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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
-3.16%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+512.03%
AUM
$34.9B
AUM Growth
-$2.36B
Cap. Flow
-$465K
Cap. Flow %
-0%
Top 10 Hldgs %
25.64%
Holding
2,019
New
132
Increased
799
Reduced
746
Closed
97

Top Buys

Rank Stock Value
1
RSP icon
Invesco S&P 500 Equal Weight ETF
RSP
+$224M
2
VEU icon
Vanguard FTSE All-World ex-US ETF
VEU
+$113M
3
PWR icon
Quanta Services
PWR
+$75M
4
GLD icon
SPDR Gold Trust
GLD
+$58.9M
5
BA icon
Boeing
BA
+$55.5M

Top Sells

Rank Stock Value
1
WDAY icon
Workday
WDAY
+$91.2M
2
CWAN
Clearwater Analytics
CWAN
+$78M
3
APP icon
Applovin
APP
+$74.7M
4
TYL icon
Tyler Technologies
TYL
+$69.1M
5
UBER icon
Uber
UBER
+$62.2M

Sector Composition

Rank Sector Weight
1 Technology 21.79%
2 Industrials 14.2%
3 Financials 12.26%
4 Healthcare 10.59%
5 Consumer Discretionary 7.17%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
XSMO icon
1451
Invesco S&P SmallCap Momentum ETF
XSMO
$2.93B
$217K ﹤0.01%
2,852
+301
+12% +$23.2K
UMAC icon
1452
Unusual Machines
UMAC
$825M
$216K ﹤0.01%
17,450
+2,750
+19% +$41.9K
ABCB icon
1453
Ameris Bancorp
ABCB
$5.9B
$216K ﹤0.01%
2,770
-94
-3% -$7.46K
IGF icon
1454
iShares Global Infrastructure ETF
IGF
$10.9B
$216K ﹤0.01%
3,217
-154
-5% -$10.1K
INV
1455
Innventure Inc
INV
$238M
$215K ﹤0.01%
+55,046
New +$194K
CODI icon
1456
Compass Diversified
CODI
$754M
$215K ﹤0.01%
27,318
+847
+3% +$5.39K
INDB icon
1457
Independent Bank
INDB
$4.04B
$214K ﹤0.01%
2,841
+48
+2% +$3.76K
INDA icon
1458
iShares MSCI India ETF
INDA
$6.81B
$213K ﹤0.01%
4,557
-553
-11% -$28.3K
MLPX icon
1459
Global X MLP & Energy Infrastructure ETF
MLPX
$3.59B
$213K ﹤0.01%
2,880
-1,585
-35% -$108K
VMD icon
1460
Viemed Healthcare
VMD
$447M
$212K ﹤0.01%
23,023
+23
+0.1% +$191
ZNOV
1461
Innovator Equity Defined Protection ETF - 1 Yr November
ZNOV
$104M
$212K ﹤0.01%
7,968
-73,707
-90% -$1.97M
KDP icon
1462
Keurig Dr Pepper
KDP
$42.8B
$211K ﹤0.01%
+8,024
New +$225K
ETHO icon
1463
Amplify Etho Climate Leadership US ETF
ETHO
$185M
$211K ﹤0.01%
3,194
+944
+42% +$64.2K
VRIG icon
1464
Invesco Variable Rate Investment Grade ETF
VRIG
$1.8B
$210K ﹤0.01%
8,403
-468
-5% -$11.8K
SPYD icon
1465
State Street SPDR Portfolio S&P 500 High Dividend ETF
SPYD
$7.76B
$210K ﹤0.01%
4,619
+1,155
+33% +$53.1K
LOPE icon
1466
Grand Canyon Education
LOPE
$4.23B
$210K ﹤0.01%
1,236
-716
-37% -$120K
ASGI
1467
abrdn Global Infrastructure Income Fund
ASGI
$740M
$210K ﹤0.01%
9,392
– –
TDY icon
1468
Teledyne Technologies
TDY
$29.2B
$208K ﹤0.01%
+344
New +$215K
ON icon
1469
ON Semiconductor
ON
$30.7B
$208K ﹤0.01%
+3,358
New +$211K
IDCC icon
1470
InterDigital
IDCC
$6.75B
$207K ﹤0.01%
684
+21
+3% +$7.14K
UGA icon
1471
United States Gasoline Fund
UGA
$146M
$207K ﹤0.01%
+2,000
New +$154K
WRAP icon
1472
Wrap Technologies
WRAP
$90.9M
$205K ﹤0.01%
+133,333
New +$263K
LBRDK icon
1473
Liberty Broadband Class C
LBRDK
$4.89B
$204K ﹤0.01%
4,055
-28
-0.7% -$1.41K
TDIV icon
1474
First Trust NASDAQ Technology Dividend Index Fund
TDIV
$4.05B
$204K ﹤0.01%
2,175
-241
-10% -$23.5K
LUMN icon
1475
Lumen
LUMN
$6.43B
$203K ﹤0.01%
29,246
-10,568
-27% -$80K
57 58
59
60 61

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William Blair & Company's Q1 2026 Portfolio in Review

As of Q1 2026, William Blair & Company held 2,019 positions worth $34.9B, down 6.3% from $37.3B the previous quarter. Its ten largest holdings account for 26% of the portfolio.

William Blair & Company's Q1 2026 filing shows 132 new, 799 increased, 746 reduced and 97 closed positions. Its largest new stake was Silicon Motion: 103,179 shares worth $11.6M. The largest sale was Workday, an estimated $91.2M.

By sector, the portfolio is most concentrated in Technology at 22% of assets, down from 26% a quarter earlier, followed by Industrials and Financials.

  • William Blair & Company's largest Q1 2026 buy was Silicon Motion: 103,179 shares worth $11.6M.
  • William Blair & Company added most to Invesco S&P 500 Equal Weight ETF in Q1 2026, an estimated $224M increase.
  • William Blair & Company's biggest Q1 2026 reduction was Workday, cutting an estimated $91.2M.
  • William Blair & Company fully exited Dynavax Technologies in Q1 2026, selling an estimated $27.4M.
  • William Blair & Company's ten largest holdings make up 26% of its $34.9B portfolio in Q1 2026.
  • William Blair & Company opened 132 new positions and closed 97 in Q1 2026.
  • William Blair & Company's portfolio value fell 6.3% quarter-over-quarter to $34.9B.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.