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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
+9.7%
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
$27.3B
AUM Growth
+$2.26B
Cap. Flow
+$202M
Cap. Flow %
0.74%
Top 10 Hldgs %
24.36%
Holding
1,897
New
98
Increased
682
Reduced
737
Closed
88

Top Buys

Rank Stock Value
1
COST icon
Costco
COST
+$28.3M
2
ALL icon
Allstate
ALL
+$25.8M
3
ISRG icon
Intuitive Surgical
ISRG
+$19.6M
4
NEOG icon
Neogen
NEOG
+$17.4M
5
DV icon
DoubleVerify
DV
+$17.3M

Top Sells

Rank Stock Value
1
NBIX icon
Neurocrine Biosciences
NBIX
+$29.1M
2
PLNT icon
Planet Fitness
PLNT
+$20.4M
3
ABNB icon
Airbnb
ABNB
+$17.1M
4
IBM icon
IBM
IBM
+$14.8M
5
XMTR icon
Xometry
XMTR
+$10.8M

Sector Composition

Rank Sector Weight
1 Technology 25.59%
2 Healthcare 18.44%
3 Industrials 11.64%
4 Financials 11.51%
5 Consumer Discretionary 8.51%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MSFT icon
1
Microsoft
MSFT
$2.96T
$1.25B 4.59%
3,676,873
+9,116
+0.2% +$2.86M
AAPL icon
2
Apple
AAPL
$5.05T
$1.25B 4.59%
6,455,023
+301
+0% +$52.4K
AMZN icon
3
Amazon
AMZN
$2.5T
$743M 2.72%
5,700,188
+87,088
+2% +$9.95M
IDXX icon
4
Idexx Laboratories
IDXX
$44.9B
$599M 2.19%
1,192,133
-17,061
-1% -$8.18M
DXCM icon
5
DexCom
DXCM
$29.3B
$570M 2.09%
4,433,499
+77,048
+2% +$9.32M
V icon
6
Visa
V
$704B
$524M 1.92%
2,206,385
-30,863
-1% -$7.06M
MA icon
7
Mastercard
MA
$500B
$472M 1.73%
1,199,917
-5,970
-0.5% -$2.24M
GOOG icon
8
Alphabet (Google) Class C
GOOG
$4.17T
$426M 1.56%
3,524,323
-1,891
-0.1% -$219K
ZTS icon
9
Zoetis
ZTS
$32.5B
$413M 1.51%
2,395,591
+40,692
+2% +$7.04M
DHR icon
10
Danaher
DHR
$139B
$399M 1.46%
1,874,874
+22,291
+1% +$4.72M
WDAY icon
11
Workday
WDAY
$41.8B
$355M 1.3%
1,573,304
-4,090
-0.3% -$819K
CSGP icon
12
CoStar Group
CSGP
$12.3B
$351M 1.28%
3,939,827
+184,794
+5% +$14.3M
ADBE icon
13
Adobe
ADBE
$105B
$328M 1.2%
671,295
+14,402
+2% +$5.8M
SPY icon
14
State Street SPDR S&P 500 ETF Trust
SPY
$783B
$318M 1.17%
717,731
-2,386
-0.3% -$1M
JPM icon
15
JPMorgan Chase
JPM
$928B
$310M 1.13%
2,130,031
+52,213
+3% +$7.18M
COST icon
16
Costco
COST
$431B
$299M 1.1%
555,279
+55,929
+11% +$28.3M
GOOGL icon
17
Alphabet (Google) Class A
GOOGL
$4.17T
$297M 1.09%
2,484,521
+81,151
+3% +$9.34M
WSO icon
18
Watsco Inc
WSO
$12.9B
$292M 1.07%
765,479
+35,609
+5% +$12.1M
VEEV icon
19
Veeva Systems
VEEV
$33.9B
$287M 1.05%
1,453,412
-50,850
-3% -$9.27M
POOL icon
20
Pool Corp
POOL
$6.95B
$287M 1.05%
765,318
+42,191
+6% +$14.4M
SYK icon
21
Stryker
SYK
$135B
$267M 0.98%
875,159
+114
+0% +$32.9K
SBUX icon
22
Starbucks
SBUX
$119B
$256M 0.94%
2,585,852
-57,074
-2% -$5.92M
FISV
23
Fiserv Inc
FISV
$29.8B
$251M 0.92%
1,989,298
-4,293
-0.2% -$505K
AON icon
24
Aon
AON
$80.6B
$248M 0.91%
719,184
-6,987
-1% -$2.27M
CPRT icon
25
Copart
CPRT
$28.9B
$244M 0.89%
5,339,466
-112,344
-2% -$4.66M
1
2 3 4 5

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William Blair & Company's Q2 2023 Portfolio in Review

As of Q2 2023, William Blair & Company held 1,897 positions worth $27.3B, up 9% from $25B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q2 2023 filing shows 98 new, 682 increased, 737 reduced and 88 closed positions. Its largest new stake was Innovator US Equity Power Buffer ETF April: 112,249 shares worth $3.47M. The largest sale was Neurocrine Biosciences, an estimated $29.1M.

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

  • William Blair & Company's largest Q2 2023 buy was Innovator US Equity Power Buffer ETF April: 112,249 shares worth $3.47M.
  • William Blair & Company added most to Costco in Q2 2023, an estimated $28.3M increase.
  • William Blair & Company's biggest Q2 2023 reduction was Neurocrine Biosciences, cutting an estimated $29.1M.
  • William Blair & Company fully exited ABB Ltd in Q2 2023, selling an estimated $7.21M.
  • William Blair & Company's ten largest holdings make up 24% of its $27.3B portfolio in Q2 2023.
  • William Blair & Company opened 98 new positions and closed 88 in Q2 2023.
  • William Blair & Company's portfolio value rose 9% quarter-over-quarter to $27.3B.

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