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Main Street Research LLC
hedge fundUpdated 43 days agoManaged by Main Street Research Llc • Latest filing Q2 2026
Portfolio value
$2.1B
Q2 2026
Filings
14
Quarterly 13F history
Top-10 concentration
100.0%
Weight of largest holdings
Annualized return
55.3%
Implied from 13F holdings
Portfolio value history
13F-disclosed portfolio value over 14 quarters
Show data table
| Period | Portfolio value |
|---|---|
| Q1 2023 | $506.4M |
| Q2 2023 | $627.4M |
| Q3 2023 | $970.6M |
| Q4 2023 | $1.2B |
| Q1 2024 | $1.5B |
| Q2 2024 | $1.5B |
| Q3 2024 | $1.6B |
| Q4 2024 | $1.6B |
| Q1 2025 | $1.5B |
| Q2 2025 | $1.6B |
| Q3 2025 | $1.9B |
| Q4 2025 | $1.7B |
| Q1 2026 | $1.7B |
| Q2 2026 | $2.1B |
Top holdings
140 positions as of Q2 2026
| # | Stock | Value | Shares | % Portfolio | Change |
|---|---|---|---|---|---|
| 1 | N NVDA NVIDIA CORPORATION | $126.1M | 630.1K | 5.95% | Added(+1.5%) |
| 2 | M MU MICRON TECHNOLOGY INC | $125.4M | 108.6K | 5.92% | Trimmed(-0.4%) |
| 3 | A AAPL APPLE INC | $117.5M | 406.1K | 5.55% | Added(+0.6%) |
| 4 | G GOOGN ALPHABET INC | $113.3M | 316.9K | 5.35% | Added(+1.7%) |
| 5 | T TSMWF TAIWAN SEMICONDUCTOR MANUFAC | $109.1M | 228.4K | 5.15% | Added(+2.4%) |
| 6 | G GLW CORNING INC | $100.7M | 394.1K | 4.75% | Added(+1.6%) |
| 7 | S STT-PG SPDR SERIES TRUST | $91.3M | 576.8K | 4.31% | Added(+1.6%) |
| 8 | E ETHA ISHARES TR | $87.8M | 2.03M | 4.14% | Added(+3.5%) |
| 9 | A ASMLF ASML HLDG NV | $84.3M | 42.4K | 3.98% | Added(+1.7%) |
| 10 | A AVGO BROADCOM INC | $80.8M | 213.8K | 3.81% | Added(+0.7%) |
| 11 | J JPM-PM JPMORGAN CHASE & CO | $74.1M | 226.3K | 3.50% | Added(+1.1%) |
| 12 | E ETHA ISHARES INC | $72.9M | 360.9K | 3.44% | Trimmed(-0.3%) |
| 13 | C CAT CATERPILLAR INC | $65.8M | 61.8K | 3.10% | Added(+1.1%) |
| 14 | A AMZN AMAZON COM INC | $65.5M | 274.7K | 3.09% | Added(+2.1%) |
| 15 | G GEV GE VERNOVA INC | $59.7M | 50.8K | 2.82% | Added(+0.2%) |
| 16 | A APH AMPHENOL CORP | $54.4M | 308.7K | 2.57% | Added(+2.5%) |
| 17 | J JNJ JOHNSON & JOHNSON | $47.9M | 188.6K | 2.26% | Added(+0.9%) |
| 18 | R RYLBF ROYAL BK CDA | $47M | 227.1K | 2.22% | Added(+2.0%) |
| 19 | C COST COSTCO WHOLESALE CORPORATION | $44.4M | 47.5K | 2.10% | Added(+2.9%) |
| 20 | B BHPLF BHP BILLITON LIMITED | $44M | 528.1K | 2.08% | Added(+1.7%) |