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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
D icon
676
Dominion Energy
D
$56B
$2.73M 0.01%
39,957
-5,449
-12% -$354K
KKR icon
677
KKR & Co
KKR
$87.2B
$2.72M 0.01%
29,637
+595
+2% +$57.7K
BBJP icon
678
JPMorgan BetaBuilders Japan ETF
BBJP
$19.6B
$2.72M 0.01%
36,081
-19,908
-36% -$1.47M
PRU icon
679
Prudential Financial
PRU
$40.3B
$2.71M 0.01%
25,119
+737
+3% +$74.9K
RAL
680
Ralliant Corp
RAL
$7.47B
$2.7M 0.01%
36,670
-3,803
-9% -$212K
AMPX icon
681
Amprius Technologies
AMPX
$1.32B
$2.7M 0.01%
194,712
+68,090
+54% +$1.22M
EBAY icon
682
eBay
EBAY
$48.7B
$2.69M 0.01%
24,098
+850
+4% +$90.7K
DFUV icon
683
Dimensional US Marketwide Value ETF
DFUV
$15.4B
$2.69M 0.01%
48,910
+133
+0.3% +$6.98K
NBIS
684
Nebius Group N.V.
NBIS
$56.9B
$2.68M 0.01%
+9,719
New +$1.92M
RH icon
685
RH
RH
$2.39B
$2.67M 0.01%
16,211
-188
-1% -$25.9K
LGND icon
686
Ligand Pharmaceuticals
LGND
$5.48B
$2.67M 0.01%
8,441
-13
-0.2% -$3.06K
CMCSA icon
687
Comcast
CMCSA
$84B
$2.66M 0.01%
108,223
-24,880
-19% -$642K
VSEC icon
688
VSE Corp
VSEC
$5.21B
$2.64M 0.01%
11,537
-399
-3% -$76.7K
VDE icon
689
Vanguard Energy ETF
VDE
$10.9B
$2.62M 0.01%
17,483
+4,508
+35% +$730K
EXC icon
690
Exelon
EXC
$43.8B
$2.62M 0.01%
56,292
+8,430
+18% +$390K
BIP icon
691
Brookfield Infrastructure Partners
BIP
$16.4B
$2.62M 0.01%
71,751
-10,083
-12% -$377K
PMAY icon
692
Innovator US Equity Power Buffer ETF May
PMAY
$806M
$2.61M 0.01%
63,147
+22,820
+57% +$932K
HPE icon
693
Hewlett Packard
HPE
$75.5B
$2.59M 0.01%
57,492
+4,573
+9% +$165K
IFRA icon
694
iShares US Infrastructure ETF
IFRA
$4.05B
$2.59M 0.01%
41,104
-18,220
-31% -$1.11M
ES icon
695
Eversource Energy
ES
$25.6B
$2.59M 0.01%
35,811
+10,731
+43% +$743K
NTLA icon
696
Intellia Therapeutics
NTLA
$1.61B
$2.58M 0.01%
152,612
+134,402
+738% +$1.88M
RYN icon
697
Rayonier
RYN
$5.97B
$2.58M 0.01%
121,290
-9,649
-7% -$202K
FDXF
698
FedEx Freight
FDXF
$18.2B
$2.57M 0.01%
+17,052
New +$2.79M
BXSL icon
699
Blackstone Secured Lending
BXSL
$5.8B
$2.56M 0.01%
107,984
+14,170
+15% +$338K
CBRE icon
700
CBRE Group
CBRE
$40.1B
$2.56M 0.01%
18,998
+327
+2% +$45.1K
26 27
28
29 30

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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.