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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
JNK icon
1626
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.31B
$39.5K ﹤0.01%
414
-133
-24% -$12.8K
SPMB icon
1627
State Street SPDR Portfolio Mortgage Backed Bond ETF
SPMB
$7.05B
$39.2K ﹤0.01%
1,820
+1,437
+375% +$31.5K
EWZ icon
1628
iShares MSCI Brazil ETF
EWZ
$8.57B
$38.3K ﹤0.01%
1,700
– –
BALT icon
1629
Innovator Defined Wealth Shield ETF
BALT
$2.8B
$37.7K ﹤0.01%
+1,200
New +$37.4K
HTZ icon
1630
Hertz
HTZ
$998M
$36.7K ﹤0.01%
10,032
-1,305
-12% -$4.72K
FNOV icon
1631
FT Vest US Equity Buffer ETF November
FNOV
$1.24B
$35.9K ﹤0.01%
750
– –
DES icon
1632
WisdomTree US SmallCap Dividend Fund
DES
$2.22B
$35.5K ﹤0.01%
1,034
– –
IHF icon
1633
iShares US Healthcare Providers ETF
IHF
$1.27B
$34.3K ﹤0.01%
715
-75
-9% -$3.96K
BA.PRA
1634
Boeing Co 6.00% Series A Preferred Stock
BA.PRA
$8.19B
$34.2K ﹤0.01%
+562
New +$31.7K
RWX icon
1635
State Street SPDR Dow Jones International Real Estate ETF
RWX
$267M
$34.1K ﹤0.01%
1,479
-2,677
-64% -$66.6K
KBE icon
1636
State Street SPDR S&P Bank ETF
KBE
$1.74B
$34.1K ﹤0.01%
614
-3,687
-86% -$211K
STPZ icon
1637
PIMCO 1-5 Year US TIPS Index Exchange-Traded Fund
STPZ
$524M
$33.7K ﹤0.01%
645
– –
CSD icon
1638
Invesco S&P Spin-Off ETF
CSD
$232M
$33.7K ﹤0.01%
410
– –
JPEF icon
1639
JPMorgan Equity Focus ETF
JPEF
$2.06B
$33.6K ﹤0.01%
+500
New +$33.8K
EWG icon
1640
iShares MSCI Germany ETF
EWG
$1.67B
$33.3K ﹤0.01%
1,048
-90
-8% -$2.92K
PSQ icon
1641
ProShares Short QQQ
PSQ
$642M
$33.2K ﹤0.01%
888
+5
+0.6% +$191
ALLK
1642
DELISTED
Allakos
ALLK
$33.1K ﹤0.01%
27,317
-32,500
-54% -$34.1K
SMOG icon
1643
VanEck Low Carbon Energy ETF
SMOG
$136M
$33K ﹤0.01%
334
+5
+2% +$519
DFJ icon
1644
WisdomTree Japan SmallCap Dividend Fund
DFJ
$402M
$32.9K ﹤0.01%
438
– –
LCID icon
1645
Lucid Motors
LCID
$2.58B
$32.2K ﹤0.01%
1,066
-2,355
-69% -$61.3K
RWR icon
1646
State Street SPDR Dow Jones REIT ETF
RWR
$1.87B
$32.1K ﹤0.01%
325
-374
-54% -$38.9K
VGLT icon
1647
Vanguard Long-Term Treasury ETF
VGLT
$10.3B
$32K ﹤0.01%
578
+260
+82% +$15.1K
FDLO icon
1648
Fidelity Low Volatility Factor ETF
FDLO
$1.45B
$30.8K ﹤0.01%
508
– –
IGM icon
1649
iShares Expanded Tech Sector ETF
IGM
$10.8B
$30.6K ﹤0.01%
300
– –
HYS icon
1650
PIMCO 0-5 Year High Yield Corporate Bond Index Exchange-Traded Fund
HYS
$1.77B
$30.4K ﹤0.01%
324
– –
64 65
66
67 68

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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.