Main Street Research LLC
In its 13F for Q1 2026 (holdings as of March 31, 2026, filed April 30, 2026), Main Street Research LLC reported 148 stock positions worth $1.7 billion. Its top holding was Nvidia (NVDA) at 6.3% of the portfolio, followed by Apple (AAPL, 6.0%) and Alphabet Class A (GOOGL, 5.2%). Compared with Q4 2025, it opened 30 new positions, sold out of 11, added to 76 and reduced 36. The biggest buy was a new position in Corning (GLW) and the biggest sale Robinhood Markets Class A (HOOD, shares −99%).
- Most Recent 13F
- Q2 2026
- Location
- SAUSALITO, CA
- CIK
- 0001513211
- Portfolio Value
- $1.7B (Q1 2026)
- SEC Filing
- 0001420506-26-000773 ↗ filed Apr 30, 2026
Holdings Value
Holdings 148 stocks · $1.7B
| NVDA Nvidia Corp. | 6.30% | 620,776 | $108.3M | Add +4.2% |
| AAPL Apple Inc. | 5.96% | 403,578 | $102.4M | Add +38.7% |
| GOOGL Alphabet Inc. Class A | 5.22% | 311,786 | $89.7M | Add +4.8% |
| ISCF iShares International Small | 4.76% | 1,958,627 | $81.9M | Add +2.7% |
| TSM Taiwan Semiconductor-SP ADR | 4.39% | 223,159 | $75.4M | Add +2.3% |
| XBI SS SPDR S&P Biotech ETF | 4.22% | 567,479 | $72.5M | Add +57.4% |
| JPM JPMorgan Chase & Co. | 3.83% | 223,762 | $65.8M | Add +0.8% |
| AVGO Broadcom Inc. | 3.83% | 212,402 | $65.7M | Add +3.4% |
| MCK McKesson Corp. | 3.41% | 67,774 | $58.6M | Add +0.6% |
| AMZN Amazon.com Inc. | 3.26% | 269,193 | $56.1M | Add +3.6% |
| ASML ASML Holding NV-NY Reg SHS filed as ASML HLDG NV | 3.20% | 41,687 | $55.1M | Add +3.9% |
| GLW Corning Inc. | 3.07% | 387,718 | $52.7M | New |
| COST Costco Wholesale Corp. | 2.68% | 46,139 | $46.0M | Reduce -26.0% |
| JNJ Johnson & Johnson | 2.66% | 186,882 | $45.7M | Add +4.2% |
| EWY iShares MSCI South Korea ETF | 2.59% | 361,874 | $44.5M | Add +1.8% |
| GEV GE Vernova Inc. | 2.57% | 50,692 | $44.2M | Add +3.1% |
| GLDM SPDR Gold Minishares Trust | 2.53% | 469,451 | $43.5M | Add +1.5% |
| CAT Caterpillar Inc. | 2.52% | 61,110 | $43.3M | Add +2.6% |
| WMT Walmart Inc. | 2.49% | 344,869 | $42.9M | Add +1.9% |
| CCJ Cameco Corp. | 2.46% | 389,077 | $42.3M | Add +1.9% |
| META Meta Platforms Inc. Class A | 2.36% | 70,962 | $40.6M | Reduce -18.0% |
| APH Amphenol Corp. Class A | 2.21% | 301,043 | $38.0M | Add +1.9% |
| BHP BHP Group Ltd.-Spon ADR filed as BHP BILLITON LIMITED | 2.20% | 519,212 | $37.8M | New |
| AZN Astrazeneca PLC | 2.19% | 190,644 | $37.6M | Add +2.7% |
| MU Micron Technology Inc. | 2.14% | 109,109 | $36.9M | Add +1949.8% |
| RY Royal Bank of Canada | 2.10% | 222,568 | $36.0M | New |
| KEYS Keysight Technologies Inc. | 1.86% | 112,937 | $31.9M | New |
| MSFT Microsoft Corp. | 1.45% | 67,542 | $25.0M | Reduce -59.9% |
| PLTR Palantir Technologies Inc. Class A | 1.43% | 167,647 | $24.5M | Reduce -61.9% |
| PG The Procter & Gamble Co. | 1.27% | 151,627 | $21.9M | Add +0.4% |
| BCS Barclays PLC-Spons ADR | 1.05% | 850,971 | $18.0M | Reduce -49.4% |
| FICO Fair Isaac Corp. | 0.53% | 8,464 | $9.0M | Add +239.7% |
| IBIT iShares Bitcoin Trust ETF | 0.44% | 196,085 | $7.5M | Add +9.2% |
| GOOG Alphabet Inc. Class C | 0.39% | 23,437 | $6.7M | Add +16.6% |
| BRK.B Berkshire Hathaway Inc. Class B | 0.33% | 11,978 | $5.7M | Reduce -1.1% |
| PANW Palo Alto Networks Inc. | 0.32% | 34,024 | $5.5M | Add +157.1% |
| MCD McDonald's Corp. | 0.28% | 15,483 | $4.8M | Reduce -16.7% |
| TSLA Tesla Inc. | 0.27% | 12,337 | $4.6M | Reduce -3.2% |
| SCHW Schwab (charles) Corp. | 0.25% | 46,360 | $4.4M | Add +45.9% |
| ANET Arista Networks Inc. | 0.25% | 34,981 | $4.3M | New |
| XOM Exxon Mobil Corp. | 0.24% | 23,924 | $4.1M | Add +3.1% |
| WFC Wells Fargo & Co. | 0.22% | 46,882 | $3.7M | Add +136.2% |
| BRK.A Berkshire Hathaway Inc. Class A | 0.21% | 5 | $3.6M | No change |
| CVX Chevron Corp. | 0.20% | 16,851 | $3.5M | Add +77.0% |
| ADSK Autodesk Inc. | 0.20% | 14,403 | $3.4M | Add +0.8% |
| IXUS iShares Core Intl Stock ETF | 0.19% | 38,583 | $3.3M | Add +22.2% |
| V Visa Inc. Class A | 0.18% | 10,246 | $3.1M | Reduce -94.1% |
| LLY Eli Lilly & Co. | 0.16% | 2,908 | $2.7M | Add +104.9% |
| URTH iShares MSCI World ETF | 0.15% | 14,742 | $2.7M | Reduce -2.6% |
| ABBV Abbvie Inc. | 0.13% | 10,258 | $2.2M | Add +9.7% |
| SPY SS SPDR S&P 500 ETF Trust-US | 0.12% | 3,263 | $2.1M | Add +22.5% |
| IVV iShares Core S&P 500 ETF | 0.10% | 2,554 | $1.7M | Add +102.7% |
| CRM Salesforce Inc. | 0.08% | 6,924 | $1.3M | Add +8.8% |
| RTX RTX Corp. | 0.07% | 6,066 | $1.2M | Add +10.4% |
| ISTB iShares Core 1-5 Year Usd Bo | 0.07% | 24,058 | $1.2M | Add +5.7% |
| MRK Merck & Co. Inc. | 0.07% | 9,521 | $1.1M | Add +22.3% |
| MMM 3M Co. | 0.07% | 7,870 | $1.1M | Reduce -2.4% |
| DIS The Walt Disney Co. filed as DISNEY WALT CO | 0.06% | 10,730 | $1.0M | New |
| QQQ Invesco QQQ Trust Series 1 | 0.06% | 1,769 | $1.0M | Add +31.5% |
| SCHI Schwab 5-10 Year Corporate B | 0.06% | 44,326 | $1.0M | Add +15.2% |
| UNP Union Pacific Corp. | 0.06% | 4,129 | $1.0M | Add +76.3% |
| CLX Clorox Company | 0.06% | 9,537 | $988K | Add +4.5% |
| IGLB iShares 10+ Year Inv GR Corp. | 0.05% | 18,751 | $931K | Add +17.6% |
| PHM Pultegroup Inc. | 0.05% | 7,382 | $868K | New |
| CRUS Cirrus Logic Inc. | 0.05% | 5,734 | $829K | New |
| UBER Uber Technologies Inc. | 0.05% | 11,491 | $827K | Reduce -97.4% |
| VOO Vanguard S&P 500 ETF | 0.05% | 1,332 | $796K | Add +159.7% |
| CSCO Cisco Systems Inc. | 0.05% | 10,057 | $780K | Add +3.9% |
| GLD SPDR Gold Shares | 0.05% | 1,806 | $777K | Add +162.1% |
| GS Goldman Sachs Group Inc. | 0.04% | 874 | $739K | New |
| DIA SS SPDR Dow Jones Indus Avg filed as STATE STR SPDR DOW JONES IND | 0.04% | 1,502 | $696K | Add +134.7% |
| CW Curtiss-Wright Corp. | 0.04% | 1,012 | $689K | Add +10.4% |
| TXN Texas Instruments Inc. | 0.04% | 3,527 | $685K | Add +91.5% |
| ON On Semiconductor | 0.04% | 10,350 | $641K | New |
| AMD Advanced Micro Devices | 0.04% | 3,145 | $640K | Reduce -8.1% |
| HSBC HSBC Holdings PLC-Spons ADR filed as HSBC HLDGS PLC | 0.04% | 7,733 | $638K | Add +0.5% |
| CL Colgate-Palmolive Co. | 0.04% | 7,484 | $638K | Add +13.1% |
| C Citigroup Inc. | 0.04% | 5,526 | $627K | Add +16.6% |
| BX Blackstone Inc. | 0.04% | 5,317 | $611K | New |
| T AT&T Inc. | 0.03% | 20,193 | $585K | Add +45.1% |
| BAC Bank of America Corp. filed as BANK AMERICA CORP | 0.03% | 11,943 | $582K | Add +7.4% |
| SYK Stryker Corp. | 0.03% | 1,763 | $579K | Reduce -4.3% |
| PEP Pepsico Inc. | 0.03% | 3,722 | $578K | Add +75.9% |
| DHI D.R. Horton Inc. | 0.03% | 3,808 | $523K | New |
| MUFG Mitsubishi Ufj Finl-Spon ADR | 0.03% | 30,448 | $517K | Add +0.8% |
| ORCL Oracle Corp. | 0.03% | 3,497 | $514K | Add +15.4% |
| ADI Analog Devices Inc. | 0.03% | 1,491 | $474K | Add +19.5% |
| NTES Netease Inc.-ADR | 0.03% | 4,085 | $457K | Add +2.1% |
| ADP Automatic Data Processing | 0.03% | 2,232 | $453K | Reduce -3.3% |
| TMO Thermo Fisher Scientific Inc. | 0.03% | 900 | $442K | Reduce -21.8% |
| LRCX Lam Research Corp. | 0.02% | 1,988 | $425K | Add +30.4% |
| BMY Bristol-Myers Squibb Co. | 0.02% | 6,942 | $421K | Reduce -52.5% |
| VTI VG Morningstar TS MKT ETF-US | 0.02% | 1,289 | $414K | Reduce -16.2% |
| XYL Xylem Inc. | 0.02% | 3,319 | $397K | Add +0.4% |
| ABT Abbott Laboratories | 0.02% | 3,859 | $396K | Add +5.6% |
| TT Trane Technologies PLC | 0.02% | 947 | $395K | No change |
| CMCSA Comcast Corp. Class A | 0.02% | 13,520 | $388K | Add +23.9% |
| ISRG Intuitive Surgical Inc. | 0.02% | 839 | $387K | Add +65.2% |
| EBAY eBay Inc. | 0.02% | 4,175 | $380K | Add +27.1% |
| BSX Boston Scientific Corp. | 0.02% | 5,993 | $376K | Reduce -0.5% |
Portfolio Sells Q4 2025 → Q1 2026
| HOOD Robinhood Markets Inc. Class A | Reduce -99.4% | 0.01% | −3.43 |
| V Visa Inc. Class A | Reduce -94.1% | 0.18% | −3.31 |
| MSFT Microsoft Corp. | Reduce -59.9% | 1.45% | −3.20 |
| PLTR Palantir Technologies Inc. Class A | Reduce -61.9% | 1.43% | −3.05 |
| UBER Uber Technologies Inc. | Reduce -97.4% | 0.05% | −2.04 |
| IBN Icici Bank Ltd.-Spon ADR | Sold out | 0.00% | −1.74 |
| BCS Barclays PLC-Spons ADR | Reduce -49.4% | 1.05% | −1.40 |
| BKNG Booking Holdings Inc. | Sold out | 0.00% | −1.17 |
| META Meta Platforms Inc. Class A | Reduce -18.0% | 2.36% | −0.91 |
| COST Costco Wholesale Corp. | Reduce -26.0% | 2.68% | −0.40 |
| TSLA Tesla Inc. | Reduce -3.2% | 0.27% | −0.06 |
| MCD McDonald's Corp. | Reduce -16.7% | 0.28% | −0.04 |
| NFLX Netflix Inc. | Reduce -74.8% | 0.01% | −0.04 |
| VIG Vanguard Dividend Apprec ETF | Sold out | 0.00% | −0.03 |
| ITOT iShares Core S&P Total U.S. | Sold out | 0.00% | −0.03 |
| HUT Hut 8 Corp. | Sold out | 0.00% | −0.02 |
| BMY Bristol-Myers Squibb Co. | Reduce -52.5% | 0.02% | −0.02 |
| TRMB Trimble Inc. | Sold out | 0.00% | −0.02 |
| LIN Linde PLC | Sold out | 0.00% | −0.01 |
| BRK.B Berkshire Hathaway Inc. Class B | Reduce -1.1% | 0.33% | −0.01 |
| IBM Intl Business Machines Corp. | Sold out | 0.00% | −0.01 |
| GILD Gilead Sciences Inc. | Sold out | 0.00% | −0.01 |
| TMO Thermo Fisher Scientific Inc. | Reduce -21.8% | 0.03% | −0.01 |
| ACN Accenture PLC Class A | Reduce -18.3% | 0.02% | −0.01 |
| BN Brookfield Corp. | Sold out | 0.00% | −0.01 |
| TMUS T-Mobile US Inc. | Reduce -50.5% | 0.01% | −0.01 |
| INTU Intuit Inc. | Reduce -8.6% | 0.02% | −0.01 |
| HIMS Hims & Hers Health Inc. | Sold out | 0.00% | −0.01 |
| BSX Boston Scientific Corp. | Reduce -0.5% | 0.02% | −0.01 |
| ADP Automatic Data Processing | Reduce -3.3% | 0.03% | −0.01 |
| MMM 3M Co. | Reduce -2.4% | 0.07% | −0.01 |
| URTH iShares MSCI World ETF | Reduce -2.6% | 0.15% | −0.01 |
| HD Home Depot Inc. | Reduce -28.7% | 0.01% | −0.01 |
| VTI VG Morningstar TS MKT ETF-US | Reduce -16.2% | 0.02% | −0.01 |
| AON Aon PLC Class A | Reduce -24.2% | 0.01% | −0.00 |
| AMD Advanced Micro Devices | Reduce -8.1% | 0.04% | −0.00 |
| COIN Coinbase Global Inc. Class A | Reduce -0.1% | 0.02% | −0.00 |
| NSC Norfolk Southern Corp. | Reduce -21.5% | 0.01% | −0.00 |
| AXP American Express Co. | Reduce -5.4% | 0.01% | −0.00 |
| IWF iShares Russell 1000 Growth | Reduce -9.3% | 0.02% | −0.00 |
| SYK Stryker Corp. | Reduce -4.3% | 0.03% | −0.00 |
| SJM The JM Smucker Co. | Reduce -14.2% | 0.02% | −0.00 |
| FNDX Schwab Fndmntl US LRG Co. ETF | Reduce -14.2% | 0.01% | −0.00 |
| PH Parker Hannifin Corp. | Reduce -10.6% | 0.01% | −0.00 |
| NEE Nextera Energy Inc. | Reduce -18.9% | 0.01% | −0.00 |
| KLAC KLA Corp. | Reduce -20.6% | 0.02% | −0.00 |
| INTC Intel Corp. | Reduce -13.8% | 0.02% | +0.00 |
Portfolio Buys Q4 2025 → Q1 2026
| GLW Corning Inc. | New | 3.07% | +3.07 |
| BHP BHP Group Ltd.-Spon ADR | New | 2.20% | +2.20 |
| RY Royal Bank of Canada | New | 2.10% | +2.10 |
| MU Micron Technology Inc. | Add +1949.8% | 2.14% | +2.06 |
| KEYS Keysight Technologies Inc. | New | 1.86% | +1.86 |
| XBI SS SPDR S&P Biotech ETF | Add +57.4% | 4.22% | +1.70 |
| AAPL Apple Inc. | Add +38.7% | 5.96% | +1.44 |
| ASML ASML Holding NV-NY Reg SHS | Add +3.9% | 3.20% | +0.75 |
| GEV GE Vernova Inc. | Add +3.1% | 2.57% | +0.74 |
| EWY iShares MSCI South Korea ETF | Add +1.8% | 2.59% | +0.61 |
| TSM Taiwan Semiconductor-SP ADR | Add +2.3% | 4.39% | +0.59 |
| CAT Caterpillar Inc. | Add +2.6% | 2.52% | +0.57 |
| JNJ Johnson & Johnson | Add +4.2% | 2.66% | +0.54 |
| CCJ Cameco Corp. | Add +1.9% | 2.46% | +0.46 |
| WMT Walmart Inc. | Add +1.9% | 2.49% | +0.33 |
| FICO Fair Isaac Corp. | Add +239.7% | 0.53% | +0.28 |
| GLDM SPDR Gold Minishares Trust | Add +1.5% | 2.53% | +0.27 |
| ANET Arista Networks Inc. | New | 0.25% | +0.25 |
| MCK McKesson Corp. | Add +0.6% | 3.41% | +0.25 |
| ISCF iShares International Small | Add +2.7% | 4.76% | +0.24 |
| AZN Astrazeneca PLC | Add +2.7% | 2.19% | +0.24 |
| PANW Palo Alto Networks Inc. | Add +157.1% | 0.32% | +0.18 |
| CVX Chevron Corp. | Add +77.0% | 0.20% | +0.12 |
| WFC Wells Fargo & Co. | Add +136.2% | 0.22% | +0.11 |
| XOM Exxon Mobil Corp. | Add +3.1% | 0.24% | +0.08 |
| SCHW Schwab (charles) Corp. | Add +45.9% | 0.25% | +0.07 |
| LLY Eli Lilly & Co. | Add +104.9% | 0.16% | +0.07 |
| DIS The Walt Disney Co. | New | 0.06% | +0.06 |
| PHM Pultegroup Inc. | New | 0.05% | +0.05 |
| CRUS Cirrus Logic Inc. | New | 0.05% | +0.05 |
| IVV iShares Core S&P 500 ETF | Add +102.7% | 0.10% | +0.05 |
| GS Goldman Sachs Group Inc. | New | 0.04% | +0.04 |
| IXUS iShares Core Intl Stock ETF | Add +22.2% | 0.19% | +0.04 |
| ON On Semiconductor | New | 0.04% | +0.04 |
| PG The Procter & Gamble Co. | Add +0.4% | 1.27% | +0.04 |
| BX Blackstone Inc. | New | 0.04% | +0.04 |
| GOOG Alphabet Inc. Class C | Add +16.6% | 0.39% | +0.03 |
| DHI D.R. Horton Inc. | New | 0.03% | +0.03 |
| GLD SPDR Gold Shares | Add +162.1% | 0.05% | +0.03 |
| VOO Vanguard S&P 500 ETF | Add +159.7% | 0.05% | +0.03 |
| UNP Union Pacific Corp. | Add +76.3% | 0.06% | +0.03 |
| DIA SS SPDR Dow Jones Indus Avg | Add +134.7% | 0.04% | +0.02 |
| XLK SS Technology Select Sector | New | 0.02% | +0.02 |
| TXN Texas Instruments Inc. | Add +91.5% | 0.04% | +0.02 |
| PTC PTC Inc. | New | 0.02% | +0.02 |
| LEN Lennar Corp. Class A | New | 0.02% | +0.02 |
| IT Gartner Inc. | New | 0.02% | +0.02 |
| FTNT Fortinet Inc. | New | 0.02% | +0.02 |
| MRK Merck & Co. Inc. | Add +22.3% | 0.07% | +0.02 |
| SPY SS SPDR S&P 500 ETF Trust-US | Add +22.5% | 0.12% | +0.02 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 140 | $2.1B | NVDA, MU, AAPL, GOOGL, TSM |
| Q1 2026 | 148 | $1.7B | NVDA, AAPL, GOOGL, ISCF, TSM |
| Q4 2025 | 129 | $1.7B | NVDA, GOOGL, MSFT, ISCF, AAPL |
| Q3 2025 | 129 | $1.9B | NVDA, AAPL, MSFT, PLTR, HOOD |
| Q2 2025 | 115 | $1.6B | NVDA, JPM, PG, PLTR, COST |
| Q1 2025 | 101 | $1.5B | AAPL, PLTR, PG, V, AMZN |
| Q4 2024 | 110 | $1.6B | AAPL, NVDA, PLTR, AMZN, PG |
| Q3 2024 | 109 | $1.6B | NVDA, AAPL, PG, IWM, AMZN |
| Q2 2024 | 103 | $1.5B | NVDA, AAPL, NVO, PG, MCK |
| Q1 2024 | 107 | $1.5B | NVDA, IWM, NVO, AAPL, PG |