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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
EPAM icon
1351
EPAM Systems
EPAM
$6.45B
$353K ﹤0.01%
4,443
-79
-2% -$8.35K
ATR icon
1352
AptarGroup
ATR
$7.89B
$350K ﹤0.01%
2,797
-877
-24% -$106K
MCY icon
1353
Mercury Insurance
MCY
$5.69B
$350K ﹤0.01%
3,279
+28
+0.9% +$2.76K
SANM icon
1354
Sanmina
SANM
$10.4B
$349K ﹤0.01%
1,380
-1,793
-57% -$393K
ALLY icon
1355
Ally Financial
ALLY
$12.4B
$349K ﹤0.01%
+7,596
New +$330K
PNFP icon
1356
Pinnacle Financial Partners Inc
PNFP
$15.1B
$348K ﹤0.01%
3,454
+296
+9% +$28.4K
TOTL icon
1357
State Street DoubleLine Total Return Tactical ETF
TOTL
$3.86B
$346K ﹤0.01%
8,763
– –
UMAC icon
1358
Unusual Machines
UMAC
$1.11B
$345K ﹤0.01%
15,450
-2,000
-11% -$37K
FXF icon
1359
Invesco CurrencyShares Swiss Franc Trust
FXF
$387M
$344K ﹤0.01%
3,159
– –
CCEP icon
1360
Coca-Cola Europacific Partners
CCEP
$45.6B
$344K ﹤0.01%
3,440
+126
+4% +$12K
PLOW icon
1361
Douglas Dynamics
PLOW
$912M
$344K ﹤0.01%
6,380
+90
+1% +$4.15K
FCBC icon
1362
First Community Bankshares
FCBC
$904M
$341K ﹤0.01%
7,681
+19
+0.2% +$816
STEP icon
1363
StepStone Group
STEP
$4.18B
$340K ﹤0.01%
8,226
-4,998
-38% -$247K
CHE icon
1364
Chemed
CHE
$6.62B
$340K ﹤0.01%
+730
New +$307K
EUFN icon
1365
iShares MSCI Europe Financials ETF
EUFN
$4.18B
$339K ﹤0.01%
8,705
+68
+0.8% +$2.57K
BF.B icon
1366
Brown-Forman Class B
BF.B
$12B
$339K ﹤0.01%
12,713
+1,915
+18% +$51.6K
MOG.A icon
1367
Moog Inc Class A
MOG.A
$11.2B
$338K ﹤0.01%
798
-1,640
-67% -$560K
BKLN icon
1368
Invesco Senior Loan ETF
BKLN
$6.78B
$338K ﹤0.01%
16,604
+22
+0.1% +$451
SNX icon
1369
TD Synnex
SNX
$21.2B
$338K ﹤0.01%
+1,265
New +$305K
ABCB icon
1370
Ameris Bancorp
ABCB
$5.69B
$338K ﹤0.01%
3,743
+973
+35% +$82.7K
M icon
1371
Macy's
M
$5.77B
$337K ﹤0.01%
14,330
-601
-4% -$12.6K
ACA icon
1372
Arcosa
ACA
$7.13B
$335K ﹤0.01%
2,306
+12
+0.5% +$1.49K
REAL icon
1373
The RealReal
REAL
$1.14B
$333K ﹤0.01%
+28,286
New +$301K
OGS icon
1374
ONE Gas
OGS
$4.84B
$333K ﹤0.01%
4,326
+855
+25% +$71.1K
EMN icon
1375
Eastman Chemical
EMN
$7.57B
$333K ﹤0.01%
4,978
-251
-5% -$18.4K
53 54
55
56 57

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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.