We are live on ! Find out more
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
LYV icon
26
Live Nation Entertainment
LYV
$42.7B
$304M 0.82%
2,538,257
-556,316
-18% -$60M
TECH icon
27
Bio-Techne
TECH
$11.2B
$302M 0.82%
2,334,116
-281,260
-11% -$34.5M
MLM icon
28
Martin Marietta Materials
MLM
$33.3B
$298M 0.8%
675,613
-173,199
-20% -$70.2M
LULU icon
29
lululemon athletica
LULU
$14.3B
$296M 0.8%
757,010
+14,056
+2% +$6.01M
SE icon
30
Sea Limited
SE
$80.5B
$294M 0.8%
1,315,594
-287,965
-18% -$86M
CCJ icon
31
Cameco
CCJ
$43B
$293M 0.79%
13,415,001
-1,209,528
-8% -$29.3M
AXON
32
Axon Enterprise
AXON
$51.7B
$286M 0.77%
1,819,656
-59,524
-3% -$9.99M
VIRT icon
33
Virtu Financial
VIRT
$4.86B
$281M 0.76%
9,742,120
+9,453
+0.1% +$258K
ICLR icon
34
Icon
ICLR
$12.8B
$280M 0.76%
902,807
-10,913
-1% -$3.05M
FOXF icon
35
Fox Factory Holding Corp
FOXF
$905M
$267M 0.72%
1,570,491
-89,125
-5% -$14.9M
ARES icon
36
Ares Management
ARES
$32.3B
$266M 0.72%
3,272,440
-163,932
-5% -$13.3M
WAL icon
37
Western Alliance Bancorporation
WAL
$8.89B
$266M 0.72%
2,469,420
+302,565
+14% +$34.1M
RYAAY icon
38
Ryanair
RYAAY
$30.8B
$265M 0.71%
6,464,348
+430,160
+7% +$18.7M
UNH icon
39
UnitedHealth
UNH
$365B
$264M 0.71%
525,500
+82,993
+19% +$37.6M
NBIS
40
Nebius Group N.V.
NBIS
$49.1B
$261M 0.71%
4,315,408
+91,379
+2% +$6.73M
LESL icon
41
Leslie's
LESL
$12.4M
$260M 0.7%
548,757
+163,146
+42% +$70.4M
DEN
42
DELISTED
Denbury Inc.
DEN
$256M 0.69%
3,341,888
-167,461
-5% -$13.3M
BFAM icon
43
Bright Horizons
BFAM
$3.76B
$254M 0.69%
2,016,248
-80,917
-4% -$11.2M
GWRE icon
44
Guidewire Software
GWRE
$14.7B
$252M 0.68%
2,216,665
+172,751
+8% +$20.5M
HZNP
45
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
$251M 0.68%
2,331,686
-785,682
-25% -$85.7M
SEDG icon
46
SolarEdge
SEDG
$2.05B
$251M 0.68%
893,189
+225,021
+34% +$71M
ACHC icon
47
Acadia Healthcare
ACHC
$2.9B
$248M 0.67%
4,085,533
-51,369
-1% -$3.06M
PFGC icon
48
Performance Food Group
PFGC
$17.9B
$244M 0.66%
5,317,981
+1,769,462
+50% +$80.4M
ALRM icon
49
Alarm.com
ALRM
$2.77B
$244M 0.66%
2,875,745
+202,964
+8% +$16.6M
PYPL icon
50
PayPal
PYPL
$50.5B
$241M 0.65%
1,276,682
+432,231
+51% +$93.5M
1
2
3 4 5

Similar funds

Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $30.5B AUM 29.95% 1-Year Est. Return
Lord, Abbett & Co
Lord, Abbett & Co Jersey City, New Jersey $30.6B AUM 57.44% 1-Year Est. Return
Eagle Capital Management (New York)
Eagle Capital Management (New York) New York $29.8B AUM 12.13% 1-Year Est. Return
State of Tennessee, Department of Treasury
State of Tennessee, Department of Treasury Nashville, Tennessee $29.8B AUM 29.48% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return
Ohio Public Employees Retirement System (OPERS)
Ohio Public Employees Retirement System (OPERS) Columbus, Ohio $30.9B AUM 29.72% 1-Year Est. Return
Coatue Management
Coatue Management New York $29.1B AUM 96.54% 1-Year Est. Return
Hudson Bay Capital Management
Hudson Bay Capital Management Stamford, Connecticut $29B AUM 30.2% 1-Year Est. Return

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.