Main Street Research LLC Holdings Report (13F Filings)

CIK: 0001513211

Diversified strategyMomentum followerQuality / disciplined sizing

Total reported value

$1.7B

Reporting period: 2026-03-31 · Number of holdings: 148

Main Street Research LLC disclosed 148 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $1.7B and a quarterly turnover rate of 48.3%.

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Personality snowflake

Concentration: 13.08
Portfolio Stability: 48.26
Momentum/Contrarian: 100
Sector conviction: 71.62
Diversification: 100
Sizing Uniformity: 80.34

Main Street Research LLC's disclosed holdings carry a Herfindahl concentration index of 0.033 — mathematically equivalent to about 31 equally-sized positions, well below its 148 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.

Position sizes vary widely across the portfolio (a coefficient of variation of 1.97), with a handful of outsized bets alongside many smaller positions.

No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.

Sector classification currently covers about 62% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.

Recent moves

Trim HOOD
-99.4%　-$60.0M
Trim V
-94.1%　-$58.0M
Trim MSFT
-59.8%　-$56.3M
Trim PLTR
-61.9%　-$53.7M
Add MU
+1949.8%　$35.3M
Trim UBER
-97.4%　-$35.7M

Holdings Map

New buyAddUnchangedTrim

Top 10 holdings by weight

Full holdings list this quarter

#	Ticker	Issuer	Asset Subclass	Weight	Weight Change	Shares Change
1	NVDA	Nvidia CORP	Stock-Tech	6.30%	-0.06%	+4.18%
2	AAPL	Apple INC	Stock-Tech	5.96%	+1.44%	+38.72%
3	GOOGL	Alphabet Inc-cl A	Stock-Comm Services	5.22%	-0.11%	+4.79%
4	ISCF	Ishares International Small	ETF-Other	4.76%	+0.23%	+2.66%
5	TSM	Taiwan Semiconductor-sp Adr	Stock-Tech	4.39%	+0.59%	+2.30%
6	XBI	Ss Spdr S&p Biotech ETF	ETF-Tech	4.22%	+1.71%	+57.40%
7	JPM	Jpmorgan Chase & Co	Stock-Financials	3.83%	-0.26%	+0.83%
8	AVGO	Broadcom INC	Stock-Tech	3.83%	-0.24%	+3.41%
9	MCK	Mckesson CORP	Stock-Healthcare	3.41%	+0.25%	+0.61%
10	AMZN	Amazon.com INC	Stock-Consumer Disc	3.26%	-0.17%	+3.60%
11	ASML	ASML Holding N.V.	Stock-Tech	3.20%	+0.74%	+3.91%
12	GLW	Corning INC	Stock-Tech	3.07%	+3.07%	NEW
13	COST	Costco Wholesale CORP	Stock-Consumer Staples	2.68%	-0.40%	-26.02%
14	JNJ	Johnson & Johnson	Stock-Healthcare	2.66%	+0.54%	+4.22%
15	EWY	Ishares Msci South Korea ETF	ETF-Other	2.59%	+0.61%	+1.80%
16	GEV	GE Vernova INC	Stock-Industrials	2.57%	+0.73%	+3.11%
17	GLDM	Spdr Gold Minishares Trust	ETF-Commodities	2.53%	+0.27%	+1.54%
18	CAT	Caterpillar INC	Stock-Industrials	2.52%	+0.57%	+2.60%
19	WMT	Walmart INC	Stock-Consumer Staples	2.49%	+0.33%	+1.91%
20	CCJ	Cameco CORP	Stock-Energy	2.46%	+0.46%	+1.89%
21	META	Meta Platforms Inc-class A	Stock-Comm Services	2.36%	-0.91%	-18.01%
22	APH	Amphenol Corp-cl A	Stock-Tech	2.21%	-0.08%	+1.93%
23	BHP	Bhp Group Ltd-spon Adr	Stock-Materials	2.20%	+2.20%	NEW
24	AZN	AstraZeneca PLC	Stock-Healthcare	2.19%	+2.19%	NEW
25	MU	Micron Technology INC	Stock-Tech	2.14%	+2.05%	+1949.77%
26	RY	Royal Bank Of Canada	Stock-Financials	2.10%	+2.10%	NEW
27	KEYS	Keysight Technologies In	Stock-Tech	1.86%	+1.86%	NEW
28	MSFT	Microsoft CORP	Stock-Tech	1.45%	-3.20%	-59.85%
29	PLTR	Palantir Technologies Inc-a	Stock-Tech	1.43%	-3.05%	-61.92%
30	PG	Procter & Gamble Co/the	Stock-Consumer Staples	1.27%	—	+0.36%
31	BCS	Barclays Plc-spons Adr	Stock-Financials	1.05%	-1.40%	-49.43%
32	FICO	Fair Isaac CORP	Stock-Tech	0.53%	+0.29%	+239.65%
33	IBIT	Ishares Bitcoin Trust ETF	ETF-Crypto	0.44%	-0.07%	+9.22%
34	GOOG	Alphabet Inc-cl C	Stock-Comm Services	0.39%	—	+16.65%
35	BRK-B	Berkshire Hathaway Inc-cl B	Stock-Other	0.33%	—	-1.14%
36	PANW	Palo Alto Networks INC	Stock-Tech	0.32%	+0.18%	+157.08%
37	MCD	Mcdonald's CORP	Stock-Consumer Disc	0.28%	-0.04%	-16.70%
38	TSLA	Tesla INC	Stock-Consumer Disc	0.27%	-0.06%	-3.22%
39	SCHW	Schwab (charles) CORP	Stock-Financials	0.25%	+0.07%	+45.87%
40	ANET	Arista Networks INC	Stock-Tech	0.25%	+0.25%	NEW
41	XOM	Exxon Mobil CORP	Stock-Energy	0.24%	+0.08%	+3.08%
42	WFC	Wells Fargo & Co	Stock-Financials	0.22%	+0.11%	+136.23%
43	BRK-A	Berkshire Hathaway Inc-cl A	Stock-Other	0.21%	—	—
44	CVX	Chevron CORP	Stock-Energy	0.20%	+0.12%	+77.01%
45	ADSK	Autodesk INC	Stock-Tech	0.20%	—	+0.78%
46	IXUS	Ishares Core Intl Stock ETF	ETF-Other	0.19%	—	+22.20%
47	V	Visa Inc-class A Shares	Stock-Financials	0.18%	-3.31%	-94.11%
48	LLY	Eli Lilly & Co	Stock-Healthcare	0.16%	+0.07%	+104.93%
49	URTH	Ishares Msci World ETF	ETF-Other	0.15%	—	-2.62%
50	ABBV	Abbvie INC	Stock-Healthcare	0.13%	—	+9.65%

1–50 of 148

Portfolio Performance

Performance for Q3 2026

+0.1%

Performance Last 4 Quarters

+12.9%

Based on 80% of reported portfolio value with available pricing

Stdev: +14.6%
Beta: +1.05
Alpha: 0%
Max Drawdown: -8.3%
Annualized Perf: +19.9%
Batting Avg vs S&P: +58.3%
Sortino: +2.7
Stutzer: +0.39
Treynor: +0.18
Sterling: +1.17
Calmar: +2.38
Information Ratio: +0.16
Tracking Error: +5.1%
Stdev Down: +7.1%
Winning Months %: +61.1%
Losing Months %: +38.9%
Best 12 Months: +35.6%
Worst 12 Months: +6.3%
Efficiency Ratio: +0.56
Sharpe: +1.32
Stdev Sectors: +11.9%
Skewness: +0.23
Kurtosis: +0.38
Upside Potential: +4.35

Reported value over time

Sector allocation

Sector allocation over time

Quarterly history

Period	Holdings	Total value	Stability	Top holdings
2026-03-31	148	$1.7B	48	1NVDA 2AAPL 3GOOGL Top holdings2026-03-31 1.NVDA 2.AAPL 3.GOOGL 4.ISCF 5.TSM 6.XBI 7.JPM 8.AVGO 9.MCK 10.AMZN
2025-12-31	129	$1.7B	35	1NVDA 2GOOGL 3MSFT Top holdings2025-12-31 1.NVDA 2.GOOGL 3.MSFT 4.ISCF 5.AAPL 6.PLTR 7.JPM 8.AVGO 9.TSM 10.V
2025-09-30	129	$1.9B	74	1NVDA 2AAPL 3MSFT Top holdings2025-09-30 1.NVDA 2.AAPL 3.MSFT 4.PLTR 5.HOOD 6.GOOGL 7.JPM 8.AVGO 9.META 10.TSM
2025-06-30	115	$1.6B	0	1NVDA 2JPM 3PG Top holdings2025-06-30 1.NVDA 2.JPM 3.PG 4.PLTR 5.COST 6.V 7.AAPL 8.NFLX 9.BRK-B 10.GOOGL
2025-03-31	101	$1.5B	100	1AAPL 2PLTR 3PG Top holdings2025-03-31 1.AAPL 2.PLTR 3.PG 4.V 5.AMZN 6.META 7.BRK-B 8.COST 9.JPM 10.MSFT
2024-12-31	110	$1.6B	0	1AAPL 2NVDA 3PLTR Top holdings2024-12-31 1.AAPL 2.NVDA 3.PLTR 4.AMZN 5.PG 6.IWM 7.AVGO 8.META 9.COST 10.MSFT
2024-09-30	109	$1.6B	0	1NVDA 2AAPL 3PG Top holdings2024-09-30 1.NVDA 2.AAPL 3.PG 4.IWM 5.AMZN 6.META 7.NVO 8.MSFT 9.COST 10.BRK-B
2024-06-30	103	$1.5B	0	1NVDA 2AAPL 3NVO Top holdings2024-06-30 1.NVDA 2.AAPL 3.NVO 4.PG 5.MCK 6.AMZN 7.MSFT 8.GOOGL 9.COST 10.META
2024-03-31	107	$1.5B	0	1NVDA 2IWM 3NVO Top holdings2024-03-31 1.NVDA 2.IWM 3.NVO 4.AAPL 5.PG 6.MCK 7.AMZN 8.MSFT 9.META 10.BRK-B
2023-12-31	106	$1.2B	0	1AAPL 2IWM 3PG Top holdings2023-12-31 1.AAPL 2.IWM 3.PG 4.NVO 5.MCK 6.MSFT 7.AMZN 8.V 9.NVDA 10.GOOGL
2023-09-30	91	$970.6M	0	1AAPL 2PG 3MCK Top holdings2023-09-30 1.AAPL 2.PG 3.MCK 4.NVO 5.MSFT 6.GOOGL 7.IWM 8.V 9.KO 10.CAT
2023-06-30	93	$627.4M	0	1AAPL 2PG 3MCK Top holdings2023-06-30 1.AAPL 2.PG 3.MCK 4.NVO 5.V 6.ELV 7.KO 8.UL 9.TMUS 10.GD
2023-03-31	91	$506.4M	0	1AAPL 2PG 3NVO Top holdings2023-03-31 1.AAPL 2.PG 3.NVO 4.MCK 5.V 6.ELV 7.KO 8.TMUS 9.GD 10.MSFT
2022-12-31	98	$410.7M	0	1PG 2MCK 3AAPL Top holdings2022-12-31 1.PG 2.MCK 3.AAPL 4.NVO 5.ELV 6.KO 7.V 8.GD 9.TMUS 10.AEP
2022-09-30	97	$454.0M	0	1UUP 2AAPL 3TBT Top holdings2022-09-30 1.UUP 2.AAPL 3.TBT 4.MCK 5.SH1USD 6.PG 7.ELV 8.NVO 9.KO 10.V
2022-06-30	86	$381.4M	0	1PG 2AAPL 3MCK Top holdings2022-06-30 1.PG 2.AAPL 3.MCK 4.TBT 5.ELV 6.NVO 7.KO 8.EOG 9.V 10.GD
2022-03-31	116	$1.1B	0	1AAPL 2PG 3COST Top holdings2022-03-31 1.AAPL 2.PG 3.COST 4.AMZN 5.NUE 6.GOOGL 7.CVX 8.MSFT 9.NVDA 10.MCK
2021-12-31	141	$1.3B	0	1AAPL 2PG 3NVDA Top holdings2021-12-31 1.AAPL 2.PG 3.NVDA 4.MSFT 5.IWM 6.ASML 7.NUE 8.AMZN 9.COST 10.ADBE
2021-09-30	137	$1.1B	0	1AAPL 2PG 3IWM Top holdings2021-09-30 1.AAPL 2.PG 3.IWM 4.AMZN 5.ASML 6.MSFT 7.ADBE 8.NUE 9.NVDA 10.DHR
2021-06-30	143	$1.2B	92	1AAPL 2PG 3IWM Top holdings2021-06-30 1.AAPL 2.PG 3.IWM 4.AMZN 5.00724f 6.MSFT 7.NUE 8.ASML 9.67066g 10.SWKS
2021-03-31	127	$1.1B	33	1PG 2AAPL 3IWM Top holdings2021-03-31 1.PG 2.AAPL 3.IWM 4.AMZN 5.ASML 6.CAT 7.00724f 8.NUE 9.MSFT 10.JD
2020-12-31	126	$929.8M	41	1PG 2AAPL 3AMZN Top holdings2020-12-31 1.PG 2.AAPL 3.AMZN 4.00724f 5.JD 6.IWM 7.MSFT 8.COST 9.ASML 10.DHR
2020-09-30	109	$785.3M	84	1PG 2AAPL 3AMZN Top holdings2020-09-30 1.PG 2.AAPL 3.AMZN 4.00724f 5.JD 6.MSFT 7.COST 8.DHR 9.67066g 10.SWKS
2020-06-30	97	$637.2M	63	1PG 2AAPL 3AMZN Top holdings2020-06-30 1.PG 2.AAPL 3.AMZN 4.ADBE 5.MSFT 6.JD 7.COST 8.NTES 9.DHR 10.DG
2020-03-31	78	$408.2M	97	1PG 2AAPL 3ADBE Top holdings2020-03-31 1.PG 2.AAPL 3.ADBE 4.AMZN 5.BIIB 6.COST 7.MSFT 8.GILD 9.VZ 10.NTES
2019-12-31	106	$634.2M	33	1PG 2EEM 3NEE Top holdings2019-12-31 1.PG 2.EEM 3.NEE 4.ASML 5.AAPL 6.ADBE 7.TGT 8.GOOGL 9.BABA 10.BIIB
2019-09-30	94	$533.1M	100	1PG 2NEE 3ASML Top holdings2019-09-30 1.PG 2.NEE 3.ASML 4.GOOGL 5.HD 6.ADBE 7.COST 8.TGT 9.VZ 10.AMZN
2019-06-30	91	$444.5M	90	1PG265339f3BHP Top holdings2019-06-30 1.PG 2.65339f 3.BHP 4.00724f 5.ASML 6.JNJ 7.02079k 8.UL 9.BSX 10.17275r
2019-03-31	90	$314.6M	24	1PG 2NEE 3BHP Top holdings2019-03-31 1.PG 2.NEE 3.BHP 4.ADBE 5.LW 6.DE 7.ASML 8.VZ 9.UL 10.AMZN
2018-12-31	76	$257.2M	100	1PG 2LW 3NEE Top holdings2018-12-31 1.PG 2.LW 3.NEE 4.BHP 5.DE 6.VZ 7.UL 8.AMZN 9.AAPL 10.SUI
2018-09-30	108	$696.5M	31	1IWM 2AMZN 3AAPL Top holdings2018-09-30 1.IWM 2.AMZN 3.AAPL 4.NFLX 5.UNH 6.67066g 7.79466l 8.46625h 9.92826c 10.02079k
2018-06-30	115	$638.7M	29	1IWM 2AMZN 3NFLX Top holdings2018-06-30 1.IWM 2.AMZN 3.NFLX 4.AAPL 5.UNH 6.46625h 7.79466l 8.RF 9.67066g 10.LW
2018-03-31	113	$631.9M	27	1IWM 2AMZN 3AAPL Top holdings2018-03-31 1.IWM 2.AMZN 3.AAPL 4.UNH 5.46625h 6.RF 7.CAT 8.NFLX 9.67066g 10.PG
2017-12-31	107	$657.0M	12	1IWM 2PG330303m Top holdings2017-12-31 1.IWM 2.PG 3.30303m 4.AAPL 5.UNH 6.CAT 7.LRCXEUR 8.46625h 9.AMZN 10.RF
2017-09-30	115	$619.7M	17	1IWM 2PG330303m Top holdings2017-09-30 1.IWM 2.PG 3.30303m 4.LRCXEUR 5.AAPL 6.UNH 7.46625h 8.CAT 9.JNJ 10.RF
2017-06-30	123	$612.2M	23	1IWM 2PG330303m Top holdings2017-06-30 1.IWM 2.PG 3.30303m 4.AAPL 5.UNH 6.JNJ 7.46625h 8.BCRUSD 9.LRCXEUR 10.RF
2017-03-31	115	$571.0M	26	1IWM 2PG330303m Top holdings2017-03-31 1.IWM 2.PG 3.30303m 4.AAPL 5.UNH 6.JNJ 7.46625h 8.RF 9.LRCXEUR 10.SUI
2016-12-31	108	$513.5M	50	1PG230303m3T Top holdings2016-12-31 1.PG 2.30303m 3.T 4.UNH 5.RF 6.46625h 7.JNJ 8.FITB 9.CVX 10.SUI
2016-09-30	107	$511.6M	27	1PG230303m3T Top holdings2016-09-30 1.PG 2.30303m 3.T 4.JNJ 5.CCI 6.SUI 7.UNH 8.AMGN 9.EIX 10.25746u
2016-06-30	105	$483.9M	24	1PG 2T330303m Top holdings2016-06-30 1.PG 2.T 3.30303m 4.CCI 5.BMY 6.JNJ 7.EIX 8.SUI 9.25746u 10.PSA
2016-03-31	94	$387.8M	33	1PG230303m3T Top holdings2016-03-31 1.PG 2.30303m 3.T 4.JNJ 5.25746u 6.EIX 7.BMY 8.CLX 9.UNH 10.AMGN
2015-12-31	117	$468.0M	21	1PG230303m3SCHW Top holdings2015-12-31 1.PG 2.30303m 3.SCHW 4.79466l 5.BMY 6.g0177j 7.AMGN 8.JNJ 9.T 10.CLX
2015-09-30	117	$426.3M	61	1PG230303m3g0177j Top holdings2015-09-30 1.PG 2.30303m 3.g0177j 4.SCHW 5.JNJ 6.AMGN 7.BMY 8.GD 9.79466l 10.25746u
2015-06-30	135	$488.3M	23	1PG 2AAPL 3BMRN Top holdings2015-06-30 1.PG 2.AAPL 3.BMRN 4.HD 5.g0177j 6.BMY 7.30303m 8.00971t 9.ASML 10.AMGN
2015-03-31	135	$465.0M	15	1PG 2AAPL 3HD Top holdings2015-03-31 1.PG 2.AAPL 3.HD 4.g0083b 5.BMRN 6.AMGN 7.00971t 8.BMY 9.30303m 10.ASML
2014-12-31	134	$467.0M	41	1PG2g0083b3AAPL Top holdings2014-12-31 1.PG 2.g0083b 3.AAPL 4.HD 5.AEP 6.AMGN 7.ASML 8.30303m 9.FDX 10.WELL
2014-09-30	134	$449.1M	19	1g0083b2PG 3AAPL Top holdings2014-09-30 1.g0083b 2.PG 3.AAPL 4.WEP 5.GILD 6.HD 7.CVX 8.DHR 9.XOM 10.AEP
2014-06-30	137	$424.1M	13	1g0083b2PG 3CVX Top holdings2014-06-30 1.g0083b 2.PG 3.CVX 4.WEP 5.AAPL 6.XOM 7.DHR 8.AEP 9.HD 10.89151e
2014-03-31	137	$411.7M	16	1g0083b2PG 3CVX Top holdings2014-03-31 1.g0083b 2.PG 3.CVX 4.XOM 5.WEP 6.DHR 7.HD 8.25746u 9.AEP 10.BMY
2013-12-31	145	$400.5M	13	1PG2g0083b3CVX Top holdings2013-12-31 1.PG 2.g0083b 3.CVX 4.XOM 5.DHR 6.HD 7.WEP 8.BMY 9.740189 10.AAPL
2013-09-30	137	$370.2M	27	1PG2g0083b3CVX Top holdings2013-09-30 1.PG 2.g0083b 3.CVX 4.XOM 5.ASML 6.DHR 7.966837 8.HD 9.WEP 10.BMY
2013-06-30	139	$331.1M	0	1PG200507k3CVX Top holdings2013-06-30 1.PG 2.00507k 3.CVX 4.HD 5.DHR 6.WEP 7.AEP 8.740189 9.BMY 10.92343v

Holding changes this quarter

Main Street Research LLC's most significant position changes for 2026-03-31: New buy: Corning INC (GLW); New buy: Bhp Group Ltd-spon Adr (BHP); New buy: AstraZeneca PLC (AZN); New buy: Royal Bank Of Canada (RY); Sold out: Astrazeneca Plc-spons Adr (AZNN).

Position changes disclosed by Main Street Research LLC for the quarter ending 2026-03-31, including ticker, issuer, weight change, shares change, and action
#	Ticker	Issuer	Weight Change	Shares Change	Action
1	MU	Micron Technology INC	+2.1%	+1949.77%	Add
2	XBI	Ss Spdr S&p Biotech ETF	+1.7%	+57.40%	Add
3	AAPL	Apple INC	+1.4%	+38.72%	Add
4	ASML	ASML Holding N.V.	+0.7%	+3.91%	Add
5	GEV	GE Vernova INC	+0.7%	+3.11%	Add
6	EWY	Ishares Msci South Korea ETF	+0.6%	+1.80%	Add
7	TSM	Taiwan Semiconductor-sp Adr	+0.6%	+2.30%	Add
8	CAT	Caterpillar INC	+0.6%	+2.60%	Add
9	JNJ	Johnson & Johnson	+0.5%	+4.22%	Add
10	CCJ	Cameco CORP	+0.5%	+1.89%	Add
11	WMT	Walmart INC	+0.3%	+1.91%	Add
12	FICO	Fair Isaac CORP	+0.3%	+239.65%	Add
13	GLDM	Spdr Gold Minishares Trust	+0.3%	+1.54%	Add
14	MCK	Mckesson CORP	+0.3%	+0.61%	Add
15	ISCF	Ishares International Small	+0.2%	+2.66%	Add
16	PANW	Palo Alto Networks INC	+0.2%	+157.08%	Add
17	CVX	Chevron CORP	+0.1%	+77.01%	Add
18	WFC	Wells Fargo & Co	+0.1%	+136.23%	Add
19	XOM	Exxon Mobil CORP	+0.1%	+3.08%	Add
20	SCHW	Schwab (charles) CORP	+0.1%	+45.87%	Add
21	LLY	Eli Lilly & Co	+0.1%	+104.93%	Add
22	MCD	Mcdonald's CORP	0%	-16.70%	Trim
23	NVDA	Nvidia CORP	-0.1%	+4.18%	Add
24	TSLA	Tesla INC	-0.1%	-3.22%	Trim
25	IBIT	Ishares Bitcoin Trust ETF	-0.1%	+9.22%	Add
26	APH	Amphenol Corp-cl A	-0.1%	+1.93%	Add
27	GOOGL	Alphabet Inc-cl A	-0.1%	+4.79%	Add
28	AMZN	Amazon.com INC	-0.2%	+3.60%	Add
29	AVGO	Broadcom INC	-0.2%	+3.41%	Add
30	JPM	Jpmorgan Chase & Co	-0.3%	+0.83%	Add
31	COST	Costco Wholesale CORP	-0.4%	-26.02%	Trim
32	META	Meta Platforms Inc-class A	-0.9%	-18.01%	Trim
33	BCS	Barclays Plc-spons Adr	-1.4%	-49.43%	Trim
34	UBER	Uber Technologies INC	-2%	-97.43%	Trim
35	PLTR	Palantir Technologies Inc-a	-3.1%	-61.92%	Trim
36	MSFT	Microsoft CORP	-3.2%	-59.85%	Trim
37	V	Visa Inc-class A Shares	-3.3%	-94.11%	Trim
38	HOOD	Robinhood Markets INC - A	-3.4%	-99.38%	Trim
39	GLW	Corning INC	—	NEW	New buy
40	BHP	Bhp Group Ltd-spon Adr	—	NEW	New buy
41	AZN	AstraZeneca PLC	—	NEW	New buy
42	RY	Royal Bank Of Canada	—	NEW	New buy
43	AZNN	Astrazeneca Plc-spons Adr	—	EXIT	Sold out
44	KEYS	Keysight Technologies In	—	NEW	New buy
45	IBN	Icici Bank Ltd-spon Adr	—	EXIT	Sold out
46	BKNG	Booking Holdings INC	—	EXIT	Sold out
47	ANET	Arista Networks INC	—	NEW	New buy
48	DIS	Walt Disney Co/the	—	NEW	New buy
49	PHM	Pultegroup INC	—	NEW	New buy
50	CRUS	Cirrus Logic INC	—	NEW	New buy

Filing History

Period	Filed	Type	EDGAR
2026-03-31	2026-04-30	13F-HR	View on EDGAR
2025-12-31	2026-02-09	13F-HR	View on EDGAR
2025-09-30	2025-11-13	13F-HR	View on EDGAR
2025-06-30	2025-08-05	13F-HR	View on EDGAR
2025-03-31	2025-04-30	13F-HR	View on EDGAR
2024-12-31	2025-02-07	13F-HR	View on EDGAR
2024-09-30	2024-11-12	13F-HR	View on EDGAR
2024-06-30	2024-07-29	13F-HR	View on EDGAR
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2022-12-31	2023-02-06	13F-HR	View on EDGAR
2022-09-30	2022-11-14	13F-HR	View on EDGAR
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FAQ

What is Main Street Research LLC and what type of investor is it?

Main Street Research LLC is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-03-31), the firm manages a tracked equity portfolio valued at approximately $1.7B, spread across 148 disclosed positions.

What are Main Street Research LLC's largest equity positions?

Based on the latest 13F filing, Main Street Research LLC's top holdings by market value are: 1. Nvidia CORP (NVDA) — $108.3M (6.3%) 2. Apple INC (AAPL) — $102.4M (6.0%) 3. Alphabet Inc-cl A (GOOGL) — $89.7M (5.2%) 4. Ishares International Small (ISCF) — $81.9M (4.8%) 5. Taiwan Semiconductor-sp Adr (TSM) — $75.4M (4.4%)

What changes did Main Street Research LLC make in its most recent portfolio filing?

In the latest reported quarter, Main Street Research LLC made 50 notable position adjustments: 9 new positions were initiated, 28 existing holdings were added to, 10 positions were partially reduced, and 3 were completely exited. The largest of these moves: New buy: Corning INC (GLW); New buy: Bhp Group Ltd-spon Adr (BHP); New buy: AstraZeneca PLC (AZN); New buy: Royal Bank Of Canada (RY); Sold out: Astrazeneca Plc-spons Adr (AZNN)

What sectors does Main Street Research LLC focus on?

Main Street Research LLC is concentrated in the following sectors based on its current disclosed equity portfolio: • Information Technology: 42.7% • Communication Services: 13.0% • Health Care: 10.5% • Consumer Staples: 10.4% • Industrials: 8.5% • Financials: 8.0%

Peer Institutions

Institutions with a similar AUM

Barr E S & Co

CIK 0001040210

Total reported value

$1.7B

108 stks

2026-03-31

Concentration22.1

Portfolio Stability14.9

Sector conviction100.0

AUM within 0.0% of this institution

View detail

Atherton Lane Advisers, LLC

CIK 0001326196

Total reported value

$1.7B

231 stks

2015-12-31

Stale — no recent filing

Concentration6.5

Portfolio Stability21.3

Sector conviction45.3

AUM within 0.0% of this institution

View detail

Verdence Capital Advisors LLC

CIK 0001719305

Total reported value

$1.7B

653 stks

2026-03-31

Concentration3.6

Portfolio Stability25.0

Sector conviction57.4

AUM within 0.1% of this institution

View detail

Similar Holdings Style

Institutions with overlapping top holdings

Boston Common Asset Management, LLC

CIK 0001409427

Total reported value

$1.6B

186 stks

2026-03-31

Concentration6.8

Portfolio Stability19.7

Sector conviction52.3

4 of the top 5 holdings overlap, including Taiwan Semiconductor-sp Adr

View detail

William Blair Investment Management, LLC

CIK 0001644956

Total reported value

$30.3B

413 stks

2026-03-31

Concentration5.9

Portfolio Stability43.4

Sector conviction63.6

4 of the top 5 holdings overlap, including Taiwan Semiconductor-sp Adr

View detail

PCM Encore, LLC

CIK 0002109846

Total reported value

$486.1M

445 stks

2026-03-31

Concentration5.0

Portfolio Stability18.2

Sector conviction50.7

4 of the top 5 holdings overlap, including Nvidia CORP

View detail

Main Street Research LLC Holdings Report (13F Filings)

CIK: 0001513211

Diversified strategyMomentum followerQuality / disciplined sizing

Total reported value

$1.7B

Reporting period: 2026-03-31 · Number of holdings: 148

Main Street Research LLC disclosed 148 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $1.7B and a quarterly turnover rate of 48.3%.

Browse other institutions with $1B to $10B AUM Browse other institutions starting with "M"

Personality snowflake

Concentration: 13.08
Portfolio Stability: 48.26
Momentum/Contrarian: 100
Sector conviction: 71.62
Diversification: 100
Sizing Uniformity: 80.34

Position sizes vary widely across the portfolio (a coefficient of variation of 1.97), with a handful of outsized bets alongside many smaller positions.

No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.

Recent moves

Trim HOOD
-99.4%　-$60.0M
Trim V
-94.1%　-$58.0M
Trim MSFT
-59.8%　-$56.3M
Trim PLTR
-61.9%　-$53.7M
Add MU
+1949.8%　$35.3M
Trim UBER
-97.4%　-$35.7M

Holdings Map

New buyAddUnchangedTrim

Top 10 holdings by weight

Full holdings list this quarter

#	Ticker	Issuer	Asset Subclass	Weight	Weight Change	Shares Change
1	NVDA	Nvidia CORP	Stock-Tech	6.30%	-0.06%	+4.18%
2	AAPL	Apple INC	Stock-Tech	5.96%	+1.44%	+38.72%
3	GOOGL	Alphabet Inc-cl A	Stock-Comm Services	5.22%	-0.11%	+4.79%
4	ISCF	Ishares International Small	ETF-Other	4.76%	+0.23%	+2.66%
5	TSM	Taiwan Semiconductor-sp Adr	Stock-Tech	4.39%	+0.59%	+2.30%
6	XBI	Ss Spdr S&p Biotech ETF	ETF-Tech	4.22%	+1.71%	+57.40%
7	JPM	Jpmorgan Chase & Co	Stock-Financials	3.83%	-0.26%	+0.83%
8	AVGO	Broadcom INC	Stock-Tech	3.83%	-0.24%	+3.41%
9	MCK	Mckesson CORP	Stock-Healthcare	3.41%	+0.25%	+0.61%
10	AMZN	Amazon.com INC	Stock-Consumer Disc	3.26%	-0.17%	+3.60%
11	ASML	ASML Holding N.V.	Stock-Tech	3.20%	+0.74%	+3.91%
12	GLW	Corning INC	Stock-Tech	3.07%	+3.07%	NEW
13	COST	Costco Wholesale CORP	Stock-Consumer Staples	2.68%	-0.40%	-26.02%
14	JNJ	Johnson & Johnson	Stock-Healthcare	2.66%	+0.54%	+4.22%
15	EWY	Ishares Msci South Korea ETF	ETF-Other	2.59%	+0.61%	+1.80%
16	GEV	GE Vernova INC	Stock-Industrials	2.57%	+0.73%	+3.11%
17	GLDM	Spdr Gold Minishares Trust	ETF-Commodities	2.53%	+0.27%	+1.54%
18	CAT	Caterpillar INC	Stock-Industrials	2.52%	+0.57%	+2.60%
19	WMT	Walmart INC	Stock-Consumer Staples	2.49%	+0.33%	+1.91%
20	CCJ	Cameco CORP	Stock-Energy	2.46%	+0.46%	+1.89%
21	META	Meta Platforms Inc-class A	Stock-Comm Services	2.36%	-0.91%	-18.01%
22	APH	Amphenol Corp-cl A	Stock-Tech	2.21%	-0.08%	+1.93%
23	BHP	Bhp Group Ltd-spon Adr	Stock-Materials	2.20%	+2.20%	NEW
24	AZN	AstraZeneca PLC	Stock-Healthcare	2.19%	+2.19%	NEW
25	MU	Micron Technology INC	Stock-Tech	2.14%	+2.05%	+1949.77%
26	RY	Royal Bank Of Canada	Stock-Financials	2.10%	+2.10%	NEW
27	KEYS	Keysight Technologies In	Stock-Tech	1.86%	+1.86%	NEW
28	MSFT	Microsoft CORP	Stock-Tech	1.45%	-3.20%	-59.85%
29	PLTR	Palantir Technologies Inc-a	Stock-Tech	1.43%	-3.05%	-61.92%
30	PG	Procter & Gamble Co/the	Stock-Consumer Staples	1.27%	—	+0.36%
31	BCS	Barclays Plc-spons Adr	Stock-Financials	1.05%	-1.40%	-49.43%
32	FICO	Fair Isaac CORP	Stock-Tech	0.53%	+0.29%	+239.65%
33	IBIT	Ishares Bitcoin Trust ETF	ETF-Crypto	0.44%	-0.07%	+9.22%
34	GOOG	Alphabet Inc-cl C	Stock-Comm Services	0.39%	—	+16.65%
35	BRK-B	Berkshire Hathaway Inc-cl B	Stock-Other	0.33%	—	-1.14%
36	PANW	Palo Alto Networks INC	Stock-Tech	0.32%	+0.18%	+157.08%
37	MCD	Mcdonald's CORP	Stock-Consumer Disc	0.28%	-0.04%	-16.70%
38	TSLA	Tesla INC	Stock-Consumer Disc	0.27%	-0.06%	-3.22%
39	SCHW	Schwab (charles) CORP	Stock-Financials	0.25%	+0.07%	+45.87%
40	ANET	Arista Networks INC	Stock-Tech	0.25%	+0.25%	NEW
41	XOM	Exxon Mobil CORP	Stock-Energy	0.24%	+0.08%	+3.08%
42	WFC	Wells Fargo & Co	Stock-Financials	0.22%	+0.11%	+136.23%
43	BRK-A	Berkshire Hathaway Inc-cl A	Stock-Other	0.21%	—	—
44	CVX	Chevron CORP	Stock-Energy	0.20%	+0.12%	+77.01%
45	ADSK	Autodesk INC	Stock-Tech	0.20%	—	+0.78%
46	IXUS	Ishares Core Intl Stock ETF	ETF-Other	0.19%	—	+22.20%
47	V	Visa Inc-class A Shares	Stock-Financials	0.18%	-3.31%	-94.11%
48	LLY	Eli Lilly & Co	Stock-Healthcare	0.16%	+0.07%	+104.93%
49	URTH	Ishares Msci World ETF	ETF-Other	0.15%	—	-2.62%
50	ABBV	Abbvie INC	Stock-Healthcare	0.13%	—	+9.65%

1–50 of 148

Portfolio Performance

Performance for Q3 2026

+0.1%

Performance Last 4 Quarters

+12.9%

Based on 80% of reported portfolio value with available pricing

Stdev: +14.6%
Beta: +1.05
Alpha: 0%
Max Drawdown: -8.3%
Annualized Perf: +19.9%
Batting Avg vs S&P: +58.3%
Sortino: +2.7
Stutzer: +0.39
Treynor: +0.18
Sterling: +1.17
Calmar: +2.38
Information Ratio: +0.16
Tracking Error: +5.1%
Stdev Down: +7.1%
Winning Months %: +61.1%
Losing Months %: +38.9%
Best 12 Months: +35.6%
Worst 12 Months: +6.3%
Efficiency Ratio: +0.56
Sharpe: +1.32
Stdev Sectors: +11.9%
Skewness: +0.23
Kurtosis: +0.38
Upside Potential: +4.35

Reported value over time

Sector allocation

Sector allocation over time

Quarterly history

Period	Holdings	Total value	Stability	Top holdings
2026-03-31	148	$1.7B	48	1NVDA 2AAPL 3GOOGL Top holdings2026-03-31 1.NVDA 2.AAPL 3.GOOGL 4.ISCF 5.TSM 6.XBI 7.JPM 8.AVGO 9.MCK 10.AMZN
2025-12-31	129	$1.7B	35	1NVDA 2GOOGL 3MSFT Top holdings2025-12-31 1.NVDA 2.GOOGL 3.MSFT 4.ISCF 5.AAPL 6.PLTR 7.JPM 8.AVGO 9.TSM 10.V
2025-09-30	129	$1.9B	74	1NVDA 2AAPL 3MSFT Top holdings2025-09-30 1.NVDA 2.AAPL 3.MSFT 4.PLTR 5.HOOD 6.GOOGL 7.JPM 8.AVGO 9.META 10.TSM
2025-06-30	115	$1.6B	0	1NVDA 2JPM 3PG Top holdings2025-06-30 1.NVDA 2.JPM 3.PG 4.PLTR 5.COST 6.V 7.AAPL 8.NFLX 9.BRK-B 10.GOOGL
2025-03-31	101	$1.5B	100	1AAPL 2PLTR 3PG Top holdings2025-03-31 1.AAPL 2.PLTR 3.PG 4.V 5.AMZN 6.META 7.BRK-B 8.COST 9.JPM 10.MSFT
2024-12-31	110	$1.6B	0	1AAPL 2NVDA 3PLTR Top holdings2024-12-31 1.AAPL 2.NVDA 3.PLTR 4.AMZN 5.PG 6.IWM 7.AVGO 8.META 9.COST 10.MSFT
2024-09-30	109	$1.6B	0	1NVDA 2AAPL 3PG Top holdings2024-09-30 1.NVDA 2.AAPL 3.PG 4.IWM 5.AMZN 6.META 7.NVO 8.MSFT 9.COST 10.BRK-B
2024-06-30	103	$1.5B	0	1NVDA 2AAPL 3NVO Top holdings2024-06-30 1.NVDA 2.AAPL 3.NVO 4.PG 5.MCK 6.AMZN 7.MSFT 8.GOOGL 9.COST 10.META
2024-03-31	107	$1.5B	0	1NVDA 2IWM 3NVO Top holdings2024-03-31 1.NVDA 2.IWM 3.NVO 4.AAPL 5.PG 6.MCK 7.AMZN 8.MSFT 9.META 10.BRK-B
2023-12-31	106	$1.2B	0	1AAPL 2IWM 3PG Top holdings2023-12-31 1.AAPL 2.IWM 3.PG 4.NVO 5.MCK 6.MSFT 7.AMZN 8.V 9.NVDA 10.GOOGL
2023-09-30	91	$970.6M	0	1AAPL 2PG 3MCK Top holdings2023-09-30 1.AAPL 2.PG 3.MCK 4.NVO 5.MSFT 6.GOOGL 7.IWM 8.V 9.KO 10.CAT
2023-06-30	93	$627.4M	0	1AAPL 2PG 3MCK Top holdings2023-06-30 1.AAPL 2.PG 3.MCK 4.NVO 5.V 6.ELV 7.KO 8.UL 9.TMUS 10.GD
2023-03-31	91	$506.4M	0	1AAPL 2PG 3NVO Top holdings2023-03-31 1.AAPL 2.PG 3.NVO 4.MCK 5.V 6.ELV 7.KO 8.TMUS 9.GD 10.MSFT
2022-12-31	98	$410.7M	0	1PG 2MCK 3AAPL Top holdings2022-12-31 1.PG 2.MCK 3.AAPL 4.NVO 5.ELV 6.KO 7.V 8.GD 9.TMUS 10.AEP
2022-09-30	97	$454.0M	0	1UUP 2AAPL 3TBT Top holdings2022-09-30 1.UUP 2.AAPL 3.TBT 4.MCK 5.SH1USD 6.PG 7.ELV 8.NVO 9.KO 10.V
2022-06-30	86	$381.4M	0	1PG 2AAPL 3MCK Top holdings2022-06-30 1.PG 2.AAPL 3.MCK 4.TBT 5.ELV 6.NVO 7.KO 8.EOG 9.V 10.GD
2022-03-31	116	$1.1B	0	1AAPL 2PG 3COST Top holdings2022-03-31 1.AAPL 2.PG 3.COST 4.AMZN 5.NUE 6.GOOGL 7.CVX 8.MSFT 9.NVDA 10.MCK
2021-12-31	141	$1.3B	0	1AAPL 2PG 3NVDA Top holdings2021-12-31 1.AAPL 2.PG 3.NVDA 4.MSFT 5.IWM 6.ASML 7.NUE 8.AMZN 9.COST 10.ADBE
2021-09-30	137	$1.1B	0	1AAPL 2PG 3IWM Top holdings2021-09-30 1.AAPL 2.PG 3.IWM 4.AMZN 5.ASML 6.MSFT 7.ADBE 8.NUE 9.NVDA 10.DHR
2021-06-30	143	$1.2B	92	1AAPL 2PG 3IWM Top holdings2021-06-30 1.AAPL 2.PG 3.IWM 4.AMZN 5.00724f 6.MSFT 7.NUE 8.ASML 9.67066g 10.SWKS
2021-03-31	127	$1.1B	33	1PG 2AAPL 3IWM Top holdings2021-03-31 1.PG 2.AAPL 3.IWM 4.AMZN 5.ASML 6.CAT 7.00724f 8.NUE 9.MSFT 10.JD
2020-12-31	126	$929.8M	41	1PG 2AAPL 3AMZN Top holdings2020-12-31 1.PG 2.AAPL 3.AMZN 4.00724f 5.JD 6.IWM 7.MSFT 8.COST 9.ASML 10.DHR
2020-09-30	109	$785.3M	84	1PG 2AAPL 3AMZN Top holdings2020-09-30 1.PG 2.AAPL 3.AMZN 4.00724f 5.JD 6.MSFT 7.COST 8.DHR 9.67066g 10.SWKS
2020-06-30	97	$637.2M	63	1PG 2AAPL 3AMZN Top holdings2020-06-30 1.PG 2.AAPL 3.AMZN 4.ADBE 5.MSFT 6.JD 7.COST 8.NTES 9.DHR 10.DG
2020-03-31	78	$408.2M	97	1PG 2AAPL 3ADBE Top holdings2020-03-31 1.PG 2.AAPL 3.ADBE 4.AMZN 5.BIIB 6.COST 7.MSFT 8.GILD 9.VZ 10.NTES
2019-12-31	106	$634.2M	33	1PG 2EEM 3NEE Top holdings2019-12-31 1.PG 2.EEM 3.NEE 4.ASML 5.AAPL 6.ADBE 7.TGT 8.GOOGL 9.BABA 10.BIIB
2019-09-30	94	$533.1M	100	1PG 2NEE 3ASML Top holdings2019-09-30 1.PG 2.NEE 3.ASML 4.GOOGL 5.HD 6.ADBE 7.COST 8.TGT 9.VZ 10.AMZN
2019-06-30	91	$444.5M	90	1PG265339f3BHP Top holdings2019-06-30 1.PG 2.65339f 3.BHP 4.00724f 5.ASML 6.JNJ 7.02079k 8.UL 9.BSX 10.17275r
2019-03-31	90	$314.6M	24	1PG 2NEE 3BHP Top holdings2019-03-31 1.PG 2.NEE 3.BHP 4.ADBE 5.LW 6.DE 7.ASML 8.VZ 9.UL 10.AMZN
2018-12-31	76	$257.2M	100	1PG 2LW 3NEE Top holdings2018-12-31 1.PG 2.LW 3.NEE 4.BHP 5.DE 6.VZ 7.UL 8.AMZN 9.AAPL 10.SUI
2018-09-30	108	$696.5M	31	1IWM 2AMZN 3AAPL Top holdings2018-09-30 1.IWM 2.AMZN 3.AAPL 4.NFLX 5.UNH 6.67066g 7.79466l 8.46625h 9.92826c 10.02079k
2018-06-30	115	$638.7M	29	1IWM 2AMZN 3NFLX Top holdings2018-06-30 1.IWM 2.AMZN 3.NFLX 4.AAPL 5.UNH 6.46625h 7.79466l 8.RF 9.67066g 10.LW
2018-03-31	113	$631.9M	27	1IWM 2AMZN 3AAPL Top holdings2018-03-31 1.IWM 2.AMZN 3.AAPL 4.UNH 5.46625h 6.RF 7.CAT 8.NFLX 9.67066g 10.PG
2017-12-31	107	$657.0M	12	1IWM 2PG330303m Top holdings2017-12-31 1.IWM 2.PG 3.30303m 4.AAPL 5.UNH 6.CAT 7.LRCXEUR 8.46625h 9.AMZN 10.RF
2017-09-30	115	$619.7M	17	1IWM 2PG330303m Top holdings2017-09-30 1.IWM 2.PG 3.30303m 4.LRCXEUR 5.AAPL 6.UNH 7.46625h 8.CAT 9.JNJ 10.RF
2017-06-30	123	$612.2M	23	1IWM 2PG330303m Top holdings2017-06-30 1.IWM 2.PG 3.30303m 4.AAPL 5.UNH 6.JNJ 7.46625h 8.BCRUSD 9.LRCXEUR 10.RF
2017-03-31	115	$571.0M	26	1IWM 2PG330303m Top holdings2017-03-31 1.IWM 2.PG 3.30303m 4.AAPL 5.UNH 6.JNJ 7.46625h 8.RF 9.LRCXEUR 10.SUI
2016-12-31	108	$513.5M	50	1PG230303m3T Top holdings2016-12-31 1.PG 2.30303m 3.T 4.UNH 5.RF 6.46625h 7.JNJ 8.FITB 9.CVX 10.SUI
2016-09-30	107	$511.6M	27	1PG230303m3T Top holdings2016-09-30 1.PG 2.30303m 3.T 4.JNJ 5.CCI 6.SUI 7.UNH 8.AMGN 9.EIX 10.25746u
2016-06-30	105	$483.9M	24	1PG 2T330303m Top holdings2016-06-30 1.PG 2.T 3.30303m 4.CCI 5.BMY 6.JNJ 7.EIX 8.SUI 9.25746u 10.PSA
2016-03-31	94	$387.8M	33	1PG230303m3T Top holdings2016-03-31 1.PG 2.30303m 3.T 4.JNJ 5.25746u 6.EIX 7.BMY 8.CLX 9.UNH 10.AMGN
2015-12-31	117	$468.0M	21	1PG230303m3SCHW Top holdings2015-12-31 1.PG 2.30303m 3.SCHW 4.79466l 5.BMY 6.g0177j 7.AMGN 8.JNJ 9.T 10.CLX
2015-09-30	117	$426.3M	61	1PG230303m3g0177j Top holdings2015-09-30 1.PG 2.30303m 3.g0177j 4.SCHW 5.JNJ 6.AMGN 7.BMY 8.GD 9.79466l 10.25746u
2015-06-30	135	$488.3M	23	1PG 2AAPL 3BMRN Top holdings2015-06-30 1.PG 2.AAPL 3.BMRN 4.HD 5.g0177j 6.BMY 7.30303m 8.00971t 9.ASML 10.AMGN
2015-03-31	135	$465.0M	15	1PG 2AAPL 3HD Top holdings2015-03-31 1.PG 2.AAPL 3.HD 4.g0083b 5.BMRN 6.AMGN 7.00971t 8.BMY 9.30303m 10.ASML
2014-12-31	134	$467.0M	41	1PG2g0083b3AAPL Top holdings2014-12-31 1.PG 2.g0083b 3.AAPL 4.HD 5.AEP 6.AMGN 7.ASML 8.30303m 9.FDX 10.WELL
2014-09-30	134	$449.1M	19	1g0083b2PG 3AAPL Top holdings2014-09-30 1.g0083b 2.PG 3.AAPL 4.WEP 5.GILD 6.HD 7.CVX 8.DHR 9.XOM 10.AEP
2014-06-30	137	$424.1M	13	1g0083b2PG 3CVX Top holdings2014-06-30 1.g0083b 2.PG 3.CVX 4.WEP 5.AAPL 6.XOM 7.DHR 8.AEP 9.HD 10.89151e
2014-03-31	137	$411.7M	16	1g0083b2PG 3CVX Top holdings2014-03-31 1.g0083b 2.PG 3.CVX 4.XOM 5.WEP 6.DHR 7.HD 8.25746u 9.AEP 10.BMY
2013-12-31	145	$400.5M	13	1PG2g0083b3CVX Top holdings2013-12-31 1.PG 2.g0083b 3.CVX 4.XOM 5.DHR 6.HD 7.WEP 8.BMY 9.740189 10.AAPL
2013-09-30	137	$370.2M	27	1PG2g0083b3CVX Top holdings2013-09-30 1.PG 2.g0083b 3.CVX 4.XOM 5.ASML 6.DHR 7.966837 8.HD 9.WEP 10.BMY
2013-06-30	139	$331.1M	0	1PG200507k3CVX Top holdings2013-06-30 1.PG 2.00507k 3.CVX 4.HD 5.DHR 6.WEP 7.AEP 8.740189 9.BMY 10.92343v

Holding changes this quarter

Position changes disclosed by Main Street Research LLC for the quarter ending 2026-03-31, including ticker, issuer, weight change, shares change, and action
#	Ticker	Issuer	Weight Change	Shares Change	Action
1	MU	Micron Technology INC	+2.1%	+1949.77%	Add
2	XBI	Ss Spdr S&p Biotech ETF	+1.7%	+57.40%	Add
3	AAPL	Apple INC	+1.4%	+38.72%	Add
4	ASML	ASML Holding N.V.	+0.7%	+3.91%	Add
5	GEV	GE Vernova INC	+0.7%	+3.11%	Add
6	EWY	Ishares Msci South Korea ETF	+0.6%	+1.80%	Add
7	TSM	Taiwan Semiconductor-sp Adr	+0.6%	+2.30%	Add
8	CAT	Caterpillar INC	+0.6%	+2.60%	Add
9	JNJ	Johnson & Johnson	+0.5%	+4.22%	Add
10	CCJ	Cameco CORP	+0.5%	+1.89%	Add
11	WMT	Walmart INC	+0.3%	+1.91%	Add
12	FICO	Fair Isaac CORP	+0.3%	+239.65%	Add
13	GLDM	Spdr Gold Minishares Trust	+0.3%	+1.54%	Add
14	MCK	Mckesson CORP	+0.3%	+0.61%	Add
15	ISCF	Ishares International Small	+0.2%	+2.66%	Add
16	PANW	Palo Alto Networks INC	+0.2%	+157.08%	Add
17	CVX	Chevron CORP	+0.1%	+77.01%	Add
18	WFC	Wells Fargo & Co	+0.1%	+136.23%	Add
19	XOM	Exxon Mobil CORP	+0.1%	+3.08%	Add
20	SCHW	Schwab (charles) CORP	+0.1%	+45.87%	Add
21	LLY	Eli Lilly & Co	+0.1%	+104.93%	Add
22	MCD	Mcdonald's CORP	0%	-16.70%	Trim
23	NVDA	Nvidia CORP	-0.1%	+4.18%	Add
24	TSLA	Tesla INC	-0.1%	-3.22%	Trim
25	IBIT	Ishares Bitcoin Trust ETF	-0.1%	+9.22%	Add
26	APH	Amphenol Corp-cl A	-0.1%	+1.93%	Add
27	GOOGL	Alphabet Inc-cl A	-0.1%	+4.79%	Add
28	AMZN	Amazon.com INC	-0.2%	+3.60%	Add
29	AVGO	Broadcom INC	-0.2%	+3.41%	Add
30	JPM	Jpmorgan Chase & Co	-0.3%	+0.83%	Add
31	COST	Costco Wholesale CORP	-0.4%	-26.02%	Trim
32	META	Meta Platforms Inc-class A	-0.9%	-18.01%	Trim
33	BCS	Barclays Plc-spons Adr	-1.4%	-49.43%	Trim
34	UBER	Uber Technologies INC	-2%	-97.43%	Trim
35	PLTR	Palantir Technologies Inc-a	-3.1%	-61.92%	Trim
36	MSFT	Microsoft CORP	-3.2%	-59.85%	Trim
37	V	Visa Inc-class A Shares	-3.3%	-94.11%	Trim
38	HOOD	Robinhood Markets INC - A	-3.4%	-99.38%	Trim
39	GLW	Corning INC	—	NEW	New buy
40	BHP	Bhp Group Ltd-spon Adr	—	NEW	New buy
41	AZN	AstraZeneca PLC	—	NEW	New buy
42	RY	Royal Bank Of Canada	—	NEW	New buy
43	AZNN	Astrazeneca Plc-spons Adr	—	EXIT	Sold out
44	KEYS	Keysight Technologies In	—	NEW	New buy
45	IBN	Icici Bank Ltd-spon Adr	—	EXIT	Sold out
46	BKNG	Booking Holdings INC	—	EXIT	Sold out
47	ANET	Arista Networks INC	—	NEW	New buy
48	DIS	Walt Disney Co/the	—	NEW	New buy
49	PHM	Pultegroup INC	—	NEW	New buy
50	CRUS	Cirrus Logic INC	—	NEW	New buy

Filing History

Period	Filed	Type	EDGAR
2026-03-31	2026-04-30	13F-HR	View on EDGAR
2025-12-31	2026-02-09	13F-HR	View on EDGAR
2025-09-30	2025-11-13	13F-HR	View on EDGAR
2025-06-30	2025-08-05	13F-HR	View on EDGAR
2025-03-31	2025-04-30	13F-HR	View on EDGAR
2024-12-31	2025-02-07	13F-HR	View on EDGAR
2024-09-30	2024-11-12	13F-HR	View on EDGAR
2024-06-30	2024-07-29	13F-HR	View on EDGAR
2024-03-31	2024-05-01	13F-HR	View on EDGAR
2023-12-31	2024-01-30	13F-HR	View on EDGAR
2023-09-30	2023-11-03	13F-HR	View on EDGAR
2023-06-30	2023-08-08	13F-HR	View on EDGAR
2023-03-31	2023-05-01	13F-HR	View on EDGAR
2022-12-31	2023-02-06	13F-HR	View on EDGAR
2022-09-30	2022-11-14	13F-HR	View on EDGAR
2022-06-30	2022-08-12	13F-HR	View on EDGAR
2022-03-31	2022-05-05	13F-HR	View on EDGAR
2021-12-31	2022-02-09	13F-HR	View on EDGAR
2021-09-30	2021-11-12	13F-HR	View on EDGAR
2021-06-30	2021-08-06	13F-HR	View on EDGAR
2021-03-31	2021-05-07	13F-HR	View on EDGAR
2020-12-31	2021-02-12	13F-HR	View on EDGAR
2020-09-30	2020-11-10	13F-HR	View on EDGAR
2020-06-30	2020-07-29	13F-HR	View on EDGAR
2020-03-31	2020-05-01	13F-HR	View on EDGAR
2019-12-31	2020-01-28	13F-HR	View on EDGAR
2019-09-30	2019-10-21	13F-HR	View on EDGAR
2019-06-30	2019-08-08	13F-HR	View on EDGAR
2019-03-31	2019-05-13	13F-HR	View on EDGAR
2018-12-31	2019-02-13	13F-HR	View on EDGAR
2018-09-30	2018-11-05	13F-HR	View on EDGAR
2018-06-30	2018-07-25	13F-HR	View on EDGAR
2018-03-31	2018-05-08	13F-HR	View on EDGAR
2018-03-31	2018-05-08	Amendment	View on EDGAR
2017-12-31	2018-02-05	13F-HR	View on EDGAR
2017-09-30	2017-10-16	13F-HR	View on EDGAR
2017-06-30	2017-07-18	13F-HR	View on EDGAR
2017-03-31	2017-05-04	13F-HR	View on EDGAR
2016-12-31	2017-02-03	13F-HR	View on EDGAR
2016-09-30	2016-11-10	13F-HR	View on EDGAR
2016-06-30	2016-08-11	13F-HR	View on EDGAR
2016-03-31	2016-05-13	13F-HR	View on EDGAR
2015-12-31	2016-02-04	13F-HR	View on EDGAR
2015-09-30	2015-11-12	13F-HR	View on EDGAR
2015-06-30	2015-07-23	13F-HR	View on EDGAR
2015-03-31	2015-05-12	13F-HR	View on EDGAR
2014-12-31	2015-02-09	13F-HR	View on EDGAR
2014-09-30	2014-11-13	13F-HR	View on EDGAR
2014-06-30	2014-08-11	13F-HR	View on EDGAR
2014-03-31	2014-05-12	13F-HR	View on EDGAR
2013-12-31	2014-02-06	13F-HR	View on EDGAR
2013-09-30	2013-11-12	13F-HR	View on EDGAR
2013-06-30	2013-08-01	13F-HR	View on EDGAR