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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 | |
|---|---|---|---|---|---|---|
301
Blue Bird Corp
BLBD
$2.04B
| $13.2M | 0.04% |
341,005
-17,388
| -5% | -$726K |
|
302
Comcast
CMCSA
$90.4B
| $13.1M | 0.04% |
349,983
-22,595
| -6% | -$938K |
|
303
State Street Energy Select Sector SPDR ETF
XLE
$39.9B
| $13.1M | 0.04% |
304,858
+7,062
| +2% | +$321K |
|
|
STKL
304
DELISTED
SunOpta
STKL
| $12.8M | 0.04% |
1,664,244
-72,778
| -4% | -$515K |
|
305
Shift4
FOUR
$3.47B
| $12.7M | 0.04% |
122,748
+114,545
| +1,396% | +$11.4M |
|
306
iShares Russell Mid-Cap ETF
IWR
$57.9B
| $12.7M | 0.04% |
143,847
+3,851
| +3% | +$350K |
|
307
EOG Resources
EOG
$75.1B
| $12.7M | 0.04% |
103,435
-7,208
| -7% | -$921K |
|
308
State Street SPDR S&P Biotech ETF
XBI
$10.5B
| $12.6M | 0.04% |
139,754
-4,112
| -3% | -$398K |
|
309
Corning
GLW
$144B
| $12.5M | 0.04% |
262,513
+41,144
| +19% | +$1.95M |
|
310
iShares Core US Aggregate Bond ETF
AGG
$138B
| $12.3M | 0.04% |
126,991
-2,282
| -2% | -$225K |
|
311
Trimble
TRMB
$13.1B
| $12.2M | 0.04% |
172,648
-4,483
| -3% | -$305K |
|
312
Ferguson
FERG
$47.4B
| $12M | 0.04% |
69,278
-5,289
| -7% | -$1.05M |
|
|
ONT
313
Onterris Inc
ONT
$576M
| $12M | 0.03% |
646,612
-104,076
| -14% | -$2.19M |
|
314
Quanta Services
PWR
$102B
| $11.5M | 0.03% |
36,331
+9,859
| +37% | +$3.17M |
|
315
Cboe Global Markets
CBOE
$30.4B
| $11.5M | 0.03% |
58,738
-307
| -0.5% | -$63.2K |
|
316
Portillo's
PTLO
$345M
| $11.5M | 0.03% |
1,220,048
-442,782
| -27% | -$5.07M |
|
317
Xometry
XMTR
$5.34B
| $11.4M | 0.03% |
268,256
+7,559
| +3% | +$214K |
|
318
Medpace
MEDP
$16.7B
| $11.3M | 0.03% |
34,145
-25,173
| -42% | -$8.54M |
|
319
Transmedics
TMDX
$3.02B
| $11.3M | 0.03% |
180,564
+44,610
| +33% | +$4.15M |
|
320
Cigna
CI
$73.3B
| $11.2M | 0.03% |
40,405
-1,670
| -4% | -$532K |
|
321
iShares Russell 2000 Growth ETF
IWO
$15B
| $11M | 0.03% |
38,271
-689
| -2% | -$204K |
|
322
Vanguard Morningstar Mid-Cap Growth ETF
VOT
$20B
| $11M | 0.03% |
43,291
+1,013
| +2% | +$261K |
|
323
Viking Therapeutics
VKTX
$3.97B
| $10.9M | 0.03% |
271,869
+44,915
| +20% | +$2.56M |
|
324
Invesco S&P 500 Quality ETF
SPHQ
$19.9B
| $10.9M | 0.03% |
162,600
+28,460
| +21% | +$1.93M |
|
325
GoDaddy
GDDY
$11.6B
| $10.9M | 0.03% |
55,059
-2,157
| -4% | -$394K |
|
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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.