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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
BRKL
1201
DELISTED
Brookline Bancorp
BRKL
$368K ﹤0.01%
31,210
– –
TLTD icon
1202
FlexShares Morningstar Developed Markets ex-US Factor Tilt Index Fund
TLTD
$690M
$368K ﹤0.01%
5,338
-281
-5% -$20.1K
TCOM icon
1203
Trip.com Group
TCOM
$28.3B
$367K ﹤0.01%
5,349
+219
+4% +$14.5K
ZION icon
1204
Zions Bancorporation
ZION
$10.5B
$364K ﹤0.01%
6,713
+303
+5% +$16.6K
LOPE icon
1205
Grand Canyon Education
LOPE
$3.79B
$364K ﹤0.01%
+2,223
New +$341K
CCEP icon
1206
Coca-Cola Europacific Partners
CCEP
$47.5B
$364K ﹤0.01%
4,734
-126
-3% -$9.73K
DOC icon
1207
Healthpeak Properties
DOC
$14.3B
$363K ﹤0.01%
17,916
+6,810
+61% +$148K
OLED icon
1208
Universal Display
OLED
$4.18B
$363K ﹤0.01%
2,483
-21
-0.8% -$3.74K
GME icon
1209
GameStop
GME
$8.33B
$363K ﹤0.01%
11,576
-3,363
-23% -$86.3K
SSTI icon
1210
SoundThinking
SSTI
$107M
$363K ﹤0.01%
27,778
-13,048
-32% -$157K
MTN icon
1211
Vail Resorts
MTN
$5.18B
$359K ﹤0.01%
1,916
-2,852
-60% -$510K
CM icon
1212
Canadian Imperial Bank of Commerce
CM
$112B
$358K ﹤0.01%
5,658
+383
+7% +$24.3K
JMUB icon
1213
JPMorgan Municipal ETF
JMUB
$8.52B
$356K ﹤0.01%
7,100
+600
+9% +$30.4K
MRTN icon
1214
Marten Transport
MRTN
$1.24B
$356K ﹤0.01%
22,800
– –
TDVG icon
1215
T. Rowe Price Dividend Growth ETF
TDVG
$1.45B
$355K ﹤0.01%
8,961
+1,685
+23% +$68.7K
VOX icon
1216
Vanguard Communication Services ETF
VOX
$5.88B
$355K ﹤0.01%
2,289
-19
-0.8% -$2.9K
IPAY icon
1217
Amplify Mobile Payments ETF
IPAY
$188M
$355K ﹤0.01%
6,115
– –
SLAB icon
1218
Silicon Laboratories
SLAB
$7.28B
$354K ﹤0.01%
2,850
– –
KEY icon
1219
KeyCorp
KEY
$24.6B
$354K ﹤0.01%
20,651
-1,310
-6% -$23.5K
XMMO icon
1220
Invesco S&P MidCap Momentum ETF
XMMO
$7.61B
$353K ﹤0.01%
2,855
+1,355
+90% +$172K
SLYG icon
1221
State Street SPDR S&P 600 Small Cap Growth ETF
SLYG
$5.23B
$352K ﹤0.01%
3,901
+31
+0.8% +$2.93K
EMLP icon
1222
First Trust North American Energy Infrastructure Fund
EMLP
$4.16B
$352K ﹤0.01%
9,883
-973
-9% -$34.5K
NCDL icon
1223
Nuveen Churchill Direct Lending
NCDL
$623M
$352K ﹤0.01%
20,965
+10,484
+100% +$180K
UCTT
1224
Ultra Clean Holdings
UCTT
$4.21B
$351K ﹤0.01%
+9,775
New +$361K
RELX icon
1225
RELX
RELX
$60.4B
$350K ﹤0.01%
7,711
-128
-2% -$5.99K
47 48
49
50 51

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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.