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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 | |
|---|---|---|---|---|---|---|
701
Pure Cycle
PCYO
$273M
| $2.09M | 0.01% |
164,837
| – | – |
|
702
Vanguard FTSE Europe ETF
VGK
$31.1B
| $2.09M | 0.01% |
32,921
-1,935
| -6% | -$129K |
|
703
Willis Towers Watson
WTW
$31B
| $2.08M | 0.01% |
6,629
-44
| -0.7% | -$13.5K |
|
704
First Citizens BancShares
FCNCA
$25.6B
| $2.07M | 0.01% |
980
-32
| -3% | -$67K |
|
705
Keysight
KEYS
$60.5B
| $2.05M | 0.01% |
12,756
-1,329
| -9% | -$214K |
|
706
Dentsply Sirona
XRAY
$2.29B
| $2.03M | 0.01% |
107,010
-15,134
| -12% | -$320K |
|
707
AvalonBay Communities
AVB
$26.3B
| $2.02M | 0.01% |
9,161
+393
| +4% | +$88.7K |
|
708
iShares US Real Estate ETF
IYR
$4.58B
| $2.01M | 0.01% |
21,650
-415
| -2% | -$40.9K |
|
709
iShares MSCI Japan ETF
EWJ
$23.2B
| $2.01M | 0.01% |
29,997
-258
| -0.9% | -$17.8K |
|
710
ProShares Ultra Semiconductors
USD
$3.04B
| $2.01M | 0.01% |
61,712
+72
| +0.1% | +$2.39K |
|
711
Boston Scientific
BSX
$75B
| $2M | 0.01% |
22,437
+2,461
| +12% | +$217K |
|
712
NCR Voyix
VYX
$1.14B
| $2M | 0.01% |
62,715
+16,125
| +35% | +$224K |
|
713
Vanguard Short-Term Inflation-Protected Securities Index Fund
VTIP
$19.8B
| $2M | 0.01% |
41,245
+25,569
| +163% | +$1.25M |
|
714
Biogen
BIIB
$31.1B
| $2M | 0.01% |
13,049
+894
| +7% | +$151K |
|
715
RPM International
RPM
$14.5B
| $1.98M | 0.01% |
16,053
| – | – |
|
716
Jack Henry & Associates
JKHY
$10.9B
| $1.97M | 0.01% |
11,263
-755
| -6% | -$135K |
|
717
Otis Worldwide
OTIS
$27.9B
| $1.97M | 0.01% |
21,287
-3,556
| -14% | -$357K |
|
718
Aflac
AFL
$60.7B
| $1.96M | 0.01% |
18,921
+373
| +2% | +$40.7K |
|
719
Invesco Aerospace & Defense ETF
PPA
$8.7B
| $1.95M | 0.01% |
16,966
-782
| -4% | -$92.3K |
|
720
Public Service Enterprise Group
PEG
$37.8B
| $1.94M | 0.01% |
22,972
+661
| +3% | +$58.5K |
|
721
iShares S&P Mid-Cap 400 Value ETF
IJJ
$9.06B
| $1.92M | 0.01% |
15,394
-488
| -3% | -$62.3K |
|
722
Gogo Inc
GOGO
$388M
| $1.9M | 0.01% |
234,531
-219,525
| -48% | -$1.64M |
|
723
Vanguard Total World Stock ETF
VT
$81.9B
| $1.9M | 0.01% |
16,136
+801
| +5% | +$96.1K |
|
724
Blackstone Secured Lending
BXSL
$5.81B
| $1.89M | 0.01% |
58,549
+33,267
| +132% | +$1.04M |
|
|
BNY
725
Bank of New York Mellon
BNY
$110B
| $1.89M | 0.01% |
24,605
+930
| +4% | +$71.9K |
|
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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.