We are live on ! Find out more
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
+14.12%
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
$29.3B
AUM Growth
+$3.27B
Cap. Flow
-$91M
Cap. Flow %
-0.31%
Top 10 Hldgs %
24.41%
Holding
1,872
New
83
Increased
624
Reduced
816
Closed
87

Top Buys

Rank Stock Value
1
GWRE icon
Guidewire Software
GWRE
+$37.5M
2
SCHW
Charles Schwab
SCHW
+$37.1M
3
VLTO icon
Veralto
VLTO
+$17.1M
4
VRTX icon
Vertex Pharmaceuticals
VRTX
+$16.7M
5
CSGP icon
CoStar Group
CSGP
+$16.3M

Top Sells

Rank Stock Value
1
DHR icon
Danaher
DHR
+$37.6M
2
IRTC icon
iRhythm Holdings
IRTC
+$26.7M
3
DE icon
Deere & Co
DE
+$22.6M
4
TOST icon
Toast
TOST
+$21.2M
5
KO icon
Coca-Cola
KO
+$20.3M

Sector Composition

Rank Sector Weight
1 Technology 26.35%
2 Healthcare 17.08%
3 Financials 12.09%
4 Industrials 11.7%
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
$1.38B 4.7%
3,664,426
+19,719
+0.5% +$7.02M
AAPL icon
2
Apple
AAPL
$4.99T
$1.19B 4.07%
6,196,169
-53,625
-0.9% -$9.9M
AMZN icon
3
Amazon
AMZN
$2.45T
$886M 3.02%
5,830,039
+65,935
+1% +$9.24M
IDXX icon
4
Idexx Laboratories
IDXX
$44.9B
$667M 2.27%
1,201,251
+1,306
+0.1% +$613K
V icon
5
Visa
V
$707B
$571M 1.95%
2,192,475
-12,500
-0.6% -$3.08M
DXCM icon
6
DexCom
DXCM
$29.3B
$554M 1.89%
4,468,004
-39,149
-0.9% -$4M
MA icon
7
Mastercard
MA
$501B
$507M 1.73%
1,189,652
-12,409
-1% -$4.99M
GOOG icon
8
Alphabet (Google) Class C
GOOG
$4.08T
$492M 1.68%
3,489,464
-6,321
-0.2% -$858K
ZTS icon
9
Zoetis
ZTS
$33B
$486M 1.66%
2,463,357
+34,848
+1% +$6.17M
WDAY icon
10
Workday
WDAY
$41B
$429M 1.46%
1,554,416
-24,178
-2% -$5.76M
ADBE icon
11
Adobe
ADBE
$104B
$406M 1.38%
680,445
-1,764
-0.3% -$1.02M
DHR icon
12
Danaher
DHR
$141B
$399M 1.36%
1,724,761
-176,488
-9% -$37.6M
CSGP icon
13
CoStar Group
CSGP
$12B
$384M 1.31%
4,392,978
+201,969
+5% +$16.3M
COST icon
14
Costco
COST
$431B
$379M 1.29%
573,586
+10,759
+2% +$6.38M
JPM icon
15
JPMorgan Chase
JPM
$931B
$377M 1.28%
2,215,395
+41,885
+2% +$6.35M
GOOGL icon
16
Alphabet (Google) Class A
GOOGL
$4.09T
$357M 1.22%
2,555,185
+67,980
+3% +$9.13M
SPY icon
17
State Street SPDR S&P 500 ETF Trust
SPY
$777B
$348M 1.18%
731,206
+26,277
+4% +$11.7M
WSO icon
18
Watsco Inc
WSO
$12.9B
$332M 1.13%
775,524
+5,048
+0.7% +$1.96M
POOL icon
19
Pool Corp
POOL
$7.04B
$317M 1.08%
796,010
+18,303
+2% +$6.42M
VEEV icon
20
Veeva Systems
VEEV
$33.8B
$281M 0.96%
1,460,417
-5,704
-0.4% -$1.07M
FISV
21
Fiserv Inc
FISV
$29.6B
$275M 0.94%
2,067,289
+93,195
+5% +$11.4M
INTU icon
22
Intuit
INTU
$90.3B
$271M 0.92%
433,394
-4,169
-1% -$2.3M
SYK icon
23
Stryker
SYK
$134B
$264M 0.9%
882,485
+4,950
+0.6% +$1.39M
CPRT icon
24
Copart
CPRT
$28.9B
$255M 0.87%
5,200,516
-94,763
-2% -$4.48M
HD icon
25
Home Depot
HD
$339B
$242M 0.83%
699,460
+12,579
+2% +$3.9M
1
2 3 4 5

Similar funds

SAM
Storebrand Asset Management Lysaker, Norway $34.8B AUM 25.49% 1-Year Est. Return
Daiwa Securities Group
Daiwa Securities Group Tokyo, Japan $34.8B AUM 20.7% 1-Year Est. Return
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $34.7B AUM 29.45% 1-Year Est. Return
VIA
Vanguard Investments Australia Victoria, Australia $34.6B AUM
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Pacer Advisors
Pacer Advisors Malvern, Pennsylvania $35.6B AUM 18.19% 1-Year Est. Return
Parnassus Investments
Parnassus Investments San Francisco, California $34.1B AUM 20.22% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return

William Blair & Company's Q4 2023 Portfolio in Review

As of Q4 2023, William Blair & Company held 1,872 positions worth $29.3B, up 13% from $26.1B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q4 2023 filing shows 83 new, 624 increased, 816 reduced and 87 closed positions. Its largest new stake was Veralto: 229,539 shares worth $18.9M. The largest sale was Danaher, an estimated $37.6M.

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

  • William Blair & Company's largest Q4 2023 buy was Veralto: 229,539 shares worth $18.9M.
  • William Blair & Company added most to Guidewire Software in Q4 2023, an estimated $37.5M increase.
  • William Blair & Company's biggest Q4 2023 reduction was Danaher, cutting an estimated $37.6M.
  • William Blair & Company fully exited Seagen Inc. Common Stock in Q4 2023, selling an estimated $13.8M.
  • William Blair & Company's ten largest holdings make up 24% of its $29.3B portfolio in Q4 2023.
  • William Blair & Company opened 83 new positions and closed 87 in Q4 2023.
  • William Blair & Company's portfolio value rose 13% quarter-over-quarter to $29.3B.

Based on William Blair & Company's 13F filing for Q4 2023, filed 12 Feb 2024.