We are live on ! Find out more
William Blair & Company

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
Cap. Flow
-$160M
Cap. Flow %
-0.43%
Top 10 Hldgs %
26.02%
Holding
1,919
New
98
Increased
697
Reduced
774
Closed
75

Top Buys

Rank Stock Value
1
META icon
Meta Platforms (Facebook)
META
+$76.1M
2
APP icon
Applovin
APP
+$75.3M
3
NOW icon
ServiceNow
NOW
+$66.6M
4
CWAN
Clearwater Analytics
CWAN
+$65.8M
5
FANG icon
Diamondback Energy
FANG
+$30.7M

Top Sells

Rank Stock Value
1
CYBR
CyberArk
CYBR
+$70.7M
2
ADBE icon
Adobe
ADBE
+$61.7M
3
MSFT icon
Microsoft
MSFT
+$45.7M
4
WDAY icon
Workday
WDAY
+$42.6M
5
POOL icon
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
CDRO icon
1476
Codere Online
CDRO
$410M
$186K ﹤0.01%
26,942
-13,760
-34% -$111K
NUS icon
1477
Nu Skin
NUS
$236M
$185K ﹤0.01%
+15,141
New +$159K
RSPF icon
1478
Invesco S&P 500 Equal Weight Financials ETF
RSPF
$309M
$183K ﹤0.01%
2,350
– –
RPAY icon
1479
Repay Holdings
RPAY
$311M
$181K ﹤0.01%
34,635
– –
IXC icon
1480
iShares Global Energy ETF
IXC
$2.74B
$181K ﹤0.01%
4,327
– –
VOX icon
1481
Vanguard Communication Services ETF
VOX
$5.78B
$180K ﹤0.01%
958
-894
-48% -$160K
EVEX icon
1482
Eve Holding
EVEX
$948M
$179K ﹤0.01%
47,017
– –
VMBS icon
1483
Vanguard Mortgage-Backed Securities ETF
VMBS
$15.6B
$175K ﹤0.01%
3,730
-1,281
-26% -$59.5K
RGT
1484
Royce Global Value Trust
RGT
$101M
$175K ﹤0.01%
13,520
– –
GMF icon
1485
State Street SPDR S&P Emerging Asia Pacific ETF
GMF
$440M
$174K ﹤0.01%
1,255
– –
IEV icon
1486
iShares Europe ETF
IEV
$1.7B
$172K ﹤0.01%
2,622
– –
NEPH icon
1487
Nephros
NEPH
$47.4M
$171K ﹤0.01%
36,249
– –
UPRO icon
1488
ProShares UltraPro S&P 500
UPRO
$5.74B
$170K ﹤0.01%
1,522
– –
IGIB icon
1489
iShares 5-10 Year Investment Grade Corporate Bond ETF
IGIB
$18.5B
$169K ﹤0.01%
3,132
+883
+39% +$47.2K
FXI icon
1490
iShares China Large-Cap ETF
FXI
$4.2B
$169K ﹤0.01%
4,114
+58
+1% +$2.24K
IYE icon
1491
iShares US Energy ETF
IYE
$1.8B
$169K ﹤0.01%
3,546
-35
-1% -$1.63K
RPV icon
1492
Invesco S&P 500 Pure Value ETF
RPV
$1.73B
$167K ﹤0.01%
1,683
-23
-1% -$2.2K
KOS icon
1493
Kosmos Energy
KOS
$1.49B
$166K ﹤0.01%
100,000
– –
WU icon
1494
Western Union
WU
$2.23B
$164K ﹤0.01%
20,504
-8,152
-28% -$68.2K
BMAY icon
1495
Innovator US Equity Buffer ETF May
BMAY
$237M
$162K ﹤0.01%
3,708
-3,362
-48% -$145K
GO icon
1496
Grocery Outlet
GO
$1.01B
$161K ﹤0.01%
10,000
– –
GALT icon
1497
Galectin Therapeutics
GALT
$317M
$160K ﹤0.01%
37,884
– –
VRP icon
1498
Invesco Variable Rate Preferred ETF
VRP
$3.01B
$160K ﹤0.01%
6,485
– –
IMCV icon
1499
iShares Morningstar Mid-Cap Value ETF
IMCV
$1.16B
$156K ﹤0.01%
+1,944
New +$153K
VMD icon
1500
Viemed Healthcare
VMD
$353M
$156K ﹤0.01%
23,000
– –
58 59
60
61 62

Similar funds

Parallax Volatility Advisers
Parallax Volatility Advisers San Francisco, California $38.6B AUM 45.89% 1-Year Est. Return
Credit Agricole
Credit Agricole Montrouge Cedex, France $38.1B AUM
Carson Wealth (CWM LLC)
Carson Wealth (CWM LLC) Omaha, Nebraska $38.1B AUM 19.66% 1-Year Est. Return
Nomura Asset Management
Nomura Asset Management Tokyo, Japan $38.8B AUM 30.94% 1-Year Est. Return
Nomura Holdings
Nomura Holdings Tokyo, Japan $37.7B AUM 34.44% 1-Year Est. Return
Fayez Sarofim & Co
Fayez Sarofim & Co Houston, Texas $39.1B AUM 15.14% 1-Year Est. Return
HF
HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return
First Manhattan
First Manhattan New York $36.1B AUM 11.5% 1-Year Est. Return

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.