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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
XJR icon
1501
iShares ESG Screened S&P Small-Cap ETF
XJR
$190M
$98.7K ﹤0.01%
2,580
+1,219
+90% +$41.3K
SIRI icon
1502
SiriusXM
SIRI
$9.59B
$96.5K ﹤0.01%
1,764
-1,620
-48% -$77.8K
SMWB icon
1503
Similarweb
SMWB
$770M
$96.2K ﹤0.01%
18,041
-126,995
-88% -$665K
SH icon
1504
ProShares Short S&P500
SH
$844M
$95.8K ﹤0.01%
1,844
-948
-34% -$53.1K
IGF icon
1505
iShares Global Infrastructure ETF
IGF
$10.7B
$94.7K ﹤0.01%
2,012
– –
IMTB icon
1506
iShares Core 5-10 Year USD Bond ETF
IMTB
$275M
$92.9K ﹤0.01%
2,136
– –
HEDJ icon
1507
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.87B
$90.8K ﹤0.01%
2,120
-688
-25% -$27.8K
EGRX
1508
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
$90.8K ﹤0.01%
17,365
-5,085
-23% -$50.2K
ARDX icon
1509
Ardelyx
ARDX
$1.03B
$89.9K ﹤0.01%
+14,500
New +$65K
USHY icon
1510
iShares Broad USD High Yield Corporate Bond ETF
USHY
$29.1B
$88.2K ﹤0.01%
2,427
+6
+0.2% +$210
SJNK icon
1511
State Street SPDR Bloomberg Short Term High Yield Bond ETF
SJNK
$4.8B
$88K ﹤0.01%
3,501
+177
+5% +$4.34K
LONA
1512
LeonaBio Inc
LONA
$73.9M
$87.6K ﹤0.01%
3,605
– –
FHLC icon
1513
Fidelity MSCI Health Care Index ETF
FHLC
$3.42B
$87.5K ﹤0.01%
1,353
– –
BITO icon
1514
ProShares Bitcoin Strategy ETF
BITO
$1.43B
$86.4K ﹤0.01%
4,217
+1,282
+44% +$23.2K
RNTX
1515
Rein Therapeutics
RNTX
$68.9M
$86.3K ﹤0.01%
28,297
-700
-2% -$1.36K
AG icon
1516
First Majestic Silver
AG
$9.44B
$86.2K ﹤0.01%
14,015
-1,023
-7% -$5.64K
MPT
1517
Medical Properties Trust
MPT
$2.42B
$83K ﹤0.01%
16,910
-980
-5% -$4.8K
SCHZ icon
1518
Schwab US Aggregate Bond ETF
SCHZ
$10.5B
$82.6K ﹤0.01%
3,544
+2,178
+159% +$48.7K
QUS icon
1519
State Street SPDR MSCI USA StrategicFactors ETF
QUS
$1.58B
$81.3K ﹤0.01%
615
– –
GGT
1520
Gabelli Multimedia Trust
GGT
$178M
$80.2K ﹤0.01%
14,354
-1,776
-11% -$9.47K
PGJ icon
1521
Invesco Golden Dragon China ETF
PGJ
$95.1M
$79.4K ﹤0.01%
3,050
– –
FXL icon
1522
First Trust Technology AlphaDEX Fund
FXL
$2.84B
$78.8K ﹤0.01%
615
– –
JNK icon
1523
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.31B
$78.2K ﹤0.01%
825
-3,576
-81% -$326K
GENI icon
1524
Genius Sports
GENI
$2.12B
$77.6K ﹤0.01%
12,550
-1
-0% -$5
ATOM icon
1525
Atomera
ATOM
$216M
$77.3K ﹤0.01%
11,025
– –
59 60
61
62 63

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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.