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
MDYV icon
1426
State Street SPDR S&P 400 Mid Cap Value ETF
MDYV
$2.88B
$220K ﹤0.01%
2,641
-245
-8% -$20.2K
UGI icon
1427
UGI
UGI
$7.55B
$220K ﹤0.01%
6,616
+213
+3% +$7.45K
BXC icon
1428
BlueLinx
BXC
$706M
$219K ﹤0.01%
3,000
– –
INDB icon
1429
Independent Bank
INDB
$4.06B
$218K ﹤0.01%
+3,157
New +$215K
ROBO icon
1430
ROBO Global Robotics & Automation Index ETF
ROBO
$2.12B
$218K ﹤0.01%
3,322
-252
-7% -$15.9K
SYLD icon
1431
Cambria Shareholder Yield ETF
SYLD
$1.02B
$218K ﹤0.01%
+3,172
New +$215K
WCC
1432
WESCO International
WCC
$17.7B
$217K ﹤0.01%
+1,028
New +$216K
SGDM icon
1433
Sprott Gold Miners ETF
SGDM
$651M
$217K ﹤0.01%
+3,500
New +$178K
PCT icon
1434
PureCycle Technologies
PCT
$1.42B
$217K ﹤0.01%
16,471
– –
GNR icon
1435
State Street SPDR S&P Global Natural Resources ETF
GNR
$4.9B
$216K ﹤0.01%
3,650
-991
-21% -$56.3K
ANF icon
1436
Abercrombie & Fitch
ANF
$4.84B
$215K ﹤0.01%
2,508
+9
+0.4% +$840
BMRN icon
1437
BioMarin Pharmaceuticals
BMRN
$13.3B
$214K ﹤0.01%
3,957
-1,275
-24% -$72.9K
USFD icon
1438
US Foods
USFD
$23.9B
$214K ﹤0.01%
+2,792
New +$222K
FBNC icon
1439
First Bancorp
FBNC
$2.72B
$214K ﹤0.01%
+4,042
New +$207K
DPZ icon
1440
Domino's
DPZ
$11.5B
$213K ﹤0.01%
494
+23
+5% +$10.4K
USIG icon
1441
iShares Broad USD Investment Grade Corporate Bond ETF
USIG
$17.4B
$212K ﹤0.01%
4,059
-26
-0.6% -$1.34K
CUBE icon
1442
CubeSmart
CUBE
$9.4B
$212K ﹤0.01%
+5,203
New +$212K
EWT icon
1443
iShares MSCI Taiwan ETF
EWT
$11.6B
$212K ﹤0.01%
3,325
-25
-0.7% -$1.5K
LAD icon
1444
Lithia Motors
LAD
$8.29B
$211K ﹤0.01%
668
+7
+1% +$2.26K
VRIG icon
1445
Invesco Variable Rate Investment Grade ETF
VRIG
$1.85B
$211K ﹤0.01%
8,395
-495
-6% -$12.4K
BOH icon
1446
Bank of Hawaii
BOH
$3.15B
$211K ﹤0.01%
3,209
+1
+0% +$67
XVV icon
1447
iShares ESG Screened S&P 500 ETF
XVV
$682M
$210K ﹤0.01%
4,073
– –
EXR icon
1448
Extra Space Storage
EXR
$31.4B
$209K ﹤0.01%
1,485
-1,083
-42% -$156K
SNY icon
1449
Sanofi
SNY
$105B
$209K ﹤0.01%
+4,429
New +$214K
IESC icon
1450
IES Holdings
IESC
$15B
$209K ﹤0.01%
+525
New +$181K
56 57
58
59 60

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
Newport Trust Company
Newport Trust Company Washington, District of Columbia $40.7B AUM 24.62% 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.