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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
TENB icon
76
Tenable Holdings
TENB
$4.06B
$136M 0.45%
3,028,310
+810,831
+37% +$36.4M
TREX icon
77
Trex
TREX
$5.04B
$131M 0.43%
2,118,798
-486,399
-19% -$33.4M
FOLD
78
DELISTED
Amicus Therapeutics
FOLD
$126M 0.42%
10,376,763
+8,070,098
+350% +$104M
FSV icon
79
FirstService
FSV
$6.21B
$126M 0.42%
864,283
-82,680
-9% -$12.6M
CSGP icon
80
CoStar Group
CSGP
$12.3B
$124M 0.41%
1,611,730
-544,795
-25% -$45.1M
LSCC icon
81
Lattice Semiconductor
LSCC
$18.5B
$123M 0.41%
+1,426,703
New +$129M
CGNX icon
82
Cognex
CGNX
$10.3B
$117M 0.39%
2,768,291
+4,093
+0.1% +$201K
PODD icon
83
Insulet
PODD
$10B
$117M 0.39%
732,923
+433,884
+145% +$97.2M
NKE icon
84
Nike
NKE
$60.3B
$117M 0.39%
1,221,081
-604,909
-33% -$62.2M
GMED icon
85
Globus Medical
GMED
$11.4B
$115M 0.38%
2,316,372
+43,187
+2% +$2.41M
EXP icon
86
Eagle Materials
EXP
$6.48B
$111M 0.37%
666,874
+487,454
+272% +$88.6M
WSC icon
87
WillScot Mobile Mini Holdings
WSC
$4.09B
$110M 0.37%
2,644,294
+64,020
+2% +$2.82M
SBUX icon
88
Starbucks
SBUX
$123B
$110M 0.37%
1,203,520
+118,262
+11% +$11.6M
SHLS icon
89
Shoals Technologies Group
SHLS
$1.39B
$108M 0.36%
5,934,781
+1,190,411
+25% +$26.5M
INSM icon
90
Insmed
INSM
$29B
$107M 0.36%
4,241,935
-43,984
-1% -$1.01M
CERT icon
91
Certara
CERT
$1.23B
$104M 0.35%
7,150,914
+77,805
+1% +$1.31M
KOS icon
92
Kosmos Energy
KOS
$1.49B
$104M 0.35%
12,699,004
+2,559,942
+25% +$18.1M
EEFT icon
93
Euronet Worldwide
EEFT
$2.65B
$102M 0.34%
1,279,053
-1,274,640
-50% -$118M
PXD
94
DELISTED
Pioneer Natural Resource Co.
PXD
$101M 0.34%
440,522
+112,261
+34% +$25.6M
FLYW icon
95
Flywire
FLYW
$2.12B
$100M 0.33%
+3,146,473
New +$101M
VRNS icon
96
Varonis Systems
VRNS
$4.82B
$99.3M 0.33%
3,252,160
+205,105
+7% +$6.06M
EG icon
97
Everest Group
EG
$13.9B
$98M 0.33%
+263,788
New +$95.7M
SPSC icon
98
SPS Commerce
SPSC
$2.73B
$97.2M 0.32%
569,458
+90,964
+19% +$16.1M
ENTG icon
99
Entegris
ENTG
$24.7B
$96.4M 0.32%
1,026,750
-576,739
-36% -$57.7M
BLD
100
DELISTED
TopBuild
BLD
$95.1M 0.32%
+378,168
New +$104M
2 3
4
5 6

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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.