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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
MLPX icon
1376
Global X MLP & Energy Infrastructure ETF
MLPX
$3.56B
$209K ﹤0.01%
4,680
– –
IPAY icon
1377
Amplify Mobile Payments ETF
IPAY
$184M
$208K ﹤0.01%
4,485
-8
-0.2% -$326
WDFC icon
1378
WD-40
WDFC
$3.1B
$208K ﹤0.01%
+869
New +$194K
IOO icon
1379
iShares Global 100 ETF
IOO
$9.45B
$208K ﹤0.01%
2,578
-42
-2% -$3.21K
INFN
1380
DELISTED
Infinera Corporation Common Stock
INFN
$208K ﹤0.01%
43,700
+16,300
+59% +$64.1K
JMST icon
1381
JPMorgan Ultra-Short Municipal Income ETF
JMST
$7.15B
$207K ﹤0.01%
4,073
-2,200
-35% -$111K
XMMO icon
1382
Invesco S&P MidCap Momentum ETF
XMMO
$7.63B
$207K ﹤0.01%
2,300
– –
BC icon
1383
Brunswick
BC
$5.27B
$206K ﹤0.01%
+2,128
New +$169K
SNSR icon
1384
Global X Internet of Things ETF
SNSR
$224M
$206K ﹤0.01%
5,822
– –
BXP icon
1385
Boston Properties
BXP
$11B
$204K ﹤0.01%
+2,912
New +$172K
SUN icon
1386
Sunoco
SUN
$14.2B
$204K ﹤0.01%
+3,402
New +$181K
BMRC icon
1387
Bank of Marin Bancorp
BMRC
$466M
$203K ﹤0.01%
9,230
-4,000
-30% -$76.7K
NARI
1388
DELISTED
Inari Medical, Inc. Common Stock
NARI
$203K ﹤0.01%
3,130
– –
LDOS icon
1389
Leidos
LDOS
$17.7B
$203K ﹤0.01%
+1,872
New +$191K
BBD icon
1390
Banco Bradesco
BBD
$34.5B
$203K ﹤0.01%
57,862
-41
-0.1% -$129
ENVA icon
1391
Enova International
ENVA
$6.5B
$202K ﹤0.01%
+3,649
New +$168K
DIV icon
1392
Global X SuperDividend US ETF
DIV
$781M
$201K ﹤0.01%
11,709
-3,291
-22% -$53.6K
PPLI
1393
People Inc
PPLI
$2.99B
$200K ﹤0.01%
+4,663
New +$183K
GEN icon
1394
Gen Digital
GEN
$17.2B
$200K ﹤0.01%
+8,771
New +$174K
VTRS icon
1395
Viatris
VTRS
$18.8B
$199K ﹤0.01%
18,397
-6,305
-26% -$60.4K
BAB icon
1396
Invesco Taxable Municipal Bond ETF
BAB
$1.01B
$199K ﹤0.01%
7,400
– –
VMBS icon
1397
Vanguard Mortgage-Backed Securities ETF
VMBS
$15.7B
$199K ﹤0.01%
4,287
+126
+3% +$5.57K
VONG icon
1398
Vanguard Russell 1000 Growth ETF
VONG
$46.1B
$198K ﹤0.01%
2,543
-60
-2% -$4.37K
KIE icon
1399
State Street SPDR S&P Insurance ETF
KIE
$676M
$196K ﹤0.01%
4,329
-121
-3% -$5.31K
IEO icon
1400
iShares US Oil & Gas Exploration & Production ETF
IEO
$585M
$196K ﹤0.01%
2,100
-395
-16% -$37.5K
54 55
56
57 58

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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.