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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
+10.03%
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
$26.1B
AUM Growth
+$841M
Cap. Flow
-$982M
Cap. Flow %
-3.76%
Top 10 Hldgs %
17.15%
Holding
419
New
32
Increased
142
Reduced
225
Closed
18

Top Buys

Rank Stock Value
1
MZTI
The Marzetti Company
MZTI
+$142M
2
AMBA icon
Ambarella
AMBA
+$92.4M
3
G icon
Genpact
G
+$92.1M
4
CMG icon
Chipotle Mexican Grill
CMG
+$83.1M
5
CG icon
Carlyle Group
CG
+$81.2M

Top Sells

Rank Stock Value
1
ABMD
Abiomed Inc
ABMD
+$241M
2
HZNP
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
+$155M
3
DEN
Denbury Inc.
DEN
+$144M
4
RBA icon
RB Global
RBA
+$101M
5
CABO icon
Cable One
CABO
+$88.8M

Sector Composition

Rank Sector Weight
1 Technology 22.72%
2 Healthcare 17.24%
3 Industrials 15.95%
4 Consumer Discretionary 14.35%
5 Financials 11.06%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AIN icon
101
Albany International
AIN
$1.81B
$83.9M 0.32%
851,392
-14,195
-2% -$1.36M
ORLY icon
102
O'Reilly Automotive
ORLY
$74.5B
$82.2M 0.31%
+1,461,495
New +$78.6M
CMG icon
103
Chipotle Mexican Grill
CMG
$41.3B
$81.6M 0.31%
2,939,300
+2,779,800
+1,743% +$83.1M
TXN icon
104
Texas Instruments
TXN
$253B
$77.6M 0.3%
469,911
-76,492
-14% -$12.8M
MDB icon
105
MongoDB
MDB
$35.2B
$76.2M 0.29%
387,366
+371,582
+2,354% +$66.1M
MKSI icon
106
MKS Inc
MKSI
$20.7B
$75.3M 0.29%
888,251
-63,476
-7% -$5.09M
PANW icon
107
Palo Alto Networks
PANW
$315B
$72.5M 0.28%
1,039,380
+1,001,690
+2,658% +$80.4M
VRRM icon
108
Verra Mobility
VRRM
$714M
$71M 0.27%
5,133,001
+237,239
+5% +$3.61M
WOLF icon
109
Wolfspeed
WOLF
$1.65B
$69.7M 0.27%
1,008,843
-20,881
-2% -$1.85M
INSM icon
110
Insmed
INSM
$28.9B
$67.7M 0.26%
3,390,165
-166,419
-5% -$3.22M
FRPT icon
111
Freshpet
FRPT
$3.48B
$65.9M 0.25%
+1,249,208
New +$74.3M
ITUB icon
112
Itaú Unibanco
ITUB
$81.6B
$61M 0.23%
14,678,691
-5,785,658
-28% -$26.3M
ACH
113
Accendra Health
ACH
$93.1M
$60.9M 0.23%
3,116,585
+55,753
+2% +$1.09M
OEC icon
114
Orion
OEC
$364M
$59.6M 0.23%
3,347,559
+102,751
+3% +$1.73M
ULTA icon
115
Ulta Beauty
ULTA
$22.9B
$57.3M 0.22%
122,066
-43,835
-26% -$18.9M
AMD icon
116
Advanced Micro Devices
AMD
$788B
$55.4M 0.21%
856,097
+57,065
+7% +$3.77M
BDC icon
117
Belden
BDC
$5.39B
$53.7M 0.21%
747,109
-111,927
-13% -$8.12M
LOPE icon
118
Grand Canyon Education
LOPE
$3.7B
$53.5M 0.2%
506,523
+17,307
+4% +$1.73M
ERII icon
119
Energy Recovery
ERII
$397M
$52M 0.2%
2,538,941
-3,268
-0.1% -$71.5K
INMD icon
120
InMode
INMD
$876M
$51.5M 0.2%
1,443,425
-22,527
-2% -$784K
TMO icon
121
Thermo Fisher Scientific
TMO
$223B
$50.9M 0.19%
92,414
-30,554
-25% -$16.2M
TWST icon
122
Twist Bioscience
TWST
$7.85B
$48.5M 0.19%
2,037,676
+63,291
+3% +$1.84M
EFX icon
123
Equifax
EFX
$21.2B
$45.5M 0.17%
234,041
-132,951
-36% -$24.3M
MEI icon
124
Methode Electronics
MEI
$602M
$45.5M 0.17%
1,024,780
-23,591
-2% -$1.01M
BPMC
125
DELISTED
Blueprint Medicines
BPMC
$44.9M 0.17%
1,024,614
-49,670
-5% -$2.38M
3 4
5
6 7

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William Blair Investment Management's Q4 2022 Portfolio in Review

As of Q4 2022, William Blair Investment Management held 419 positions worth $26.1B, up 3.3% from $25.3B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

William Blair Investment Management withdrew a net $982M in Q4 2022, closing 18 positions and reducing 225 holdings. Its most notable exit was Abiomed Inc, an estimated $241M position sold in full.

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

Against the trend, William Blair Investment Management opened a new position in The Marzetti Company worth $148M.

  • William Blair Investment Management's largest Q4 2022 buy was The Marzetti Company: 748,865 shares worth $148M.
  • William Blair Investment Management added most to Chipotle Mexican Grill in Q4 2022, an estimated $83.1M increase.
  • William Blair Investment Management's biggest Q4 2022 reduction was Horizon Therapeutics Public Limited Company Ordinary Shares, cutting an estimated $155M.
  • William Blair Investment Management fully exited Abiomed Inc in Q4 2022, selling an estimated $241M.
  • William Blair Investment Management's ten largest holdings make up 17% of its $26.1B portfolio in Q4 2022.
  • William Blair Investment Management opened 32 new positions and closed 18 in Q4 2022.
  • William Blair Investment Management's portfolio value rose 3.3% quarter-over-quarter to $26.1B.

Based on William Blair Investment Management's 13F filing for Q4 2022, filed 9 Feb 2023.