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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
+11.26%
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
$28.7B
AUM Growth
+$2.56B
Cap. Flow
+$530M
Cap. Flow %
1.85%
Top 10 Hldgs %
19.55%
Holding
425
New
24
Increased
254
Reduced
112
Closed
32

Top Buys

Rank Stock Value
1
RACE icon
Ferrari
RACE
+$191M
2
TSM icon
TSMC
TSM
+$128M
3
KOS icon
Kosmos Energy
KOS
+$111M
4
FIVE icon
Five Below
FIVE
+$111M
5
AMD icon
Advanced Micro Devices
AMD
+$86.5M

Top Sells

Rank Stock Value
1
HALO icon
Halozyme
HALO
+$211M
2
SYK icon
Stryker
SYK
+$153M
3
WH icon
Wyndham Hotels & Resorts
WH
+$113M
4
FTI icon
TechnipFMC
FTI
+$92.8M
5
AZTA icon
Azenta
AZTA
+$78.7M

Sector Composition

Rank Sector Weight
1 Technology 25.27%
2 Industrials 16.92%
3 Consumer Discretionary 15.22%
4 Healthcare 14.65%
5 Financials 9.04%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TSM icon
1
TSMC
TSM
$2.18T
$1.04B 3.63%
11,191,148
+1,428,917
+15% +$128M
MSFT icon
2
Microsoft
MSFT
$3.71T
$970M 3.38%
3,363,154
+147,886
+5% +$37.7M
GOOGL icon
3
Alphabet (Google) Class A
GOOGL
$4.33T
$534M 1.86%
5,147,448
+579,936
+13% +$55.6M
MELI icon
4
Mercado Libre
MELI
$92.3B
$483M 1.68%
366,157
+45,580
+14% +$51.8M
LIN icon
5
Linde
LIN
$226B
$481M 1.68%
1,354,416
+32,706
+2% +$11M
AMZN icon
6
Amazon
AMZN
$2.96T
$465M 1.62%
4,499,116
+403,759
+10% +$39M
MA icon
7
Mastercard
MA
$493B
$455M 1.59%
1,252,707
+28,289
+2% +$10.3M
CP icon
8
Canadian Pacific Kansas City
CP
$80.5B
$416M 1.45%
5,404,219
+266,441
+5% +$20.6M
BWXT icon
9
BWX Technologies
BWXT
$15.6B
$400M 1.4%
6,351,881
+102,849
+2% +$6.2M
BLDR icon
10
Builders FirstSource
BLDR
$8.04B
$366M 1.27%
4,118,744
-273,194
-6% -$21.6M
UNH icon
11
UnitedHealth
UNH
$370B
$348M 1.21%
735,477
+79,641
+12% +$38.4M
AXON
12
Axon Enterprise
AXON
$46.4B
$316M 1.1%
1,407,045
-297,644
-17% -$59.2M
CHE icon
13
Chemed
CHE
$7.22B
$302M 1.05%
560,741
+59,149
+12% +$30.2M
ICLR icon
14
Icon
ICLR
$12.7B
$288M 1%
1,347,623
-136,678
-9% -$30.4M
EEFT icon
15
Euronet Worldwide
EEFT
$2.7B
$287M 1%
2,567,417
+37,611
+1% +$4.07M
EHC icon
16
Encompass Health
EHC
$12.4B
$287M 1%
5,307,518
+883,930
+20% +$51.5M
BCO icon
17
Brink's
BCO
$4.62B
$287M 1%
4,291,248
-89,276
-2% -$5.67M
MRCY icon
18
Mercury Systems
MRCY
$6.52B
$273M 0.95%
5,348,358
+142,390
+3% +$7.2M
CCJ icon
19
Cameco
CCJ
$42.4B
$268M 0.93%
10,240,433
-965,273
-9% -$25.5M
PEN icon
20
Penumbra
PEN
$12.8B
$262M 0.91%
940,732
-248,238
-21% -$63.4M
NICE icon
21
Nice
NICE
$5.97B
$259M 0.9%
1,131,024
+162,164
+17% +$34.1M
GWRE icon
22
Guidewire Software
GWRE
$14.2B
$258M 0.9%
3,145,395
+882,514
+39% +$64.2M
MMSI icon
23
Merit Medical Systems
MMSI
$5.32B
$251M 0.88%
3,395,832
-334,148
-9% -$23.4M
PFGC icon
24
Performance Food Group
PFGC
$18B
$243M 0.85%
4,030,511
-590,752
-13% -$34.5M
CWST icon
25
Casella Waste Systems
CWST
$5.69B
$243M 0.85%
2,937,883
+498,318
+20% +$39.4M
1
2 3 4 5

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William Blair Investment Management's Q1 2023 Portfolio in Review

As of Q1 2023, William Blair Investment Management held 425 positions worth $28.7B, up 9.8% from $26.1B the previous quarter. Its ten largest holdings account for 20% of the portfolio.

William Blair Investment Management's Q1 2023 filing shows 24 new, 254 increased, 112 reduced and 32 closed positions. Its largest new stake was Ferrari: 749,761 shares worth $203M. The largest sale was Halozyme, an estimated $211M.

By sector, the portfolio is most concentrated in Technology at 25% of assets, up from 23% a quarter earlier, followed by Industrials and Consumer Discretionary.

  • William Blair Investment Management's largest Q1 2023 buy was Ferrari: 749,761 shares worth $203M.
  • William Blair Investment Management added most to TSMC in Q1 2023, an estimated $128M increase.
  • William Blair Investment Management's biggest Q1 2023 reduction was Wyndham Hotels & Resorts, cutting an estimated $113M.
  • William Blair Investment Management fully exited Halozyme in Q1 2023, selling an estimated $211M.
  • William Blair Investment Management's ten largest holdings make up 20% of its $28.7B portfolio in Q1 2023.
  • William Blair Investment Management opened 24 new positions and closed 32 in Q1 2023.
  • William Blair Investment Management's portfolio value rose 9.8% quarter-over-quarter to $28.7B.

Based on William Blair Investment Management's 13F filing for Q1 2023, filed 12 May 2023.