Institutional Fund
Main Street Research LLC
Sausalito, CACIK 15132115 filings on record
Portfolio Value
$1.72B
Q1 2026
Holdings
148
Reported positions
New Buys
31
Opened this quarter
QoQ Change
-1.7%
from $1.75B
Portfolio Value Trend
Reported 13F value by quarter
Portfolio value trend — upgrade to see history
UpgradeTop Allocations
Largest positions by weight
- Nvidia Corporation6.3%
- Apple Inc6.0%
- Alphabet Inc5.2%
- Ishares Tr4.8%
- Taiwan Semiconductor Mfg Ltd4.4%
- Spdr Series Trust4.2%
- Other69.2%
Portfolio Holdings
148 positions · Q1 2026
| # | Security | Shares | Value | % Port. | Δ Shares | Activity |
|---|---|---|---|---|---|---|
| 1 | Nvidia Corporation | 620.8K | $108.26M | 6.3% | +24.9K | Added |
| 2 | Apple Inc | 403.6K | $102.42M | 6.0% | +112.6K | Added |
| 3 | Alphabet Inc | 311.8K | $89.66M | 5.2% | +14.2K | Added |
| 4 | Ishares Tr | 1.96M | $81.85M | 4.8% | +50.8K | Added |
| 5 | Taiwan Semiconductor Mfg Ltd | 223.2K | $75.42M | 4.4% | +5.0K | Added |
| 6 | Spdr Series Trust | 567.5K | $72.48M | 4.2% | +207.0K | Added |
| 7 | Jpmorgan Chase & Co. | 223.8K | $65.82M | 3.8% | +1.8K | Added |
| 8 | Broadcom Inc | 212.4K | $65.74M | 3.8% | +7.0K | Added |
| 9 | Mckesson Corp | 67.8K | $58.65M | 3.4% | +413 | Added |
| 10 | Amazon Com Inc | 269.2K | $56.06M | 3.3% | +9.3K | Added |
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