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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+10.3%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+512.03%
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
AAPL icon
1
Apple
AAPL
$4.99T
$1.06B 4.25%
6,454,722
-90,623
-1% -$13.4M
MSFT icon
2
Microsoft
MSFT
$2.93T
$1.06B 4.22%
3,667,757
-14,368
-0.4% -$3.66M
IDXX icon
3
Idexx Laboratories
IDXX
$44.8B
$605M 2.42%
1,209,194
+3,437
+0.3% +$1.64M
AMZN icon
4
Amazon
AMZN
$2.46T
$580M 2.32%
5,613,100
+71,959
+1% +$6.95M
DXCM icon
5
DexCom
DXCM
$29.3B
$506M 2.02%
4,356,451
-64,976
-1% -$7.27M
V icon
6
Visa
V
$707B
$504M 2.01%
2,237,248
-26,895
-1% -$5.99M
MA icon
7
Mastercard
MA
$501B
$438M 1.75%
1,205,887
+4,646
+0.4% +$1.69M
DHR icon
8
Danaher
DHR
$141B
$414M 1.65%
1,852,583
+6,983
+0.4% +$1.59M
ZTS icon
9
Zoetis
ZTS
$32.9B
$392M 1.57%
2,354,899
+15,331
+0.7% +$2.51M
GOOG icon
10
Alphabet (Google) Class C
GOOG
$4.07T
$367M 1.46%
3,526,214
-561,237
-14% -$54.2M
WDAY icon
11
Workday
WDAY
$41B
$326M 1.3%
1,577,394
+28,038
+2% +$5.1M
SPY icon
12
State Street SPDR S&P 500 ETF Trust
SPY
$777B
$295M 1.18%
720,117
+9,217
+1% +$3.68M
VEEV icon
13
Veeva Systems
VEEV
$33.8B
$276M 1.1%
1,504,262
-15,119
-1% -$2.58M
SBUX icon
14
Starbucks
SBUX
$118B
$275M 1.1%
2,642,926
+44,448
+2% +$4.63M
JPM icon
15
JPMorgan Chase
JPM
$931B
$271M 1.08%
2,077,818
+23,455
+1% +$3.21M
CSGP icon
16
CoStar Group
CSGP
$11.9B
$259M 1.03%
3,755,033
+44,732
+1% +$3.3M
ADBE icon
17
Adobe
ADBE
$104B
$253M 1.01%
656,893
+21,340
+3% +$7.58M
SYK icon
18
Stryker
SYK
$134B
$250M 1%
875,045
-411
-0% -$109K
GOOGL icon
19
Alphabet (Google) Class A
GOOGL
$4.09T
$249M 1%
2,403,370
-185,702
-7% -$17.8M
COST icon
20
Costco
COST
$431B
$248M 0.99%
499,350
+25,044
+5% +$12.3M
POOL icon
21
Pool Corp
POOL
$7.04B
$248M 0.99%
723,127
+33,530
+5% +$11.9M
WSO icon
22
Watsco Inc
WSO
$13B
$232M 0.93%
729,870
+20,318
+3% +$5.97M
AON icon
23
Aon
AON
$80.1B
$229M 0.91%
726,171
-33,774
-4% -$10.5M
FISV
24
Fiserv Inc
FISV
$29.5B
$225M 0.9%
1,993,591
+13,185
+0.7% +$1.45M
PGR icon
25
Progressive
PGR
$129B
$210M 0.84%
1,467,257
+252,670
+21% +$34.8M
1
2 3 4 5

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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.