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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
+10.07%
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
$31.8B
AUM Growth
+$2.49B
Cap. Flow
+$139M
Cap. Flow %
0.44%
Top 10 Hldgs %
23.43%
Holding
1,869
New
90
Increased
714
Reduced
722
Closed
82

Top Buys

Rank Stock Value
1
UBER icon
Uber
UBER
+$24.2M
2
IOT icon
Samsara
IOT
+$23.9M
3
PRCT icon
Procept Biorobotics
PRCT
+$20.5M
4
ISRG icon
Intuitive Surgical
ISRG
+$19.9M
5
AMZN icon
Amazon
AMZN
+$19.4M

Top Sells

Rank Stock Value
1
SPLK
Splunk Inc
SPLK
+$67.1M
2
MA icon
Mastercard
MA
+$65.4M
3
AON icon
Aon
AON
+$40.3M
4
FLYW icon
Flywire
FLYW
+$25.7M
5
DV icon
DoubleVerify
DV
+$19.5M

Sector Composition

Rank Sector Weight
1 Technology 25.75%
2 Healthcare 17.03%
3 Financials 12.35%
4 Industrials 11.88%
5 Consumer Discretionary 8.53%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MSFT icon
1
Microsoft
MSFT
$2.93T
$1.54B 4.84%
3,664,660
+234
+0% +$94.7K
AMZN icon
2
Amazon
AMZN
$2.45T
$1.07B 3.37%
5,946,441
+116,402
+2% +$19.4M
AAPL icon
3
Apple
AAPL
$4.99T
$1.05B 3.28%
6,097,120
-99,049
-2% -$18M
IDXX icon
4
Idexx Laboratories
IDXX
$44.8B
$642M 2.02%
1,189,144
-12,107
-1% -$6.62M
DXCM icon
5
DexCom
DXCM
$29.3B
$629M 1.97%
4,532,687
+64,683
+1% +$8.13M
V icon
6
Visa
V
$707B
$612M 1.92%
2,193,399
+924
+0% +$255K
GOOG icon
7
Alphabet (Google) Class C
GOOG
$4.07T
$527M 1.66%
3,464,066
-25,398
-0.7% -$3.67M
MA icon
8
Mastercard
MA
$501B
$504M 1.58%
1,046,622
-143,030
-12% -$65.4M
JPM icon
9
JPMorgan Chase
JPM
$931B
$444M 1.4%
2,218,522
+3,127
+0.1% +$564K
DHR icon
10
Danaher
DHR
$141B
$440M 1.38%
1,761,264
+36,503
+2% +$8.91M
CSGP icon
11
CoStar Group
CSGP
$11.9B
$427M 1.34%
4,419,778
+26,800
+0.6% +$2.31M
WDAY icon
12
Workday
WDAY
$41B
$419M 1.32%
1,538,010
-16,406
-1% -$4.67M
COST icon
13
Costco
COST
$431B
$417M 1.31%
569,763
-3,823
-0.7% -$2.73M
ZTS icon
14
Zoetis
ZTS
$32.9B
$412M 1.29%
2,433,034
-30,323
-1% -$5.68M
SPY icon
15
State Street SPDR S&P 500 ETF Trust
SPY
$777B
$384M 1.21%
734,315
+3,109
+0.4% +$1.55M
GOOGL icon
16
Alphabet (Google) Class A
GOOGL
$4.09T
$383M 1.2%
2,534,467
-20,718
-0.8% -$2.96M
NVDA icon
17
NVIDIA
NVDA
$4.67T
$347M 1.09%
3,836,820
+102,360
+3% +$7.42M
WSO icon
18
Watsco Inc
WSO
$13B
$342M 1.07%
792,011
+16,487
+2% +$6.62M
ADBE icon
19
Adobe
ADBE
$104B
$342M 1.07%
677,263
-3,182
-0.5% -$1.82M
POOL icon
20
Pool Corp
POOL
$7.04B
$340M 1.07%
843,650
+47,640
+6% +$18.6M
FISV
21
Fiserv Inc
FISV
$29.5B
$339M 1.06%
2,118,643
+51,354
+2% +$7.48M
VEEV icon
22
Veeva Systems
VEEV
$33.8B
$338M 1.06%
1,459,098
-1,319
-0.1% -$285K
SYK icon
23
Stryker
SYK
$134B
$332M 1.04%
926,578
+44,093
+5% +$14.8M
PGR icon
24
Progressive
PGR
$129B
$324M 1.02%
1,568,198
+63,429
+4% +$11.8M
CPRT icon
25
Copart
CPRT
$28.9B
$303M 0.95%
5,235,264
+34,748
+0.7% +$1.79M
1
2 3 4 5

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William Blair & Company's Q1 2024 Portfolio in Review

As of Q1 2024, William Blair & Company held 1,869 positions worth $31.8B, up 8.5% from $29.3B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

William Blair & Company's Q1 2024 filing shows 90 new, 714 increased, 722 reduced and 82 closed positions. Its largest new stake was Procept Biorobotics: 429,793 shares worth $21.2M. The largest sale was Splunk Inc, an estimated $67.1M.

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

  • William Blair & Company's largest Q1 2024 buy was Procept Biorobotics: 429,793 shares worth $21.2M.
  • William Blair & Company added most to Uber in Q1 2024, an estimated $24.2M increase.
  • William Blair & Company's biggest Q1 2024 reduction was Mastercard, cutting an estimated $65.4M.
  • William Blair & Company fully exited Splunk Inc in Q1 2024, selling an estimated $67.1M.
  • William Blair & Company's ten largest holdings make up 23% of its $31.8B portfolio in Q1 2024.
  • William Blair & Company opened 90 new positions and closed 82 in Q1 2024.
  • William Blair & Company's portfolio value rose 8.5% quarter-over-quarter to $31.8B.

Based on William Blair & Company's 13F filing for Q1 2024, filed 9 May 2024.