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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
+15.93%
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
$34.4B
AUM Growth
+$4.27B
Cap. Flow
+$63.7M
Cap. Flow %
0.19%
Top 10 Hldgs %
22.06%
Holding
433
New
35
Increased
127
Reduced
244
Closed
27

Top Buys

Rank Stock Value
1
PDD icon
Pinduoduo
PDD
+$279M
2
CRH icon
CRH
CRH
+$151M
3
CWAN
Clearwater Analytics
CWAN
+$143M
4
EXLS icon
EXL Service
EXLS
+$102M
5
A icon
Agilent Technologies
A
+$76.4M

Top Sells

Rank Stock Value
1
PFGC icon
Performance Food Group
PFGC
+$156M
2
PXD
Pioneer Natural Resource Co.
PXD
+$101M
3
CP icon
Canadian Pacific Kansas City
CP
+$97.2M
4
WOLF icon
Wolfspeed
WOLF
+$86.6M
5
AXON
Axon Enterprise
AXON
+$79.8M

Sector Composition

Rank Sector Weight
1 Technology 27.13%
2 Healthcare 15.5%
3 Consumer Discretionary 15.19%
4 Industrials 14.17%
5 Financials 9.11%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EXLS icon
101
EXL Service
EXLS
$5.23B
$111M 0.32%
+3,611,102
New +$102M
FLYW icon
102
Flywire
FLYW
$2.11B
$111M 0.32%
4,792,643
+1,646,170
+52% +$41.5M
CGNX icon
103
Cognex
CGNX
$10.4B
$110M 0.32%
2,628,528
-139,763
-5% -$5.37M
WSC icon
104
WillScot Mobile Mini Holdings
WSC
$4.07B
$106M 0.31%
2,384,770
-259,524
-10% -$10.5M
AMBA icon
105
Ambarella
AMBA
$3.65B
$100M 0.29%
1,637,795
-30,135
-2% -$1.64M
LSCC icon
106
Lattice Semiconductor
LSCC
$18.2B
$96.3M 0.28%
1,395,970
-30,733
-2% -$2.04M
EEFT icon
107
Euronet Worldwide
EEFT
$2.61B
$94.3M 0.27%
929,297
-349,756
-27% -$29.8M
SHLS icon
108
Shoals Technologies Group
SHLS
$1.43B
$92.6M 0.27%
5,957,680
+22,899
+0.4% +$347K
SKY icon
109
Champion Homes
SKY
$5.08B
$91.5M 0.27%
1,232,524
+120,490
+11% +$7.58M
BURL icon
110
Burlington
BURL
$22.2B
$90.8M 0.26%
467,121
+110,825
+31% +$16.5M
A icon
111
Agilent Technologies
A
$42.1B
$90.1M 0.26%
648,213
+642,295
+10,853% +$76.4M
CNI icon
112
Canadian National Railway
CNI
$76.4B
$88.8M 0.26%
706,836
-17,411
-2% -$1.97M
VEEV icon
113
Veeva Systems
VEEV
$38.5B
$88.3M 0.26%
458,555
-227,249
-33% -$42.8M
RVLV icon
114
Revolve Group
RVLV
$1.7B
$88.1M 0.26%
5,315,083
-172,918
-3% -$2.55M
CRL icon
115
Charles River Laboratories
CRL
$13.7B
$87.6M 0.26%
370,603
-15,615
-4% -$3.07M
VRRM icon
116
Verra Mobility
VRRM
$717M
$87.1M 0.25%
3,782,467
-263,796
-7% -$5.41M
SITE icon
117
SiteOne Landscape Supply
SITE
$4.25B
$84.8M 0.25%
522,009
-22,024
-4% -$3.21M
KOS icon
118
Kosmos Energy
KOS
$1.49B
$81.8M 0.24%
12,194,346
-504,658
-4% -$3.53M
ITUB icon
119
Itaú Unibanco
ITUB
$82.2B
$78.6M 0.23%
12,825,947
+1,956,799
+18% +$10.4M
UBER icon
120
Uber
UBER
$153B
$78M 0.23%
+1,267,075
New +$66.3M
AIN icon
121
Albany International
AIN
$1.81B
$76.5M 0.22%
779,340
+48,682
+7% +$4.25M
NE icon
122
Noble Corp
NE
$7.09B
$74.5M 0.22%
1,546,950
-64,072
-4% -$2.99M
ACVA icon
123
ACV Auctions
ACVA
$1.37B
$74.1M 0.22%
4,888,409
+518,542
+12% +$7.6M
SLVM icon
124
Sylvamo
SLVM
$1.58B
$72.3M 0.21%
1,471,571
-302,416
-17% -$14.1M
RRX icon
125
Regal Rexnord
RRX
$11.5B
$71.6M 0.21%
483,683
-19,530
-4% -$2.46M
3 4
5
6 7

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William Blair Investment Management's Q4 2023 Portfolio in Review

As of Q4 2023, William Blair Investment Management held 433 positions worth $34.4B, up 14% from $30.1B the previous quarter. Its ten largest holdings account for 22% of the portfolio.

William Blair Investment Management's Q4 2023 filing shows 35 new, 127 increased, 244 reduced and 27 closed positions. Its largest new stake was Pinduoduo: 2,300,793 shares worth $336M. The largest sale was Performance Food Group, an estimated $156M.

By sector, the portfolio is most concentrated in Technology at 27% of assets, up from 26% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • William Blair Investment Management's largest Q4 2023 buy was Pinduoduo: 2,300,793 shares worth $336M.
  • William Blair Investment Management added most to CRH in Q4 2023, an estimated $151M increase.
  • William Blair Investment Management's biggest Q4 2023 reduction was Performance Food Group, cutting an estimated $156M.
  • William Blair Investment Management fully exited Pioneer Natural Resource Co. in Q4 2023, selling an estimated $101M.
  • William Blair Investment Management's ten largest holdings make up 22% of its $34.4B portfolio in Q4 2023.
  • William Blair Investment Management opened 35 new positions and closed 27 in Q4 2023.
  • William Blair Investment Management's portfolio value rose 14% quarter-over-quarter to $34.4B.

Based on William Blair Investment Management's 13F filing for Q4 2023, filed 9 Feb 2024.