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William Blair & Company

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
Cap. Flow
-$18.6M
Cap. Flow %
-0.05%
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
BLK icon
Blackrock
BLK
+$53.4M
3
CWAN
Clearwater Analytics
CWAN
+$48.5M
4
NVDA icon
NVIDIA
NVDA
+$47.9M
5
BWXT icon
BWX Technologies
BWXT
+$47M

Top Sells

Rank Stock Value
1
DXCM icon
DexCom
DXCM
+$37.7M
2
CSGP icon
CoStar Group
CSGP
+$34.5M
3
VRTX icon
Vertex Pharmaceuticals
VRTX
+$30M
4
BAH icon
Booz Allen Hamilton
BAH
+$29.1M
5
IDXX icon
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
XT icon
1051
iShares Future Exponential Technologies ETF
XT
$4.01B
$588K ﹤0.01%
9,853
+180
+2% +$10.9K
CNNE icon
1052
Cannae Holdings
CNNE
$675M
$588K ﹤0.01%
29,587
-1,723
-6% -$34.5K
OWL icon
1053
Blue Owl Capital
OWL
$19.7B
$586K ﹤0.01%
+25,203
New +$577K
MTTR
1054
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
$585K ﹤0.01%
123,373
– –
PFEB icon
1055
Innovator US Equity Power Buffer ETF February
PFEB
$926M
$585K ﹤0.01%
15,888
– –
HDB icon
1056
HDFC Bank
HDB
$119B
$584K ﹤0.01%
18,280
-12,402
-40% -$397K
FTCS icon
1057
First Trust Capital Strength ETF
FTCS
$8.02B
$580K ﹤0.01%
6,604
-2,295
-26% -$209K
SPOT icon
1058
Spotify
SPOT
$102B
$578K ﹤0.01%
1,292
+593
+85% +$254K
SHM icon
1059
State Street SPDR Nuveen ICE Short Term Municipal Bond ETF
SHM
$3.48B
$578K ﹤0.01%
12,194
+17
+0.1% +$811
FBIN icon
1060
Fortune Brands Innovations
FBIN
$5.78B
$577K ﹤0.01%
8,437
-1,334
-14% -$107K
CASY icon
1061
Casey's General Stores
CASY
$31.6B
$574K ﹤0.01%
1,448
-13
-0.9% -$5.24K
IYJ icon
1062
iShares US Industrials ETF
IYJ
$1.96B
$569K ﹤0.01%
4,262
+102
+2% +$14K
CALY
1063
Callaway Golf Company
CALY
$2.95B
$569K ﹤0.01%
72,384
-6,388
-8% -$58K
ARGX icon
1064
argenx
ARGX
$53.6B
$562K ﹤0.01%
914
-6
-0.7% -$3.52K
RBLX icon
1065
Roblox
RBLX
$27.1B
$558K ﹤0.01%
9,642
+3,295
+52% +$166K
HSBC icon
1066
HSBC
HSBC
$358B
$557K ﹤0.01%
11,268
-788
-7% -$36.6K
NSIT icon
1067
Insight Enterprises
NSIT
$4.6B
$556K ﹤0.01%
3,655
-2
-0.1% -$357
VPL icon
1068
Vanguard FTSE Pacific ETF
VPL
$8.65B
$555K ﹤0.01%
7,808
-793
-9% -$59.2K
VIGL
1069
DELISTED
Vigil Neuroscience
VIGL
$551K ﹤0.01%
+323,900
New +$956K
ILCG icon
1070
iShares Morningstar Growth ETF
ILCG
$3.3B
$550K ﹤0.01%
6,135
+3
+0% +$265
MUFG icon
1071
Mitsubishi UFJ Financial
MUFG
$260B
$549K ﹤0.01%
46,859
-1,531
-3% -$17.2K
CCL icon
1072
Carnival Corporation Ltd
CCL
$38.9B
$546K ﹤0.01%
21,899
+3,020
+16% +$70.7K
SMIN icon
1073
iShares MSCI India Small-Cap ETF
SMIN
$773M
$544K ﹤0.01%
7,111
+410
+6% +$33.6K
NVT icon
1074
nVent Electric
NVT
$27.5B
$542K ﹤0.01%
7,951
-11,605
-59% -$855K
CHDN icon
1075
Churchill Downs
CHDN
$6.2B
$542K ﹤0.01%
4,057
-5,202
-56% -$721K
41 42
43
44 45

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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.