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
RPG icon
1101
Invesco S&P 500 Pure Growth ETF
RPG
$2.09B
$522K ﹤0.01%
10,933
-685
-6% -$32.1K
VNT icon
1102
Vontier
VNT
$4.47B
$521K ﹤0.01%
12,416
-508
-4% -$20.9K
ATR icon
1103
AptarGroup
ATR
$8.43B
$518K ﹤0.01%
3,873
+223
+6% +$32.2K
FDL icon
1104
First Trust Morningstar Dividend Leaders Index Fund
FDL
$7.98B
$518K ﹤0.01%
11,922
+4,668
+64% +$202K
COHR icon
1105
Coherent
COHR
$64B
$517K ﹤0.01%
4,800
+26
+0.5% +$2.59K
NGG icon
1106
National Grid
NGG
$81.6B
$516K ﹤0.01%
7,209
-256
-3% -$18K
GEW
1107
Cambria Global EW ETF
GEW
$146M
$516K ﹤0.01%
+10,250
New +$513K
RMBS icon
1108
Rambus
RMBS
$10.8B
$511K ﹤0.01%
4,900
+360
+8% +$27.8K
MTDR icon
1109
Matador Resources
MTDR
$6.39B
$510K ﹤0.01%
11,359
+2,228
+24% +$109K
BHC icon
1110
Bausch Health
BHC
$2.37B
$508K ﹤0.01%
78,777
-2,470
-3% -$16.9K
LITE icon
1111
Lumentum
LITE
$78B
$508K ﹤0.01%
3,120
– –
EVRG icon
1112
Evergy
EVRG
$19.3B
$505K ﹤0.01%
6,640
-2,186
-25% -$156K
ICLN icon
1113
iShares Global Clean Energy ETF
ICLN
$2.11B
$505K ﹤0.01%
32,602
+14,277
+78% +$202K
BOOT icon
1114
Boot Barn
BOOT
$4.92B
$504K ﹤0.01%
3,044
– –
ALB icon
1115
Albemarle
ALB
$15.4B
$504K ﹤0.01%
6,214
+2,764
+80% +$213K
MDYG icon
1116
State Street SPDR S&P 400 Mid Cap Growth ETF
MDYG
$2.97B
$502K ﹤0.01%
5,484
+9
+0.2% +$809
PKG icon
1117
Packaging Corp of America
PKG
$22.9B
$501K ﹤0.01%
2,300
+213
+10% +$43.9K
HBNC icon
1118
Horizon Bancorp
HBNC
$1.05B
$500K ﹤0.01%
31,200
– –
ONEQ icon
1119
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.9B
$499K ﹤0.01%
5,594
-39
-0.7% -$3.29K
NDEC
1120
Innovator Growth-100 Power Buffer ETF - December
NDEC
$62.5M
$498K ﹤0.01%
18,411
– –
TPR icon
1121
Tapestry
TPR
$25.9B
$491K ﹤0.01%
4,338
-352
-8% -$36.8K
PNR icon
1122
Pentair
PNR
$10.7B
$490K ﹤0.01%
4,427
+1,416
+47% +$151K
APLD icon
1123
Applied Digital
APLD
$8.81B
$489K ﹤0.01%
21,328
-116,835
-85% -$1.73M
PRVA icon
1124
Privia Health
PRVA
$2.78B
$488K ﹤0.01%
19,599
-40
-0.2% -$861
GSHD icon
1125
Goosehead Insurance
GSHD
$2.39B
$484K ﹤0.01%
6,508
-2,935
-31% -$259K
43 44
45
46 47

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 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
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 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.