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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
RVNC
1326
DELISTED
Revance Therapeutics, Inc.
RVNC
$268K ﹤0.01%
88,295
+2,297
+3% +$10K
CHTR icon
1327
Charter Communications
CHTR
$18.2B
$267K ﹤0.01%
780
-1,111
-59% -$402K
ON icon
1328
ON Semiconductor
ON
$32.7B
$267K ﹤0.01%
4,239
+1,463
+53% +$101K
CORT icon
1329
Corcept Therapeutics
CORT
$12.1B
$265K ﹤0.01%
5,250
– –
BFC icon
1330
Bank First Corp
BFC
$1.76B
$264K ﹤0.01%
2,669
– –
BTBT icon
1331
Bit Digital
BTBT
$530M
$264K ﹤0.01%
+90,000
New +$354K
USIG icon
1332
iShares Broad USD Investment Grade Corporate Bond ETF
USIG
$17.4B
$263K ﹤0.01%
5,239
+1,847
+54% +$94.6K
LITE icon
1333
Lumentum
LITE
$81.8B
$263K ﹤0.01%
+3,131
New +$244K
XAR icon
1334
State Street SPDR S&P Aerospace & Defense ETF
XAR
$6.56B
$262K ﹤0.01%
1,578
– –
ICVT icon
1335
iShares Convertible Bond ETF
ICVT
$7.65B
$261K ﹤0.01%
3,077
+575
+23% +$49.5K
IONQ icon
1336
IonQ
IONQ
$18.4B
$260K ﹤0.01%
+6,219
New +$156K
AB icon
1337
AllianceBernstein
AB
$3.38B
$259K ﹤0.01%
6,989
– –
POR icon
1338
Portland General Electric
POR
$5.91B
$258K ﹤0.01%
5,925
+692
+13% +$32.2K
AIT icon
1339
Applied Industrial Technologies
AIT
$13.1B
$258K ﹤0.01%
1,079
– –
ALLE icon
1340
Allegion
ALLE
$13.9B
$258K ﹤0.01%
1,973
-104
-5% -$14.7K
EQNR icon
1341
Equinor
EQNR
$96.2B
$258K ﹤0.01%
10,883
-391
-3% -$9.4K
PDSB icon
1342
PDS Biotechnology
PDSB
$13.4M
$257K ﹤0.01%
157,500
+35,757
+29% +$94.6K
SCS
1343
DELISTED
Steelcase
SCS
$256K ﹤0.01%
21,659
-585
-3% -$7.53K
EVEX icon
1344
Eve Holding
EVEX
$958M
$256K ﹤0.01%
47,017
– –
NIC icon
1345
Nicolet Bankshares
NIC
$3.76B
$256K ﹤0.01%
2,437
– –
MDYV icon
1346
State Street SPDR S&P 400 Mid Cap Value ETF
MDYV
$2.88B
$256K ﹤0.01%
3,186
– –
EVTC icon
1347
Evertec
EVTC
$1.86B
$254K ﹤0.01%
7,356
-1,109
-13% -$38.1K
IDA icon
1348
Idacorp
IDA
$8.15B
$253K ﹤0.01%
2,316
-2,039
-47% -$224K
OC icon
1349
Owens Corning
OC
$12.4B
$253K ﹤0.01%
1,483
-1
-0.1% -$187
GNR icon
1350
State Street SPDR S&P Global Natural Resources ETF
GNR
$4.9B
$252K ﹤0.01%
5,063
-5,535
-52% -$303K
52 53
54
55 56

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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.