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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
EZU icon
1476
iShare MSCI Eurozone ETF
EZU
$9.93B
$158K ﹤0.01%
3,339
– –
PCY icon
1477
Invesco Emerging Markets Sovereign Debt ETF
PCY
$1.39B
$153K ﹤0.01%
7,718
+402
+5% +$8.3K
CERT icon
1478
Certara
CERT
$1.22B
$152K ﹤0.01%
14,299
-16
-0.1% -$174
SCHK icon
1479
Schwab 1000 Index ETF
SCHK
$5.94B
$152K ﹤0.01%
5,376
+4,576
+572% +$130K
FLRN icon
1480
State Street SPDR Bloomberg Investment Grade Floating Rate ETF
FLRN
$2.97B
$152K ﹤0.01%
4,951
+217
+5% +$6.67K
IDEV icon
1481
iShares Core MSCI International Developed Markets ETF
IDEV
$32.7B
$151K ﹤0.01%
2,341
-399
-15% -$26.9K
JMBS icon
1482
Janus Henderson Mortgage-Backed Securities ETF
JMBS
$6.74B
$149K ﹤0.01%
3,376
+11
+0.3% +$496
FNCL icon
1483
Fidelity MSCI Financials Index ETF
FNCL
$2.42B
$147K ﹤0.01%
2,138
+1,250
+141% +$85.9K
XMLV icon
1484
Invesco S&P MidCap Low Volatility ETF
XMLV
$743M
$147K ﹤0.01%
2,410
-440
-15% -$27.5K
MKC.V icon
1485
McCormick & Company Voting
MKC.V
$14.2B
$146K ﹤0.01%
1,921
– –
FV icon
1486
First Trust Dorsey Wright Focus 5 ETF
FV
$3.8B
$145K ﹤0.01%
2,458
+1
+0% +$60
GMF icon
1487
State Street SPDR S&P Emerging Asia Pacific ETF
GMF
$440M
$145K ﹤0.01%
1,255
– –
RGT
1488
Royce Global Value Trust
RGT
$101M
$145K ﹤0.01%
13,520
– –
IEO icon
1489
iShares US Oil & Gas Exploration & Production ETF
IEO
$587M
$145K ﹤0.01%
1,614
+869
+117% +$81.8K
BDSX icon
1490
Biodesix
BDSX
$256M
$142K ﹤0.01%
4,655
+485
+12% +$14.3K
NVRO
1491
DELISTED
NEVRO CORP.
NVRO
$141K ﹤0.01%
37,829
-9,675
-20% -$44.7K
OPPE
1492
WisdomTree European Opportunities Fund
OPPE
$295M
$140K ﹤0.01%
3,650
-50
-1% -$1.91K
SPHD icon
1493
Invesco S&P 500 High Dividend Low Volatility ETF
SPHD
$3.39B
$139K ﹤0.01%
2,883
-149
-5% -$7.45K
REAX icon
1494
Real Brokerage
REAX
$508M
$138K ﹤0.01%
30,000
+5,000
+20% +$26.2K
IEV icon
1495
iShares Europe ETF
IEV
$1.7B
$137K ﹤0.01%
2,622
-400
-13% -$21.9K
UPRO icon
1496
ProShares UltraPro S&P 500
UPRO
$5.74B
$135K ﹤0.01%
+1,522
New +$139K
IVOV icon
1497
Vanguard S&P Mid-Cap 400 Value ETF
IVOV
$1.37B
$134K ﹤0.01%
1,400
– –
CWI icon
1498
State Street SPDR MSCI ACWI ex-US ETF
CWI
$2.87B
$131K ﹤0.01%
4,702
+655
+16% +$19.1K
AVPT icon
1499
AvePoint
AVPT
$2.75B
$125K ﹤0.01%
7,563
+1,500
+25% +$22.8K
VIOG icon
1500
Vanguard S&P Small-Cap 600 Growth ETF
VIOG
$1.13B
$124K ﹤0.01%
1,065
– –
58 59
60
61 62

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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.