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
+1.99%
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
$29.4B
AUM Growth
+$519M
Cap. Flow
+$281M
Cap. Flow %
0.96%
Top 10 Hldgs %
23.58%
Holding
1,987
New
99
Increased
752
Reduced
666
Closed
108

Top Buys

Rank Stock Value
1
ABNB icon
Airbnb
ABNB
+$45.2M
2
CHWY icon
Chewy
CHWY
+$31.5M
3
U icon
Unity
U
+$23.3M
4
RYAN icon
Ryan Specialty Holdings
RYAN
+$22.4M
5
AMZN icon
Amazon
AMZN
+$21.5M

Top Sells

Rank Stock Value
1
IDXX icon
Idexx Laboratories
IDXX
+$37.7M
2
GD icon
General Dynamics
GD
+$33.5M
3
ECL icon
Ecolab
ECL
+$31.7M
4
JNJ icon
Johnson & Johnson
JNJ
+$20.9M
5
UBER icon
Uber
UBER
+$19.2M

Sector Composition

Rank Sector Weight
1 Technology 26.19%
2 Healthcare 19.81%
3 Financials 11.61%
4 Consumer Discretionary 10.68%
5 Industrials 9.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
PRFT
301
DELISTED
Perficient Inc
PRFT
$11.9M 0.04%
102,934
-4,214
-4% -$433K
PH icon
302
Parker-Hannifin
PH
$135B
$11.9M 0.04%
42,461
-1,360
-3% -$405K
NKTR icon
303
Nektar Therapeutics
NKTR
$2.57B
$11.6M 0.04%
42,898
+16,185
+61% +$3.89M
XLI icon
304
State Street Industrial Select Sector SPDR ETF
XLI
$34.7B
$11.5M 0.04%
117,404
+376
+0.3% +$38.6K
IRM icon
305
Iron Mountain
IRM
$37B
$11.5M 0.04%
264,208
+8,989
+4% +$405K
XBI icon
306
State Street SPDR S&P Biotech ETF
XBI
$10.5B
$11.5M 0.04%
91,189
+4,639
+5% +$597K
PAVE icon
307
Global X US Infrastructure Development ETF
PAVE
$14.3B
$11.2M 0.04%
442,361
+2,871
+0.7% +$75.7K
VXF icon
308
Vanguard Extended Market ETF
VXF
$32.1B
$11.2M 0.04%
61,530
+316
+0.5% +$59K
KMB icon
309
Kimberly-Clark
KMB
$36.2B
$11.2M 0.04%
84,635
+142
+0.2% +$19.3K
VMI icon
310
Valmont Industries
VMI
$9.52B
$11.1M 0.04%
47,185
+6,031
+15% +$1.43M
EPD icon
311
Enterprise Products Partners
EPD
$81.9B
$11M 0.04%
510,063
-2,235
-0.4% -$50.8K
TJX icon
312
TJX Companies
TJX
$169B
$10.9M 0.04%
165,743
+7,559
+5% +$528K
MKL icon
313
Markel Group
MKL
$22.8B
$10.9M 0.04%
9,089
+1,168
+15% +$1.44M
SITE icon
314
SiteOne Landscape Supply
SITE
$4.22B
$10.7M 0.04%
53,885
+3,077
+6% +$582K
FND icon
315
Floor & Decor
FND
$6.32B
$10.7M 0.04%
88,897
-163
-0.2% -$19.4K
XLV icon
316
State Street Health Care Select Sector SPDR ETF
XLV
$44B
$10.7M 0.04%
83,789
+995
+1% +$132K
DUK icon
317
Duke Energy
DUK
$96.3B
$10.7M 0.04%
109,189
+550
+0.5% +$56.9K
CRSP icon
318
CRISPR Therapeutics
CRSP
$5.22B
$10.6M 0.04%
94,821
+7,192
+8% +$903K
VSAT icon
319
Viasat
VSAT
$12B
$10.6M 0.04%
191,927
+129,779
+209% +$6.63M
XYL icon
320
Xylem
XYL
$28.5B
$10.5M 0.04%
84,853
-162
-0.2% -$20.8K
VGT icon
321
Vanguard Information Technology ETF
VGT
$149B
$10.4M 0.04%
207,496
+496
+0.2% +$25.7K
MCO icon
322
Moody's
MCO
$82.8B
$10.4M 0.04%
29,289
+136
+0.5% +$51.2K
IUSG icon
323
iShares Core S&P US Growth ETF
IUSG
$33.7B
$10.4M 0.04%
101,138
-1,476
-1% -$156K
XLK icon
324
State Street Technology Select Sector SPDR ETF
XLK
$124B
$10.3M 0.04%
138,106
+1,302
+1% +$100K
RH icon
325
RH
RH
$3.41B
$10.2M 0.03%
15,313
-914
-6% -$629K
11 12
13
14 15

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 2021 Portfolio in Review

As of Q3 2021, William Blair & Company held 1,987 positions worth $29.4B, up 1.8% from $28.9B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q3 2021 filing shows 99 new, 752 increased, 666 reduced and 108 closed positions. Its largest new stake was Ryan Specialty Holdings: 709,555 shares worth $24M. The largest sale was Idexx Laboratories, an estimated $37.7M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 26% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q3 2021 buy was Ryan Specialty Holdings: 709,555 shares worth $24M.
  • William Blair & Company added most to Airbnb in Q3 2021, an estimated $45.2M increase.
  • William Blair & Company's biggest Q3 2021 reduction was Idexx Laboratories, cutting an estimated $37.7M.
  • William Blair & Company fully exited Slack Technologies, Inc. in Q3 2021, selling an estimated $13.8M.
  • William Blair & Company's ten largest holdings make up 24% of its $29.4B portfolio in Q3 2021.
  • William Blair & Company opened 99 new positions and closed 108 in Q3 2021.
  • William Blair & Company's portfolio value rose 1.8% quarter-over-quarter to $29.4B.

Based on William Blair & Company's 13F filing for Q3 2021, filed 12 Nov 2021.