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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
PD icon
51
PagerDuty
PD
$883M
$171M 0.59%
4,875,088
-11,525
-0.2% -$338K
CERT icon
52
Certara
CERT
$1.22B
$169M 0.59%
7,026,786
+294,183
+4% +$5.81M
NOVT icon
53
Novanta
NOVT
$6.4B
$169M 0.59%
1,059,770
+2,116
+0.2% +$325K
HQY icon
54
HealthEquity
HQY
$8.85B
$169M 0.59%
2,870,169
-116,125
-4% -$7.05M
FOXF icon
55
Fox Factory Holding Corp
FOXF
$902M
$167M 0.58%
1,375,017
-216,350
-14% -$24.8M
EYE icon
56
National Vision
EYE
$1.62B
$163M 0.57%
8,660,721
+1,754,382
+25% +$57.1M
RGEN icon
57
Repligen
RGEN
$9.4B
$153M 0.53%
911,368
+237,796
+35% +$42.4M
PODD icon
58
Insulet
PODD
$10B
$153M 0.53%
480,475
+178,874
+59% +$53M
GLOB icon
59
Globant
GLOB
$1.65B
$151M 0.53%
919,400
-207,288
-18% -$33.9M
PYPL icon
60
PayPal
PYPL
$50.2B
$151M 0.53%
1,985,507
-212,678
-10% -$16.4M
MLM icon
61
Martin Marietta Materials
MLM
$32.7B
$149M 0.52%
420,818
-81,631
-16% -$28.6M
RVLV icon
62
Revolve Group
RVLV
$1.68B
$148M 0.51%
5,616,240
+845,814
+18% +$21.8M
PLNT icon
63
Planet Fitness
PLNT
$3.66B
$144M 0.5%
1,859,864
-20,945
-1% -$1.67M
EL icon
64
Estee Lauder
EL
$31.9B
$142M 0.49%
575,126
-5,035
-0.9% -$1.28M
CRL icon
65
Charles River Laboratories
CRL
$13.7B
$140M 0.49%
695,975
-14,045
-2% -$3.18M
SBUX icon
66
Starbucks
SBUX
$123B
$140M 0.49%
1,345,440
+181,359
+16% +$18.9M
CG icon
67
Carlyle Group
CG
$17.2B
$139M 0.49%
4,488,152
+1,642,580
+58% +$54.8M
SEDG icon
68
SolarEdge
SEDG
$1.98B
$139M 0.48%
457,099
-205,194
-31% -$62.6M
CMG icon
69
Chipotle Mexican Grill
CMG
$41.3B
$134M 0.47%
3,925,300
+986,000
+34% +$31M
FRPT icon
70
Freshpet
FRPT
$3.49B
$134M 0.47%
2,024,707
+775,499
+62% +$47.6M
FSV icon
71
FirstService
FSV
$6.21B
$134M 0.47%
950,184
+9,289
+1% +$1.28M
PANW icon
72
Palo Alto Networks
PANW
$314B
$133M 0.46%
1,333,058
+293,678
+28% +$24.9M
VEEV icon
73
Veeva Systems
VEEV
$38.7B
$132M 0.46%
719,931
+94,746
+15% +$16.2M
ENTG icon
74
Entegris
ENTG
$24.6B
$132M 0.46%
1,605,853
+13,352
+0.8% +$1.08M
WMS icon
75
Advanced Drainage Systems
WMS
$10.7B
$129M 0.45%
1,536,422
+327,658
+27% +$28.8M
1 2
3
4 5

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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.