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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
SHYG icon
1526
iShares 0-5 Year High Yield Corporate Bond ETF
SHYG
$7.61B
$156K ﹤0.01%
3,677
-5
-0.1% -$213
ONDS icon
1527
Ondas Inc
ONDS
$4.32B
$152K ﹤0.01%
16,831
+3,629
+27% +$39.5K
AMZA icon
1528
InfraCap MLP ETF
AMZA
$467M
$152K ﹤0.01%
+3,300
New +$144K
HEDJ icon
1529
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.84B
$152K ﹤0.01%
2,908
-2,412
-45% -$130K
EEMV icon
1530
iShares MSCI Emerging Markets Min Vol Factor ETF
EEMV
$3.45B
$149K ﹤0.01%
2,308
-579
-20% -$38.4K
DWM icon
1531
WisdomTree International Equity Fund
DWM
$681M
$146K ﹤0.01%
2,085
+4
+0.2% +$287
FHLC icon
1532
Fidelity MSCI Health Care Index ETF
FHLC
$3.3B
$146K ﹤0.01%
2,070
-99
-5% -$7.3K
IYY icon
1533
iShares Dow Jones US ETF
IYY
$2.93B
$144K ﹤0.01%
910
– –
NUSC icon
1534
Nuveen ESG Small-Cap ETF
NUSC
$1.28B
$144K ﹤0.01%
3,197
+44
+1% +$2.06K
GSIE icon
1535
Goldman Sachs ActiveBeta International Equity ETF
GSIE
$6.04B
$143K ﹤0.01%
3,310
+142
+4% +$6.31K
XIFR
1536
XPLR Infrastructure LP
XIFR
$1.12B
$142K ﹤0.01%
13,371
+31
+0.2% +$319
PCT icon
1537
PureCycle Technologies
PCT
$1.27B
$141K ﹤0.01%
27,154
-7,275
-21% -$60.6K
UGP icon
1538
Ultrapar
UGP
$6.9B
$139K ﹤0.01%
+25,279
New +$122K
ILCB icon
1539
iShares Morningstar US Equity ETF
ILCB
$1.26B
$137K ﹤0.01%
1,528
+776
+103% +$72.9K
EWY icon
1540
iShares MSCI South Korea ETF
EWY
$22.5B
$135K ﹤0.01%
1,098
+9
+0.8% +$1.13K
USIG icon
1541
iShares Broad USD Investment Grade Corporate Bond ETF
USIG
$17.3B
$134K ﹤0.01%
2,625
-3,357
-56% -$174K
DGS icon
1542
WisdomTree Emerging Markets SmallCap Dividend Fund
DGS
$1.69B
$134K ﹤0.01%
2,225
-18
-0.8% -$1.1K
VIOG icon
1543
Vanguard S&P Small-Cap 600 Growth ETF
VIOG
$1.05B
$133K ﹤0.01%
1,065
– –
KSS icon
1544
Kohl's
KSS
$2.21B
$131K ﹤0.01%
10,173
-158
-2% -$2.66K
EWZ icon
1545
iShares MSCI Brazil ETF
EWZ
$9.25B
$131K ﹤0.01%
3,405
+653
+24% +$23.9K
GIFT
1546
Giftify Inc
GIFT
$29.5M
$129K ﹤0.01%
128,553
+42,000
+49% +$41.1K
DSX icon
1547
Diana Shipping
DSX
$286M
$128K ﹤0.01%
51,367
+210
+0.4% +$482
QS icon
1548
QuantumScape Corp
QS
$3.22B
$128K ﹤0.01%
20,056
+9,906
+98% +$82.3K
SPYX icon
1549
State Street SPDR S&P 500 Fossil Fuel Reserves Free ETF
SPYX
$2.73B
$128K ﹤0.01%
2,408
+1,280
+113% +$71.4K
RPV icon
1550
Invesco S&P 500 Pure Value ETF
RPV
$1.65B
$127K ﹤0.01%
1,183
– –
60 61
62
63 64

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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.