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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
LNTH icon
201
Lantheus
LNTH
$6.57B
$34.5M 0.1%
556,710
+214,702
+63% +$14.5M
CMC icon
202
Commercial Metals
CMC
$8B
$34.5M 0.1%
+688,756
New +$31.4M
BOOT icon
203
Boot Barn
BOOT
$4.87B
$34.4M 0.1%
448,742
+15,224
+4% +$1.14M
PGTI
204
DELISTED
PGT, Inc.
PGTI
$34.3M 0.1%
842,026
-796,949
-49% -$25.9M
ZIP icon
205
ZipRecruiter
ZIP
$405M
$34M 0.1%
2,445,105
+99,837
+4% +$1.23M
WK icon
206
Workiva
WK
$3.7B
$33.4M 0.1%
328,887
-25,637
-7% -$2.47M
WINA icon
207
Winmark
WINA
$1.24B
$33.2M 0.1%
79,579
+2,682
+3% +$1.13M
CSGS
208
DELISTED
CSG Systems International
CSGS
$32.7M 0.1%
614,028
-13,350
-2% -$684K
BDC icon
209
Belden
BDC
$5.39B
$32.6M 0.09%
421,762
+32,198
+8% +$2.39M
THS
210
DELISTED
Treehouse Foods
THS
$32.5M 0.09%
783,764
+152,991
+24% +$6.28M
DIOD icon
211
Diodes
DIOD
$4.93B
$32.5M 0.09%
403,167
+254,758
+172% +$18.6M
ECVT icon
212
Ecovyst
ECVT
$1.09B
$32.4M 0.09%
3,316,400
-54,209
-2% -$516K
BCPC
213
Balchem Corp
BCPC
$5.73B
$31.9M 0.09%
214,454
+30,538
+17% +$3.9M
PBF icon
214
PBF Energy
PBF
$8.34B
$31.8M 0.09%
722,568
-10,937
-1% -$497K
MTDR icon
215
Matador Resources
MTDR
$6.5B
$31.7M 0.09%
558,169
-8,742
-2% -$512K
ADC icon
216
Agree Realty
ADC
$9.25B
$31.7M 0.09%
504,100
-52,030
-9% -$3.02M
MRTN icon
217
Marten Transport
MRTN
$1.22B
$31.7M 0.09%
1,510,375
-30,103
-2% -$575K
MYE icon
218
Myers Industries
MYE
$1.23B
$31.7M 0.09%
1,619,136
-33,705
-2% -$600K
WERN icon
219
Werner Enterprises
WERN
$2.27B
$31.5M 0.09%
744,517
-14,940
-2% -$585K
SPB icon
220
Spectrum Brands
SPB
$2.03B
$31.5M 0.09%
394,615
+115,117
+41% +$8.67M
OXM icon
221
Oxford Industries
OXM
$538M
$31.4M 0.09%
314,051
-5,764
-2% -$536K
EFSC icon
222
Enterprise Financial Services Corp
EFSC
$2.41B
$31.2M 0.09%
699,442
-14,036
-2% -$548K
WAFD icon
223
WaFd
WAFD
$2.79B
$30.9M 0.09%
936,520
-19,023
-2% -$526K
UMH
224
UMH Properties
UMH
$1.39B
$30.8M 0.09%
2,007,854
-43,720
-2% -$630K
FRME icon
225
First Merchants
FRME
$2.72B
$30.6M 0.09%
826,384
-16,991
-2% -$526K
7 8
9
10 11

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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.