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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
MGEE icon
1226
MGE Energy Inc
MGEE
$3.06B
$315K ﹤0.01%
4,350
– –
MBLY icon
1227
Mobileye
MBLY
$7.6B
$314K ﹤0.01%
7,257
– –
IMCG icon
1228
iShares Morningstar Mid-Cap Growth ETF
IMCG
$4.18B
$314K ﹤0.01%
4,875
– –
NTLA icon
1229
Intellia Therapeutics
NTLA
$1.68B
$313K ﹤0.01%
10,250
+1,000
+11% +$28.7K
FOXF icon
1230
Fox Factory Holding Corp
FOXF
$891M
$309K ﹤0.01%
4,581
-1,266
-22% -$92.4K
ETR icon
1231
Entergy
ETR
$49.8B
$307K ﹤0.01%
6,074
-662
-10% -$32.3K
ACGL icon
1232
Arch Capital
ACGL
$33.3B
$307K ﹤0.01%
4,128
+143
+4% +$11.7K
RMBS icon
1233
Rambus
RMBS
$10.9B
$306K ﹤0.01%
4,479
+15
+0.3% +$934
AER icon
1234
AerCap
AER
$23.4B
$305K ﹤0.01%
+4,110
New +$271K
SLV icon
1235
iShares Silver Trust
SLV
$31.4B
$305K ﹤0.01%
13,988
+50
+0.4% +$1.06K
OABI icon
1236
OmniAb
OABI
$503M
$305K ﹤0.01%
49,360
-279
-0.6% -$1.37K
FAF icon
1237
First American
FAF
$7.5B
$303K ﹤0.01%
4,698
-62
-1% -$3.54K
CPRI icon
1238
Capri Holdings
CPRI
$1.78B
$302K ﹤0.01%
6,012
– –
IXJ icon
1239
iShares Global Healthcare ETF
IXJ
$4.22B
$302K ﹤0.01%
3,482
-37
-1% -$3.07K
XNTK icon
1240
State Street SPDR NYSE Technology ETF
XNTK
$2.29B
$302K ﹤0.01%
1,837
– –
DXJ icon
1241
WisdomTree Japan Hedged Equity Fund
DXJ
$7.56B
$301K ﹤0.01%
3,421
-21,591
-86% -$1.91M
URBN icon
1242
Urban Outfitters
URBN
$6.52B
$301K ﹤0.01%
+8,424
New +$293K
GRID
1243
First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund
GRID
$12.3B
$300K ﹤0.01%
2,869
-309
-10% -$29.2K
WES icon
1244
Western Midstream Partners
WES
$20B
$299K ﹤0.01%
10,234
+66
+0.6% +$1.84K
ITB icon
1245
iShares US Home Construction ETF
ITB
$2.37B
$298K ﹤0.01%
2,934
+620
+27% +$52.7K
BNDX icon
1246
Vanguard Total International Bond ETF
BNDX
$83B
$297K ﹤0.01%
6,025
-3,506
-37% -$171K
ALLK
1247
DELISTED
Allakos
ALLK
$297K ﹤0.01%
108,717
+22,000
+25% +$49.6K
M icon
1248
Macy's
M
$6.26B
$296K ﹤0.01%
14,722
+242
+2% +$3.5K
ROBO icon
1249
ROBO Global Robotics & Automation Index ETF
ROBO
$2.12B
$295K ﹤0.01%
5,153
-582
-10% -$29.7K
RPG icon
1250
Invesco S&P 500 Pure Growth ETF
RPG
$2.1B
$295K ﹤0.01%
9,145
– –
48 49
50
51 52

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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.