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
ZBH icon
526
Zimmer Biomet
ZBH
$18.8B
$3.72M 0.01%
26,155
+3,719
+17% +$547K
COUR icon
527
Coursera
COUR
$1.49B
$3.69M 0.01%
116,502
+83,331
+251% +$3.14M
F icon
528
Ford
F
$55.5B
$3.66M 0.01%
258,267
+45,168
+21% +$614K
IGSB icon
529
iShares 1-5 Year Investment Grade Corporate Bond ETF
IGSB
$23.4B
$3.66M 0.01%
66,927
-2,582
-4% -$141K
MSM icon
530
MSC Industrial Direct
MSM
$6.72B
$3.63M 0.01%
45,288
+12,120
+37% +$1.03M
JAMF
531
DELISTED
Jamf
JAMF
$3.63M 0.01%
94,233
+1,311
+1% +$45K
HPE icon
532
Hewlett Packard
HPE
$82.3B
$3.62M 0.01%
254,275
+217,467
+591% +$3.14M
SRPT icon
533
Sarepta Therapeutics
SRPT
$1.97B
$3.59M 0.01%
38,799
+4,401
+13% +$339K
BURL icon
534
Burlington
BURL
$22.2B
$3.56M 0.01%
12,557
-3,249
-21% -$1.04M
ELS icon
535
Equity Lifestyle Properties
ELS
$12.6B
$3.54M 0.01%
45,392
-234
-0.5% -$19.2K
ES icon
536
Eversource Energy
ES
$27.1B
$3.54M 0.01%
43,293
-721
-2% -$62.6K
CP icon
537
Canadian Pacific Kansas City
CP
$82.3B
$3.53M 0.01%
54,280
+35
+0.1% +$2.49K
MXL icon
538
MaxLinear
MXL
$7.05B
$3.52M 0.01%
71,426
-2,858
-4% -$138K
BYSI icon
539
BeyondSpring
BYSI
$32.9M
$3.51M 0.01%
222,705
-207,875
-48% -$3.74M
VCYT icon
540
Veracyte
VCYT
$3.55B
$3.51M 0.01%
75,557
+14,149
+23% +$617K
TMUS icon
541
T-Mobile US
TMUS
$194B
$3.5M 0.01%
27,414
-1,041
-4% -$145K
CGNX icon
542
Cognex
CGNX
$10.4B
$3.5M 0.01%
43,636
-2,375
-5% -$204K
PRO
543
DELISTED
PROS Holdings
PRO
$3.49M 0.01%
98,459
-429
-0.4% -$18K
HACK icon
544
Amplify Cybersecurity ETF
HACK
$3.01B
$3.49M 0.01%
57,359
+2,958
+5% +$185K
TRU icon
545
TransUnion
TRU
$15.2B
$3.47M 0.01%
30,920
+2,852
+10% +$335K
SP
546
DELISTED
SP Plus Corporation
SP
$3.47M 0.01%
113,139
+8,694
+8% +$270K
TMX
547
DELISTED
Terminix Global Holdings, Inc.
TMX
$3.45M 0.01%
82,868
-20,744
-20% -$954K
JJSF icon
548
J&J Snack Foods
JJSF
$1.7B
$3.45M 0.01%
22,561
+1,612
+8% +$262K
RSG icon
549
Republic Services
RSG
$66.3B
$3.43M 0.01%
28,588
+360
+1% +$43.1K
SAIC icon
550
Saic
SAIC
$5.3B
$3.42M 0.01%
40,009
-2,387
-6% -$204K
20 21
22
23 24

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 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.