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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
AZEK
351
DELISTED
The AZEK Co
AZEK
$8.48M 0.03%
232,056
+71,273
+44% +$2.78M
IVW icon
352
iShares S&P 500 Growth ETF
IVW
$77.3B
$8.47M 0.03%
114,582
+7,318
+7% +$558K
MSI icon
353
Motorola Solutions
MSI
$77.7B
$8.37M 0.03%
36,040
+2,430
+7% +$564K
CODI icon
354
Compass Diversified
CODI
$908M
$8.33M 0.03%
295,592
+158,384
+115% +$4.34M
APPF icon
355
AppFolio
APPF
$6.97B
$8.32M 0.03%
69,145
+699
+1% +$90.8K
FDN icon
356
First Trust Dow Jones Internet Index Fund ETF
FDN
$5.38B
$8.29M 0.03%
35,140
+20,945
+148% +$5.12M
CBOE icon
357
Cboe Global Markets
CBOE
$30.4B
$8.26M 0.03%
66,664
-1,250
-2% -$153K
SPTI icon
358
State Street SPDR Portfolio Intermediate Term Treasury ETF
SPTI
$10.6B
$8.24M 0.03%
255,102
-6,639
-3% -$216K
COIN icon
359
Coinbase
COIN
$39.3B
$8.2M 0.03%
36,038
+8,762
+32% +$2.16M
TIG
360
DELISTED
Trean Insurance Group, Inc. Common Stock
TIG
$8.2M 0.03%
792,106
-234,388
-23% -$2.78M
IJH icon
361
iShares Core S&P Mid-Cap ETF
IJH
$128B
$8.13M 0.03%
154,515
+1,395
+0.9% +$75K
GLW icon
362
Corning
GLW
$144B
$8.02M 0.03%
219,809
-950
-0.4% -$37.9K
XLE icon
363
State Street Energy Select Sector SPDR ETF
XLE
$39.9B
$7.91M 0.03%
303,626
-114,918
-27% -$2.85M
SDY icon
364
State Street SPDR S&P Dividend ETF
SDY
$22.1B
$7.88M 0.03%
67,076
-2,283
-3% -$280K
DFS
365
DELISTED
Discover Financial Services
DFS
$7.86M 0.03%
63,957
-3,296
-5% -$413K
GDX icon
366
VanEck Gold Miners ETF
GDX
$27.8B
$7.83M 0.03%
265,702
+8,327
+3% +$271K
LFUS icon
367
Littelfuse
LFUS
$11.7B
$7.79M 0.03%
28,496
-2
-0% -$533
WM icon
368
Waste Management
WM
$90.5B
$7.65M 0.03%
51,242
+1,327
+3% +$199K
WMG icon
369
Warner Music
WMG
$13B
$7.62M 0.03%
178,247
+14,625
+9% +$556K
RF icon
370
Regions Financial
RF
$26.9B
$7.59M 0.03%
356,129
+3,313
+0.9% +$65.9K
PING
371
DELISTED
Ping Identity Holding Corp.
PING
$7.53M 0.03%
306,581
+49,154
+19% +$1.19M
DAVA icon
372
Endava
DAVA
$162M
$7.53M 0.03%
55,414
+10,498
+23% +$1.36M
IWP icon
373
iShares Russell Mid-Cap Growth ETF
IWP
$21B
$7.51M 0.03%
66,982
+1,684
+3% +$194K
BYND icon
374
Beyond Meat
BYND
$214M
$7.46M 0.03%
70,894
+1,823
+3% +$223K
EOG icon
375
EOG Resources
EOG
$75.1B
$7.45M 0.03%
92,787
-4,766
-5% -$347K
13 14
15
16 17

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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.