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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
GKOS icon
726
Glaukos
GKOS
$11B
$1.84M 0.01%
38,267
+10,402
+37% +$577K
CSX icon
727
CSX Corp
CSX
$93.2B
$1.84M 0.01%
61,852
+1,081
+2% +$34.6K
AWK icon
728
American Water Works
AWK
$27.2B
$1.82M 0.01%
10,777
-242
-2% -$42.3K
SPHQ icon
729
Invesco S&P 500 Quality ETF
SPHQ
$20.1B
$1.82M 0.01%
37,501
+2,221
+6% +$111K
MGM icon
730
MGM Resorts International
MGM
$11.1B
$1.82M 0.01%
42,183
+864
+2% +$35.2K
LEG icon
731
Leggett & Platt
LEG
$1.33B
$1.82M 0.01%
40,550
+32,196
+385% +$1.55M
WHR icon
732
Whirlpool
WHR
$2.82B
$1.82M 0.01%
8,918
+260
+3% +$57K
WRK
733
DELISTED
WestRock Company
WRK
$1.82M 0.01%
36,488
+4,869
+15% +$246K
NTAP icon
734
NetApp
NTAP
$40.3B
$1.81M 0.01%
20,127
-2
-0% -$169
WSM icon
735
Williams-Sonoma
WSM
$28.8B
$1.79M 0.01%
20,160
+60
+0.3% +$5.08K
SNOW icon
736
Snowflake
SNOW
$117B
$1.78M 0.01%
5,871
-373
-6% -$106K
CFG icon
737
Citizens Financial Group
CFG
$31.3B
$1.77M 0.01%
37,598
+1,182
+3% +$51.9K
DLTH icon
738
Duluth Holdings
DLTH
$152M
$1.75M 0.01%
128,444
– –
GGT
739
Gabelli Multimedia Trust
GGT
$176M
$1.74M 0.01%
192,867
-5,786
-3% -$55.2K
MOS icon
740
The Mosaic Company
MOS
$6.88B
$1.73M 0.01%
48,531
+10,492
+28% +$336K
HEI.A icon
741
HEICO Corp Class A
HEI.A
$38.1B
$1.73M 0.01%
14,634
-134
-0.9% -$16K
MMSI icon
742
Merit Medical Systems
MMSI
$5.43B
$1.72M 0.01%
23,994
– –
PAYC icon
743
Paycom
PAYC
$9.85B
$1.72M 0.01%
3,472
+175
+5% +$78K
LGTY
744
DELISTED
Logility Supply Chain Solutions, Inc. Common Stock
LGTY
$1.72M 0.01%
72,346
+53,051
+275% +$1.22M
ECOM
745
DELISTED
CHANNELADVISOR CORPORATION
ECOM
$1.72M 0.01%
68,001
+1,000
+1% +$24.7K
VOD icon
746
Vodafone
VOD
$37.4B
$1.71M 0.01%
110,938
-29,990
-21% -$496K
CELL
747
DELISTED
PhenomeX Inc. Common Stock
CELL
$1.7M 0.01%
87,099
-43,555
-33% -$1.66M
TLRY icon
748
Tilray
TLRY
$637M
$1.7M 0.01%
15,045
+1,317
+10% +$181K
MINT icon
749
PIMCO Enhanced Short Maturity Active Exchange-Traded Fund
MINT
$17.1B
$1.68M 0.01%
16,481
-2,362
-13% -$241K
SCHG icon
750
Schwab US Large-Cap Growth ETF
SCHG
$63.1B
$1.68M 0.01%
90,696
+33,520
+59% +$639K
28 29
30
31 32

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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.