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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
+771.69%
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
MSFT icon
1
Microsoft
MSFT
$3.65T
$1.19B 3.81%
3,488,085
+124,931
+4% +$39.2M
TSM icon
2
TSMC
TSM
$2.17T
$1.15B 3.7%
11,424,535
+233,387
+2% +$21.7M
GOOGL icon
3
Alphabet (Google) Class A
GOOGL
$4.43T
$680M 2.18%
5,677,106
+529,658
+10% +$61M
AMZN icon
4
Amazon
AMZN
$2.93T
$621M 1.99%
4,761,605
+262,489
+6% +$30M
LIN icon
5
Linde
LIN
$227B
$537M 1.72%
1,409,622
+55,206
+4% +$20.2M
MA icon
6
Mastercard
MA
$500B
$484M 1.55%
1,229,509
-23,198
-2% -$8.7M
CP icon
7
Canadian Pacific Kansas City
CP
$80.2B
$459M 1.47%
5,688,088
+283,869
+5% +$22.4M
MELI icon
8
Mercado Libre
MELI
$97.2B
$459M 1.47%
387,611
+21,454
+6% +$27M
BWXT icon
9
BWX Technologies
BWXT
$15.6B
$414M 1.33%
5,788,193
-563,688
-9% -$36.8M
BLDR icon
10
Builders FirstSource
BLDR
$8.14B
$368M 1.18%
2,703,849
-1,414,895
-34% -$157M
UNH icon
11
UnitedHealth
UNH
$377B
$367M 1.18%
763,781
+28,304
+4% +$13.8M
EHC icon
12
Encompass Health
EHC
$11B
$361M 1.16%
5,333,867
+26,349
+0.5% +$1.65M
CHE icon
13
Chemed
CHE
$7.06B
$303M 0.97%
560,171
-570
-0.1% -$312K
EEFT icon
14
Euronet Worldwide
EEFT
$2.86B
$300M 0.96%
2,553,693
-13,724
-0.5% -$1.53M
CCK icon
15
Crown Holdings
CCK
$13.3B
$288M 0.92%
3,312,907
+447,606
+16% +$36.8M
GTLS
16
DELISTED
Chart Industries
GTLS
$285M 0.91%
1,781,064
-1,660
-0.1% -$212K
MMSI icon
17
Merit Medical Systems
MMSI
$5.21B
$282M 0.91%
3,375,272
-20,560
-0.6% -$1.67M
INSP icon
18
Inspire Medical Systems
INSP
$1.75B
$271M 0.87%
836,162
-528
-0.1% -$151K
CWST icon
19
Casella Waste Systems
CWST
$5.71B
$271M 0.87%
2,992,199
+54,316
+2% +$4.85M
AXON
20
Axon Enterprise
AXON
$48.8B
$266M 0.85%
1,363,889
-43,156
-3% -$8.94M
ICLR icon
21
Icon
ICLR
$12.6B
$265M 0.85%
1,059,656
-287,967
-21% -$61.1M
CCJ icon
22
Cameco
CCJ
$41.3B
$263M 0.84%
8,399,311
-1,841,122
-18% -$51.8M
ACN icon
23
Accenture
ACN
$104B
$248M 0.8%
803,488
+117,860
+17% +$34.2M
BCO icon
24
Brink's
BCO
$4.84B
$246M 0.79%
3,628,323
-662,925
-15% -$44.4M
ACHC icon
25
Acadia Healthcare
ACHC
$3B
$243M 0.78%
3,048,854
+504,572
+20% +$36.5M
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.