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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
AAXJ icon
1676
iShares MSCI All Country Asia ex Japan ETF
AAXJ
$3.83B
$21.4K ﹤0.01%
296
– –
SPGP icon
1677
Invesco S&P 500 GARP ETF
SPGP
$2.31B
$21.3K ﹤0.01%
203
+1
+0.5% +$108
IVOO icon
1678
Vanguard S&P Mid-Cap 400 ETF
IVOO
$3.93B
$21.1K ﹤0.01%
200
– –
FUBO icon
1679
FuboTV Inc
FUBO
$293M
$19.8K ﹤0.01%
1,308
– –
SOCL icon
1680
Global X Social Media ETF
SOCL
$90.3M
$19.8K ﹤0.01%
467
– –
OIH icon
1681
VanEck Oil Services ETF
OIH
$1.96B
$18.9K ﹤0.01%
70
-13
-16% -$3.73K
XSW icon
1682
State Street SPDR S&P Software & Services ETF
XSW
$493M
$18.9K ﹤0.01%
100
+81
+426% +$14.7K
FWONA icon
1683
Liberty Media Series A
FWONA
$23.7B
$18.1K ﹤0.01%
215
-1
-0.5% -$78
COPX icon
1684
Global X Copper Miners ETF NEW
COPX
$8.22B
$18.1K ﹤0.01%
473
-568
-55% -$24.6K
DTH icon
1685
WisdomTree International High Dividend Fund
DTH
$659M
$17.7K ﹤0.01%
468
– –
WW
1686
DELISTED
WW International
WW
$16.7K ﹤0.01%
13,145
-4,500
-26% -$5.4K
NKTR icon
1687
Nektar Therapeutics
NKTR
$2.57B
$16.4K ﹤0.01%
1,178
+315
+37% +$5.55K
AIEQ icon
1688
Amplify AI Powered Equity ETF
AIEQ
$124M
$16.3K ﹤0.01%
409
– –
TEQI icon
1689
T. Rowe Price Equity Income ETF
TEQI
$469M
$16.2K ﹤0.01%
400
– –
GLDG
1690
GoldMining Inc
GLDG
$223M
$16.1K ﹤0.01%
20,000
– –
HLLY icon
1691
Holley
HLLY
$384M
$16K ﹤0.01%
5,300
+4,400
+489% +$12.3K
FTSM icon
1692
First Trust Enhanced Short Maturity ETF
FTSM
$6.54B
$15.8K ﹤0.01%
264
+2
+0.8% +$120
FXR icon
1693
First Trust Industrials/Producer Durables AlphaDEX Fund
FXR
$767M
$15.7K ﹤0.01%
210
– –
CLIP icon
1694
Global X 1-3 Month T-Bill ETF
CLIP
$2.4B
$15.3K ﹤0.01%
+153
New +$15.3K
GSSC icon
1695
GS ActiveBeta US Small Cap Equity ETF
GSSC
$1.1B
$15.1K ﹤0.01%
218
– –
ENFR icon
1696
Alerian Energy Infrastructure ETF
ENFR
$521M
$14.8K ﹤0.01%
475
– –
CZA icon
1697
Invesco Zacks Mid-Cap ETF
CZA
$192M
$14K ﹤0.01%
135
– –
EMC icon
1698
Global X Emerging Markets Great Consumer ETF
EMC
$57.1M
$14K ﹤0.01%
538
– –
BWX icon
1699
State Street SPDR Bloomberg International Treasury Bond ETF
BWX
$1.31B
$13.7K ﹤0.01%
640
-447
-41% -$9.87K
LNAI
1700
Lunai Bioworks
LNAI
$10.7M
$13.5K ﹤0.01%
201
– –
66 67
68
69 70

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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.