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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
COST icon
26
Costco
COST
$419B
$247M 0.82%
437,501
+62,752
+17% +$34.6M
INTU icon
27
Intuit
INTU
$90.5B
$238M 0.79%
466,012
+71,704
+18% +$36.3M
CWST icon
28
Casella Waste Systems
CWST
$5.86B
$233M 0.77%
3,047,265
+55,066
+2% +$4.51M
ISRG icon
29
Intuitive Surgical
ISRG
$141B
$223M 0.74%
763,187
+220,580
+41% +$68.9M
LYV icon
30
Live Nation Entertainment
LYV
$42.9B
$222M 0.74%
2,671,703
+144,326
+6% +$12.6M
POOL icon
31
Pool Corp
POOL
$7.16B
$216M 0.72%
606,678
+59,757
+11% +$21.7M
MZTI
32
The Marzetti Company
MZTI
$3.14B
$216M 0.72%
1,307,612
+145,560
+13% +$26.2M
ACHC icon
33
Acadia Healthcare
ACHC
$2.92B
$215M 0.71%
3,058,916
+10,062
+0.3% +$752K
BLDR icon
34
Builders FirstSource
BLDR
$7.68B
$215M 0.71%
1,724,774
-979,075
-36% -$135M
ZTS icon
35
Zoetis
ZTS
$29.9B
$214M 0.71%
1,228,252
-61,207
-5% -$11.1M
GWRE icon
36
Guidewire Software
GWRE
$14.4B
$212M 0.7%
2,350,823
-85,637
-4% -$7.15M
NFE icon
37
New Fortress Energy
NFE
$94.5M
$206M 0.68%
6,275,847
+674,685
+12% +$19.8M
CCJ icon
38
Cameco
CCJ
$43B
$195M 0.65%
4,912,019
-3,487,292
-42% -$123M
NOW icon
39
ServiceNow
NOW
$128B
$194M 0.65%
1,738,435
+456,355
+36% +$52.1M
HQY icon
40
HealthEquity
HQY
$8.7B
$193M 0.64%
2,645,244
-147,496
-5% -$9.96M
PANW icon
41
Palo Alto Networks
PANW
$314B
$191M 0.63%
1,627,000
+28,674
+2% +$3.39M
CMG icon
42
Chipotle Mexican Grill
CMG
$41.5B
$187M 0.62%
5,106,750
+1,066,750
+26% +$41.6M
TW icon
43
Tradeweb Markets
TW
$21.9B
$183M 0.61%
2,277,162
+503,401
+28% +$40.1M
MNST icon
44
Monster Beverage
MNST
$89.2B
$182M 0.6%
6,863,570
+2,614,964
+62% +$74.3M
FRPT icon
45
Freshpet
FRPT
$3.45B
$181M 0.6%
2,740,708
+110,383
+4% +$7.92M
RACE icon
46
Ferrari
RACE
$71.2B
$180M 0.6%
610,429
-118,598
-16% -$36.8M
DT icon
47
Dynatrace
DT
$14.3B
$179M 0.6%
3,835,232
+10,956
+0.3% +$538K
HEI.A icon
48
HEICO Corp Class A
HEI.A
$37.3B
$173M 0.58%
1,340,018
-182,424
-12% -$24.7M
NICE icon
49
Nice
NICE
$5.75B
$173M 0.57%
1,017,406
+5,803
+0.6% +$1.15M
APO icon
50
Apollo Global Management
APO
$81.5B
$171M 0.57%
1,902,972
+191,881
+11% +$16.1M
1
2
3 4 5

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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.