Main Street Research LLC Portfolio Holdings
Q3 2025•129 long positions•$1.9B portfolio value
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Holding135 | Sector | Position↕ | Traded↕ | Ownership↕ | Shares Δ↕ | Shares Δ % | Market Cap↕ | Owned Since↕ |
|---|---|---|---|---|---|---|---|---|
Semiconductors Technology | $112.2M 6.06% | +$1.2M Bought | 0.002% 601.6K shares | 595.2K → 601.6K +$1.2M | +1.07% | $4.54T Mega Cap | Q4 2019 Held for 5y 11m | |
Consumer Electronics Technology | $89.5M 4.83% | +$14.5M Bought | 0.002% 351.3K shares | 294.4K → 351.3K +$14.5M | +19.33% | $3.78T Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Software - Infrastructure Technology | $87.1M 4.71% | +$38.0M Bought | 0.002% 168.2K shares | 94.7K → 168.2K +$38.0M | +77.57% | $3.85T Mega Cap | Q4 2014 Held for 10y 11m | |
Software - Infrastructure Technology | $83.1M 4.49% | -$1.1M Sold | 0.019% 455.5K shares | 461.4K → 455.5K −$1.1M | -1.29% | $432.76B Mega Cap | Q3 2024 Held for 1y 2m | |
Software - Infrastructure Technology | $77.2M 4.17% | +$367.8K Bought | 0.061% 539.3K shares | 536.7K → 539.3K +$367.8K | +0.48% | $127.24B Large Cap | Q2 2025 Held for 5 months | |
Internet Content & Information Communication Services | $72.9M 3.94% | +$607.5K Bought | 0.002% 299.8K shares | 297.3K → 299.8K +$607.5K | +0.84% | $2.95T Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Banks - Diversified Financial Services | $70.9M 3.83% | +$137.8K Bought | 0.008% 224.7K shares | 224.3K → 224.7K +$137.8K | +0.19% | $867.35B Mega Cap | Q2 2023 Held for 2y 5m | |
Semiconductors Technology | $68.8M 3.72% | +$7.9M Bought | 0.004% 208.4K shares | 184.6K → 208.4K +$7.9M | +12.89% | $1.56T Mega Cap | Q2 2020 Held for 5y 5m | |
Internet Content & Information Communication Services | $65.5M 3.54% | +$18.8M Bought | 0.004% 89.2K shares | 63.6K → 89.2K +$18.8M | +40.12% | $1.84T Mega Cap | Q3 2020 Held for 5y 2m | |
Semiconductors Technology | $61.7M 3.33% | +$23.4M Bought | — 220.9K shares | 137.0K → 220.9K +$23.4M | +61.25% | — — | Q2 2024 Held for 1y 5m | |
ETF ETF | $61.5M 3.32% | +$61.5M New | — 1.5M shares | 0 → 1.5M +$61.5M | New | — — | Q3 2025 Held for 2 months | |
Financial - Credit Services Financial Services | $60.5M 3.27% | +$1.6M Bought | 0.009% 177.1K shares | 172.4K → 177.1K +$1.6M | +2.71% | $662.60B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Discount Stores Consumer Defensive | $58.7M 3.17% | +$564.6K Bought | 0.014% 63.5K shares | 62.8K → 63.5K +$564.6K | +0.97% | $410.27B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Specialty Retail Consumer Cyclical | $57.7M 3.12% | +$8.5M Bought | 0.002% 262.9K shares | 224.2K → 262.9K +$8.5M | +17.3% | $2.34T Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Medical - Distribution Healthcare | $53.2M 2.88% | -$220.9K Sold | 0.055% 68.9K shares | 69.2K → 68.9K −$220.9K | -0.41% | $96.1B Large Cap | Q1 2022 Held for 3y 8m | |
Entertainment Communication Services | $51.5M 2.78% | +$398.0K Bought | 0.01% 42.9K shares | 42.6K → 42.9K +$398.0K | +0.78% | $509.45B Mega Cap | Q3 2024 Held for 1y 2m | |
Software - Application Technology | $44.4M 2.4% | +$341.4K Bought | 0.022% 452.8K shares | 449.3K → 452.8K +$341.4K | +0.78% | $204.31B Mega Cap | Q2 2025 Held for 5 months | |
Telecommunications Services Communication Services | $43.2M 2.33% | +$159.7K Bought | 0.016% 180.3K shares | 179.7K → 180.3K +$159.7K | +0.37% | $269.40B Mega Cap | Q3 2022 Held for 3y 2m | |
Unknown Unknown | $39.1M 2.11% | +$22.2M Bought | — 40.4K shares | 17.5K → 40.4K +$22.2M | +131.09% | — — | Q4 2022 Held for 2y 11m | |
Specialty Retail Consumer Cyclical | $37.0M 2.0% | +$245.4K Bought | 0.031% 15.8K shares | 15.7K → 15.8K +$245.4K | +0.67% | $118.48B Large Cap | Q3 2024 Held for 1y 2m | |
Hardware, Equipment & Parts Technology | $36.8M 1.99% | +$36.8M New | 0.024% 297.3K shares | 0 → 297.3K +$36.8M | New | $151.09B Large Cap | Q3 2025 Held for 2 months | |
Unknown Unknown | $35.7M 1.93% | +$1.4M Bought | — 466.9K shares | 448.5K → 466.9K +$1.4M | +4.1% | — — | Q2 2025 Held for 5 months | |
Internet Content & Information Communication Services | $35.2M 1.9% | +$420.9K Bought | 0.025% 50.4K shares | 49.8K → 50.4K +$420.9K | +1.21% | $143.63B Large Cap | Q2 2025 Held for 5 months | |
Discount Stores Consumer Defensive | $35.1M 1.9% | +$529.6K Bought | 0.004% 340.9K shares | 335.7K → 340.9K +$529.6K | +1.53% | $821.68B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Unknown Unknown | $35.0M 1.89% | +$35.0M New | — 1.7M shares | 0 → 1.7M +$35.0M | New | — — | Q3 2025 Held for 2 months | |
Chemicals - Specialty Basic Materials | $34.8M 1.88% | +$422.8K Bought | 0.016% 73.4K shares | 72.5K → 73.4K +$422.8K | +1.23% | $222.73B Mega Cap | Q3 2023 Held for 2y 2m | |
Travel Services Consumer Cyclical | $33.3M 1.8% | +$8.1M Bought | 0.019% 6.2K shares | 4.7K → 6.2K +$8.1M | +31.94% | $174.99B Large Cap | Q1 2023 Held for 2y 8m | |
Construction Industrials | $33.2M 1.79% | +$954.1K Bought | 0.035% 78.6K shares | 76.3K → 78.6K +$954.1K | +2.96% | $93.9B Large Cap | Q2 2025 Held for 5 months | |
Unknown Unknown | $31.8M 1.72% | +$359.3K Bought | — 1.1M shares | 1.0M → 1.1M +$359.3K | +1.14% | — — | Q1 2024 Held for 1y 8m | |
Uranium Energy | $30.6M 1.65% | +$30.6M New | 0.084% 364.4K shares | 0 → 364.4K +$30.6M | New | $36.5B Large Cap | Q3 2025 Held for 2 months | |
Renewable Utilities Utilities | $29.9M 1.62% | +$12.9M Bought | 0.018% 48.6K shares | 27.6K → 48.6K +$12.9M | +76.21% | $167.39B Large Cap | Q1 2025 Held for 8 months | |
Asset Management - Global Financial Services | $28.9M 1.56% | +$28.9M Bought | 0.038% 217.1K shares | — | — | $76.2B Large Cap | Q3 2025 Held for 2 months | |
Household & Personal Products Consumer Defensive | $23.5M 1.27% | -$39.1M Sold | 0.007% 152.7K shares | 406.9K → 152.7K −$39.1M | -62.46% | $359.62B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Software - Application Technology | $12.9M 0.698% | -$3.1M Sold | 0.036% 8.6K shares | 10.7K → 8.6K −$3.1M | -19.55% | $35.9B Large Cap | Q3 2013 Held for 12y 2m | |
ETF ETF | $12.4M 0.67% | +$12.4M Bought | — 190.8K shares | — | — | — — | Q1 2025 Held for 8 months | |
Software - Infrastructure Technology | $7.0M 0.379% | +$4.3M Bought | 0.005% 34.5K shares | 13.1K → 34.5K +$4.3M | +162.07% | $137.82B Large Cap | Q3 2022 Held for 3y 2m | |
Insurance - Diversified Financial Services | $6.7M 0.36% | -$51.7M Sold | 0.001% 13.3K shares | 116.2K → 13.3K −$51.7M | -88.59% | $1.08T Mega Cap | Q4 2019 Held for 5y 11m | |
Auto - Manufacturers Consumer Cyclical | $5.8M 0.313% | +$542.6K Bought | 0.0% 13.0K shares | 11.8K → 13.0K +$542.6K | +10.34% | $1.48T Mega Cap | Q4 2019 Held for 5y 11m | |
Restaurants Consumer Cyclical | $5.8M 0.311% | -$1.5K Sold | 0.003% 19.0K shares | 19.0K → 19.0K −$1.5K | -0.03% | $216.86B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Computer Hardware Technology | $5.1M 0.275% | +$5.1M Bought | 0.003% 34.9K shares | — | — | $183.14B Large Cap | Q3 2025 Held for 2 months | |
Internet Content & Information Communication Services | $4.8M 0.259% | -$111.8K Sold | 0.0% 19.7K shares | 20.1K → 19.7K −$111.8K | -2.28% | $2.95T Mega Cap | Q2 2014 Held for 11y 5m | |
Software - Application Technology | $4.5M 0.242% | -$184.2K Sold | 0.007% 14.1K shares | 14.7K → 14.1K −$184.2K | -3.96% | $67.7B Large Cap | Q2 2014 Held for 11y 5m | |
Insurance - Diversified Financial Services | $3.8M 0.204% | — | 0.0% 5.0 shares | — | — | $1.08T Mega Cap | Q3 2020 Held for 5y 2m | |
Financial - Capital Markets Financial Services | $3.3M 0.176% | +$45.9K Bought | 0.002% 34.1K shares | 33.6K → 34.1K +$45.9K | +1.43% | $173.30B Large Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Banks - Diversified Financial Services | $3.1M 0.168% | +$1.6M Bought | 0.001% 37.1K shares | 18.4K → 37.1K +$1.6M | +101.75% | $268.51B Mega Cap | Q2 2017 Held for 8y 5m | |
ETF ETF | $3.0M 0.164% | -$357.1K Sold | — 16.7K shares | 18.7K → 16.7K −$357.1K | -10.53% | — — | Q2 2023 Held for 2y 5m | |
ETF ETF | $2.7M 0.148% | +$636.1K Bought | — 33.2K shares | 25.5K → 33.2K +$636.1K | +30.23% | — — | Q2 2025 Held for 5 months | |
Oil & Gas Integrated Energy | $2.7M 0.148% | +$252.7K Bought | 0.001% 24.2K shares | 22.0K → 24.2K +$252.7K | +10.19% | $480.68B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Oil & Gas Integrated Energy | $2.6M 0.141% | +$1.1M Bought | 0.001% 16.8K shares | 9.5K → 16.8K +$1.1M | +76.22% | $312.88B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ | |
Drug Manufacturers - General Healthcare | $2.2M 0.119% | +$96.1K Bought | 0.001% 9.5K shares | 9.1K → 9.5K +$96.1K | +4.56% | $409.03B Mega Cap | ≤ Q2 2013 Held for 12y 5m+ |
