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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
OPEN icon
1501
Opendoor
OPEN
$2.71B
$240K ﹤0.01%
52,010
+87
+0.2% +$416
DOC icon
1502
Healthpeak Properties
DOC
$14B
$239K ﹤0.01%
11,173
+32
+0.3% +$597
NRGV icon
1503
Energy Vault
NRGV
$784M
$239K ﹤0.01%
50,762
+62
+0.1% +$277
AES icon
1504
AES
AES
$10.6B
$239K ﹤0.01%
+16,299
New +$237K
TSN icon
1505
Tyson Foods
TSN
$18.6B
$239K ﹤0.01%
4,169
+433
+12% +$27.1K
FIGS icon
1506
FIGS
FIGS
$2.32B
$239K ﹤0.01%
+23,316
New +$307K
G icon
1507
Genpact
G
$5.9B
$238K ﹤0.01%
8,671
+682
+9% +$22.4K
RPRX icon
1508
Royalty Pharma
RPRX
$26.3B
$238K ﹤0.01%
4,252
-1,614
-28% -$84K
GSHD icon
1509
Goosehead Insurance
GSHD
$1.36B
$238K ﹤0.01%
4,911
-548
-10% -$22.6K
REPX icon
1510
Riley Exploration Permian
REPX
$964M
$238K ﹤0.01%
+7,224
New +$258K
FYC icon
1511
First Trust Small Cap Growth AlphaDEX Fund
FYC
$1.4B
$237K ﹤0.01%
1,861
+1,161
+166% +$131K
MKTX icon
1512
MarketAxess Holdings
MKTX
$5.74B
$237K ﹤0.01%
+2,085
New +$297K
BEN icon
1513
Franklin Templeton
BEN
$17B
$236K ﹤0.01%
+7,098
New +$213K
DON icon
1514
WisdomTree US MidCap Dividend Fund
DON
$3.95B
$235K ﹤0.01%
4,150
-763
-16% -$42K
UGI icon
1515
UGI
UGI
$8.09B
$233K ﹤0.01%
+6,753
New +$239K
INDA icon
1516
iShares MSCI India ETF
INDA
$6.57B
$233K ﹤0.01%
4,719
+162
+4% +$7.9K
XVV icon
1517
iShares ESG Screened S&P 500 ETF
XVV
$676M
$231K ﹤0.01%
4,073
– –
KOS icon
1518
Kosmos Energy
KOS
$1.74B
$231K ﹤0.01%
109,544
+9,475
+9% +$26.4K
HOMB icon
1519
Home BancShares
HOMB
$6B
$231K ﹤0.01%
+8,088
New +$220K
MSM icon
1520
MSC Industrial Direct
MSM
$6.66B
$230K ﹤0.01%
+1,930
New +$205K
CSL icon
1521
Carlisle Companies
CSL
$13.3B
$229K ﹤0.01%
632
+23
+4% +$8.06K
SPTM icon
1522
State Street SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$14B
$228K ﹤0.01%
2,516
+6
+0.2% +$528
WLDN icon
1523
Willdan Group
WLDN
$1.25B
$228K ﹤0.01%
2,883
-1,667
-37% -$142K
AFG icon
1524
American Financial Group
AFG
$11.8B
$228K ﹤0.01%
+1,626
New +$216K
RSPT icon
1525
Invesco S&P 500 Equal Weight Technology ETF
RSPT
$5.83B
$227K ﹤0.01%
3,526
-31,355
-90% -$1.8M
59 60
61
62 63

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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.