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 | |
|---|---|---|---|---|---|---|
1176
State Street SPDR S&P 600 Small Cap Growth ETF
SLYG
$5.23B
| $423K | ﹤0.01% |
4,486
+111
| +3% | +$10.2K |
|
1177
MYR Group
MYRG
$5.1B
| $423K | ﹤0.01% |
2,031
-650
| -24% | -$121K |
|
1178
Murphy USA
MUSA
$10.4B
| $421K | ﹤0.01% |
1,083
+225
| +26% | +$89.1K |
|
1179
BigBear.ai
BBAI
$1.6B
| $417K | ﹤0.01% |
63,956
-245,645
| -79% | -$1.57M |
|
1180
Enerpac Tool Group
EPAC
$1.89B
| $417K | ﹤0.01% |
10,160
| – | – |
|
1181
Titan International
TWI
$438M
| $417K | ﹤0.01% |
55,100
| – | – |
|
1182
Tilray
TLRY
$640M
| $416K | ﹤0.01% |
24,072
+98
| +0.4% | +$937 |
|
1183
FirstCash
FCFS
$9.14B
| $415K | ﹤0.01% |
2,617
+779
| +42% | +$109K |
|
1184
Opendoor
OPEN
$3.54B
| $414K | ﹤0.01% |
+53,691
| New | +$218K |
|
1185
PTC
PTC
$16.7B
| $411K | ﹤0.01% |
2,026
| – | – |
|
1186
CMS Energy
CMS
$22.1B
| $410K | ﹤0.01% |
5,598
+583
| +12% | +$41.9K |
|
1187
Paycom
PAYC
$10.1B
| $407K | ﹤0.01% |
1,957
-61
| -3% | -$13.7K |
|
1188
Lincoln National
LNC
$8.67B
| $402K | ﹤0.01% |
9,972
+1,011
| +11% | +$39.1K |
|
1189
Textron
TXT
$15.1B
| $402K | ﹤0.01% |
4,755
-31
| -0.6% | -$2.52K |
|
1190
Cognizant
CTSH
$26.7B
| $401K | ﹤0.01% |
5,974
-2,825
| -32% | -$204K |
|
1191
Globus Medical
GMED
$11.5B
| $400K | ﹤0.01% |
6,988
-139
| -2% | -$8K |
|
1192
Southwest Airlines
LUV
$22B
| $397K | ﹤0.01% |
12,455
-940
| -7% | -$30.7K |
|
1193
Crane Co
CR
$12.7B
| $396K | ﹤0.01% |
2,149
+12
| +0.6% | +$2.26K |
|
1194
Lamb Weston
LW
$7.39B
| $395K | ﹤0.01% |
6,804
+371
| +6% | +$20.3K |
|
1195
First Financial Corp
THFF
$975M
| $395K | ﹤0.01% |
7,000
-1,220
| -15% | -$69.1K |
|
1196
Riot Platforms
RIOT
$7.21B
| $395K | ﹤0.01% |
20,750
| – | – |
|
1197
Hain Celestial
HAIN
$53.9M
| $395K | ﹤0.01% |
249,838
+12,327
| +5% | +$21K |
|
1198
Grand Canyon Education
LOPE
$3.79B
| $394K | ﹤0.01% |
1,797
| – | – |
|
1199
Archer Aviation
ACHR
$5.37B
| $394K | ﹤0.01% |
41,174
-36,926
| -47% | -$365K |
|
1200
Harmony Biosciences
HRMY
$2.24B
| $394K | ﹤0.01% |
+14,293
| New | +$492K |
|
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.