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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
+19.08%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+606.62%
AUM
$38.4B
AUM Growth
+$3.49B
Cap. Flow
-$792M
Cap. Flow %
-2.06%
Top 10 Hldgs %
26.32%
Holding
2,083
New
163
Increased
891
Reduced
708
Closed
85

Top Buys

Rank Stock Value
1
HONA
Honeywell Aerospace
HONA
+$100M
2
ANET icon
Arista Networks
ANET
+$71.2M
3
RSP icon
Invesco S&P 500 Equal Weight ETF
RSP
+$61.8M
4
VTI icon
Vanguard Morningstar Total Stock Market ETF
VTI
+$55.8M
5
MIAX
Miami International Holdings
MIAX
+$49.4M

Top Sells

Rank Stock Value
1
XOM icon
ExxonMobil
XOM
+$161M
2
CPRT icon
Copart
CPRT
+$62M
3
DHR icon
Danaher
DHR
+$59.1M
4
AAPL icon
Apple
AAPL
+$57M
5
VEEV icon
Veeva Systems
VEEV
+$52.2M

Sector Composition

Rank Sector Weight
1 Technology 24.38%
2 Miscellaneous 18.67%
3 Industrials 15.24%
4 Financials 11.07%
5 Healthcare 9.11%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EZU icon
1326
iShare MSCI Eurozone ETF
EZU
$9.59B
$375K ﹤0.01%
5,396
-527
-9% -$35.5K
MDYV icon
1327
State Street SPDR S&P 400 Mid Cap Value ETF
MDYV
$2.77B
$375K ﹤0.01%
3,949
– –
NCLH icon
1328
Norwegian Cruise Line
NCLH
$6.56B
$374K ﹤0.01%
17,706
+3,284
+23% +$61.3K
SR icon
1329
Spire
SR
$4.73B
$373K ﹤0.01%
4,782
+118
+3% +$10.1K
IYZ icon
1330
iShares US Telecommunications ETF
IYZ
$1.22B
$371K ﹤0.01%
8,778
+22
+0.3% +$934
VNT icon
1331
Vontier
VNT
$4.37B
$370K ﹤0.01%
12,768
+7
+0.1% +$224
OII icon
1332
Oceaneering
OII
$4.76B
$369K ﹤0.01%
9,118
-792
-8% -$29.9K
VITL icon
1333
Vital Farms
VITL
$429M
$369K ﹤0.01%
31,735
-59,280
-65% -$661K
FAF icon
1334
First American
FAF
$7.36B
$368K ﹤0.01%
5,362
+107
+2% +$7.13K
JMUB icon
1335
JPMorgan Municipal ETF
JMUB
$8.46B
$368K ﹤0.01%
7,259
+1,005
+16% +$50.6K
BALL icon
1336
Ball Corp
BALL
$16B
$366K ﹤0.01%
5,872
+1,110
+23% +$65.3K
NDSN icon
1337
Nordson
NDSN
$17.2B
$365K ﹤0.01%
+1,211
New +$344K
RGEN icon
1338
Repligen
RGEN
$9.84B
$365K ﹤0.01%
+2,675
New +$329K
FUTY icon
1339
Fidelity MSCI Utilities Index ETF
FUTY
$2.2B
$364K ﹤0.01%
6,235
+525
+9% +$30.7K
VNQI icon
1340
Vanguard Global ex-US Real Estate ETF
VNQI
$3.36B
$362K ﹤0.01%
8,065
+123
+2% +$5.67K
TFPM icon
1341
Triple Flag Precious Metals
TFPM
$6.68B
$362K ﹤0.01%
12,066
+66
+0.6% +$2.12K
FNB icon
1342
FNB Corp
FNB
$6.49B
$359K ﹤0.01%
+18,824
New +$335K
CHH icon
1343
Choice Hotels
CHH
$4.41B
$359K ﹤0.01%
+3,254
New +$360K
EMB icon
1344
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$14.2B
$359K ﹤0.01%
3,718
-156
-4% -$14.9K
RL icon
1345
Ralph Lauren
RL
$19.9B
$358K ﹤0.01%
892
-1,117
-56% -$416K
IPX
1346
IperionX
IPX
$647M
$358K ﹤0.01%
+12,036
New +$410K
USO icon
1347
United States Oil Fund
USO
$2.34B
$358K ﹤0.01%
3,361
-1,668
-33% -$219K
ASB icon
1348
Associated Banc-Corp
ASB
$5.69B
$357K ﹤0.01%
+11,607
New +$327K
MIDD icon
1349
Middleby
MIDD
$5.11B
$356K ﹤0.01%
2,068
+223
+12% +$33.6K
FORM icon
1350
FormFactor
FORM
$7.89B
$354K ﹤0.01%
2,213
-931
-30% -$124K
52 53
54
55 56

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William Blair & Company's Q2 2026 Portfolio in Review

As of Q2 2026, William Blair & Company held 2,083 positions worth $38.4B, up 10% from $34.9B the previous quarter. Its ten largest holdings account for 26% of the portfolio.

William Blair & Company's Q2 2026 filing shows 163 new, 891 increased, 708 reduced and 85 closed positions. Its largest new stake was Honeywell Aerospace: 454,071 shares worth $100M. The largest sale was ExxonMobil, an estimated $161M.

By sector, the portfolio is most concentrated in Technology at 24% of assets, up from 22% a quarter earlier, followed by Miscellaneous and Industrials.

  • William Blair & Company's largest Q2 2026 buy was Honeywell Aerospace: 454,071 shares worth $100M.
  • William Blair & Company added most to Arista Networks in Q2 2026, an estimated $71.2M increase.
  • William Blair & Company's biggest Q2 2026 reduction was Copart, cutting an estimated $62M.
  • William Blair & Company fully exited ExxonMobil in Q2 2026, selling an estimated $161M.
  • William Blair & Company's ten largest holdings make up 26% of its $38.4B portfolio in Q2 2026.
  • William Blair & Company opened 163 new positions and closed 85 in Q2 2026.
  • William Blair & Company's portfolio value rose 10% quarter-over-quarter to $38.4B.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.