical
EMN
$8.43B
| $288K | ﹤0.01% |
4,565
-583
| -11% | -$40.7K |
|
1316
MaxLinear
MXL
$6.95B
| $287K | ﹤0.01% |
17,828
-1,020
| -5% | -$16K |
|
1317
iShares MSCI Europe Financials ETF
EUFN
$4.3B
| $285K | ﹤0.01% |
8,306
+18
| +0.2% | +$597 |
|
1318
Illumina
ILMN
$29.1B
| $285K | ﹤0.01% |
3,002
+416
| +16% | +$41.3K |
|
1319
ON Semiconductor
ON
$31.8B
| $284K | ﹤0.01% |
5,763
+497
| +9% | +$26.2K |
|
1320
Leggett & Platt
LEG
$1.32B
| $284K | ﹤0.01% |
32,000
| – | – |
|
|
GAP
1321
The Gap Inc
GAP
$7.34B
| $281K | ﹤0.01% |
13,156
-2,509
| -16% | -$54.2K |
|
|
MRC
1322
DELISTED
MRC Global
MRC
| $281K | ﹤0.01% |
19,512
+12
| +0.1% | +$171 |
|
1323
GameStop
GME
$8.33B
| $281K | ﹤0.01% |
+10,311
| New | +$244K |
|
1324
Compass Diversified
CODI
$924M
| $281K | ﹤0.01% |
42,409
-9,956
| -19% | -$68.6K |
|
1325
Scorpio Tankers
STNG
$3.93B
| $280K | ﹤0.01% |
+5,000
| New | +$247K |
|
Similar funds
HF
William Blair & Company's Q3 2025 Portfolio in Review
As of Q3 2025, William Blair & Company held 1,919 positions worth $37.6B, up 4.4% from $36B the previous quarter. Its ten largest holdings account for 26% of the portfolio.
William Blair & Company's Q3 2025 filing shows 98 new, 697 increased, 774 reduced and 75 closed positions. Its largest new stake was Miami International Holdings: 363,765 shares worth $14.6M. The largest sale was CyberArk, an estimated $70.7M.
By sector, the portfolio is most concentrated in Technology at 27% of assets, down from 27% a quarter earlier, followed by Financials and Industrials.
- William Blair & Company's largest Q3 2025 buy was Miami International Holdings: 363,765 shares worth $14.6M.
- William Blair & Company added most to Meta Platforms (Facebook) in Q3 2025, an estimated $76.1M increase.
- William Blair & Company's biggest Q3 2025 reduction was CyberArk, cutting an estimated $70.7M.
- William Blair & Company fully exited Stride in Q3 2025, selling an estimated $7.47M.
- William Blair & Company's ten largest holdings make up 26% of its $37.6B portfolio in Q3 2025.
- William Blair & Company opened 98 new positions and closed 75 in Q3 2025.
- William Blair & Company's portfolio value rose 4.4% quarter-over-quarter to $37.6B.
Based on William Blair & Company's 13F filing for Q3 2025, filed 12 Nov 2025.