Main Street Research LLC 13F Holdings · Q2 2026
Main Street Research LLC reported 140 securities worth $2.12B in its SEC 13F filing for Q2 2026 (period ended 2026-06-30). Top holdings: NVDA (5.95%), MU (5.92%), AAPL (5.55%). Among its top 25 positions this quarter: 23 added, 2 trimmed.
| Rank | Ticker | Company | Value | % Portfolio | Shares | Action |
|---|---|---|---|---|---|---|
| 1 | NVDA | NVIDIA CORPORATION | $126.1M | 5.95% | 630,053 | Added |
| 2 | MU | MICRON TECHNOLOGY INC | $125.4M | 5.92% | 108,636 | Trimmed |
| 3 | AAPL | APPLE INC | $117.5M | 5.55% | 406,129 | Added |
| 4 | GOOGL | ALPHABET INC | $113.3M | 5.35% | 316,947 | Added |
| 5 | TSM | TAIWAN SEMICONDUCTOR MANUFAC | $109.1M | 5.15% | 228,429 | Added |
| 6 | GLW | CORNING INC | $100.7M | 4.75% | 394,058 | Added |
| 7 | XBI | SPDR SERIES TRUST | $91.3M | 4.31% | 576,754 | Added |
| 8 | ISCF | ISHARES TR | $87.8M | 4.14% | 2.0M | Added |
| 9 | ASML | ASML HLDG NV | $84.3M | 3.98% | 42,396 | Added |
| 10 | AVGO | BROADCOM INC | $80.8M | 3.81% | 213,841 | Added |
| 11 | JPM | JPMORGAN CHASE & CO | $74.1M | 3.50% | 226,299 | Added |
| 12 | EWY | ISHARES INC | $72.9M | 3.44% | 360,865 | Trimmed |
| 13 | CAT | CATERPILLAR INC | $65.8M | 3.10% | 61,759 | Added |
| 14 | AMZN | AMAZON COM INC | $65.5M | 3.09% | 274,738 | Added |
| 15 | GEV | GE VERNOVA INC | $59.7M | 2.82% | 50,802 | Added |
| 16 | APH | AMPHENOL CORP | $54.4M | 2.57% | 308,716 | Added |
| 17 | JNJ | JOHNSON & JOHNSON | $47.9M | 2.26% | 188,640 | Added |
| 18 | RY | ROYAL BK CDA | $47.0M | 2.22% | 227,136 | Added |
| 19 | COST | COSTCO WHOLESALE CORPORATION | $44.4M | 2.10% | 47,497 | Added |
| 20 | BHP | BHP BILLITON LIMITED | $44.0M | 2.08% | 528,051 | Added |
| 21 | BCS | BARCLAYS PLC | $43.6M | 2.06% | 1.6M | Added |
| 22 | META | META PLATFORMS INC | $40.7M | 1.92% | 72,187 | Added |
| 23 | KEYS | KEYSIGHT TECHNOLOGIES INC | $40.3M | 1.90% | 115,108 | Added |
| 24 | CCJ | CAMECO CORP | $39.9M | 1.88% | 391,529 | Added |
| 25 | WMT | WALMART INC | $39.5M | 1.86% | 348,650 | Added |
Source: SEC Form 13F filings · as of 2026-06-30
Every position in this 13F-HR, with its change from the prior quarter.
13F holdings, latest quarter
SourceSEC EDGAR13F-HR