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William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $30.3B
1-Year Est. Return 33.75%
This Fund
S&P 500
This Quarter Est. Return
+9.84%
1 Year Est. Return
+33.75%
3 Year Est. Return
+108.55%
5 Year Est. Return
+126.9%
10 Year Est. Return
+788.31%
AUM
$31.2B
AUM Growth
+$2.49B
Cap. Flow
+$357M
Cap. Flow %
1.14%
Top 10 Hldgs %
20.4%
Holding
426
New
33
Increased
232
Reduced
127
Closed
31

Top Buys

Rank Stock Value
1
TECH icon
Bio-Techne
TECH
+$186M
2
TYL icon
Tyler Technologies
TYL
+$171M
3
NVDA icon
NVIDIA
NVDA
+$167M
4
NOW icon
ServiceNow
NOW
+$128M
5
BFAM icon
Bright Horizons
BFAM
+$109M

Top Sells

Rank Stock Value
1
PD icon
PagerDuty
PD
+$171M
2
BLDR icon
Builders FirstSource
BLDR
+$157M
3
PYPL icon
PayPal
PYPL
+$135M
4
NATI
National Instruments Corp
NATI
+$122M
5
LECO icon
Lincoln Electric
LECO
+$116M

Sector Composition

Rank Sector Weight
1 Technology 25.63%
2 Industrials 16.13%
3 Healthcare 15.71%
4 Consumer Discretionary 14.7%
5 Financials 8.24%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MLM icon
26
Martin Marietta Materials
MLM
$33.2B
$240M 0.77%
520,066
+99,248
+24% +$39.1M
RACE icon
27
Ferrari
RACE
$72.1B
$237M 0.76%
729,027
-20,734
-3% -$6.04M
MZTI
28
The Marzetti Company
MZTI
$3.15B
$234M 0.75%
1,162,052
-853
-0.1% -$173K
NVDA icon
29
NVIDIA
NVDA
$5.27T
$232M 0.74%
5,472,900
+5,026,580
+1,126% +$167M
PEN icon
30
Penumbra
PEN
$12.8B
$231M 0.74%
670,286
-270,446
-29% -$83M
LYV icon
31
Live Nation Entertainment
LYV
$42.6B
$230M 0.74%
2,527,377
+29,214
+1% +$2.28M
ZTS icon
32
Zoetis
ZTS
$31B
$222M 0.71%
1,289,459
-109,759
-8% -$19M
FTI icon
33
TechnipFMC
FTI
$29.5B
$219M 0.7%
13,172,946
-1,798,667
-12% -$25.4M
EYE icon
34
National Vision
EYE
$1.78B
$215M 0.69%
8,837,615
+176,894
+2% +$4.11M
HEI.A icon
35
HEICO Corp Class A
HEI.A
$36.9B
$214M 0.69%
1,522,442
+196,086
+15% +$26.3M
LULU icon
36
lululemon athletica
LULU
$14.3B
$214M 0.69%
564,707
-3,050
-0.5% -$1.13M
CRM icon
37
Salesforce
CRM
$161B
$212M 0.68%
1,001,261
-46,359
-4% -$9.46M
NICE icon
38
Nice
NICE
$5.96B
$209M 0.67%
1,011,603
-119,421
-11% -$24.6M
POOL icon
39
Pool Corp
POOL
$7.32B
$205M 0.66%
546,921
+10,310
+2% +$3.52M
PANW icon
40
Palo Alto Networks
PANW
$312B
$204M 0.65%
1,598,326
+265,268
+20% +$27.6M
CPRT icon
41
Copart
CPRT
$27.2B
$202M 0.65%
4,431,298
-1,804,656
-29% -$74.8M
COST icon
42
Costco
COST
$419B
$202M 0.65%
374,749
+13,246
+4% +$6.7M
NKE icon
43
Nike
NKE
$61.2B
$202M 0.65%
1,825,990
+47,515
+3% +$5.56M
CF icon
44
CF Industries
CF
$17.8B
$201M 0.64%
2,895,633
+1,236,234
+74% +$86.2M
DT icon
45
Dynatrace
DT
$14.3B
$197M 0.63%
3,824,276
-855,931
-18% -$40.1M
AMD icon
46
Advanced Micro Devices
AMD
$774B
$195M 0.63%
1,714,962
-204,641
-11% -$21.3M
HDB icon
47
HDFC Bank
HDB
$120B
$193M 0.62%
5,546,514
+183,872
+3% +$6.2M
CSGP icon
48
CoStar Group
CSGP
$12.6B
$192M 0.62%
2,156,525
-338,863
-14% -$26.2M
TECH icon
49
Bio-Techne
TECH
$11.2B
$189M 0.61%
+2,314,458
New +$186M
MRCY icon
50
Mercury Systems
MRCY
$6.56B
$186M 0.6%
5,372,657
+24,299
+0.5% +$1.04M
1
2
3 4 5

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William Blair Investment Management's Q2 2023 Portfolio in Review

As of Q2 2023, William Blair Investment Management held 426 positions worth $31.2B, up 8.7% from $28.7B the previous quarter. Its ten largest holdings account for 20% of the portfolio.

William Blair Investment Management's Q2 2023 filing shows 33 new, 232 increased, 127 reduced and 31 closed positions. Its largest new stake was Bio-Techne: 2,314,458 shares worth $189M. The largest sale was PagerDuty, an estimated $171M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 25% a quarter earlier, followed by Industrials and Healthcare.

  • William Blair Investment Management's largest Q2 2023 buy was Bio-Techne: 2,314,458 shares worth $189M.
  • William Blair Investment Management added most to NVIDIA in Q2 2023, an estimated $167M increase.
  • William Blair Investment Management's biggest Q2 2023 reduction was Builders FirstSource, cutting an estimated $157M.
  • William Blair Investment Management fully exited PagerDuty in Q2 2023, selling an estimated $171M.
  • William Blair Investment Management's ten largest holdings make up 20% of its $31.2B portfolio in Q2 2023.
  • William Blair Investment Management opened 33 new positions and closed 31 in Q2 2023.
  • William Blair Investment Management's portfolio value rose 8.7% quarter-over-quarter to $31.2B.

Based on William Blair Investment Management's 13F filing for Q2 2023, filed 11 Aug 2023.