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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
+14.12%
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
$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
RKLB icon
676
Rocket Lab Corp
RKLB
$53B
$1.92M 0.01%
346,918
-95,251
-22% -$430K
IZRL icon
677
ARK Israel Innovative Technology ETF
IZRL
$139M
$1.9M 0.01%
97,490
– –
PCYO icon
678
Pure Cycle
PCYO
$277M
$1.89M 0.01%
180,507
-3,000
-2% -$29.8K
MMSI icon
679
Merit Medical Systems
MMSI
$5.48B
$1.89M 0.01%
24,848
-75
-0.3% -$5.24K
XLRE icon
680
State Street Real Estate Select Sector SPDR ETF
XLRE
$8.63B
$1.89M 0.01%
47,077
-514
-1% -$18.5K
CIBR icon
681
First Trust NASDAQ Cybersecurity ETF
CIBR
$15.7B
$1.87M 0.01%
34,795
+24,741
+246% +$1.2M
STE icon
682
Steris
STE
$23B
$1.87M 0.01%
8,493
-7,944
-48% -$1.68M
CPB icon
683
Campbell Soup
CPB
$6.89B
$1.86M 0.01%
43,129
-537
-1% -$22.1K
TD icon
684
Toronto Dominion Bank
TD
$205B
$1.85M 0.01%
28,580
+1,260
+5% +$75.5K
FICO icon
685
Fair Isaac
FICO
$22.8B
$1.85M 0.01%
1,586
-28
-2% -$28.2K
VAW icon
686
Vanguard Materials ETF
VAW
$3.07B
$1.84M 0.01%
9,710
-45
-0.5% -$7.9K
CTLT
687
DELISTED
CATALENT, INC.
CTLT
$1.83M 0.01%
40,778
-25,721
-39% -$1.04M
PRFT
688
DELISTED
Perficient Inc
PRFT
$1.82M 0.01%
27,667
-3,283
-11% -$202K
WTFC icon
689
Wintrust Financial
WTFC
$11B
$1.82M 0.01%
19,617
+26
+0.1% +$2.15K
BBJP icon
690
JPMorgan BetaBuilders Japan ETF
BBJP
$19.1B
$1.8M 0.01%
34,226
+165
+0.5% +$8.39K
FTEC icon
691
Fidelity MSCI Information Technology Index ETF
FTEC
$21.5B
$1.8M 0.01%
12,502
– –
CCRN
692
DELISTED
Cross Country Healthcare
CCRN
$1.79M 0.01%
79,194
-23,657
-23% -$513K
VGK icon
693
Vanguard FTSE Europe ETF
VGK
$31.1B
$1.79M 0.01%
27,764
-3,815
-12% -$228K
VGSH icon
694
Vanguard Short-Term Treasury ETF
VGSH
$30.2B
$1.79M 0.01%
30,636
+700
+2% +$40.5K
CALF icon
695
Pacer US Small Cap Cash Cows 100 ETF
CALF
$3.84B
$1.78M 0.01%
37,010
+21,220
+134% +$911K
SPYG icon
696
State Street SPDR Portfolio S&P 500 Growth ETF
SPYG
$55.4B
$1.77M 0.01%
27,271
-889
-3% -$54.8K
REGN icon
697
Regeneron Pharmaceuticals
REGN
$82.3B
$1.77M 0.01%
2,016
+456
+29% +$376K
AVB icon
698
AvalonBay Communities
AVB
$26.2B
$1.77M 0.01%
9,453
-313
-3% -$54.6K
SCHO icon
699
Schwab Short-Term US Treasury ETF
SCHO
$13B
$1.77M 0.01%
73,022
+15,464
+27% +$371K
MGV icon
700
Vanguard Morningstar Mega Cap Value ETF
MGV
$13.7B
$1.77M 0.01%
16,147
-172
-1% -$17.8K
26 27
28
29 30

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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.