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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
JMBS icon
1276
Janus Henderson Mortgage-Backed Securities ETF
JMBS
$6.77B
$280K ﹤0.01%
+6,102
New +$267K
WBS icon
1277
Webster Financial
WBS
$12.8B
$280K ﹤0.01%
5,521
+123
+2% +$5.32K
MKTX icon
1278
MarketAxess Holdings
MKTX
$5.72B
$280K ﹤0.01%
+955
New +$231K
LBRDK icon
1279
Liberty Broadband Class C
LBRDK
$5.2B
$280K ﹤0.01%
3,469
+11
+0.3% +$923
EQT icon
1280
EQT Corp
EQT
$33.6B
$276K ﹤0.01%
7,149
-148
-2% -$6K
CR icon
1281
Crane Co
CR
$12.8B
$276K ﹤0.01%
2,339
+17
+0.7% +$1.71K
IDA icon
1282
Idacorp
IDA
$8.15B
$276K ﹤0.01%
2,809
+310
+12% +$30K
SQSP
1283
DELISTED
Squarespace, Inc.
SQSP
$274K ﹤0.01%
8,300
– –
WW
1284
DELISTED
WW International
WW
$274K ﹤0.01%
31,300
+1,300
+4% +$11K
GME icon
1285
GameStop
GME
$8.31B
$273K ﹤0.01%
15,589
-475
-3% -$6.97K
FDL icon
1286
First Trust Morningstar Dividend Leaders Index Fund
FDL
$7.96B
$273K ﹤0.01%
7,609
-2,523
-25% -$85.5K
IPGP icon
1287
IPG Photonics
IPGP
$3.64B
$273K ﹤0.01%
2,515
-370
-13% -$35.8K
PDCO
1288
DELISTED
Patterson Companies, Inc.
PDCO
$268K ﹤0.01%
9,431
-8,636
-48% -$254K
VOD icon
1289
Vodafone
VOD
$37.4B
$268K ﹤0.01%
30,836
+388
+1% +$3.54K
ZION icon
1290
Zions Bancorporation
ZION
$10.5B
$267K ﹤0.01%
6,090
-1,776
-23% -$64.1K
STLD icon
1291
Steel Dynamics
STLD
$37.6B
$267K ﹤0.01%
2,258
+156
+7% +$17.4K
SMIG icon
1292
Bahl & Gaynor Small/Mid Cap Income Growth ETF
SMIG
$1.51B
$266K ﹤0.01%
10,574
-7,600
-42% -$177K
DEM icon
1293
WisdomTree Emerging Markets High Dividend Fund
DEM
$3.98B
$265K ﹤0.01%
6,513
-1,649
-20% -$63.1K
ALC icon
1294
Alcon
ALC
$35.3B
$265K ﹤0.01%
3,387
-351
-9% -$25.9K
PRFZ icon
1295
Invesco FTSE RAFI US 1500 Small-Mid ETF
PRFZ
$2.91B
$263K ﹤0.01%
7,025
– –
ETHO icon
1296
Amplify Etho Climate Leadership US ETF
ETHO
$195M
$263K ﹤0.01%
4,728
+268
+6% +$13.6K
PECO icon
1297
Phillips Edison & Co
PECO
$5.19B
$263K ﹤0.01%
7,205
-364
-5% -$12.7K
WU icon
1298
Western Union
WU
$2.29B
$263K ﹤0.01%
22,030
-368
-2% -$4.49K
ASB icon
1299
Associated Banc-Corp
ASB
$6.08B
$262K ﹤0.01%
12,267
– –
XBAP icon
1300
Innovator US Equity Accelerated 9 Buffer ETF April
XBAP
$133M
$262K ﹤0.01%
8,582
– –
50 51
52
53 54

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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.