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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
HEI.A icon
76
HEICO Corp Class A
HEI.A
$38.1B
$153M 0.45%
1,077,302
-262,716
-20% -$35.6M
NEOG icon
77
Neogen
NEOG
$2.57B
$152M 0.44%
7,536,169
+2,740,643
+57% +$46.4M
SMCI icon
78
Super Micro Computer
SMCI
$25.7B
$151M 0.44%
5,308,150
+175,370
+3% +$4.86M
HDB icon
79
HDFC Bank
HDB
$119B
$149M 0.43%
4,445,634
-1,018,758
-19% -$30.7M
EG icon
80
Everest Group
EG
$14.1B
$148M 0.43%
419,246
+155,458
+59% +$60.2M
VRNS icon
81
Varonis Systems
VRNS
$5.19B
$147M 0.43%
3,249,245
-2,915
-0.1% -$110K
CSGP icon
82
CoStar Group
CSGP
$13.2B
$147M 0.43%
1,678,036
+66,306
+4% +$5.37M
CWAN
83
DELISTED
Clearwater Analytics
CWAN
$146M 0.42%
+7,273,914
New +$143M
NKE icon
84
Nike
NKE
$61.4B
$143M 0.42%
1,317,083
+96,002
+8% +$10.3M
FSV icon
85
FirstService
FSV
$6.19B
$140M 0.41%
864,756
+473
+0.1% +$71.5K
BLD
86
DELISTED
TopBuild
BLD
$136M 0.4%
362,862
-15,306
-4% -$4.38M
GLOB icon
87
Globant
GLOB
$1.79B
$134M 0.39%
563,925
-294,989
-34% -$60.2M
TENB icon
88
Tenable Holdings
TENB
$4.36B
$134M 0.39%
2,905,742
-122,568
-4% -$5.16M
INSM icon
89
Insmed
INSM
$27.9B
$132M 0.38%
4,256,687
+14,752
+0.3% +$383K
TWST icon
90
Twist Bioscience
TWST
$7.81B
$131M 0.38%
3,549,874
-23,549
-0.7% -$545K
RYAAY icon
91
Ryanair
RYAAY
$30.7B
$126M 0.37%
2,359,180
-38,233
-2% -$1.68M
EVH icon
92
Evolent Health
EVH
$516M
$125M 0.36%
3,778,453
+1,156,004
+44% +$32.7M
CERT icon
93
Certara
CERT
$1.25B
$124M 0.36%
7,042,316
-108,598
-2% -$1.59M
SBUX icon
94
Starbucks
SBUX
$125B
$123M 0.36%
1,278,750
+75,230
+6% +$7.32M
GMED icon
95
Globus Medical
GMED
$11.5B
$122M 0.36%
2,293,227
-23,145
-1% -$1.13M
FTI icon
96
TechnipFMC
FTI
$30B
$122M 0.35%
6,040,071
-1,061,704
-15% -$21.8M
HQY icon
97
HealthEquity
HQY
$8.79B
$118M 0.34%
1,782,911
-862,333
-33% -$59.8M
EXP icon
98
Eagle Materials
EXP
$6.4B
$118M 0.34%
582,460
-84,414
-13% -$14.8M
ENTG icon
99
Entegris
ENTG
$25B
$117M 0.34%
972,755
-53,995
-5% -$5.48M
SPSC icon
100
SPS Commerce
SPSC
$2.86B
$113M 0.33%
580,650
+11,192
+2% +$1.95M
2 3
4
5 6

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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.