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
RSI icon
326
Rush Street Interactive
RSI
$2.81B
$10.2M 0.03%
530,602
+10
+0% +$137
EPAM icon
327
EPAM Systems
EPAM
$5.17B
$10.2M 0.03%
17,855
-2,996
-14% -$1.76M
IJR icon
328
iShares Core S&P Small-Cap ETF
IJR
$112B
$10.2M 0.03%
92,970
-3,684
-4% -$406K
PM icon
329
Philip Morris
PM
$290B
$10.1M 0.03%
107,062
+5,750
+6% +$578K
FIS icon
330
Fidelity National Information Services
FIS
$21.6B
$10M 0.03%
82,448
-4,510
-5% -$605K
J icon
331
Jacobs Solutions
J
$17B
$10M 0.03%
91,449
+11,224
+14% +$1.24M
ARCC icon
332
Ares Capital
ARCC
$14.3B
$9.75M 0.03%
479,391
+4,700
+1% +$94.2K
IWO icon
333
iShares Russell 2000 Growth ETF
IWO
$15B
$9.65M 0.03%
32,869
+629
+2% +$189K
KMI icon
334
Kinder Morgan
KMI
$70.7B
$9.51M 0.03%
568,481
+26,077
+5% +$443K
NTNX icon
335
Nutanix
NTNX
$17.5B
$9.48M 0.03%
251,362
+4,710
+2% +$178K
VCIT icon
336
Vanguard Intermediate-Term Corporate Bond ETF
VCIT
$67.6B
$9.46M 0.03%
100,163
-5,586
-5% -$533K
CI icon
337
Cigna
CI
$73.3B
$9.38M 0.03%
46,872
-591
-1% -$129K
TCMD icon
338
Tactile Systems Technology
TCMD
$555M
$9.33M 0.03%
209,876
+4,344
+2% +$195K
XLNX
339
DELISTED
Xilinx Inc
XLNX
$9.28M 0.03%
61,461
+1,335
+2% +$196K
VYM icon
340
Vanguard High Dividend Yield ETF
VYM
$84B
$9.21M 0.03%
89,069
+25,019
+39% +$2.64M
IVOL icon
341
Quadratic Interest Rate Volatility and Inflation Hedge ETF
IVOL
$270M
$9.13M 0.03%
327,661
+47,295
+17% +$1.32M
BN icon
342
Brookfield
BN
$110B
$9.08M 0.03%
247,667
+11,399
+5% +$333K
MMP
343
DELISTED
Magellan Midstream Partners, L.P.
MMP
$9.03M 0.03%
198,000
+15,876
+9% +$755K
SBAC icon
344
SBA Communications
SBAC
$19.4B
$8.99M 0.03%
27,188
-430
-2% -$149K
XLC icon
345
State Street Communication Services Select Sector SPDR ETF
XLC
$22.3B
$8.96M 0.03%
111,876
+1,340
+1% +$111K
ENS icon
346
EnerSys
ENS
$6.81B
$8.94M 0.03%
120,034
-6,106
-5% -$542K
MSP
347
DELISTED
Datto Holding Corp.
MSP
$8.93M 0.03%
373,807
+224,097
+150% +$5.8M
NSC icon
348
Norfolk Southern
NSC
$75.3B
$8.73M 0.03%
36,510
+1,623
+5% +$416K
LMT icon
349
Lockheed Martin
LMT
$140B
$8.7M 0.03%
25,204
-241
-0.9% -$87.2K
ADPT icon
350
Adaptive Biotechnologies
ADPT
$4.02B
$8.61M 0.03%
253,243
-25,716
-9% -$930K
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 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.