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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 | |
|---|---|---|---|---|---|---|
951
D-Wave Quantum Inc. Common Stock
QBTS
$7.78B
| $873K | ﹤0.01% |
35,317
+7,354
| +26% | +$134K |
|
952
DoubleVerify
DV
$2.04B
| $863K | ﹤0.01% |
72,071
-533
| -0.7% | -$7.9K |
|
953
Gogo Inc
GOGO
$377M
| $862K | ﹤0.01% |
100,394
-6,094
| -6% | -$77.3K |
|
954
EnerSys
ENS
$7.2B
| $855K | ﹤0.01% |
7,569
-968
| -11% | -$95.2K |
|
955
Sun Life Financial
SLF
$44.8B
| $855K | ﹤0.01% |
14,240
-71
| -0.5% | -$4.27K |
|
956
Civista Bancshares
CIVB
$595M
| $853K | ﹤0.01% |
42,000
-5,000
| -11% | -$105K |
|
957
Invesco Actively Managed Exch-Traded Commodity Fd Tr Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF
PDBC
$6.61B
| $852K | ﹤0.01% |
63,431
| – | – |
|
958
DigitalOcean
DOCN
$15.6B
| $850K | ﹤0.01% |
24,889
-14,396
| -37% | -$456K |
|
|
BWIN
959
Baldwin Insurance Group
BWIN
$2.99B
| $848K | ﹤0.01% |
+30,044
| New | +$1.04M |
|
960
State Street SPDR S&P International Small Cap ETF
GWX
$928M
| $845K | ﹤0.01% |
21,028
-85
| -0.4% | -$3.29K |
|
961
MP Materials
MP
$9.91B
| $845K | ﹤0.01% |
12,593
+5,719
| +83% | +$360K |
|
962
State Street Real Estate Select Sector SPDR ETF
XLRE
$8.68B
| $844K | ﹤0.01% |
20,042
+2,749
| +16% | +$115K |
|
963
HP
HPQ
$28.6B
| $844K | ﹤0.01% |
30,998
-109,654
| -78% | -$2.92M |
|
964
Impact Shares NAACP Minority Empowerment ETF
NACP
$77.7M
| $840K | ﹤0.01% |
17,626
+1,206
| +7% | +$54.3K |
|
965
Krystal Biotech
KRYS
$9.72B
| $839K | ﹤0.01% |
4,752
-100
| -2% | -$15K |
|
966
Vital Farms
VITL
$498M
| $839K | ﹤0.01% |
20,383
-3,067
| -13% | -$133K |
|
967
Citizens Financial Group
CFG
$31.2B
| $837K | ﹤0.01% |
15,749
+338
| +2% | +$16.8K |
|
968
Center Bancorp
CNOB
$1.81B
| $833K | ﹤0.01% |
33,570
| – | – |
|
969
Vanguard FTSE All-World ex-US Small-Cap Index Fund
VSS
$12B
| $830K | ﹤0.01% |
5,820
-545
| -9% | -$75.5K |
|
970
Deutsche Bank
DB
$72.1B
| $824K | ﹤0.01% |
23,266
-11
| -0% | -$375 |
|
971
Zeta Global
ZETA
$7.44B
| $821K | ﹤0.01% |
41,335
-231
| -0.6% | -$4.15K |
|
972
NextNav
NN
$3.29B
| $815K | ﹤0.01% |
57,000
| – | – |
|
973
Lennox International
LII
$14.5B
| $814K | ﹤0.01% |
1,538
-519
| -25% | -$303K |
|
974
Yum China
YUMC
$16.2B
| $808K | ﹤0.01% |
18,825
-2,502
| -12% | -$114K |
|
975
Sun Communities
SUI
$14.6B
| $797K | ﹤0.01% |
6,176
+4
| +0.1% | +$506 |
|
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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.