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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
+11.09%
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
$1.85B
AUM Growth
+$244M
Cap. Flow
+$111M
Cap. Flow %
6.02%
Top 10 Hldgs %
42.62%
Holding
135
New
20
Increased
70
Reduced
20
Closed
6

Top Buys

Rank Stock Value
1
ISCF icon
iShares International Small Cap Equity Factor ETF
ISCF
+$59.7M
2
MSFT icon
Microsoft
MSFT
+$37.5M
3
BCS icon
Barclays
BCS
+$33.6M
4
APH icon
Amphenol
APH
+$32.6M
5
APO icon
Apollo Global Management
APO
+$30.7M

Top Sells

Rank Stock Value
1
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$49.9M
2
PG icon
Procter & Gamble
PG
+$39.7M
3
BSX icon
Boston Scientific
BSX
+$38.8M
4
SAP icon
SAP
SAP
+$36.7M
5
ISRG icon
Intuitive Surgical
ISRG
+$32.3M

Sector Composition

Rank Sector Weight
1 Technology 35.78%
2 Financials 17.52%
3 Communication Services 14.82%
4 Consumer Discretionary 7.59%
5 Consumer Staples 6.49%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SYY icon
126
Sysco
SYY
$40.4B
$204K 0.01%
+2,475
New +$198K
DDOG icon
127
Datadog
DDOG
$81.6B
$202K 0.01%
+1,416
New +$195K
PACB icon
128
Pacific Biosciences
PACB
$363M
$182K 0.01%
+142,100
New +$192K
TMC icon
129
TMC The Metals Company
TMC
$1.78B
$63.7K ﹤0.01%
+10,000
New +$60K
BABA icon
130
Alibaba
BABA
$304B
– –
-226,019
Closed -$26.1M
CHKP icon
131
Check Point Software Technologies
CHKP
$12.8B
– –
-136,759
Closed -$30.3M
ISRG icon
132
Intuitive Surgical
ISRG
$132B
– –
-59,513
Closed -$32.3M
NOW icon
133
ServiceNow
NOW
$121B
– –
-1,080
Closed -$222K
RELX icon
134
RELX
RELX
$62.4B
– –
-7,666
Closed -$417K
SAP icon
135
SAP
SAP
$230B
– –
-120,723
Closed -$36.7M
2 3 4 5
6

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HJGA
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Main Street Research's Q3 2025 Portfolio in Review

As of Q3 2025, Main Street Research held 135 positions worth $1.85B, up 15% from $1.61B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Main Street Research deployed $111M of net new capital in Q3 2025, opening 20 new positions and adding to 70 existing holdings. Its largest new stake was iShares International Small Cap Equity Factor ETF: 1,495,000 shares worth $61.5M.

By sector, the portfolio is most concentrated in Technology at 36% of assets, up from 31% a quarter earlier, followed by Financials and Communication Services.

On the sell side, the largest reduction was Berkshire Hathaway Class B, an estimated $49.9M trimmed.

  • Main Street Research's largest Q3 2025 buy was iShares International Small Cap Equity Factor ETF: 1,495,000 shares worth $61.5M.
  • Main Street Research added most to Microsoft in Q3 2025, an estimated $37.5M increase.
  • Main Street Research's biggest Q3 2025 reduction was Berkshire Hathaway Class B, cutting an estimated $49.9M.
  • Main Street Research fully exited SAP in Q3 2025, selling an estimated $36.7M.
  • Main Street Research's ten largest holdings make up 43% of its $1.85B portfolio in Q3 2025.
  • Main Street Research opened 20 new positions and closed 6 in Q3 2025.
  • Main Street Research's portfolio value rose 15% quarter-over-quarter to $1.85B.

Based on Main Street Research's 13F filing for Q3 2025, filed 13 Nov 2025.