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William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $33.3B
1-Year Est. Return 44.76%
This Fund
S&P 500
This Quarter Est. Return
+5.73%
1 Year Est. Return
+44.76%
3 Year Est. Return
+140.8%
5 Year Est. Return
+166.51%
10 Year Est. Return
+978.6%
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
AMED
101
DELISTED
Amedisys
AMED
$121M 0.33%
749,268
-14,380
-2% -$2.31M
MKSI icon
102
MKS Inc
MKSI
$21B
$121M 0.33%
692,650
+571,074
+470% +$89.3M
WIX icon
103
WIX.com
WIX
$2.78B
$120M 0.32%
760,620
+171,566
+29% +$29.7M
INMD icon
104
InMode
INMD
$867M
$117M 0.32%
1,653,921
-24,867
-1% -$1.99M
HEI.A icon
105
HEICO Corp Class A
HEI.A
$37B
$115M 0.31%
896,802
-17,807
-2% -$2.27M
EFX icon
106
Equifax
EFX
$21.3B
$115M 0.31%
393,252
+74,613
+23% +$20.8M
NFE icon
107
New Fortress Energy
NFE
$95.3M
$114M 0.31%
4,714,370
+836,467
+22% +$23.2M
PACB icon
108
Pacific Biosciences
PACB
$357M
$112M 0.3%
5,469,636
+1,374,633
+34% +$33.2M
HELE icon
109
Helen of Troy
HELE
$680M
$111M 0.3%
455,407
-330,882
-42% -$78.5M
GTLS
110
DELISTED
Chart Industries
GTLS
$111M 0.3%
696,915
+72,165
+12% +$12.8M
META icon
111
Meta Platforms (Facebook)
META
$1.53T
$107M 0.29%
316,994
+41,983
+15% +$13.9M
LRCX icon
112
Lam Research
LRCX
$407B
$106M 0.29%
1,479,120
+344,860
+30% +$21.6M
STEM icon
113
Stem
STEM
$53.3M
$106M 0.29%
280,176
+30,214
+12% +$13.1M
CSGP icon
114
CoStar Group
CSGP
$12.6B
$98.3M 0.27%
1,243,453
+383,552
+45% +$32.2M
DLO icon
115
dLocal
DLO
$4.15B
$96.2M 0.26%
2,695,136
+1,396,194
+107% +$60.4M
ACH
116
Accendra Health
ACH
$98.4M
$90.9M 0.25%
2,089,146
-71,146
-3% -$2.79M
TMO icon
117
Thermo Fisher Scientific
TMO
$221B
$86.8M 0.23%
130,153
+16,082
+14% +$10M
FTV icon
118
Fortive
FTV
$18.6B
$85.2M 0.23%
1,482,086
+236,682
+19% +$13.4M
IDXX icon
119
Idexx Laboratories
IDXX
$45.5B
$81.6M 0.22%
123,988
+2,201
+2% +$1.38M
APTV icon
120
Aptiv
APTV
$10.3B
$81M 0.22%
491,022
-59,355
-11% -$9.9M
WDAY icon
121
Workday
WDAY
$44B
$80.9M 0.22%
296,213
+26,111
+10% +$7.25M
PACW
122
DELISTED
PacWest Bancorp
PACW
$77.8M 0.21%
1,722,187
+434,377
+34% +$20.2M
AIN icon
123
Albany International
AIN
$1.81B
$76.5M 0.21%
865,174
-39,907
-4% -$3.36M
UNP icon
124
Union Pacific
UNP
$174B
$75.4M 0.2%
299,309
+39,404
+15% +$9.33M
SKY icon
125
Champion Homes
SKY
$5.11B
$73M 0.2%
924,389
-380,025
-29% -$27.4M
3 4
5
6 7

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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.