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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
HCSG icon
401
Healthcare Services Group
HCSG
$1.43B
$6.62M 0.02%
264,847
+4,818
+2% +$130K
CB icon
402
Chubb
CB
$132B
$6.57M 0.02%
37,876
-294
-0.8% -$51.5K
DD icon
403
DuPont de Nemours
DD
$19.5B
$6.45M 0.02%
75,532
+4,684
+7% +$434K
GM icon
404
General Motors
GM
$76.1B
$6.44M 0.02%
122,236
-9,908
-7% -$527K
STZ icon
405
Constellation Brands
STZ
$22.9B
$6.44M 0.02%
30,572
-452
-1% -$98.7K
BP icon
406
BP
BP
$111B
$6.41M 0.02%
234,680
+6,337
+3% +$159K
MGK icon
407
Vanguard Morningstar Mega Cap Growth ETF
MGK
$33.7B
$6.38M 0.02%
135,855
+215
+0.2% +$10.4K
BKNG icon
408
Booking.com
BKNG
$159B
$6.38M 0.02%
67,175
-175
-0.3% -$15.7K
RHI icon
409
Robert Half
RHI
$4.25B
$6.37M 0.02%
63,474
+66
+0.1% +$6.46K
VB icon
410
Vanguard Morningstar Small-Cap ETF
VB
$83B
$6.33M 0.02%
28,936
+351
+1% +$78K
CRL icon
411
Charles River Laboratories
CRL
$13.6B
$6.29M 0.02%
15,236
+116
+0.8% +$48.2K
JBHT icon
412
JB Hunt Transport Services
JBHT
$25.9B
$6.23M 0.02%
37,278
-115
-0.3% -$19.6K
ADI icon
413
Analog Devices
ADI
$187B
$6.21M 0.02%
37,099
+14,125
+61% +$2.37M
ADSK icon
414
Autodesk
ADSK
$52.7B
$6.21M 0.02%
21,782
+1,421
+7% +$435K
TTWO icon
415
Take-Two Interactive
TTWO
$45.4B
$6.21M 0.02%
40,310
+951
+2% +$154K
WPM icon
416
Wheaton Precious Metals
WPM
$61.3B
$6.19M 0.02%
164,665
+10,393
+7% +$453K
NOC icon
417
Northrop Grumman
NOC
$82B
$6.19M 0.02%
17,176
+298
+2% +$108K
BSV icon
418
Vanguard Short-Term Bond ETF
BSV
$45.6B
$6.15M 0.02%
75,041
-700
-0.9% -$57.5K
ABB
419
DELISTED
ABB Ltd
ABB
$6.12M 0.02%
183,317
+3,940
+2% +$143K
IWR icon
420
iShares Russell Mid-Cap ETF
IWR
$57.9B
$6.11M 0.02%
78,087
-1,174
-1% -$94K
GOGO icon
421
Gogo Inc
GOGO
$383M
$6.11M 0.02%
352,895
+55,066
+18% +$667K
AYX
422
DELISTED
Alteryx Inc
AYX
$6.11M 0.02%
83,511
-30,354
-27% -$2.28M
ASAN icon
423
Asana
ASAN
$2.07B
$6.06M 0.02%
58,355
-800
-1% -$66.4K
CDW icon
424
CDW
CDW
$17.1B
$5.99M 0.02%
32,897
+587
+2% +$111K
ODFL icon
425
Old Dominion Freight Line
ODFL
$44.1B
$5.95M 0.02%
41,636
-482
-1% -$66.9K
15 16
17
18 19

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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.