Latest Main Street Research LLC Stock Portfolio

Main Street Research LLC Performance:

2026 Q1: -1.18%YTD: -1.18%2025: 17.74%

Performance for 2026 Q1 is -1.18%, and YTD is -1.18%, and 2025 is 17.74%.

About Main Street Research LLC and 13F Hedge Fund Stock Holdings

Main Street Research LLC is a hedge fund based in Sausalito, CA. On 2026-04-30, the fund reported it's updated stock portfolio. In the 13F Holdings report, Main Street Research LLC reported an equity portfolio of $1.7 Billions as of 31 Mar, 2026.

The top stock holdings of Main Street Research LLC are NVDA, AAPL, GOOG. The fund has invested 6.3% of it's portfolio in NVIDIA CORPORATION and 6% of portfolio in APPLE INC.

The fund managers got completely rid off ASTRAZENECA PLC (AZN), ICICI BANK LIMITED (IBN) and BOOKING HOLDINGS INC (BKNG) stocks. They significantly reduced their stock positions in ROBINHOOD MKTS INC (HOOD), UBER TECHNOLOGIES INC (UBER) and VISA INC (V). Main Street Research LLC opened new stock positions in CORNING INC (GLW), BHP BILLITON LIMITED (BHP) and ASTRAZENECA PLC. The fund showed a lot of confidence in some stocks as they added substantially to MICRON TECHNOLOGY INC (MU), FAIR ISAAC CORP (FICO) and SPDR GOLD TR (GLD).

Main Street Research LLC Annual Return Estimates Vs S&P 500

Our best estimate is that Main Street Research LLC made a return of -1.18% in the last quarter. In trailing 12 months, it's portfolio return was 19.34%.

Performance
S&P 500

New Buys

Ticker	$ Bought
corning inc	52,718,000
bhp billiton limited	37,767,500
astrazeneca plc	37,598,800
royal bk cda	36,007,100
keysight technologies inc	31,890,000
arista networks inc	4,294,970
disney walt co	1,034,180
pulte group inc	868,197

New stocks bought by Main Street Research LLC

Additions

Ticker	% Inc.
micron technology inc	1,949
fair isaac corp	239
spdr gold tr	162
vanguard index fds	159
palo alto networks inc	157
wells fargo & co	136
state str spdr dow jones ind	134
eli lilly & co	104

Additions to existing portfolio by Main Street Research LLC

Reductions

Ticker	% Reduced
robinhood mkts inc	-99.38
uber technologies inc	-97.43
visa inc	-94.11
netflix inc.	-74.83
palantir technologies inc	-61.92
microsoft corp	-59.85
bristol-myers squibb co	-52.52
t-mobile us inc	-50.51

Main Street Research LLC reduced stake in above stock

Sold off

Ticker	$ Sold
icici bank limited	-30,459,500
astrazeneca plc	-34,126,000
booking holdings inc	-20,387,700
hut 8 corp	-412,817
hims & hers health inc	-201,314
brookfield corp	-212,379
trimble inc	-294,753
ishares tr	-506,289

Main Street Research LLC got rid off the above stocks

Sector Distribution

Main Street Research LLC has about 36.5% of it's holdings in Others sector.

Sector	%
Others	36.5
Technology	30.2
Communication Services	8.1
Healthcare	6.6
Consumer Defensive	6.6
Financial Services	4.7
Consumer Cyclical	4
Industrials	2.9

Market Cap. Distribution

Main Street Research LLC has about 63.4% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
MEGA-CAP	50
UNALLOCATED	36.5
LARGE-CAP	13.4

Stocks belong to which Index?

About 61.9% of the stocks held by Main Street Research LLC either belong to S&P 500 or RUSSELL 2000 index.

Index	%
S&P 500	61.9
Others	38.1

Top 5 Winners (%)		%
XOM	exxon mobil corp	40.1 %
	ge vernova inc	32.9 %
ACWV	ishares inc	26.2 %
CVX	chevron corporation	25.9 %
CAT	caterpillar inc	23.3 %

Top 5 Winners ($)		$
	ge vernova inc	11.0 M
ASML	asml hldg nv	10.3 M
ACWV	ishares inc	9.3 M
CAT	caterpillar inc	8.2 M
TSM	taiwan semiconductor manufac	7.3 M

Top 5 Losers (%)		%
BSX	boston scientific corp	-34.1 %
INTU	intuit	-33.2 %
CRM	salesforce inc	-28.8 %
ADBE	adobe inc	-28.0 %
FICO	fair isaac corp	-27.4 %

Top 5 Losers ($)		$
MSFT	microsoft corp	-13.4 M
HOOD	robinhood mkts inc	-11.7 M
PLTR	palantir technologies inc	-9.6 M
GOOG	alphabet inc	-7.8 M
AVGO	broadcom inc	-7.6 M

Main Street Research LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of Main Street Research LLC

Main Street Research LLC has 148 stocks in it's portfolio. About 45.2% of the portfolio is in top 10 stocks. MSFT proved to be the most loss making stock for the portfolio. was the most profitable stock for Main Street Research LLC last quarter.

Last Reported on: 30 Apr, 2026

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
AAPL	apple inc	5.96	403,578	102,424,000	added	38.72

ABBV	abbvie inc	0.13	10,258	2,231,040	added	9.65

ABT	abbott laboratories	0.02	3,859	396,237	added	5.61

ACN	accenture plc ireland	0.02	1,683	333,722	reduced	-18.26

ACWF	ishares tr	4.76	1,958,630	81,851,000	added	2.66

ACWV	ishares inc	2.59	361,874	44,514,100	added	1.8

ACWV	ishares inc	0.15	14,742	2,653,860	reduced	-2.62

ADBE	adobe inc	0.01	1,005	244,295	added	30.35

ADI	analog devices inc	0.03	1,491	474,347	added	19.47

ADP	automatic data processing in	0.03	2,232	453,498	reduced	-3.33

ADSK	autodesk inc	0.20	14,403	3,448,080	added	0.78

AMD	advanced micro devices inc	0.04	3,145	639,787	reduced	-8.09

AMZN	amazon com inc	3.26	269,193	56,064,800	added	3.6

ANET	arista networks inc	0.25	34,981	4,294,970	new

AOA	ishares tr	0.05	18,751	930,612	added	17.63

AON	aon plc	0.01	622	200,769	reduced	-24.24

APH	amphenol corp	2.21	301,043	38,036,800	added	1.93

ASML	asml hldg nv	3.20	41,687	55,061,400	added	3.91

AVGO	broadcom inc	3.83	212,402	65,740,500	added	3.41

AXP	american express co	0.01	773	233,817	reduced	-5.39