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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
ITM icon
1726
VanEck Intermediate Muni ETF
ITM
$2.13B
$9.22K ﹤0.01%
200
– –
ANGL icon
1727
VanEck Fallen Angel High Yield Bond ETF
ANGL
$3.11B
$8.97K ﹤0.01%
313
– –
DOL icon
1728
WisdomTree True Developed International Fund
DOL
$845M
$8.85K ﹤0.01%
179
– –
QDF icon
1729
FlexShares Quality Dividend Index Fund
QDF
$2.28B
$8.75K ﹤0.01%
124
– –
XTN icon
1730
State Street SPDR S&P Transportation ETF
XTN
$392M
$8.67K ﹤0.01%
100
– –
HLLY.WS
1731
DELISTED
Holley Inc Warrants
HLLY.WS
$8.57K ﹤0.01%
155,900
+128,900
+477% +$6.33K
HEWJ icon
1732
iShares Currency Hedged MSCI Japan ETF
HEWJ
$763M
$8.52K ﹤0.01%
200
-350
-64% -$14.8K
FXD icon
1733
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$272M
$8.43K ﹤0.01%
130
+35
+37% +$2.27K
IXP icon
1734
iShares Global Comm Services ETF
IXP
$561M
$8.22K ﹤0.01%
85
– –
KBWP icon
1735
Invesco KBW Property & Casualty Insurance ETF
KBWP
$266M
$8.12K ﹤0.01%
+70
New +$8.31K
VNM icon
1736
VanEck Vietnam ETF
VNM
$514M
$8.04K ﹤0.01%
700
– –
SEATW icon
1737
Vivid Seats Inc Warrant
SEATW
$499K
$7.81K ﹤0.01%
22,000
+15,000
+214% +$3.27K
IYM icon
1738
iShares US Basic Materials ETF
IYM
$1.02B
$7.58K ﹤0.01%
58
-405
-87% -$58.5K
VXX icon
1739
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$141M
$7.37K ﹤0.01%
+161
New +$7.79K
INTF icon
1740
iShares International Equity Factor ETF
INTF
$3.75B
$7.32K ﹤0.01%
255
– –
STEM icon
1741
Stem
STEM
$48.8M
$7.16K ﹤0.01%
+593
New +$5.11K
ELD icon
1742
WisdomTree Emerging Markets Local Debt Fund
ELD
$143M
$7.08K ﹤0.01%
279
+1
+0.4% +$26
TQQQ icon
1743
ProShares UltraPro QQQ
TQQQ
$37.4B
$6.96K ﹤0.01%
176
– –
XHS icon
1744
State Street SPDR S&P Health Care Services ETF
XHS
$207M
$6.76K ﹤0.01%
75
– –
MILN
1745
Global X Millennial Consumer ETF
MILN
$102M
$6.74K ﹤0.01%
150
– –
SLVP icon
1746
iShares MSCI Global Silver and Metals Miners ETF
SLVP
$976M
$6.62K ﹤0.01%
574
-221
-28% -$2.94K
NFRA icon
1747
FlexShares STOXX Global Broad Infrastructure Index Fund
NFRA
$3.03B
$6.62K ﹤0.01%
122
– –
BBUS icon
1748
JPMorgan BetaBuilders US Equity ETF
BBUS
$9.22B
$6.36K ﹤0.01%
60
– –
DWM icon
1749
WisdomTree International Equity Fund
DWM
$693M
$6.32K ﹤0.01%
120
– –
SPIP icon
1750
State Street SPDR Portfolio TIPS ETF
SPIP
$1.01B
$6.13K ﹤0.01%
242
– –
68 69
70
71 72

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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.