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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
NOVT icon
826
Novanta
NOVT
$6.33B
$1.27M ﹤0.01%
8,251
– –
RCL icon
827
Royal Caribbean
RCL
$82.9B
$1.27M ﹤0.01%
14,300
-148
-1% -$12K
KAI icon
828
Kadant
KAI
$3.91B
$1.27M ﹤0.01%
+6,218
New +$1.23M
PLTR icon
829
Palantir
PLTR
$430B
$1.27M ﹤0.01%
52,645
-4,592
-8% -$112K
EXC icon
830
Exelon
EXC
$47B
$1.26M ﹤0.01%
36,584
-3,027
-8% -$103K
BCO icon
831
Brink's
BCO
$4.72B
$1.26M ﹤0.01%
19,912
-13
-0.1% -$977
FUSB icon
832
First US Bancshares
FUSB
$90.7M
$1.26M ﹤0.01%
117,677
– –
TIXT
833
DELISTED
TELUS International
TIXT
$1.26M ﹤0.01%
35,955
+19,825
+123% +$642K
IBDM
834
DELISTED
iShares iBonds Dec 2021 Term Corporate ETF
IBDM
$1.26M ﹤0.01%
50,825
-450
-0.9% -$11.1K
URTH icon
835
iShares MSCI World ETF
URTH
$8.4B
$1.26M ﹤0.01%
9,934
-35
-0.4% -$4.54K
LIT icon
836
Global X Lithium & Battery Tech ETF
LIT
$1.6B
$1.25M ﹤0.01%
15,311
-8,384
-35% -$687K
DTE icon
837
DTE Energy
DTE
$29B
$1.25M ﹤0.01%
11,218
-1,860
-14% -$218K
RWT
838
Redwood Trust
RWT
$599M
$1.25M ﹤0.01%
97,048
+17
+0% +$208
RVTY icon
839
Revvity
RVTY
$13.1B
$1.25M ﹤0.01%
7,199
-14
-0.2% -$2.47K
SCHB icon
840
Schwab US Broad Market ETF
SCHB
$45.2B
$1.25M ﹤0.01%
71,910
-8,298
-10% -$148K
IGV icon
841
iShares Expanded Tech-Software Sector ETF
IGV
$15.2B
$1.24M ﹤0.01%
15,585
+175
+1% +$14.3K
SPOK icon
842
Spok Holdings
SPOK
$230M
$1.24M ﹤0.01%
121,485
-36,436
-23% -$327K
FTCS icon
843
First Trust Capital Strength ETF
FTCS
$8.02B
$1.24M ﹤0.01%
16,553
-740
-4% -$57.7K
ZD icon
844
Ziff Davis
ZD
$1.92B
$1.24M ﹤0.01%
10,413
-5,301
-34% -$636K
KSU
845
DELISTED
Kansas City Southern
KSU
$1.24M ﹤0.01%
4,564
+670
+17% +$187K
TTD icon
846
Trade Desk
TTD
$6.84B
$1.23M ﹤0.01%
17,430
+4,375
+34% +$338K
KEYS icon
847
Keysight
KEYS
$60.5B
$1.22M ﹤0.01%
7,447
+1,207
+19% +$203K
CABO icon
848
Cable One
CABO
$206M
$1.22M ﹤0.01%
674
+5
+0.7% +$9.79K
NTLA icon
849
Intellia Therapeutics
NTLA
$1.66B
$1.22M ﹤0.01%
9,110
– –
FVD icon
850
First Trust Value Line Dividend Fund
FVD
$8.4B
$1.22M ﹤0.01%
31,151
+2,425
+8% +$98.4K
32 33
34
35 36

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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.