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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
HELE icon
976
Helen of Troy
HELE
$699M
$852K ﹤0.01%
3,794
+110
+3% +$25.2K
FLOT icon
977
iShares Floating Rate Bond ETF
FLOT
$10.5B
$850K ﹤0.01%
16,723
+2,500
+18% +$127K
ANSS
978
DELISTED
Ansys
ANSS
$848K ﹤0.01%
2,492
-13
-0.5% -$4.7K
IEI icon
979
iShares 3-7 Year Treasury Bond ETF
IEI
$17.7B
$848K ﹤0.01%
6,514
-97
-1% -$12.7K
TDY icon
980
Teledyne Technologies
TDY
$31.2B
$848K ﹤0.01%
1,974
-192
-9% -$84.8K
MSCI icon
981
MSCI
MSCI
$41.8B
$847K ﹤0.01%
1,392
-90
-6% -$55K
AFL icon
982
Aflac
AFL
$60.7B
$844K ﹤0.01%
16,189
-387
-2% -$21.2K
DGRO icon
983
iShares Core Dividend Growth ETF
DGRO
$43.9B
$837K ﹤0.01%
16,666
+1,091
+7% +$56.5K
CTXS
984
DELISTED
Citrix Systems Inc
CTXS
$837K ﹤0.01%
7,795
+70
+0.9% +$7.56K
EB
985
DELISTED
Eventbrite
EB
$836K ﹤0.01%
44,225
-23,995
-35% -$421K
ZROZ icon
986
PIMCO 25+ Year Zero Coupon US Treasury Index Exchange-Traded Fund
ZROZ
$1.31B
$836K ﹤0.01%
5,742
-699
-11% -$106K
WAL icon
987
Western Alliance Bancorporation
WAL
$8.92B
$827K ﹤0.01%
7,601
+4
+0.1% +$389
CBRE icon
988
CBRE Group
CBRE
$44B
$826K ﹤0.01%
8,488
– –
FITB
989
Fifth Third Bancorp
FITB
$52.5B
$825K ﹤0.01%
19,440
-1,415
-7% -$54.2K
SWIM icon
990
Latham Group
SWIM
$889M
$825K ﹤0.01%
50,287
+40,489
+413% +$944K
PZA icon
991
Invesco National AMT-Free Municipal Bond ETF
PZA
$4.27B
$823K ﹤0.01%
30,628
-43
-0.1% -$1.17K
HALO icon
992
Halozyme
HALO
$11.4B
$822K ﹤0.01%
20,217
+765
+4% +$32K
GWX icon
993
State Street SPDR S&P International Small Cap ETF
GWX
$928M
$820K ﹤0.01%
21,307
– –
BMO icon
994
Bank of Montreal
BMO
$129B
$819K ﹤0.01%
8,214
+4,386
+115% +$442K
RNTX
995
Rein Therapeutics
RNTX
$67.4M
$819K ﹤0.01%
40,158
+5,756
+17% +$126K
OSK icon
996
Oshkosh
OSK
$9.41B
$810K ﹤0.01%
7,912
-63
-0.8% -$7.24K
RVLV icon
997
Revolve Group
RVLV
$1.72B
$808K ﹤0.01%
13,077
+2,737
+26% +$178K
VVNT
998
DELISTED
Vivint Smart Home, Inc. Class A Common Stock
VVNT
$805K ﹤0.01%
85,137
-34,900
-29% -$417K
SIX
999
DELISTED
Six Flags Entertainment Corp.
SIX
$802K ﹤0.01%
18,863
-8,770
-32% -$364K
FOXF icon
1000
Fox Factory Holding Corp
FOXF
$886M
$801K ﹤0.01%
5,541
+184
+3% +$28.3K
38 39
40
41 42

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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.