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
VRT icon
326
Vertiv
VRT
$111B
$11.7M 0.03%
77,787
+34,528
+80% +$4.61M
KFY icon
327
Korn Ferry
KFY
$4.28B
$11.7M 0.03%
166,798
-4,033
-2% -$294K
YETI icon
328
Yeti Holdings
YETI
$3.85B
$11.5M 0.03%
346,692
-32,166
-8% -$1.12M
EFV icon
329
iShares MSCI EAFE Value ETF
EFV
$30.1B
$11.5M 0.03%
169,517
+4,553
+3% +$300K
TEL icon
330
TE Connectivity
TEL
$62B
$11.4M 0.03%
52,079
-289
-0.6% -$57.9K
SMG icon
331
ScottsMiracle-Gro
SMG
$3.62B
$11.4M 0.03%
200,293
-42,761
-18% -$2.7M
EXEL icon
332
Exelixis
EXEL
$12.5B
$11.4M 0.03%
276,126
+1,546
+0.6% +$62.1K
NKE icon
333
Nike
NKE
$60.1B
$11.3M 0.03%
162,597
-842
-0.5% -$62.8K
GCMG icon
334
GCM Grosvenor
GCMG
$2.82B
$11.3M 0.03%
937,069
+97,863
+12% +$1.21M
PNC icon
335
PNC Financial Services
PNC
$102B
$11.3M 0.03%
56,166
+6,015
+12% +$1.19M
BSX icon
336
Boston Scientific
BSX
$74.5B
$11.2M 0.03%
115,178
-3,590
-3% -$372K
VXUS icon
337
Vanguard Total International Stock ETF
VXUS
$164B
$11.2M 0.03%
152,557
+128,034
+522% +$9.09M
IJUL icon
338
Innovator International Developed Power Buffer ETF July
IJUL
$258M
$11.1M 0.03%
341,024
+190,749
+127% +$6.14M
IRT icon
339
Independence Realty Trust
IRT
$3.96B
$11.1M 0.03%
675,245
-13,740
-2% -$238K
ADI icon
340
Analog Devices
ADI
$187B
$10.9M 0.03%
44,421
+4,357
+11% +$1.05M
VBR icon
341
Vanguard Morningstar Small-Cap Value ETF
VBR
$38.1B
$10.9M 0.03%
52,221
+663
+1% +$136K
MCK icon
342
McKesson
MCK
$102B
$10.9M 0.03%
14,057
+1,565
+13% +$1.1M
VRRM icon
343
Verra Mobility
VRRM
$714M
$10.8M 0.03%
437,155
-134,174
-23% -$3.32M
VPU
344
Vanguard Utilities ETF
VPU
$8.48B
$10.8M 0.03%
56,974
-551
-1% -$101K
PAVE icon
345
Global X US Infrastructure Development ETF
PAVE
$14.3B
$10.7M 0.03%
225,265
+5,825
+3% +$268K
MGK icon
346
Vanguard Morningstar Mega Cap Growth ETF
MGK
$33.7B
$10.7M 0.03%
133,185
-9,675
-7% -$743K
PLNT icon
347
Planet Fitness
PLNT
$3.65B
$10.6M 0.03%
101,756
-56,135
-36% -$5.97M
BAH icon
348
Booz Allen Hamilton
BAH
$9.43B
$10.5M 0.03%
104,967
-1,302
-1% -$139K
OKE icon
349
Oneok
OKE
$58.3B
$10.5M 0.03%
143,426
-8,598
-6% -$658K
SN icon
350
SharkNinja
SN
$26.2B
$10.4M 0.03%
101,231
+21,339
+27% +$2.44M
12 13
14
15 16

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
Grantham, Mayo, Van Otterloo & Co (GMO)
Grantham, Mayo, Van Otterloo & Co (GMO) Boston, Massachusetts $39.1B AUM 28.69% 1-Year Est. Return
HF
HRT Financial New York $40.1B AUM 58.22% 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.