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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
AUB icon
176
Atlantic Union Bankshares
AUB
$6.1B
$35.1M 0.12%
1,001,357
+2,764
+0.3% +$102K
SR icon
177
Spire
SR
$4.9B
$34.9M 0.12%
498,003
+2,058
+0.4% +$146K
XPRO icon
178
Expro Ltd
XPRO
$2.06B
$34.8M 0.12%
1,896,677
-115,762
-6% -$2.27M
NTCT icon
179
NETSCOUT
NTCT
$2.88B
$34.8M 0.12%
1,215,223
+3,552
+0.3% +$106K
VRNT
180
DELISTED
Verint Systems
VRNT
$34.7M 0.12%
932,956
+240,706
+35% +$8.98M
STAG icon
181
STAG Industrial
STAG
$7.14B
$34.6M 0.12%
+1,022,017
New +$34.9M
NWE icon
182
NorthWestern Energy
NWE
$4.39B
$34.6M 0.12%
597,267
+2,183
+0.4% +$125K
COLD icon
183
Americold
COLD
$4.35B
$34.5M 0.12%
1,214,168
+344,075
+40% +$10.3M
AWI icon
184
Armstrong World Industries
AWI
$7.73B
$34.3M 0.12%
482,145
+63,901
+15% +$4.78M
KALU icon
185
Kaiser Aluminum
KALU
$3.04B
$34.2M 0.12%
458,589
+2,738
+0.6% +$221K
BOOT icon
186
Boot Barn
BOOT
$5B
$34.2M 0.12%
446,397
+36,319
+9% +$2.78M
MRTN icon
187
Marten Transport
MRTN
$1.24B
$34.2M 0.12%
1,630,490
+5,844
+0.4% +$124K
MTG icon
188
MGIC Investment
MTG
$6.29B
$34.1M 0.12%
2,541,332
+7,256
+0.3% +$97.7K
HR icon
189
Healthcare Realty
HR
$6.6B
$34.1M 0.12%
1,762,414
+419,748
+31% +$8.46M
WK icon
190
Workiva
WK
$3.71B
$33.9M 0.12%
331,061
+145,535
+78% +$13.2M
EFSC icon
191
Enterprise Financial Services Corp
EFSC
$2.42B
$33.7M 0.12%
755,273
+1,699
+0.2% +$86.9K
THS
192
DELISTED
Treehouse Foods
THS
$33.6M 0.12%
665,327
+2,101
+0.3% +$102K
TCBI icon
193
Texas Capital Bancshares
TCBI
$4.4B
$33.5M 0.12%
684,173
+1,485
+0.2% +$91.2K
PLOW icon
194
Douglas Dynamics
PLOW
$983M
$33.5M 0.12%
1,049,149
+101,801
+11% +$3.75M
PDFS icon
195
PDF Solutions
PDFS
$2.14B
$33.3M 0.12%
784,917
-54,923
-7% -$1.92M
PBF icon
196
PBF Energy
PBF
$8.63B
$33.2M 0.12%
+766,493
New +$32.3M
BFAM icon
197
Bright Horizons
BFAM
$3.8B
$33.2M 0.12%
431,007
+171,536
+66% +$13.2M
BLK icon
198
Blackrock
BLK
$181B
$33.1M 0.12%
49,523
-1,678
-3% -$1.18M
ZIP icon
199
ZipRecruiter
ZIP
$381M
$33M 0.11%
2,068,656
+144,991
+8% +$2.62M
ADSK icon
200
Autodesk
ADSK
$51.8B
$32.9M 0.11%
158,212
-5,237
-3% -$1.08M
6 7
8
9 10

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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.