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MSR

Main Street Research Portfolio holdings

AUM $2.12B
1-Year Est. Return 67.44%
This Fund
S&P 500
This Quarter Est. Return
+37.04%
1 Year Est. Return
+67.44%
3 Year Est. Return
+232.37%
5 Year Est. Return
+381.46%
10 Year Est. Return
+1,630.85%
AUM
$2.12B
AUM Growth
+$400M
Cap. Flow
-$6.17M
Cap. Flow %
-0.29%
Top 10 Hldgs %
48.91%
Holding
161
New
13
Increased
64
Reduced
53
Closed
21

Top Buys

Rank Stock Value
1
ROST icon
Ross Stores
ROST
+$33.9M
2
FTI icon
TechnipFMC
FTI
+$29.3M
3
BCS icon
Barclays
BCS
+$18.6M
4
ISCF icon
iShares International Small Cap Equity Factor ETF
ISCF
+$3.04M
5
TSM icon
TSMC
TSM
+$2.14M

Top Sells

Rank Stock Value
1
GLDM icon
SPDR Gold MiniShares Trust
GLDM
+$43.5M
2
MCK icon
McKesson
MCK
+$31.2M
3
PLTR icon
Palantir
PLTR
+$21.3M
4
IBIT icon
iShares Bitcoin Trust
IBIT
+$7.53M
5
PANW icon
Palo Alto Networks
PANW
+$2.44M

Sector Composition

Rank Sector Weight
1 Technology 42.89%
2 Financials 9.02%
3 Communication Services 7.71%
4 Industrials 6.2%
5 Healthcare 5.5%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SYK icon
101
Stryker
SYK
$133B
$384K 0.02%
1,221
-542
-31% -$171K
TJX icon
102
TJX Companies
TJX
$176B
$382K 0.02%
2,524
+605
+32% +$95.7K
SHOP icon
103
Shopify
SHOP
$159B
$382K 0.02%
3,345
+909
+37% +$104K
SJM icon
104
J.M. Smucker
SJM
$13.1B
$375K 0.02%
3,337
+479
+17% +$48.8K
EXPE icon
105
Expedia Group
EXPE
$35.2B
$366K 0.02%
1,431
+243
+20% +$57.7K
IWF icon
106
iShares Russell 1000 Growth ETF
IWF
$120B
$345K 0.02%
2,780
– –
MTCH icon
107
Match Group
MTCH
$9.17B
$333K 0.02%
8,746
+1,735
+25% +$61.5K
ENTG icon
108
Entegris
ENTG
$17.8B
$330K 0.02%
1,832
-20
-1% -$2.88K
COHR icon
109
Coherent
COHR
$48.7B
$325K 0.02%
823
-23
-3% -$8.14K
XYL icon
110
Xylem
XYL
$27.3B
$323K 0.02%
2,729
-590
-18% -$68.1K
UAL icon
111
United Airlines
UAL
$40.1B
$319K 0.02%
+2,344
New +$243K
IDXX icon
112
Idexx Laboratories
IDXX
$44.1B
$316K 0.01%
600
+153
+34% +$85.8K
BMY icon
113
Bristol-Myers Squibb
BMY
$132B
$303K 0.01%
5,252
-1,690
-24% -$97K
T icon
114
AT&T
T
$159B
$291K 0.01%
14,071
-6,122
-30% -$152K
VEA icon
115
Vanguard FTSE Developed Markets ETF
VEA
$230B
$291K 0.01%
+4,086
New +$285K
SCHX icon
116
Schwab US Large- Cap ETF
SCHX
$71.3B
$289K 0.01%
9,835
-800
-8% -$22.8K
MNST icon
117
Monster Beverage
MNST
$95.5B
$285K 0.01%
+2,967
New +$249K
PTC icon
118
PTC
PTC
$15.7B
$277K 0.01%
2,438
-43
-2% -$5.81K
CMCSA icon
119
Comcast
CMCSA
$84B
$271K 0.01%
11,037
-2,483
-18% -$64.1K
IUSG icon
120
iShares Core S&P US Growth ETF
IUSG
$31.3B
$270K 0.01%
+1,435
New +$259K
SCHF icon
121
Schwab International Equity ETF
SCHF
$67B
$266K 0.01%
9,606
-600
-6% -$16.2K
FNDX icon
122
Schwab Fundamental US Large Company Index ETF
FNDX
$26.7B
$266K 0.01%
8,541
– –
IYY icon
123
iShares Dow Jones US ETF
IYY
$2.93B
$264K 0.01%
1,446
– –
IUSV icon
124
iShares Core S&P US Value ETF
IUSV
$27.2B
$261K 0.01%
+2,371
New +$257K
PH icon
125
Parker-Hannifin
PH
$121B
$259K 0.01%
265
+4
+2% +$3.66K
3 4
5
6 7

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BCM
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EF
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IVAV
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HJGA
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CF
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BWC
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SFS
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Main Street Research's Q2 2026 Portfolio in Review

As of Q2 2026, Main Street Research held 161 positions worth $2.12B, up 23% from $1.72B the previous quarter. Its ten largest holdings account for 49% of the portfolio.

Main Street Research's Q2 2026 filing shows 13 new, 64 increased, 53 reduced and 21 closed positions. Its largest new stake was Ross Stores: 150,755 shares worth $32.1M. The largest sale was SPDR Gold MiniShares Trust, an estimated $43.5M.

By sector, the portfolio is most concentrated in Technology at 43% of assets, up from 38% a quarter earlier, followed by Financials and Communication Services.

  • Main Street Research's largest Q2 2026 buy was Ross Stores: 150,755 shares worth $32.1M.
  • Main Street Research added most to Barclays in Q2 2026, an estimated $18.6M increase.
  • Main Street Research's biggest Q2 2026 reduction was McKesson, cutting an estimated $31.2M.
  • Main Street Research fully exited SPDR Gold MiniShares Trust in Q2 2026, selling an estimated $43.5M.
  • Main Street Research's ten largest holdings make up 49% of its $2.12B portfolio in Q2 2026.
  • Main Street Research opened 13 new positions and closed 21 in Q2 2026.
  • Main Street Research's portfolio value rose 23% quarter-over-quarter to $2.12B.

Based on Main Street Research's 13F filing for Q2 2026, filed 29 Jul 2026.