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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
GRMN
1001
Garmin
GRMN
$60.2B
$638K ﹤0.01%
4,965
-287
-5% -$33.3K
CWST icon
1002
Casella Waste Systems
CWST
$5.79B
$638K ﹤0.01%
7,467
– –
SCHE icon
1003
Schwab Emerging Markets Equity ETF
SCHE
$12.9B
$635K ﹤0.01%
25,605
+4,809
+23% +$116K
IEX icon
1004
IDEX
IEX
$17.6B
$634K ﹤0.01%
2,921
-480
-14% -$96.8K
SLF icon
1005
Sun Life Financial
SLF
$44.8B
$633K ﹤0.01%
12,202
+97
+0.8% +$4.77K
VNOM icon
1006
Viper Energy
VNOM
$14.8B
$631K ﹤0.01%
20,100
– –
APPN icon
1007
Appian
APPN
$2.65B
$631K ﹤0.01%
16,748
+300
+2% +$11.7K
BLD
1008
DELISTED
TopBuild
BLD
$631K ﹤0.01%
1,685
+20
+1% +$5.73K
LII icon
1009
Lennox International
LII
$14.5B
$629K ﹤0.01%
1,406
+12
+0.9% +$4.79K
PSLV icon
1010
Sprott Physical Silver Trust
PSLV
$13.3B
$629K ﹤0.01%
77,800
-11,329
-13% -$89.5K
JBL icon
1011
Jabil
JBL
$38.8B
$627K ﹤0.01%
4,921
-37
-0.7% -$4.71K
MAS icon
1012
Masco
MAS
$14.7B
$626K ﹤0.01%
9,351
-2,273
-20% -$132K
VTR icon
1013
Ventas
VTR
$46.3B
$626K ﹤0.01%
12,560
+1,178
+10% +$52.8K
VRNS icon
1014
Varonis Systems
VRNS
$5.26B
$625K ﹤0.01%
13,803
+1,033
+8% +$38.9K
IGV icon
1015
iShares Expanded Tech-Software Sector ETF
IGV
$15.2B
$621K ﹤0.01%
7,655
-315
-4% -$23.3K
IYH icon
1016
iShares US Healthcare ETF
IYH
$3.77B
$616K ﹤0.01%
10,760
-735
-6% -$40K
WRK
1017
DELISTED
WestRock Company
WRK
$613K ﹤0.01%
14,768
-2,196
-13% -$84.5K
BELFB
1018
Bel Fuse Inc Class B
BELFB
$4.13B
$611K ﹤0.01%
9,150
– –
BPMC
1019
DELISTED
Blueprint Medicines
BPMC
$610K ﹤0.01%
6,616
+1,249
+23% +$80.9K
GOVT icon
1020
iShares US Treasury Bond ETF
GOVT
$43.8B
$610K ﹤0.01%
26,475
-257
-1% -$5.72K
DECK icon
1021
Deckers Outdoor
DECK
$12.7B
$606K ﹤0.01%
5,436
-294
-5% -$29.9K
IYF icon
1022
iShares US Financials ETF
IYF
$4.44B
$604K ﹤0.01%
7,069
-96
-1% -$7.48K
CTRA
1023
DELISTED
Coterra Energy
CTRA
$600K ﹤0.01%
23,494
-2,620
-10% -$70.2K
EUSA icon
1024
iShares MSCI USA Equal Weighted ETF
EUSA
$1.96B
$596K ﹤0.01%
7,054
-115
-2% -$8.89K
S icon
1025
SentinelOne
S
$8.17B
$592K ﹤0.01%
21,557
-4,920
-19% -$95.3K
39 40
41
42 43

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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.