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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
AUTL
1651
Autolus Therapeutics
AUTL
$564M
$30.1K ﹤0.01%
12,794
-2,138
-14% -$7.23K
IBDT icon
1652
iShares iBonds Dec 2028 Term Corporate ETF
IBDT
$4.07B
$30.1K ﹤0.01%
1,207
– –
CNYA icon
1653
iShares MSCI China A ETF
CNYA
$208M
$29.9K ﹤0.01%
1,073
– –
EEMS icon
1654
iShares MSCI Emerging Markets Small-Cap ETF
EEMS
$379M
$29.1K ﹤0.01%
500
– –
CYPH
1655
Cypherpunk Technologies Inc
CYPH
$70M
$28.8K ﹤0.01%
10,000
– –
PIII icon
1656
P3 Health Partners
PIII
$38.9M
$28.3K ﹤0.01%
2,517
– –
SCHJ icon
1657
Schwab 1-5 Year Corporate Bond ETF
SCHJ
$848M
$27.6K ﹤0.01%
+1,131
New +$27.7K
SCHZ icon
1658
Schwab US Aggregate Bond ETF
SCHZ
$10.5B
$27.6K ﹤0.01%
1,214
+132
+12% +$3.05K
GCMGW
1659
DELISTED
GCM Grosvenor Inc Warrant
GCMGW
$27.5K ﹤0.01%
21,790
+3,000
+16% +$3.24K
GEF.B icon
1660
Greif Class B
GEF.B
$4.24B
$27.1K ﹤0.01%
400
– –
IBTF
1661
DELISTED
iShares iBonds Dec 2025 Term Treasury ETF
IBTF
$26.9K ﹤0.01%
1,153
– –
PBE icon
1662
Invesco Biotechnology & Genome ETF
PBE
$358M
$26.6K ﹤0.01%
400
– –
IBTI icon
1663
iShares iBonds Dec 2028 Term Treasury ETF
IBTI
$1.93B
$26.5K ﹤0.01%
1,210
– –
SGOV icon
1664
iShares 0-3 Month Treasury Bond ETF
SGOV
$101B
$24.9K ﹤0.01%
248
-63
-20% -$6.33K
OUSA icon
1665
ALPS O'Shares U.S. Quality Dividend ETF
OUSA
$758M
$24.7K ﹤0.01%
466
+2
+0.4% +$108
PXF icon
1666
Invesco FTSE RAFI Developed Markets ex-US ETF
PXF
$2.97B
$24.4K ﹤0.01%
510
– –
SBDS
1667
DELISTED
Solo Brands Inc
SBDS
$23.9K ﹤0.01%
525
– –
IFGL icon
1668
iShares International Developed Real Estate ETF
IFGL
$82.2M
$23.6K ﹤0.01%
1,223
-100
-8% -$2.07K
PCEF icon
1669
Invesco CEF Income Composite ETF
PCEF
$818M
$23.3K ﹤0.01%
+1,214
New +$23.7K
FIW icon
1670
First Trust Water ETF
FIW
$1.92B
$22.6K ﹤0.01%
221
– –
IXG icon
1671
iShares Global Financials ETF
IXG
$698M
$22.1K ﹤0.01%
230
– –
XTL icon
1672
State Street SPDR S&P Telecom ETF
XTL
$558M
$22.1K ﹤0.01%
206
+27
+15% +$2.86K
REKR icon
1673
Rekor Systems
REKR
$94M
$21.8K ﹤0.01%
14,000
-580
-4% -$602
REGL icon
1674
ProShares S&P MidCap 400 Dividend Aristocrats ETF
REGL
$1.81B
$21.6K ﹤0.01%
+268
New +$22.3K
OVID icon
1675
Ovid Therapeutics
OVID
$489M
$21.5K ﹤0.01%
23,039
-9,000
-28% -$10.1K
65 66
67
68 69

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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.