Latest Main Street Research LLC Stock Portfolio

Main Street Research LLC Performance:

2025 Q4: -0.06%YTD: 16.31%2024: 28.13%

Performance for 2025 Q4 is -0.06%, and YTD is 16.31%, and 2024 is 28.13%.

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

Main Street Research LLC is a hedge fund based in Sausalito, CA. On 2026-02-09, 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 Dec, 2025.

The top stock holdings of Main Street Research LLC are NVDA, GOOG, MSFT. The fund has invested 6.4% of it's portfolio in NVIDIA CORPORATION and 5.3% of portfolio in ALPHABET INC.

The fund managers got completely rid off MERCADOLIBRE INC (MELI), SPOTIFY TECHNOLOGY S A and ARISTA NETWORKS INC (ANET) stocks. They significantly reduced their stock positions in LINDE PLC (LIN), T-MOBILE US INC (TMUS) and TRANE TECHNOLOGIES PLC (TT). Main Street Research LLC opened new stock positions in SPDR SERIES TRUST (BIL), ISHARES INC (ACWV) and ASTRAZENECA PLC. The fund showed a lot of confidence in some stocks as they added substantially to CATERPILLAR INC (CAT), JOHNSON & JOHNSON (JNJ) and SALESFORCE INC (CRM).

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

Our best estimate is that Main Street Research LLC made a return of -0.06% in the last quarter. In trailing 12 months, it's portfolio return was 16.31%.

Performance
S&P 500

New Buys

Ticker	$ Bought
spdr series trust	43,958,900
ishares inc	34,557,900
astrazeneca plc	34,126,000
union pac corp	541,751
vanguard specialized funds	518,901
mitsubishi ufj finl group in	479,051
hut 8 corp	412,817
american express co	302,249

New stocks bought by Main Street Research LLC

Additions

Ticker	% Inc.
caterpillar inc	1,833
johnson & johnson	1,475
salesforce inc	152
aon plc	30.94
ishares tr	27.61
schwab strategic tr	16.6
thermo fisher scientific inc	15.56
texas instrs inc	14.77

Additions to existing portfolio by Main Street Research LLC

Reductions

Ticker	% Reduced
linde plc	-99.18
t-mobile us inc	-98.8
trane technologies plc	-98.8
netflix inc	-75.26
fair isaac corp	-71.11
palo alto networks inc	-61.58
vanguard index fds	-51.47
eli lilly & co	-47.07

Main Street Research LLC reduced stake in above stock

Sold off

Ticker	$ Sold
apollo global mgmt inc	-28,928,500
pacific biosciences calif in	-181,888
spotify technology s a	-35,194,600
arista networks inc	-5,082,950
mercadolibre inc	-37,000,800
tmc the metals company inc	-63,700
draftkings inc new	-243,100
fortinet inc	-352,295

Main Street Research LLC got rid off the above stocks

Sector Distribution

Main Street Research LLC has about 33% of it's holdings in Technology sector.

Sector	%
Technology	33
Others	29.7
Communication Services	9.1
Financial Services	8
Consumer Defensive	6.6
Healthcare	5.8
Consumer Cyclical	5.3
Industrials	2.3

Market Cap. Distribution

Main Street Research LLC has about 70.2% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
MEGA-CAP	49.4
UNALLOCATED	29.7
LARGE-CAP	20.8

Stocks belong to which Index?

About 60.2% of the stocks held by Main Street Research LLC either belong to S&P 500 or RUSSELL 2000 index.

Index	%
S&P 500	60.2
Others	39.7

Top 5 Winners (%)		%
MU	micron technology inc	66.8 %
AMD	advanced micro devices inc	32.0 %
LLY	eli lilly & co	31.3 %
GOOG	alphabet inc	28.6 %
GOOG	alphabet inc	28.4 %

Top 5 Winners ($)		$
GOOG	alphabet inc	20.9 M
	barclays plc	8.1 M
TSM	taiwan semiconductor mfg ltd	5.6 M
AAPL	apple inc	5.5 M
GLDM	world gold tr	4.1 M

Top 5 Losers (%)		%
NFLX	netflix inc	-57.5 %
HIMS	hims & hers health inc	-42.8 %
COIN	coinbase global inc	-33.0 %
ORCL	oracle corp	-27.5 %
	ishares bitcoin trust etf	-22.9 %

Top 5 Losers ($)		$
NFLX	netflix inc	-29.6 M
HOOD	robinhood mkts inc	-16.1 M
UBER	uber technologies inc	-7.3 M
META	meta platforms inc	-6.5 M
MSFT	microsoft corp	-5.8 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 129 stocks in it's portfolio. About 45.3% of the portfolio is in top 10 stocks. NFLX proved to be the most loss making stock for the portfolio. GOOG was the most profitable stock for Main Street Research LLC last quarter.

Last Reported on: 09 Feb, 2026

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
AAPL	apple inc	4.52	290,937	79,094,000	reduced	-17.19

ABBV	abbvie inc	0.12	9,355	2,137,490	reduced	-1.7

ABT	abbott labs	0.03	3,654	457,810	added	3.48

ACN	accenture plc ireland	0.03	2,059	552,430	reduced	-17.11

ACWF	ishares tr	4.53	1,907,800	79,135,500	added	27.61

ACWV	ishares inc	1.98	355,461	34,557,900	new

ACWV	ishares inc	0.16	15,138	2,812,190	reduced	-9.47

ADBE	adobe inc	0.01	771	269,842	reduced	-39.29

ADI	analog devices inc	0.02	1,248	338,458	added	3.14

ADP	automatic data processing in	0.03	2,309	597,886	reduced	-6.82

ADSK	autodesk inc	0.24	14,291	4,230,280	added	1.54

AMD	advanced micro devices inc	0.04	3,422	732,856	reduced	-2.2

AMZN	amazon com inc	3.43	259,849	59,978,300	reduced	-1.17

ANET	arista networks inc	0.00	0.00	0.00	sold off	-100

AOA	ishares tr	0.05	15,941	804,223	added	12.54

AON	aon plc	0.02	821	289,714	added	30.94

APH	amphenol corp new	2.29	295,357	39,988,000	reduced	-0.66

AVGO	broadcom inc	4.07	205,395	71,087,400	reduced	-1.45

AXP	american express co	0.02	817	302,249	new

BAC	bank america corp	0.04	11,118	611,490	reduced	-11.33