Main Street Research LLC
13F Reported Value
ⓘ$1.7B
Holdings
148
Latest Filing
2026-03-31
Filing Quarter
Q1 2026
Portfolio Overview
Main Street Research LLC disclosed 148 positions worth $1.7B in its Form 13F-HR for Q1 2026, led by $NVDA (NVIDIA CORP) at 6.3% of the equity portfolio, followed by $AAPL and $GOOG. During the quarter the fund opened 30 new positions and exited 10 — including a new stake in $GLW and a full exit from $IBN. The portfolio is most concentrated in Technology (42.1% of disclosed assets). All figures are sourced directly from Main Street Research LLC’s Form 13F-HR filing with the SEC under CIK 1513211.
AI Fund Analysis
Stable
$NVDA
$AAPL
$GOOG
$TSM
$JPM
$JNJ
$GEVSector Allocation
AUM History
Top Equity Holdings by Value
Quarterly Activity — Q1 2026
Click any card to unlockTop Holdings
- 90.2#1
Quality
$108.3M620,776 sh - 76.1#112
Quality
$102.4M403,578 sh - 80.2#45
Quality
$89.7M311,786 sh ISHARES TR
—Quality
$81.9M1,958,627 sh- $75.4M223,159 sh
SPDR SERIES TRUST
—Quality
$72.5M567,479 sh- 35.6
Quality
$65.8M223,762 sh - 86.4
Quality
$65.7M212,402 sh - 63.7
Quality
$58.6M67,774 sh - 74.6
Quality
$56.1M269,193 sh
| Company | Quality | Value | Shares |
|---|---|---|---|
| NVIDIA CORP$NVDA | 90.2#1 | $108.3M | 620,776 |
| Apple Inc.$AAPL | 76.1#112 | $102.4M | 403,578 |
| Alphabet Inc.$GOOG | 80.2#45 | $89.7M | 311,786 |
| ISHARES TR | — | $81.9M | 1,958,627 |
| TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD$TSM | — | $75.4M | 223,159 |
| SPDR SERIES TRUST | — | $72.5M | 567,479 |
| JPMORGAN CHASE & CO$JPM | 35.6 | $65.8M | 223,762 |
 Broadcom Inc.$AVGO | 86.4 | $65.7M | 212,402 |
 MCKESSON CORP$MCK | 63.7 | $58.6M | 67,774 |
 AMAZON COM INC$AMZN | 74.6 | $56.1M | 269,193 |
Unlock AI quality scores for every holding
32-signal composite ranking on each of Main Street Research LLC's 148 positions.
Showing top 10 of 148 holdings.
Sector Allocation
Technology
$723.7M
Other
$216.8M
Financials
$197.3M
Consumer Discretionary
$150.5M
Materials
$134.0M
Industrials
$109.9M
Healthcare
$93.5M
Consumer Staples
$82.0M
Full Holdings — Main Street Research LLC (Q1 2026)
All 148 disclosed positions from the latest Form 13F-HR, with quarter-over-quarter share changes and 13F Pro quality scores. Sourced from SEC EDGAR.
| # | Ticker | Company | Value | Weight | QoQ | Quality |
|---|---|---|---|---|---|---|
| 1 | $NVDA | NVIDIA CORP | $108.3M | 6.3% | +4% | 90.2 |
| 2 | $AAPL | Apple Inc. | $102.4M | 6.0% | +39% | 76.1 |
| 3 | $GOOG | Alphabet Inc. | $89.7M | 5.2% | +5% | 80.2 |
| 4 | — | ISHARES TR | $81.9M | 4.8% | +3% | — |
| 5 | $TSM | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | $75.4M | 4.4% | +2% | — |
| 6 | — | SPDR SERIES TRUST | $72.5M | 4.2% | +57% | — |
| 7 | $JPM | JPMORGAN CHASE & CO | $65.8M | 3.8% | +1% | 35.6 |
| 8 | $AVGO | Broadcom Inc. | $65.7M | 3.8% | +3% | 86.4 |
| 9 | $MCK | MCKESSON CORP | $58.6M | 3.4% | +1% | 63.7 |
| 10 | $AMZN | AMAZON COM INC | $56.1M | 3.3% | +4% | 74.6 |
| 11 |  $ASML | ASML HOLDING NV | $55.1M | 3.2% | +4% | — |
| 12 |  $GLW | CORNING INC /NY | $52.7M | 3.1% | NEW | 72.7 |
| 13 |  $COST | COSTCO WHOLESALE CORP /NEW | $46.0M | 2.7% | -26% | 67 |
| 14 | $JNJ | JOHNSON & JOHNSON | $45.7M | 2.7% | +4% | 72.8 |
| 15 | — | ISHARES INC | $44.5M | 2.6% | +2% | — |
| 16 | $GEV | GE Vernova Inc. | $44.2M | 2.6% | +3% | 70.1 |
| 17 |  $GLDM | World Gold Trust | $43.5M | 2.5% | +2% | — |
| 18 |  $CAT | CATERPILLAR INC | $43.3M | 2.5% | +3% | 67.8 |
| 19 |  $WMT | Walmart Inc. | $42.9M | 2.5% | +2% | 63.2 |
| 20 |  $CCJ | CAMECO CORP | $42.3M | 2.5% | +2% | — |
| 21 |  $META | Meta Platforms, Inc. | $40.6M | 2.4% | -18% | 80.9 |
| 22 |  $APH | AMPHENOL CORP /DE/ | $38.0M | 2.2% | +2% | 80.5 |
| 23 |  $BHP | BHP Group Ltd | $37.8M | 2.2% | NEW | — |
| 24 |  $AZN | ASTRAZENECA PLC | $37.6M | 2.2% | -49% | — |
| 25 |  $MU | MICRON TECHNOLOGY INC | $36.9M | 2.1% | +1950% | 88.4 |
| 26 |  $RY | ROYAL BANK OF CANADA | $36.0M | 2.1% | NEW | — |
| 27 |  $KEYS | Keysight Technologies, Inc. | $31.9M | 1.9% | NEW | 72.3 |
| 28 |  $MSFT | MICROSOFT CORP | $25.0M | 1.4% | -60% | 83.7 |
| 29 |  $PLTR | Palantir Technologies Inc. | $24.5M | 1.4% | -62% | 85.8 |
| 30 |  $PG | PROCTER & GAMBLE Co | $21.9M | 1.3% | +0% | 72.9 |
| 31 |  $BCS | BARCLAYS PLC | $18.0M | 1.1% | -49% | — |
| 32 |  $FICO | FAIR ISAAC CORP | $9.0M | 0.5% | +240% | 75.6 |
| 33 |  $IBIT | iShares Bitcoin Trust ETF | $7.5M | 0.4% | +9% | — |
| 34 |  $GOOGL | Alphabet Inc. | $6.7M | 0.4% | +17% | 80.2 |
| 35 |  $BRK.B | BERKSHIRE HATHAWAY INC | $5.7M | 0.3% | -1% | 64.5 |
| 36 |  $PANW | Palo Alto Networks Inc | $5.5M | 0.3% | +157% | 66.5 |
| 37 |  $MCD | MCDONALDS CORP | $4.8M | 0.3% | -17% | 73.9 |
| 38 |  $TSLA | Tesla, Inc. | $4.6M | 0.3% | -3% | 50.1 |
| 39 |  $SCHW | SCHWAB CHARLES CORP | $4.4M | 0.3% | +46% | 77.2 |
| 40 |  $ANET | Arista Networks, Inc. | $4.3M | 0.3% | NEW | 86 |
| 41 |  $XOM | EXXON MOBIL CORP | $4.1M | 0.2% | +3% | 61.8 |
| 42 |  $WFC | WELLS FARGO & COMPANY/MN | $3.7M | 0.2% | +136% | — |
| 43 |  $BRK.A | BERKSHIRE HATHAWAY INC | $3.6M | 0.2% | +0% | 64.5 |
| 44 |  $CVX | CHEVRON CORP | $3.5M | 0.2% | +77% | 54.7 |
| 45 |  $ADSK | Autodesk, Inc. | $3.4M | 0.2% | +1% | 76.4 |
| 46 | — | ISHARES TR | $3.3M | 0.2% | +22% | — |
| 47 |  $V | VISA INC. | $3.1M | 0.2% | -94% | 83.5 |
| 48 |  $LLY | ELI LILLY & Co | $2.7M | 0.2% | +105% | 89.3 |
| 49 | — | ISHARES INC | $2.7M | 0.1% | -3% | — |
| 50 |  $ABBV | AbbVie Inc. | $2.2M | 0.1% | +10% | 59.3 |
| 51 |  $SPY | SPDR S&P 500 ETF TRUST | $2.1M | 0.1% | +23% | — |
| 52 | — | ISHARES TR | $1.7M | 0.1% | +103% | — |
| 53 |  $CRM | Salesforce, Inc. | $1.3M | 0.1% | +9% | 75.2 |
| 54 |  $RTX | RTX Corp | $1.2M | 0.1% | +10% | 70 |
| 55 | — | ISHARES TR | $1.2M | 0.1% | +6% | — |
| 56 |  $MRK | Merck & Co., Inc. | $1.1M | 0.1% | +22% | 70.9 |
| 57 |  $MMM | 3M CO | $1.1M | 0.1% | -2% | 60.7 |
| 58 |  $DIS | Walt Disney Co | $1.0M | 0.1% | NEW | 68.9 |
| 59 |  $QQQ | INVESCO QQQ TRUST, SERIES 1 | $1.0M | 0.1% | +32% | — |
| 60 | — | SCHWAB STRATEGIC TR | $1.0M | 0.1% | +15% | — |
| 61 |  $UNP | UNION PACIFIC CORP | $1.0M | 0.1% | +76% | 74 |
| 62 |  $CLX | CLOROX CO /DE/ | $988,319 | 0.1% | +5% | 63.5 |
| 63 | — | ISHARES TR | $930,612 | 0.1% | +18% | — |
| 64 |  $PHM | PULTEGROUP INC/MI/ | $868,197 | 0.1% | NEW | 65.1 |
| 65 |  $CRUS | CIRRUS LOGIC, INC. | $829,251 | 0.1% | NEW | 75.3 |
| 66 |  $UBER | Uber Technologies, Inc | $826,548 | 0.1% | -97% | 79.3 |
| 67 | — | VANGUARD INDEX FDS | $796,195 | 0.1% | +160% | — |
| 68 |  $CSCO | CISCO SYSTEMS, INC. | $780,287 | 0.1% | +4% | 72.3 |
| 69 |  $GLD | SPDR GOLD TRUST | $777,104 | 0.1% | +162% | — |
| 70 |  $GS | GOLDMAN SACHS GROUP INC | $739,395 | 0.0% | NEW | — |
| 71 | — | STATE STR SPDR DOW JONES IND | $695,606 | 0.0% | +135% | — |
| 72 |  $CW | CURTISS WRIGHT CORP | $689,293 | 0.0% | +10% | 70.7 |
| 73 |  $TXN | TEXAS INSTRUMENTS INC | $684,748 | 0.0% | +91% | 70.4 |
| 74 |  $ON | ON SEMICONDUCTOR CORP | $640,872 | 0.0% | NEW | 42.4 |
| 75 |  $AMD | ADVANCED MICRO DEVICES INC | $639,787 | 0.0% | -8% | 78.8 |
| 76 |  $HSBC | HSBC HOLDINGS PLC | $637,895 | 0.0% | +0% | — |
| 77 |  $CL | COLGATE PALMOLIVE CO | $637,861 | 0.0% | +13% | 72.4 |
| 78 |  $C | CITIGROUP INC | $626,704 | 0.0% | +17% | 54.8 |
| 79 |  $BX | Blackstone Inc. | $611,402 | 0.0% | NEW | 68 |
| 80 |  $T | AT&T INC. | $585,395 | 0.0% | +45% | 71.9 |
| 81 |  $BAC | BANK OF AMERICA CORP /DE/ | $582,221 | 0.0% | +7% | 68.4 |
| 82 |  $SYK | STRYKER CORP | $579,427 | 0.0% | -4% | 69.8 |
| 83 |  $PEP | PEPSICO INC | $578,011 | 0.0% | +76% | 62.7 |
| 84 |  $DHI | HORTON D R INC /DE/ | $522,534 | 0.0% | NEW | 54.6 |
| 85 |  $MUFG | MITSUBISHI UFJ FINANCIAL GROUP INC | $516,703 | 0.0% | +1% | — |
| 86 |  $ORCL | ORACLE CORP | $514,435 | 0.0% | +15% | 67.2 |
| 87 |  $ADI | ANALOG DEVICES INC | $474,347 | 0.0% | +19% | 76.2 |
| 88 |  $NTES | NetEase, Inc. | $457,275 | 0.0% | +2% | — |
| 89 |  $ADP | AUTOMATIC DATA PROCESSING INC | $453,498 | 0.0% | -3% | 77.9 |
| 90 |  $TMO | THERMO FISHER SCIENTIFIC INC. | $442,377 | 0.0% | -22% | 63.7 |
| 91 |  $LRCX | LAM RESEARCH CORP | $424,784 | 0.0% | +30% | 82.4 |
| 92 |  $BMY | BRISTOL MYERS SQUIBB CO | $421,015 | 0.0% | -53% | 70.1 |
| 93 | — | VANGUARD INDEX FDS | $413,524 | 0.0% | -16% | — |
| 94 |  $XYL | Xylem Inc. | $396,621 | 0.0% | +0% | 65.6 |
| 95 |  $ABT | ABBOTT LABORATORIES | $396,237 | 0.0% | +6% | 67 |
| 96 |  $TT | Trane Technologies plc | $394,653 | 0.0% | +0% | — |
| 97 |  $CCZ | COMCAST CORP | $388,159 | 0.0% | +24% | 70.4 |
| 98 |  $ISRG | INTUITIVE SURGICAL INC | $386,771 | 0.0% | +65% | 81.4 |
| 99 |  $EBAY | EBAY INC | $380,009 | 0.0% | +27% | 69.3 |
| 100 |  $BSX | BOSTON SCIENTIFIC CORP | $376,061 | 0.0% | -0% | 79.9 |
| 101 | — | SELECT SECTOR SPDR TR | $372,120 | 0.0% | NEW | — |
| 102 |  $PTC | PTC INC. | $353,518 | 0.0% | NEW | 69.8 |
| 103 |  $LEN | LENNAR CORP /NEW/ | $339,023 | 0.0% | NEW | 49.2 |
| 104 |  $DAL | DELTA AIR LINES, INC. | $338,450 | 0.0% | +7% | 64.4 |
| 105 |  $IT | GARTNER INC | $334,889 | 0.0% | NEW | 65.2 |
| 106 |  $ACN | Accenture plc | $333,722 | 0.0% | -18% | — |
| 107 |  $FTNT | Fortinet, Inc. | $333,009 | 0.0% | NEW | 78.1 |
| 108 |  $INTU | INTUIT INC. | $308,039 | 0.0% | -9% | 82 |
| 109 |  $TJX | TJX COMPANIES INC /DE/ | $306,464 | 0.0% | +23% | 70.7 |
| 110 | — | ISHARES TR | $296,348 | 0.0% | -9% | — |
| 111 |  $SHOP | SHOPIFY INC. | $288,958 | 0.0% | +19% | — |
| 112 |  $LNG | Cheniere Energy, Inc. | $286,598 | 0.0% | NEW | 48.4 |
| 113 |  $SJM | J M SMUCKER Co | $275,626 | 0.0% | -14% | 46.4 |
| 114 |  $EXPE | Expedia Group, Inc. | $274,297 | 0.0% | +25% | 65.7 |
| 115 | — | SCHWAB STRATEGIC TR | $272,677 | 0.0% | +8% | — |
| 116 |  $COIN | Coinbase Global, Inc. | $270,646 | 0.0% | -0% | 68 |
| 117 |  $INTC | INTEL CORP | $261,205 | 0.0% | -14% | 41.5 |
| 118 |  $KLAC | KLA CORP | $260,617 | 0.0% | -21% | 84.4 |
| 119 |  $COP | CONOCOPHILLIPS | $257,400 | 0.0% | NEW | 74.8 |
| 120 |  $NFLX | NETFLIX INC | $257,009 | 0.0% | -75% | 86.7 |
| 121 | — | ISHARES TR | $253,524 | 0.0% | +0% | — |
| 122 | — | SCHWAB STRATEGIC TR | $252,599 | 0.0% | +6% | — |
| 123 |  $NSC | NORFOLK SOUTHERN CORP | $251,699 | 0.0% | -21% | 70.8 |
| 124 |  $IDXX | IDEXX LABORATORIES INC /DE | $251,165 | 0.0% | NEW | 73.6 |
| 125 |  $MA | Mastercard Inc | $246,332 | 0.0% | +0% | 81.7 |
| 126 |  $CRWD | CrowdStrike Holdings, Inc. | $245,177 | 0.0% | NEW | 55 |
| 127 |  $ADBE | ADOBE INC. | $244,295 | 0.0% | +30% | 80.4 |
| 128 | — | SCHWAB STRATEGIC TR | $237,857 | 0.0% | -14% | — |
| 129 |  $AXP | AMERICAN EXPRESS CO | $233,817 | 0.0% | -5% | 73.2 |
| 130 |  $PH | Parker-Hannifin Corp | $233,658 | 0.0% | -11% | 73.8 |
| 131 | — | ISHARES TR | $229,119 | 0.0% | +0% | — |
| 132 | — | ISHARES TR | $228,961 | 0.0% | +0% | — |
| 133 |  $HOOD | Robinhood Markets, Inc. | $227,997 | 0.0% | -99% | 75.8 |
| 134 |  $HD | HOME DEPOT, INC. | $225,692 | 0.0% | -29% | 69.2 |
| 135 |  $TMUS | T-Mobile US, Inc. | $224,732 | 0.0% | -51% | 72.7 |
| 136 |  $ENTG | ENTEGRIS INC | $217,128 | 0.0% | NEW | 57.7 |
| 137 |  $MTCH | Match Group, Inc. | $215,308 | 0.0% | NEW | 66.4 |
| 138 |  $COF | CAPITAL ONE FINANCIAL CORP | $215,267 | 0.0% | +14% | 71 |
| 139 |  $NEE | NEXTERA ENERGY INC | $210,466 | 0.0% | -19% | 71.7 |
| 140 |  $CI | Cigna Group | $205,664 | 0.0% | NEW | 66.8 |
| 141 |  $TDY | TELEDYNE TECHNOLOGIES INC | $204,493 | 0.0% | NEW | 70.2 |
| 142 |  $PHG | KONINKLIJKE PHILIPS NV | $203,308 | 0.0% | NEW | — |
| 143 |  $VRT | Vertiv Holdings Co | $202,970 | 0.0% | NEW | 82.7 |
| 144 |  $COHR | COHERENT CORP. | $201,526 | 0.0% | NEW | 64 |
| 145 |  $PACB | PACIFIC BIOSCIENCES OF CALIFORNIA, INC. | $200,772 | 0.0% | NEW | 10.8 |
| 146 |  $AON | Aon plc | $200,769 | 0.0% | -24% | — |
| 147 |  $OMDA | Omada Health, Inc. | $199,976 | 0.0% | +0% | 45.5 |
| 148 |  $TMC | TMC the metals Co Inc. | $46,700 | 0.0% | NEW | — |
New Positions (30)
$GLW CORNING INC /NY$52.7M$BHP BHP Group Ltd$37.8M$RY ROYAL BANK OF CANADA$36.0M$KEYS Keysight Technologies, Inc.$31.9M$ANET Arista Networks, Inc.$4.3M$DIS Walt Disney Co$1.0M$PHM PULTEGROUP INC/MI/$868,197$CRUS CIRRUS LOGIC, INC.$829,251$GS GOLDMAN SACHS GROUP INC$739,395$ON ON SEMICONDUCTOR CORP$640,872$BX Blackstone Inc.$611,402$DHI HORTON D R INC /DE/$522,534$PTC PTC INC.$353,518$LEN LENNAR CORP /NEW/$339,023
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