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William Blair & Company Portfolio holdings
AUM
$34.9B
1-Year Est. Return
18.88%
This Fund
S&P 500
This Quarter
Est. Return
+3.1%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+512.03%
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 | |
|---|---|---|---|---|---|---|
1
Microsoft
MSFT
$2.93T
| $1.61B | 4.67% |
3,811,770
+43,033
| +1% | +$18.3M |
|
2
Apple
AAPL
$4.99T
| $1.57B | 4.57% |
6,277,205
-107,747
| -2% | -$25.4M |
|
3
Amazon
AMZN
$2.45T
| $1.35B | 3.93% |
6,163,344
+66,200
| +1% | +$13.5M |
|
|
4
NVIDIA
NVDA
$4.67T
| $677M | 1.97% |
5,040,883
+347,775
| +7% | +$47.9M |
|
5
Visa
V
$707B
| $660M | 1.92% |
2,089,726
-62,093
| -3% | -$18.7M |
|
6
Alphabet (Google) Class C
GOOG
$4.08T
| $620M | 1.8% |
3,253,651
-60,280
| -2% | -$10.6M |
|
7
JPMorgan Chase
JPM
$931B
| $572M | 1.66% |
2,384,611
-24,865
| -1% | -$5.79M |
|
8
Mastercard
MA
$501B
| $547M | 1.59% |
1,039,691
-1,458
| -0.1% | -$755K |
|
9
Costco
COST
$431B
| $539M | 1.57% |
588,056
-402
| -0.1% | -$373K |
|
|
10
Alphabet (Google) Class A
GOOGL
$4.09T
| $490M | 1.43% |
2,591,086
-33,488
| -1% | -$5.86M |
|
11
State Street SPDR S&P 500 ETF Trust
SPY
$777B
| $480M | 1.4% |
819,692
+14,333
| +2% | +$8.44M |
|
|
12
Idexx Laboratories
IDXX
$44.9B
| $457M | 1.33% |
1,105,014
-60,555
| -5% | -$26.6M |
|
|
FISV
13
Fiserv Inc
FISV
$29.6B
| $426M | 1.24% |
2,074,202
-36,500
| -2% | -$7.45M |
|
14
Danaher
DHR
$141B
| $394M | 1.15% |
1,717,881
-47,116
| -3% | -$11.6M |
|
15
Progressive
PGR
$129B
| $380M | 1.11% |
1,586,218
-22,868
| -1% | -$5.76M |
|
16
Watsco Inc
WSO
$12.9B
| $365M | 1.06% |
770,936
-14,109
| -2% | -$7.15M |
|
17
Zoetis
ZTS
$33B
| $365M | 1.06% |
2,240,186
-127,391
| -5% | -$22.8M |
|
18
Stryker
SYK
$134B
| $335M | 0.98% |
931,674
+1,297
| +0.1% | +$481K |
|
19
ServiceNow
NOW
$118B
| $327M | 0.95% |
1,541,415
-11,700
| -0.8% | -$2.37M |
|
20
Copart
CPRT
$28.9B
| $297M | 0.86% |
5,175,453
-45,354
| -0.9% | -$2.58M |
|
21
Home Depot
HD
$339B
| $294M | 0.86% |
755,641
+2,716
| +0.4% | +$1.11M |
|
22
Workday
WDAY
$41B
| $290M | 0.84% |
1,123,106
-41,062
| -4% | -$10.5M |
|
23
Adobe
ADBE
$104B
| $276M | 0.8% |
621,304
-30,048
| -5% | -$14.9M |
|
24
Intercontinental Exchange
ICE
$87B
| $268M | 0.78% |
1,799,061
-44,999
| -2% | -$7.13M |
|
25
Eli Lilly
LLY
$1.09T
| $258M | 0.75% |
334,361
-4,937
| -1% | -$4.09M |
|
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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.