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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
-2.74%
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
$30.1B
AUM Growth
-$1.09B
Cap. Flow
+$378M
Cap. Flow %
1.26%
Top 10 Hldgs %
21.93%
Holding
430
New
35
Increased
162
Reduced
197
Closed
32

Top Buys

Rank Stock Value
1
NVDA icon
NVIDIA
NVDA
+$192M
2
SMCI icon
Super Micro Computer
SMCI
+$143M
3
LSCC icon
Lattice Semiconductor
LSCC
+$129M
4
CG icon
Carlyle Group
CG
+$114M
5
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$111M

Top Sells

Rank Stock Value
1
DEN
Denbury Inc.
DEN
+$179M
2
PLNT icon
Planet Fitness
PLNT
+$170M
3
MLM icon
Martin Marietta Materials
MLM
+$141M
4
BLDR icon
Builders FirstSource
BLDR
+$135M
5
CCJ icon
Cameco
CCJ
+$123M

Sector Composition

Rank Sector Weight
1 Technology 25.88%
2 Industrials 15.76%
3 Healthcare 15.67%
4 Consumer Discretionary 13.72%
5 Financials 8.88%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
RYAAY icon
101
Ryanair
RYAAY
$30.8B
$93.2M 0.31%
2,397,413
+1,617,733
+207% +$65.7M
SITE icon
102
SiteOne Landscape Supply
SITE
$4.24B
$88.9M 0.3%
544,033
-11,291
-2% -$1.84M
NEOG icon
103
Neogen
NEOG
$2.5B
$88.9M 0.3%
4,795,526
+306,111
+7% +$6.67M
AMBA icon
104
Ambarella
AMBA
$3.66B
$88.5M 0.29%
1,667,930
-10,210
-0.6% -$717K
TXN icon
105
Texas Instruments
TXN
$254B
$88M 0.29%
553,615
+52,482
+10% +$8.95M
WOLF icon
106
Wolfspeed
WOLF
$1.68B
$86.6M 0.29%
2,273,227
-30,298
-1% -$1.59M
MLM icon
107
Martin Marietta Materials
MLM
$32.7B
$82.8M 0.28%
201,832
-318,234
-61% -$141M
NE icon
108
Noble Corp
NE
$7.05B
$81.6M 0.27%
+1,611,022
New +$82.1M
CNI icon
109
Canadian National Railway
CNI
$76.4B
$78.4M 0.26%
724,247
-270,054
-27% -$31M
NATI
110
DELISTED
National Instruments Corp
NATI
$78.3M 0.26%
1,313,891
-449,321
-25% -$26.4M
SLVM icon
111
Sylvamo
SLVM
$1.55B
$77.9M 0.26%
1,773,987
+241,441
+16% +$10.4M
CRL icon
112
Charles River Laboratories
CRL
$13.7B
$75.7M 0.25%
386,218
-8,041
-2% -$1.65M
VRRM icon
113
Verra Mobility
VRRM
$714M
$75.7M 0.25%
4,046,263
-577,153
-12% -$11.2M
RVLV icon
114
Revolve Group
RVLV
$1.68B
$74.7M 0.25%
5,488,001
-83,585
-2% -$1.33M
BPMC
115
DELISTED
Blueprint Medicines
BPMC
$73.2M 0.24%
1,456,629
-17,861
-1% -$954K
TWST icon
116
Twist Bioscience
TWST
$7.83B
$72.4M 0.24%
3,573,423
-42,375
-1% -$931K
INFY icon
117
Infosys
INFY
$49.5B
$71.9M 0.24%
4,204,543
-140,525
-3% -$2.4M
RRX icon
118
Regal Rexnord
RRX
$11.5B
$71.9M 0.24%
+503,213
New +$77.4M
EVH icon
119
Evolent Health
EVH
$485M
$71.4M 0.24%
2,622,449
-48,511
-2% -$1.35M
SKY icon
120
Champion Homes
SKY
$5.05B
$70.9M 0.24%
1,112,034
+178,099
+19% +$12M
FOXF icon
121
Fox Factory Holding Corp
FOXF
$902M
$66.9M 0.22%
675,130
-594,889
-47% -$63.6M
ACVA icon
122
ACV Auctions
ACVA
$1.37B
$66.3M 0.22%
4,369,867
+350,865
+9% +$5.7M
AIN icon
123
Albany International
AIN
$1.81B
$63M 0.21%
730,658
-103,433
-12% -$9.42M
MDRX
124
DELISTED
Veradigm Inc. Common Stock
MDRX
$57.5M 0.19%
4,375,005
+623,438
+17% +$8.18M
SNPS icon
125
Synopsys
SNPS
$79.3B
$57.3M 0.19%
124,767
-24,869
-17% -$11.1M
3 4
5
6 7

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William Blair Investment Management's Q3 2023 Portfolio in Review

As of Q3 2023, William Blair Investment Management held 430 positions worth $30.1B, down 3.5% from $31.2B the previous quarter. Its ten largest holdings account for 22% of the portfolio.

William Blair Investment Management's Q3 2023 filing shows 35 new, 162 increased, 197 reduced and 32 closed positions. Its largest new stake was Super Micro Computer: 5,132,780 shares worth $141M. The largest sale was Denbury Inc., an estimated $179M.

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

  • William Blair Investment Management's largest Q3 2023 buy was Super Micro Computer: 5,132,780 shares worth $141M.
  • William Blair Investment Management added most to NVIDIA in Q3 2023, an estimated $192M increase.
  • William Blair Investment Management's biggest Q3 2023 reduction was Martin Marietta Materials, cutting an estimated $141M.
  • William Blair Investment Management fully exited Denbury Inc. in Q3 2023, selling an estimated $179M.
  • William Blair Investment Management's ten largest holdings make up 22% of its $30.1B portfolio in Q3 2023.
  • William Blair Investment Management opened 35 new positions and closed 32 in Q3 2023.
  • William Blair Investment Management's portfolio value fell 3.5% quarter-over-quarter to $30.1B.

Based on William Blair Investment Management's 13F filing for Q3 2023, filed 9 Nov 2023.