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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
HYG icon
551
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.9B
$4.08M 0.01%
51,881
+6,350
+14% +$504K
SHEL icon
552
Shell
SHEL
$248B
$4.06M 0.01%
64,795
-1,849
-3% -$121K
IGSB icon
553
iShares 1-5 Year Investment Grade Corporate Bond ETF
IGSB
$23.4B
$4.05M 0.01%
78,397
+13,425
+21% +$698K
ODFL icon
554
Old Dominion Freight Line
ODFL
$45.1B
$4.04M 0.01%
22,922
-6,339
-22% -$1.29M
MOAT icon
555
VanEck Morningstar Wide Moat ETF
MOAT
$12.4B
$3.97M 0.01%
42,772
+378
+0.9% +$36.4K
SCHA icon
556
Schwab U.S Small- Cap ETF
SCHA
$23.5B
$3.96M 0.01%
153,082
+27,160
+22% +$723K
PAPR icon
557
Innovator US Equity Power Buffer ETF April
PAPR
$962M
$3.93M 0.01%
107,177
– –
SUB icon
558
iShares Short-Term National Muni Bond ETF
SUB
$11.4B
$3.9M 0.01%
36,954
-6,853
-16% -$724K
QUAL icon
559
iShares MSCI USA Quality Factor ETF
QUAL
$48.2B
$3.89M 0.01%
21,840
+3,305
+18% +$600K
VTEB icon
560
Vanguard Tax-Exempt Bond Index Fund
VTEB
$46.1B
$3.84M 0.01%
76,670
+726
+1% +$36.7K
IP icon
561
International Paper
IP
$21.8B
$3.84M 0.01%
71,350
-873
-1% -$46.8K
TTE icon
562
TotalEnergies
TTE
$193B
$3.84M 0.01%
70,456
+3,592
+5% +$218K
JOBY icon
563
Joby Aviation
JOBY
$7.89B
$3.81M 0.01%
468,181
+440,991
+1,622% +$2.92M
DGRO icon
564
iShares Core Dividend Growth ETF
DGRO
$43.8B
$3.8M 0.01%
62,003
-1,106
-2% -$69.8K
PHM icon
565
Pultegroup
PHM
$24.8B
$3.72M 0.01%
34,157
-81
-0.2% -$10.5K
KRE icon
566
State Street SPDR S&P Regional Banking ETF
KRE
$4.67B
$3.71M 0.01%
61,526
+58,089
+1,690% +$3.6M
WELL icon
567
Welltower
WELL
$169B
$3.68M 0.01%
29,214
-185
-0.6% -$24.3K
UNF icon
568
Unifirst Corp
UNF
$5.22B
$3.67M 0.01%
21,442
– –
IWY icon
569
iShares Russell Top 200 Growth ETF
IWY
$16.7B
$3.67M 0.01%
15,588
+619
+4% +$142K
PHR icon
570
Phreesia
PHR
$760M
$3.66M 0.01%
145,450
-534,524
-79% -$11.4M
AZO icon
571
AutoZone
AZO
$49.7B
$3.65M 0.01%
1,141
-352
-24% -$1.11M
TOL icon
572
Toll Brothers
TOL
$13.9B
$3.65M 0.01%
29,009
+10,140
+54% +$1.51M
AEP icon
573
American Electric Power
AEP
$68B
$3.65M 0.01%
39,597
+663
+2% +$64.2K
SPG icon
574
Simon Property Group
SPG
$71.9B
$3.65M 0.01%
21,188
+1,202
+6% +$211K
MRCC
575
DELISTED
Monroe Capital Corp
MRCC
$3.64M 0.01%
428,187
+1,735
+0.4% +$14.3K
21 22
23
24 25

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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.