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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
IAK icon
1776
iShares US Insurance ETF
IAK
$534M
$2.78K ﹤0.01%
22
– –
PBP icon
1777
Invesco S&P 500 BuyWrite ETF
PBP
$364M
$2.55K ﹤0.01%
108
– –
EWI icon
1778
iShares MSCI Italy ETF
EWI
$1.08B
$2.45K ﹤0.01%
+68
New +$2.53K
EDEN icon
1779
iShares MSCI Denmark ETF
EDEN
$206M
$2.23K ﹤0.01%
+21
New +$2.45K
PGF icon
1780
Invesco Financial Preferred ETF
PGF
$668M
$2.18K ﹤0.01%
150
– –
IYT icon
1781
iShares US Transportation ETF
IYT
$2.27B
$2.16K ﹤0.01%
32
– –
NORW icon
1782
Global X MSCI Norway ETF
NORW
$87.7M
$2.04K ﹤0.01%
87
– –
XSLV icon
1783
Invesco S&P SmallCap Low Volatility ETF
XSLV
$249M
$1.98K ﹤0.01%
42
– –
HYLS icon
1784
First Trust Exchange-Traded Fund IV First Trust Tactical High Yield ETF
HYLS
$1.64B
$1.9K ﹤0.01%
46
– –
SILJ icon
1785
Amplify Junior Silver Miners ETF
SILJ
$3.99B
$1.89K ﹤0.01%
190
– –
CORZZ icon
1786
Core Scientific Inc Tranche 2 Warrants
CORZZ
$1.75B
$1.7K ﹤0.01%
121
-6,331
-98% -$93.3K
PXH icon
1787
Invesco FTSE RAFI Emerging Markets ETF
PXH
$1.97B
$1.68K ﹤0.01%
82
– –
EWP icon
1788
iShares MSCI Spain ETF
EWP
$2.22B
$1.68K ﹤0.01%
54
-36
-40% -$1.19K
TIPX icon
1789
State Street SPDR Bloomberg 1-10 Year TIPS ETF
TIPX
$2.04B
$1.66K ﹤0.01%
+90
New +$1.68K
SEAT icon
1790
Vivid Seats
SEAT
$81.6M
$1.49K ﹤0.01%
16
-749
-98% -$55.8K
PFFD icon
1791
Global X US Preferred ETF
PFFD
$2.17B
$1.48K ﹤0.01%
76
+1
+1% +$20
IMCB icon
1792
iShares Morningstar Mid-Cap ETF
IMCB
$1.72B
$1.45K ﹤0.01%
19
– –
EWN icon
1793
iShares MSCI Netherlands ETF
EWN
$727M
$1.25K ﹤0.01%
+28
New +$1.31K
FCG icon
1794
First Trust Natural Gas ETF
FCG
$645M
$1.23K ﹤0.01%
+50
New +$1.23K
EPU icon
1795
iShares MSCI Peru and Global Exposure ETF
EPU
$550M
$1.11K ﹤0.01%
+28
New +$1.2K
EBND icon
1796
State Street SPDR Bloomberg Emerging Markets Local Bond ETF
EBND
$2.27B
$1.07K ﹤0.01%
55
– –
SRVR icon
1797
Pacer Data & Infrastructure Real Estate ETF
SRVR
$386M
$1.02K ﹤0.01%
34
-355
-91% -$11.1K
FALN icon
1798
iShares Fallen Angels USD Bond ETF
FALN
$1.6B
$962 ﹤0.01%
36
-63
-64% -$1.7K
SCJ icon
1799
iShares MSCI Japan Small-Cap ETF
SCJ
$264M
$934 ﹤0.01%
+13
New +$972
BLV icon
1800
Vanguard Long-Term Bond ETF
BLV
$5.7B
$753 ﹤0.01%
11
– –
70 71
72
73 74

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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.