Main Street Research Llc Portfolio Stock Holdings
According to the SEC 13F filed on July 29, 2026, Main Street Research Llc disclosed 139 stock positions valued at approximately $2.12B as of quarter-end June 30, 2026. The largest holdings include NVIDIA CORPORATION, MICRON TECHNOLOGY INC, and APPLE INC.
- Report Period
- June 30, 2026
- No. of Stocks
- 139
- Portfolio Value
- $2.12B
Holdings by Sector
Main Street Research Llc Portfolio Holdings in Q2 2026
| Company | Symbol | Sector | Portfolio % | Shares | Change (Shares) | Change % | Value |
|---|---|---|---|---|---|---|---|
| NVIDIA CORPORATION | NVDA | Technology | 5.95% | 630,053 | +9,277 | +1.49% | $126,067,297 |
| MICRON TECHNOLOGY INC | MU | Technology | 5.92% | 108,636 | -473 | -0.43% | $125,397,358 |
| APPLE INC | AAPL | Technology | 5.55% | 406,129 | +2,551 | +0.63% | $117,517,404 |
| ALPHABET INC | GOOGL | Communication Services | 5.35% | 316,947 | +5,161 | +1.66% | $113,267,393 |
| TAIWAN SEMICONDUCTOR MANUFAC | TSM | Technology | 5.15% | 228,429 | +5,270 | +2.36% | $109,090,838 |
| CORNING INC | GLW | Technology | 4.75% | 394,058 | +6,340 | +1.64% | $100,654,235 |
| SPDR SERIES TRUST | XBI | Other | 4.31% | 576,754 | +9,275 | +1.63% | $91,271,321 |
| ISHARES TR | ISCF | Other | 4.14% | 2,027,356 | +68,729 | +3.51% | $87,764,241 |
| ASML HLDG NV | ASML | Other | 3.98% | 42,396 | +709 | +1.70% | $84,344,300 |
| BROADCOM INC | AVGO | Technology | 3.81% | 213,841 | +1,439 | +0.68% | $80,778,363 |
| JPMORGAN CHASE & CO | JPM | Financial Services | 3.50% | 226,299 | +2,537 | +1.13% | $74,074,475 |
| ISHARES INC | EWY | Other | 3.44% | 360,865 | -1,009 | -0.28% | $72,858,644 |
| CATERPILLAR INC | CAT | Industrials | 3.10% | 61,759 | +649 | +1.06% | $65,767,159 |
| AMAZON COM INC | AMZN | Consumer Cyclical | 3.09% | 274,738 | +5,545 | +2.06% | $65,480,981 |
| GE VERNOVA INC | GEV | Utilities | 2.82% | 50,802 | +110 | +0.22% | $59,685,399 |
| AMPHENOL CORP | APH | Technology | 2.57% | 308,716 | +7,673 | +2.55% | $54,432,855 |
| JOHNSON & JOHNSON | JNJ | Healthcare | 2.26% | 188,640 | +1,758 | +0.94% | $47,908,843 |
| ROYAL BK CDA | RY | Financial Services | 2.22% | 227,136 | +4,568 | +2.05% | $47,010,338 |
| COSTCO WHOLESALE CORPORATION | COST | Consumer Defensive | 2.10% | 47,497 | +1,358 | +2.94% | $44,432,468 |
| BHP BILLITON LIMITED | BHP | Basic Materials | 2.08% | 528,051 | +8,839 | +1.70% | $43,991,929 |
| BARCLAYS PLC | BCS | Financial Services | 2.06% | 1,621,490 | +770,519 | +90.55% | $43,553,224 |
| META PLATFORMS INC | META | Communication Services | 1.92% | 72,187 | +1,225 | +1.73% | $40,662,490 |
| KEYSIGHT TECHNOLOGIES INC | KEYS | Technology | 1.90% | 115,108 | +2,171 | +1.92% | $40,295,858 |
| CAMECO CORP | CCJ | Energy | 1.88% | 391,529 | +2,452 | +0.63% | $39,881,144 |
| WALMART INC | WMT | Consumer Defensive | 1.86% | 348,650 | +3,781 | +1.10% | $39,488,132 |
| ROSS STORES INC | ROST | Consumer Cyclical | 1.51% | 150,755 | +150,755 | +100.00% | $32,088,202 |
| TECHNIPFMC PLC | FTI | Energy | 1.29% | 413,657 | +413,657 | +100.00% | $27,425,459 |
| MICROSOFT CORP | MSFT | Technology | 1.22% | 69,182 | +1,640 | +2.43% | $25,806,278 |
| PROCTER & GAMBLE CO | PG | Consumer Defensive | 1.05% | 151,073 | -554 | -0.37% | $22,153,275 |
| MCKESSON CORP | MCK | Healthcare | 1.02% | 28,475 | -39,299 | -57.99% | $21,516,028 |
Showing 30 of 139 holdings in the latest reporting period.