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William Blair & Company Portfolio holdings
AUM
$38.4B
1-Year Est. Return
25.71%
This Fund
S&P 500
This Quarter
Est. Return
+3.1%
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
$34.4B
AUM Growth
+$328M
(+0.96%)
Cap. Flow
-$18.6M
Cap. Flow
% of AUM
-0.05%
Top 10 Holdings %
Top 10 Hldgs %
25.12%
Holding
1,903
New
83
Increased
650
Reduced
792
Closed
87
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
XYZ
Block Inc
XYZ
|
+$80.6M |
| 2 |
Blackrock
BLK
|
+$53.4M |
| 3 |
CWAN
Clearwater Analytics
CWAN
|
+$48.5M |
| 4 |
NVIDIA
NVDA
|
+$47.9M |
| 5 |
BWX Technologies
BWXT
|
+$47M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
DexCom
DXCM
|
+$37.7M |
| 2 |
CoStar Group
CSGP
|
+$34.5M |
| 3 |
Vertex Pharmaceuticals
VRTX
|
+$30M |
| 4 |
Booz Allen Hamilton
BAH
|
+$29.1M |
| 5 |
Idexx Laboratories
IDXX
|
+$26.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 28.35% |
| 2 | Financials | 13.43% |
| 3 | Healthcare | 12.44% |
| 4 | Industrials | 11.81% |
| 5 | Consumer Discretionary | 8.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1251
Bank of America Series L
BAC.PRL
$4.01B
| $327K | ﹤0.01% |
268
| – | – |
|
1252
Bright Horizons
BFAM
$3.82B
| $326K | ﹤0.01% |
2,939
-5,758
| -66% | -$693K |
|
1253
First American
FAF
$7.46B
| $325K | ﹤0.01% |
5,204
-37
| -0.7% | -$2.41K |
|
1254
Freshpet
FRPT
$3.49B
| $322K | ﹤0.01% |
2,177
-7,005
| -76% | -$1.02M |
|
1255
Duluth Holdings
DLTH
$152M
| $322K | ﹤0.01% |
104,232
-700
| -0.7% | -$2.54K |
|
1256
Albertsons Companies
ACI
$5.99B
| $321K | ﹤0.01% |
16,346
| – | – |
|
1257
CNO Financial Group
CNO
$5.07B
| $321K | ﹤0.01% |
8,621
-194
| -2% | -$7.2K |
|
1258
Hayward Holdings
HAYW
$3.23B
| $320K | ﹤0.01% |
20,936
+100
| +0.5% | +$1.57K |
|
1259
Old Second Bancorp
OSBC
$1.31B
| $320K | ﹤0.01% |
17,982
-644
| -3% | -$11.2K |
|
|
SNV
1260
DELISTED
Synovus
SNV
| $320K | ﹤0.01% |
6,241
+374
| +6% | +$19.4K |
|
1261
Wolfspeed
WOLF
$1.66B
| $317K | ﹤0.01% |
47,582
-19,467
| -29% | -$198K |
|
1262
East-West Bancorp
EWBC
$18.6B
| $316K | ﹤0.01% |
3,296
-346
| -10% | -$33.9K |
|
1263
Fidelity MSCI Utilities Index ETF
FUTY
$2.31B
| $316K | ﹤0.01% |
6,471
-34
| -0.5% | -$1.73K |
|
1264
Jazz Pharmaceuticals
JAZZ
$16B
| $312K | ﹤0.01% |
2,531
+509
| +25% | +$60K |
|
1265
Cedar Fair
FUN
$1.73B
| $309K | ﹤0.01% |
6,422
-718
| -10% | -$31.5K |
|
1266
Synchrony
SYF
$26.1B
| $309K | ﹤0.01% |
4,761
+684
| +17% | +$41.9K |
|
1267
LifeMD
LFMD
$161M
| $309K | ﹤0.01% |
62,500
| – | – |
|
1268
Argan
AGX
$8.04B
| $308K | ﹤0.01% |
2,250
-38
| -2% | -$5.22K |
|
1269
Eastman Chemical
EMN
$8.37B
| $308K | ﹤0.01% |
3,371
+92
| +3% | +$9.43K |
|
1270
iShares MSCI China ETF
MCHI
$6.14B
| $307K | ﹤0.01% |
6,562
+2,543
| +63% | +$126K |
|
1271
iShares MSCI United Kingdom ETF
EWU
$4.13B
| $307K | ﹤0.01% |
9,069
-2
| -0% | -$71 |
|
1272
Leggett & Platt
LEG
$1.32B
| $307K | ﹤0.01% |
32,022
| – | – |
|
1273
Rapid7
RPD
$871M
| $307K | ﹤0.01% |
7,624
-55,785
| -88% | -$2.26M |
|
1274
BlueLinx
BXC
$700M
| $306K | ﹤0.01% |
3,000
| – | – |
|
1275
Commault Systems
CVLT
$6.06B
| $306K | ﹤0.01% |
2,025
+25
| +1% | +$4.02K |
|
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William Blair & Company's Q4 2024 Portfolio in Review
As of Q4 2024, William Blair & Company held 1,903 positions worth $34.4B, up 0.96% from $34.1B the previous quarter. Its ten largest holdings account for 25% of the portfolio.
William Blair & Company's Q4 2024 filing shows 83 new, 650 increased, 792 reduced and 87 closed positions. Its largest new stake was Blackrock: 52,623 shares worth $53.9M. The largest sale was DexCom, an estimated $37.7M.
By sector, the portfolio is most concentrated in Technology at 28% of assets, up from 27% a quarter earlier, followed by Financials and Healthcare.
- William Blair & Company's largest Q4 2024 buy was Blackrock: 52,623 shares worth $53.9M.
- William Blair & Company added most to Block Inc in Q4 2024, an estimated $80.6M increase.
- William Blair & Company's biggest Q4 2024 reduction was DexCom, cutting an estimated $37.7M.
- William Blair & Company fully exited Rush Street Interactive in Q4 2024, selling an estimated $5.79M.
- William Blair & Company's ten largest holdings make up 25% of its $34.4B portfolio in Q4 2024.
- William Blair & Company opened 83 new positions and closed 87 in Q4 2024.
- William Blair & Company's portfolio value rose 0.96% quarter-over-quarter to $34.4B.
Based on William Blair & Company's 13F filing for Q4 2024, filed 12 Feb 2025.