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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
+11.26%
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
$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
PXD
101
DELISTED
Pioneer Natural Resource Co.
PXD
$90.3M 0.31%
442,095
+15,660
+4% +$3.37M
TXN icon
102
Texas Instruments
TXN
$254B
$90.1M 0.31%
484,589
+14,678
+3% +$2.58M
BURL icon
103
Burlington
BURL
$22.3B
$90M 0.31%
445,475
-294,424
-40% -$64.3M
MDB icon
104
MongoDB
MDB
$35.3B
$90M 0.31%
385,943
-1,423
-0.4% -$299K
MNST icon
105
Monster Beverage
MNST
$89.5B
$88.4M 0.31%
+3,273,044
New +$83.9M
TENB icon
106
Tenable Holdings
TENB
$4.05B
$86.6M 0.3%
+1,823,215
New +$77.4M
INFY icon
107
Infosys
INFY
$49.8B
$82.6M 0.29%
4,735,532
-62,332
-1% -$1.13M
SHLS icon
108
Shoals Technologies Group
SHLS
$1.39B
$79.5M 0.28%
3,490,138
-239,745
-6% -$5.92M
MKSI icon
109
MKS Inc
MKSI
$21B
$79.5M 0.28%
897,047
+8,796
+1% +$839K
SITE icon
110
SiteOne Landscape Supply
SITE
$4.24B
$78.2M 0.27%
+571,341
New +$80.5M
OEC icon
111
Orion
OEC
$367M
$77.6M 0.27%
2,975,307
-372,252
-11% -$8.42M
VRRM icon
112
Verra Mobility
VRRM
$715M
$76.5M 0.27%
4,523,424
-609,577
-12% -$9.75M
AIN icon
113
Albany International
AIN
$1.82B
$73.4M 0.26%
821,507
-29,885
-4% -$3.02M
WAL icon
114
Western Alliance Bancorporation
WAL
$9.03B
$65.5M 0.23%
1,841,813
-744,154
-29% -$45.6M
SKY icon
115
Champion Homes
SKY
$5.07B
$64.7M 0.23%
859,905
+74,769
+10% +$4.82M
TW icon
116
Tradeweb Markets
TW
$22B
$63.6M 0.22%
+805,076
New +$58.3M
INSM icon
117
Insmed
INSM
$28.9B
$63.2M 0.22%
3,706,678
+316,513
+9% +$6.15M
SLVM icon
118
Sylvamo
SLVM
$1.55B
$62.9M 0.22%
1,359,588
+924,674
+213% +$43.9M
LRCX icon
119
Lam Research
LRCX
$409B
$62M 0.22%
1,169,060
+108,450
+10% +$5.32M
ERII icon
120
Energy Recovery
ERII
$402M
$59.4M 0.21%
2,576,781
+37,840
+1% +$831K
ASR icon
121
Grupo Aeroportuario del Sureste
ASR
$8.24B
$55.4M 0.19%
180,798
+60,950
+51% +$17.2M
LOPE icon
122
Grand Canyon Education
LOPE
$3.71B
$55M 0.19%
482,687
-23,836
-5% -$2.68M
TMO icon
123
Thermo Fisher Scientific
TMO
$223B
$51.6M 0.18%
89,556
-2,858
-3% -$1.61M
ULTA icon
124
Ulta Beauty
ULTA
$23B
$51M 0.18%
93,477
-28,589
-23% -$14.7M
ACVA icon
125
ACV Auctions
ACVA
$1.37B
$50.4M 0.18%
3,907,765
+379,155
+11% +$4.14M
3 4
5
6 7

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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.