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William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $30.3B
1-Year Est. Return 33.75%
This Fund
S&P 500
This Quarter Est. Return
+5.73%
1 Year Est. Return
+33.75%
3 Year Est. Return
+108.55%
5 Year Est. Return
+126.9%
10 Year Est. Return
+788.31%
AUM
$37B
AUM Growth
+$1.55B
Cap. Flow
+$474M
Cap. Flow %
1.28%
Top 10 Hldgs %
16.63%
Holding
465
New
34
Increased
192
Reduced
193
Closed
38

Top Buys

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$206M
2
AMZN icon
Amazon
AMZN
+$159M
3
NFLX icon
Netflix
NFLX
+$145M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$127M
5
SKIN icon
SkinHealth Systems
SKIN
+$113M

Top Sells

Rank Stock Value
1
PODD icon
Insulet
PODD
+$218M
2
EHC icon
Encompass Health
EHC
+$200M
3
FCFS icon
FirstCash
FCFS
+$170M
4
GDDY icon
GoDaddy
GDDY
+$167M
5
ZEN
ZENDESK INC
ZEN
+$156M

Sector Composition

Rank Sector Weight
1 Technology 26.95%
2 Healthcare 17.95%
3 Consumer Discretionary 15.98%
4 Industrials 14.09%
5 Financials 7.71%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TSM icon
1
TSMC
TSM
$2.17T
$1.36B 3.68%
11,311,005
+298,322
+3% +$34.9M
MSFT icon
2
Microsoft
MSFT
$3.71T
$847M 2.29%
2,518,671
+636,404
+34% +$206M
BLDR icon
3
Builders FirstSource
BLDR
$7.8B
$623M 1.68%
7,273,129
-1,218,487
-14% -$82.5M
AMZN icon
4
Amazon
AMZN
$2.94T
$564M 1.53%
3,385,400
+931,480
+38% +$159M
GOOGL icon
5
Alphabet (Google) Class A
GOOGL
$4.38T
$554M 1.5%
3,825,700
+884,120
+30% +$127M
P
6
Everpure Inc
P
$29B
$478M 1.29%
14,687,219
-771,563
-5% -$22.4M
MELI icon
7
Mercado Libre
MELI
$92.8B
$468M 1.26%
346,884
+46,508
+15% +$65.3M
CNI icon
8
Canadian National Railway
CNI
$76.5B
$439M 1.19%
3,568,974
-45,375
-1% -$5.75M
TREX icon
9
Trex
TREX
$4.93B
$416M 1.13%
3,083,801
-69,667
-2% -$8.36M
CRL icon
10
Charles River Laboratories
CRL
$12.8B
$406M 1.1%
1,076,250
+133,654
+14% +$51.9M
NICE icon
11
Nice
NICE
$5.69B
$393M 1.06%
1,295,958
-50,075
-4% -$14.5M
AZTA icon
12
Azenta
AZTA
$1.42B
$384M 1.04%
3,720,396
-46,680
-1% -$5.06M
ABMD
13
DELISTED
Abiomed Inc
ABMD
$368M 0.99%
1,023,948
+61,601
+6% +$20.8M
CCK icon
14
Crown Holdings
CCK
$13.2B
$366M 0.99%
3,311,879
-48,563
-1% -$5.16M
WH icon
15
Wyndham Hotels & Resorts
WH
$5.58B
$353M 0.95%
3,940,506
+884,079
+29% +$73.9M
SPY icon
16
State Street SPDR S&P 500 ETF Trust
SPY
$818B
$340M 0.92%
714,950
-120,300
-14% -$55.2M
MA icon
17
Mastercard
MA
$505B
$338M 0.91%
940,013
+123,543
+15% +$42.7M
BWXT icon
18
BWX Technologies
BWXT
$15.3B
$333M 0.9%
6,956,351
-296,807
-4% -$15.5M
BCO icon
19
Brink's
BCO
$4.65B
$333M 0.9%
5,075,816
-59,952
-1% -$3.86M
TEAM icon
20
Atlassian
TEAM
$28B
$330M 0.89%
865,821
+41,840
+5% +$16.8M
GLOB icon
21
Globant
GLOB
$1.61B
$323M 0.87%
1,029,858
+41,171
+4% +$12.2M
DT icon
22
Dynatrace
DT
$14.2B
$322M 0.87%
5,336,843
-280,057
-5% -$19.1M
EEFT icon
23
Euronet Worldwide
EEFT
$2.73B
$322M 0.87%
2,702,498
+187,610
+7% +$22.3M
PEN icon
24
Penumbra
PEN
$12.8B
$316M 0.86%
1,101,554
+419,632
+62% +$111M
BURL icon
25
Burlington
BURL
$23.4B
$311M 0.84%
1,065,602
+319,849
+43% +$89.9M
1
2 3 4 5

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William Blair Investment Management's Q4 2021 Portfolio in Review

As of Q4 2021, William Blair Investment Management held 465 positions worth $37B, up 4.4% from $35.5B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

William Blair Investment Management's Q4 2021 filing shows 34 new, 192 increased, 193 reduced and 38 closed positions. Its largest new stake was Netflix: 2,270,340 shares worth $137M. The largest sale was Insulet, an estimated $218M.

By sector, the portfolio is most concentrated in Technology at 27% of assets, up from 25% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • William Blair Investment Management's largest Q4 2021 buy was Netflix: 2,270,340 shares worth $137M.
  • William Blair Investment Management added most to Microsoft in Q4 2021, an estimated $206M increase.
  • William Blair Investment Management's biggest Q4 2021 reduction was Encompass Health, cutting an estimated $200M.
  • William Blair Investment Management fully exited Insulet in Q4 2021, selling an estimated $218M.
  • William Blair Investment Management's ten largest holdings make up 17% of its $37B portfolio in Q4 2021.
  • William Blair Investment Management opened 34 new positions and closed 38 in Q4 2021.
  • William Blair Investment Management's portfolio value rose 4.4% quarter-over-quarter to $37B.

Based on William Blair Investment Management's 13F filing for Q4 2021, filed 14 Feb 2022.