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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
LIN icon
26
Linde
LIN
$223B
$34.8M 1.88%
73,368
+890
+1% +$421K
BKNG icon
27
Booking.com
BKNG
$149B
$33.3M 1.8%
153,975
+37,275
+32% +$8.32M
TT icon
28
Trane Technologies
TT
$104B
$33.2M 1.79%
78,610
+2,261
+3% +$966K
IBN icon
29
ICICI Bank
IBN
$109B
$31.8M 1.72%
1,051,914
+11,884
+1% +$388K
CCJ icon
30
Cameco
CCJ
$41.2B
$30.6M 1.65%
+364,392
New +$28.3M
GEV icon
31
GE Vernova
GEV
$271B
$29.9M 1.62%
48,641
+21,037
+76% +$12.7M
APO icon
32
Apollo Global Management
APO
$76.2B
$28.9M 1.56%
+217,067
New +$30.7M
PG icon
33
Procter & Gamble
PG
$344B
$23.5M 1.27%
152,748
-254,164
-62% -$39.7M
FICO icon
34
Fair Isaac
FICO
$22.7B
$12.9M 0.7%
8,627
-2,097
-20% -$3.15M
IBIT icon
35
iShares Bitcoin Trust
IBIT
$47.1B
$12.4M 0.67%
+190,842
New +$12.4M
PANW icon
36
Palo Alto Networks
PANW
$293B
$7.02M 0.38%
34,452
+21,306
+162% +$4.08M
BRK.B icon
37
Berkshire Hathaway Class B
BRK.B
$1.11T
$6.67M 0.36%
13,261
-102,920
-89% -$49.9M
TSLA icon
38
Tesla
TSLA
$1.29T
$5.79M 0.31%
13,020
+1,220
+10% +$423K
MCD icon
39
McDonald's
MCD
$190B
$5.76M 0.31%
18,968
-5
-0% -$1.52K
ANET icon
40
Arista Networks
ANET
$243B
$5.08M 0.27%
+34,884
New +$4.49M
GOOG icon
41
Alphabet (Google) Class C
GOOG
$4.6T
$4.79M 0.26%
19,661
-459
-2% -$96.5K
ADSK icon
42
Autodesk
ADSK
$49.7B
$4.47M 0.24%
14,074
-580
-4% -$177K
BRK.A icon
43
Berkshire Hathaway Class A
BRK.A
$1.11T
$3.77M 0.2%
5
– –
SCHW
44
Charles Schwab
SCHW
$185B
$3.26M 0.18%
34,098
+481
+1% +$45.7K
WFC icon
45
Wells Fargo
WFC
$268B
$3.11M 0.17%
37,085
+18,703
+102% +$1.52M
URTH icon
46
iShares MSCI World ETF
URTH
$8.23B
$3.04M 0.16%
16,721
-1,967
-11% -$344K
IXUS icon
47
iShares Core MSCI Total International Stock ETF
IXUS
$59.6B
$2.74M 0.15%
33,188
+7,703
+30% +$612K
XOM icon
48
ExxonMobil
XOM
$641B
$2.73M 0.15%
24,225
+2,241
+10% +$249K
CVX icon
49
Chevron
CVX
$381B
$2.61M 0.14%
16,801
+7,267
+76% +$1.13M
ABBV icon
50
AbbVie
ABBV
$429B
$2.2M 0.12%
9,517
+415
+5% +$84.5K
1
2
3 4 5

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BCM
Basswood Capital Management New York $2.12B AUM 19.53% 1-Year Est. Return
EF
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IVAV
Index Venture Associates VI St. Helier, Channel Islands, Jersey $2.11B AUM 13.76% 1-Year Est. Return
HJGA
Hardman Johnston Global Advisors Stamford, Connecticut $2.1B AUM 41.89% 1-Year Est. Return
CF
Centaurus Financial Anaheim, California $2.1B AUM 21.28% 1-Year Est. Return
BWC
Blue Whale Capital London, United Kingdom $2.1B AUM 97.03% 1-Year Est. Return
SFS
Strategic Financial Services Utica, New York $2.1B AUM 19.14% 1-Year Est. Return
AAP
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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.