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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
TMUS icon
676
T-Mobile US
TMUS
$195B
$2.32M 0.01%
10,532
-135
-1% -$30.7K
F icon
677
Ford
F
$55.3B
$2.32M 0.01%
233,946
-60,859
-21% -$649K
AMG icon
678
Affiliated Managers Group
AMG
$9.65B
$2.3M 0.01%
12,449
-44
-0.4% -$8.21K
NAPR icon
679
Innovator Growth-100 Power Buffer ETF April
NAPR
$213M
$2.3M 0.01%
45,577
-1,327
-3% -$66K
SCHX icon
680
Schwab US Large- Cap ETF
SCHX
$74.9B
$2.29M 0.01%
98,808
+1,824
+2% +$42.5K
KBWB icon
681
Invesco KBW Bank ETF
KBWB
$6.85B
$2.29M 0.01%
35,031
+34,601
+8,047% +$2.26M
SSNC icon
682
SS&C Technologies
SSNC
$18.9B
$2.28M 0.01%
30,144
-3,658
-11% -$274K
SPSM icon
683
State Street SPDR Portfolio S&P 600 Small Cap ETF
SPSM
$17.6B
$2.28M 0.01%
50,738
+2,781
+6% +$129K
BECN
684
DELISTED
Beacon Roofing Supply, Inc.
BECN
$2.27M 0.01%
22,333
+956
+4% +$96.4K
BIDU icon
685
Baidu
BIDU
$35.3B
$2.26M 0.01%
26,779
-228
-0.8% -$20.8K
SCHO icon
686
Schwab Short-Term US Treasury ETF
SCHO
$13B
$2.25M 0.01%
93,343
-1,855
-2% -$44.9K
VLUE icon
687
iShares MSCI USA Value Factor ETF
VLUE
$9.73B
$2.24M 0.01%
21,194
+60
+0.3% +$6.6K
IMCG icon
688
iShares Morningstar Mid-Cap Growth ETF
IMCG
$4.17B
$2.23M 0.01%
29,565
+3,788
+15% +$290K
QQQM icon
689
Invesco NASDAQ 100 ETF
QQQM
$104B
$2.22M 0.01%
10,555
+2,638
+33% +$549K
SCHR
690
Schwab Intermediately-Term US Treasury ETF
SCHR
$13.4B
$2.21M 0.01%
90,941
+12,141
+15% +$299K
WAY
691
Waystar Holding Corp
WAY
$4.68B
$2.19M 0.01%
59,542
+14,000
+31% +$430K
PPG icon
692
PPG Industries
PPG
$25.5B
$2.18M 0.01%
18,214
+5,276
+41% +$660K
CHRW icon
693
C.H. Robinson
CHRW
$17.6B
$2.17M 0.01%
21,049
-886
-4% -$95.3K
KJUL icon
694
Innovator US Small Cap Power Buffer ETF July
KJUL
$227M
$2.16M 0.01%
73,482
-1,679
-2% -$49.7K
GMS
695
DELISTED
GMS Inc
GMS
$2.16M 0.01%
25,420
– –
AGCO icon
696
AGCO
AGCO
$6.98B
$2.15M 0.01%
22,967
-33,654
-59% -$3.26M
GAIN icon
697
Gladstone Investment Corp
GAIN
$658M
$2.14M 0.01%
161,745
+4,552
+3% +$62.2K
BND icon
698
Vanguard Total Bond Market
BND
$161B
$2.13M 0.01%
29,638
+3,103
+12% +$227K
BMRN icon
699
BioMarin Pharmaceuticals
BMRN
$13.3B
$2.13M 0.01%
32,342
-2,174
-6% -$146K
NTAP icon
700
NetApp
NTAP
$40.1B
$2.1M 0.01%
18,051
-683
-4% -$83.5K
26 27
28
29 30

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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.