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William Blair & Company

William Blair & Company Portfolio holdings

AUM $38.4B
1-Year Est. Return 25.71%
This Fund
S&P 500
This Quarter Est. Return
+10.3%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$25B
AUM Growth
+$2.04B
Cap. Flow
+$116M
Cap. Flow %
0.46%
Top 10 Hldgs %
23.68%
Holding
1,879
New
69
Increased
680
Reduced
748
Closed
78

Top Buys

Rank Stock Value
1
NEOG icon
Neogen
NEOG
+$45.2M
2
PGR icon
Progressive
PGR
+$34.8M
3
TOST icon
Toast
TOST
+$33.8M
4
PWSC
PowerSchool Holdings, Inc.
PWSC
+$33.4M
5
UBER icon
Uber
UBER
+$30.4M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$54.2M
2
LULU icon
lululemon athletica
LULU
+$53.4M
3
PYPL icon
PayPal
PYPL
+$45.8M
4
BAH icon
Booz Allen Hamilton
BAH
+$20.2M
5
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$17.8M

Sector Composition

Rank Sector Weight
1 Technology 24.61%
2 Healthcare 19.42%
3 Financials 11.75%
4 Industrials 11.37%
5 Consumer Discretionary 8.4%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AMP icon
326
Ameriprise Financial
AMP
$49.9B
$8.8M 0.04%
28,723
+574
+2% +$188K
SITE icon
327
SiteOne Landscape Supply
SITE
$4.22B
$8.72M 0.03%
63,691
-333
-0.5% -$46.9K
SLB icon
328
SLB Ltd
SLB
$78.1B
$8.67M 0.03%
176,661
+40,231
+29% +$2.14M
CB icon
329
Chubb
CB
$132B
$8.54M 0.03%
43,976
+218
+0.5% +$45.8K
TECH icon
330
Bio-Techne
TECH
$11.3B
$8.51M 0.03%
114,661
+353
+0.3% +$27.2K
STKL
331
DELISTED
SunOpta
STKL
$8.47M 0.03%
1,099,613
-1,132
-0.1% -$9.06K
WM icon
332
Waste Management
WM
$90.5B
$8.46M 0.03%
51,874
+3,375
+7% +$517K
MRVI icon
333
Maravai LifeSciences
MRVI
$861M
$8.46M 0.03%
604,044
-265,277
-31% -$3.81M
OPCH icon
334
Option Care Health
OPCH
$3.57B
$8.46M 0.03%
266,219
-5,917
-2% -$177K
EEM icon
335
iShares MSCI Emerging Markets ETF
EEM
$30.4B
$8.43M 0.03%
213,758
+58,949
+38% +$2.34M
ADI icon
336
Analog Devices
ADI
$187B
$8.41M 0.03%
42,645
+2,390
+6% +$428K
APPF icon
337
AppFolio
APPF
$6.97B
$8.38M 0.03%
67,306
-635
-0.9% -$76.6K
MRCY icon
338
Mercury Systems
MRCY
$6.7B
$8.37M 0.03%
163,808
-7,908
-5% -$400K
GLW icon
339
Corning
GLW
$144B
$8.32M 0.03%
235,691
-496
-0.2% -$17.3K
IVW icon
340
iShares S&P 500 Growth ETF
IVW
$77.3B
$8.3M 0.03%
129,842
-6,913
-5% -$423K
ILMN icon
341
Illumina
ILMN
$29.1B
$8.24M 0.03%
36,423
-2,981
-8% -$610K
TAN icon
342
Invesco Solar ETF
TAN
$1.37B
$8.23M 0.03%
106,047
+1,366
+1% +$105K
ETN icon
343
Eaton
ETN
$179B
$8.21M 0.03%
47,891
+1,713
+4% +$285K
NVS icon
344
Novartis
NVS
$290B
$8.17M 0.03%
88,764
-1,956
-2% -$171K
XBI icon
345
State Street SPDR S&P Biotech ETF
XBI
$10.5B
$8.16M 0.03%
107,112
-402
-0.4% -$33.4K
VB icon
346
Vanguard Morningstar Small-Cap ETF
VB
$83B
$8.16M 0.03%
43,055
+7,838
+22% +$1.52M
WPM icon
347
Wheaton Precious Metals
WPM
$61.3B
$8.14M 0.03%
169,014
-8,208
-5% -$359K
HSY icon
348
Hershey
HSY
$37B
$7.95M 0.03%
31,253
-1,679
-5% -$394K
CBOE icon
349
Cboe Global Markets
CBOE
$30.4B
$7.93M 0.03%
59,078
+706
+1% +$88.6K
C icon
350
Citigroup
C
$231B
$7.93M 0.03%
169,048
-47,972
-22% -$2.35M
12 13
14
15 16

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William Blair & Company's Q1 2023 Portfolio in Review

As of Q1 2023, William Blair & Company held 1,879 positions worth $25B, up 8.9% from $23B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q1 2023 filing shows 69 new, 680 increased, 748 reduced and 78 closed positions. Its largest new stake was Neogen: 2,404,277 shares worth $44.5M. The largest sale was Alphabet (Google) Class C, an estimated $54.2M.

By sector, the portfolio is most concentrated in Technology at 25% of assets, up from 22% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q1 2023 buy was Neogen: 2,404,277 shares worth $44.5M.
  • William Blair & Company added most to Progressive in Q1 2023, an estimated $34.8M increase.
  • William Blair & Company's biggest Q1 2023 reduction was Alphabet (Google) Class C, cutting an estimated $54.2M.
  • William Blair & Company fully exited Coupa Software Incorporated in Q1 2023, selling an estimated $2.65M.
  • William Blair & Company's ten largest holdings make up 24% of its $25B portfolio in Q1 2023.
  • William Blair & Company opened 69 new positions and closed 78 in Q1 2023.
  • William Blair & Company's portfolio value rose 8.9% quarter-over-quarter to $25B.

Based on William Blair & Company's 13F filing for Q1 2023, filed 12 May 2023.