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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 | |
|---|---|---|---|---|---|---|
976
Dime Commercial Bancshares
DCOM
$1.82B
| $778K | ﹤0.01% |
25,324
| – | – |
|
977
NiSource
NI
$20.2B
| $775K | ﹤0.01% |
21,070
-1,711
| -8% | -$61.4K |
|
978
Solventum
SOLV
$14.7B
| $764K | ﹤0.01% |
11,562
-2,305
| -17% | -$161K |
|
979
Sun Communities
SUI
$14.6B
| $763K | ﹤0.01% |
6,206
-22
| -0.4% | -$2.82K |
|
|
FLIC
980
DELISTED
First of Long Island Corp
FLIC
| $757K | ﹤0.01% |
64,809
| – | – |
|
981
Cognizant
CTSH
$26.7B
| $756K | ﹤0.01% |
9,836
-6,890
| -41% | -$539K |
|
|
BELFB
982
Bel Fuse Inc Class B
BELFB
$4.13B
| $755K | ﹤0.01% |
9,150
| – | – |
|
983
AutoNation
AN
$6.89B
| $752K | ﹤0.01% |
4,427
-15
| -0.3% | -$2.53K |
|
984
Warner Bros
WBD
$69.6B
| $748K | ﹤0.01% |
70,768
-7,959
| -10% | -$74K |
|
985
IDEX
IEX
$17.6B
| $746K | ﹤0.01% |
3,562
+232
| +7% | +$50.8K |
|
986
ProShares Ultra S&P500
SSO
$8.51B
| $743K | ﹤0.01% |
16,070
+3,598
| +29% | +$169K |
|
987
Regal Rexnord
RRX
$11.4B
| $741K | ﹤0.01% |
4,777
-4,183
| -47% | -$707K |
|
988
Popular Inc
BPOP
$11.3B
| $738K | ﹤0.01% |
7,850
| – | – |
|
|
LGF.B
989
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $724K | ﹤0.01% |
95,900
| – | – |
|
990
DoorDash
DASH
$93.7B
| $722K | ﹤0.01% |
4,304
+664
| +18% | +$109K |
|
991
Dropbox
DBX
$7.81B
| $719K | ﹤0.01% |
23,950
+206
| +0.9% | +$5.69K |
|
992
Global X S&P 500 Covered Call ETF
XYLD
$3.28B
| $707K | ﹤0.01% |
16,881
+726
| +4% | +$30.5K |
|
993
DraftKings
DKNG
$12.6B
| $707K | ﹤0.01% |
19,001
-572
| -3% | -$22.7K |
|
994
APi Group
APG
$18.8B
| $706K | ﹤0.01% |
+29,438
| New | +$700K |
|
995
GSK
GSK
$101B
| $701K | ﹤0.01% |
20,731
-2,559
| -11% | -$92.1K |
|
996
iShares Core 1-5 Year USD Bond ETF
ISTB
$5.14B
| $700K | ﹤0.01% |
14,661
-687
| -4% | -$33K |
|
|
IPG
997
DELISTED
Interpublic Group of Companies
IPG
| $700K | ﹤0.01% |
24,990
-221
| -0.9% | -$6.6K |
|
998
iShares MBS ETF
MBB
$39.2B
| $697K | ﹤0.01% |
7,599
-411
| -5% | -$38.3K |
|
999
Revvity
RVTY
$13.1B
| $695K | ﹤0.01% |
6,228
-6
| -0.1% | -$705 |
|
1000
Loews
L
$23B
| $693K | ﹤0.01% |
8,187
+634
| +8% | +$52.3K |
|
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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.