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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
MRTN icon
251
Marten Transport
MRTN
$1.22B
$31.1M 0.08%
1,809,864
-150,441
-8% -$2.49M
AEIS icon
252
Advanced Energy
AEIS
$13.5B
$30.6M 0.08%
336,500
+306,370
+1,017% +$27.3M
CGNT icon
253
Cognyte Software
CGNT
$675M
$30.4M 0.08%
1,941,412
+995,237
+105% +$20.1M
SHO icon
254
Sunstone Hotel Investors
SHO
$2.01B
$30.3M 0.08%
2,586,549
-197,729
-7% -$2.37M
GOGO icon
255
Gogo Inc
GOGO
$383M
$30M 0.08%
2,214,952
+23,896
+1% +$355K
DOC
256
DELISTED
PHYSICIANS REALTY TRUST
DOC
$29.7M 0.08%
1,578,861
-141,815
-8% -$2.61M
URBN icon
257
Urban Outfitters
URBN
$6.63B
$29.6M 0.08%
1,009,815
-82,101
-8% -$2.6M
FOLD
258
DELISTED
Amicus Therapeutics
FOLD
$28.6M 0.08%
2,476,721
+501,749
+25% +$5.59M
WSC icon
259
WillScot Mobile Mini Holdings
WSC
$4B
$28.4M 0.08%
695,601
+207,252
+42% +$7.65M
ESRT icon
260
Empire State Realty Trust
ESRT
$817M
$27.8M 0.08%
3,124,050
+19,222
+0.6% +$190K
CDNS icon
261
Cadence Design Systems
CDNS
$89B
$27.8M 0.08%
149,110
-92,724
-38% -$16.2M
LZB icon
262
La-Z-Boy
LZB
$1.64B
$26.6M 0.07%
+732,965
New +$25.6M
BDN
263
Brandywine Realty Trust
BDN
$541M
$26.3M 0.07%
1,962,631
-140,909
-7% -$1.94M
SP
264
DELISTED
SP Plus Corporation
SP
$26.1M 0.07%
926,497
-76,341
-8% -$2.29M
UEIC icon
265
Universal Electronics
UEIC
$75.8M
$26.1M 0.07%
639,322
-53,388
-8% -$2.21M
ELS icon
266
Equity Lifestyle Properties
ELS
$12.4B
$25.8M 0.07%
294,131
-45,988
-14% -$3.87M
RAMP icon
267
LiveRamp
RAMP
$2.3B
$25.6M 0.07%
533,703
+5,592
+1% +$282K
OC icon
268
Owens Corning
OC
$12.3B
$25.3M 0.07%
279,412
-58,507
-17% -$5.31M
IPAR icon
269
Interparfums
IPAR
$3.78B
$24.8M 0.07%
231,837
+3,796
+2% +$341K
LGTY
270
DELISTED
Logility Supply Chain Solutions, Inc. Common Stock
LGTY
$24.5M 0.07%
935,498
+10,372
+1% +$276K
AKR icon
271
Acadia Realty Trust
AKR
$2.84B
$24.5M 0.07%
1,120,204
+34,265
+3% +$748K
BALL icon
272
Ball Corp
BALL
$16.4B
$24.4M 0.07%
253,034
-78,258
-24% -$7.23M
NVEI
273
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
$24.1M 0.07%
+371,658
New +$36.6M
SITM icon
274
SiTime
SITM
$20.5B
$24M 0.06%
81,978
-57,394
-41% -$15M
WINA icon
275
Winmark
WINA
$1.24B
$23.9M 0.06%
96,387
+843
+0.9% +$204K
9 10
11
12 13

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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.