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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
QUS icon
1451
State Street SPDR MSCI USA StrategicFactors ETF
QUS
$1.58B
$179K ﹤0.01%
1,157
– –
QLD icon
1452
ProShares Ultra QQQ
QLD
$14.1B
$177K ﹤0.01%
+3,272
New +$175K
IXJ icon
1453
iShares Global Healthcare ETF
IXJ
$4.23B
$176K ﹤0.01%
2,051
+1
+0% +$92
CDXS icon
1454
Codexis
CDXS
$175M
$176K ﹤0.01%
36,830
– –
IYG icon
1455
iShares US Financial Services ETF
IYG
$2.22B
$175K ﹤0.01%
2,255
-72
-3% -$5.55K
ITUB icon
1456
Itaú Unibanco
ITUB
$81.6B
$175K ﹤0.01%
40,030
-6,948
-15% -$35.8K
TDIV icon
1457
First Trust NASDAQ Technology Dividend Index Fund
TDIV
$4.44B
$175K ﹤0.01%
2,225
– –
RPV icon
1458
Invesco S&P 500 Pure Value ETF
RPV
$1.73B
$173K ﹤0.01%
1,914
-95
-5% -$8.71K
COOK icon
1459
Traeger
COOK
$172M
$172K ﹤0.01%
1,439
-95
-6% -$14.6K
RSPF icon
1460
Invesco S&P 500 Equal Weight Financials ETF
RSPF
$309M
$170K ﹤0.01%
2,350
– –
PCT icon
1461
PureCycle Technologies
PCT
$1.44B
$169K ﹤0.01%
16,471
– –
OGN icon
1462
Organon & Co
OGN
$3.59B
$168K ﹤0.01%
11,275
-7,353
-39% -$120K
EWO icon
1463
iShares MSCI Austria ETF
EWO
$187M
$168K ﹤0.01%
8,000
-1,500
-16% -$32.2K
KELYA icon
1464
Kelly Services Class A
KELYA
$536M
$166K ﹤0.01%
11,944
+370
+3% +$6.24K
SPTL icon
1465
State Street SPDR Portfolio Long Term Treasury ETF
SPTL
$10.7B
$166K ﹤0.01%
6,357
+6,029
+1,838% +$165K
BAB icon
1466
Invesco Taxable Municipal Bond ETF
BAB
$1.01B
$166K ﹤0.01%
6,366
– –
IXC icon
1467
iShares Global Energy ETF
IXC
$2.74B
$165K ﹤0.01%
4,327
-208
-5% -$8.51K
UAA icon
1468
Under Armour
UAA
$2.26B
$164K ﹤0.01%
19,856
-450
-2% -$4.11K
LIT icon
1469
Global X Lithium & Battery Tech ETF
LIT
$1.61B
$164K ﹤0.01%
4,026
-1,645
-29% -$72.5K
VTRS icon
1470
Viatris
VTRS
$18.5B
$162K ﹤0.01%
12,993
-4,059
-24% -$49.9K
NWL icon
1471
Newell Brands
NWL
$2.62B
$162K ﹤0.01%
16,229
+1,176
+8% +$10.7K
EWX icon
1472
State Street SPDR S&P Emerging Markets Small Cap ETF
EWX
$702M
$162K ﹤0.01%
2,756
– –
TAK icon
1473
Takeda Pharmaceutical
TAK
$55.6B
$162K ﹤0.01%
12,199
+913
+8% +$12.5K
OABI icon
1474
OmniAb
OABI
$497M
$160K ﹤0.01%
45,171
-1,960
-4% -$7.75K
CGW icon
1475
Invesco S&P Global Water Index ETF
CGW
$1.07B
$158K ﹤0.01%
2,922
+471
+19% +$27.6K
57 58
59
60 61

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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.