Main Street Research LLC
13F Reported Value
ⓘ$2.1B
Holdings
140
Latest Filing
2026-06-30
Filing Quarter
Q2 2026
Portfolio Overview
Main Street Research LLC disclosed 140 positions worth $2.1B in its Form 13F-HR for Q2 2026, led by $NVDA (NVIDIA CORP) at 6.0% of the equity portfolio, followed by $MU and $AAPL. During the quarter the fund opened 13 new positions and exited 21 — including a new stake in $ROST and a full exit from $GLDM. The portfolio is most concentrated in Technology (44.7% 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
Concentrating
$NVDA
$MU
$AAPL
$GOOG
$TSM
$CAT
$GEVSector Allocation
AUM History
Top Equity Holdings by Value
Quarterly Activity — Q2 2026
Click any card to unlockTop Holdings
- 85.9#5
Quality
$126.1M630,053 sh - 86.2#4
Quality
$125.4M108,636 sh - 76.4#84
Quality
$117.5M406,129 sh - 78.2
Quality
$113.3M316,947 sh - $109.1M228,429 sh
- 73.7
Quality
$100.7M394,058 sh SPDR SERIES TRUST - ST STR SP BIOT
—Quality
$91.3M576,754 shISHARES TR - INTERNATIONAL SL
—Quality
$87.8M2,027,356 sh- —
Quality
$84.3M42,396 sh - 84.5
Quality
$80.8M213,841 sh
| Company | Quality | Value | Shares |
|---|---|---|---|
| NVIDIA CORP$NVDA | 85.9#5 | $126.1M | 630,053 |
| MICRON TECHNOLOGY INC$MU | 86.2#4 | $125.4M | 108,636 |
| Apple Inc.$AAPL | 76.4#84 | $117.5M | 406,129 |
| Alphabet Inc.$GOOG | 78.2 | $113.3M | 316,947 |
| TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD$TSM | — | $109.1M | 228,429 |
 CORNING INC /NY$GLW | 73.7 | $100.7M | 394,058 |
| SPDR SERIES TRUST - ST STR SP BIOT | — | $91.3M | 576,754 |
| ISHARES TR - INTERNATIONAL SL | — | $87.8M | 2,027,356 |
 ASML HOLDING NV$ASML | — | $84.3M | 42,396 |
 Broadcom Inc.$AVGO | 84.5 | $80.8M | 213,841 |
Unlock AI quality scores for every holding
32-signal composite ranking on each of Main Street Research LLC's 140 positions.
Showing top 10 of 140 holdings.
Sector Allocation
Technology
$946.1M
Other
$272.4M
Financials
$191.1M
Materials
$185.8M
Consumer Discretionary
$184.6M
Industrials
$163.3M
Healthcare
$95.5M
Consumer Staples
$45.8M
Full Holdings — Main Street Research LLC (Q2 2026)
All 140 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 | $126.1M | 6.0% | +1% | 85.9 |
| 2 | $MU | MICRON TECHNOLOGY INC | $125.4M | 5.9% | -0% | 86.2 |
| 3 | $AAPL | Apple Inc. | $117.5M | 5.5% | +1% | 76.4 |
| 4 | $GOOG | Alphabet Inc. | $113.3M | 5.3% | +2% | 78.2 |
| 5 | $TSM | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | $109.1M | 5.2% | +2% | — |
| 6 | $GLW | CORNING INC /NY | $100.7M | 4.8% | +2% | 73.7 |
| 7 | — | SPDR SERIES TRUST - ST STR SP BIOT | $91.3M | 4.3% | +2% | — |
| 8 | — | ISHARES TR - INTERNATIONAL SL | $87.8M | 4.1% | +4% | — |
| 9 | $ASML | ASML HOLDING NV | $84.3M | 4.0% | +2% | — |
| 10 | $AVGO | Broadcom Inc. | $80.8M | 3.8% | +1% | 84.5 |
| 11 |  $JPM | JPMORGAN CHASE & CO | $74.1M | 3.5% | +1% | 70.7 |
| 12 | — | ISHARES INC - MSCI STH KOR ETF | $72.9M | 3.4% | -0% | — |
| 13 | $CAT | CATERPILLAR INC | $65.8M | 3.1% | +1% | 66.5 |
| 14 |  $AMZN | AMAZON COM INC | $65.5M | 3.1% | +2% | 68.7 |
| 15 | $GEV | GE Vernova Inc. | $59.7M | 2.8% | +0% | 81.1 |
| 16 |  $APH | AMPHENOL CORP /DE/ | $54.4M | 2.6% | +3% | 79.3 |
| 17 |  $JNJ | JOHNSON & JOHNSON | $47.9M | 2.3% | +1% | 69 |
| 18 |  $RY | ROYAL BANK OF CANADA | $47.0M | 2.2% | +2% | 74.8 |
| 19 |  $COST | COSTCO WHOLESALE CORP /NEW | $44.4M | 2.1% | +3% | 66.2 |
| 20 |  $BHP | BHP Group Ltd | $44.0M | 2.1% | +2% | — |
| 21 |  $BCS | BARCLAYS PLC | $43.6M | 2.1% | +91% | — |
| 22 |  $META | Meta Platforms, Inc. | $40.7M | 1.9% | +2% | 79.6 |
| 23 |  $KEYS | Keysight Technologies, Inc. | $40.3M | 1.9% | +2% | 71.4 |
| 24 |  $CCJ | CAMECO CORP | $39.9M | 1.9% | +1% | — |
| 25 |  $WMT | Walmart Inc. | $39.5M | 1.9% | +1% | 60.2 |
| 26 |  $AZN | ASTRAZENECA PLC | $37.4M | 1.8% | +4% | — |
| 27 |  $ROST | ROSS STORES, INC. | $32.1M | 1.5% | NEW | 70.4 |
| 28 |  $FTI | TechnipFMC plc | $27.4M | 1.3% | NEW | — |
| 29 |  $MSFT | MICROSOFT CORP | $25.8M | 1.2% | +2% | 79.8 |
| 30 |  $PG | PROCTER & GAMBLE Co | $22.2M | 1.1% | -0% | 64.6 |
| 31 |  $MCK | MCKESSON CORP | $21.5M | 1.0% | -58% | 63.4 |
| 32 |  $FICO | FAIR ISAAC CORP | $11.4M | 0.5% | +13% | 77.7 |
| 33 |  $GOOGL | Alphabet Inc. | $8.0M | 0.4% | -3% | 78.2 |
| 34 |  $PANW | Palo Alto Networks Inc | $8.0M | 0.4% | -31% | 65.5 |
| 35 |  $BRK.B | BERKSHIRE HATHAWAY INC | $6.0M | 0.3% | +0% | 73.8 |
| 36 |  $ANET | Arista Networks, Inc. | $5.9M | 0.3% | -0% | 81.9 |
| 37 |  $TSLA | Tesla, Inc. | $5.4M | 0.3% | +5% | 53.9 |
| 38 |  $SCHW | SCHWAB CHARLES CORP | $4.2M | 0.2% | -1% | 79.4 |
| 39 |  $WFC | WELLS FARGO & COMPANY/MN | $4.0M | 0.2% | +4% | 61.8 |
| 40 |  $BRK.A | BERKSHIRE HATHAWAY INC | $3.7M | 0.2% | +0% | 73.8 |
| 41 | — | ISHARES TR - CORE MSCI TOTAL | $3.7M | 0.2% | +1% | — |
| 42 |  $LLY | ELI LILLY & Co | $3.3M | 0.2% | -6% | 87.5 |
| 43 |  $V | VISA INC. | $3.2M | 0.1% | -9% | 82.9 |
| 44 |  $XOM.R34088 | EXXON MOBIL CORP | $3.1M | 0.1% | -6% | 57.9 |
| 45 |  $ADSK | Autodesk, Inc. | $2.8M | 0.1% | -1% | 78.6 |
| 46 | — | ISHARES INC - MSCI WORLD ETF | $2.7M | 0.1% | -8% | — |
| 47 |  $CVX | CHEVRON CORP | $2.7M | 0.1% | -5% | 62.8 |
| 48 |  $SPY | SPDR S&P 500 ETF TRUST | $2.6M | 0.1% | +7% | — |
| 49 |  $ABBV | AbbVie Inc. | $2.4M | 0.1% | -5% | 72.6 |
| 50 |  $MCD | MCDONALDS CORP | $2.4M | 0.1% | -42% | 69 |
| 51 |  $AMD | ADVANCED MICRO DEVICES INC | $1.9M | 0.1% | +5% | 79.8 |
| 52 | — | ISHARES TR - CORE S&P500 ETF | $1.4M | 0.1% | -29% | — |
| 53 |  $PLTR | Palantir Technologies Inc. | $1.3M | 0.1% | -93% | 84.6 |
| 54 |  $MMM | 3M CO | $1.2M | 0.1% | -3% | 64.9 |
| 55 | — | ISHARES TR - CORE 1 5 YR USD | $1.2M | 0.1% | +2% | — |
| 56 |  $CSCO | CISCO SYSTEMS, INC. | $1.1M | 0.1% | -4% | 70.3 |
| 57 |  $QQQ | INVESCO QQQ TRUST, SERIES 1 | $1.1M | 0.1% | -13% | — |
| 58 |  $RTX | RTX Corp | $1.1M | 0.1% | -5% | 73.2 |
| 59 |  $MRK | Merck & Co., Inc. | $1.1M | 0.1% | -13% | 59.9 |
| 60 |  $TXN | TEXAS INSTRUMENTS INC | $1.1M | 0.1% | +1% | 73.4 |
| 61 | — | SCHWAB STRATEGIC TR - 5 10YR CORP BD | $1.1M | 0.1% | +5% | — |
| 62 |  $INTC | INTEL CORP | $1.0M | 0.1% | +24% | 45.6 |
| 63 | — | ISHARES TR - 10+ YR INVST GRD | $986,839 | 0.1% | +5% | — |
| 64 |  $PHM | PULTEGROUP INC/MI/ | $980,365 | 0.1% | -3% | 55.3 |
| 65 |  $ON | ON SEMICONDUCTOR CORP | $979,718 | 0.1% | +0% | 55 |
| 66 |  $CRM | Salesforce, Inc. | $908,941 | 0.0% | -16% | 77 |
| 67 |  $CRUS | CIRRUS LOGIC, INC. | $881,674 | 0.0% | +4% | 66.8 |
| 68 |  $LRCX | LAM RESEARCH CORP | $873,695 | 0.0% | +1% | 79.4 |
| 69 |  $CLX | CLOROX CO /DE/ | $852,661 | 0.0% | -6% | 54.1 |
| 70 |  $GS | GOLDMAN SACHS GROUP INC | $820,221 | 0.0% | -7% | 73.5 |
| 71 |  $C | CITIGROUP INC | $812,188 | 0.0% | +5% | 65 |
| 72 | — | STATE STR SPDR DOW JONES IND - UT SER 1 | $804,919 | 0.0% | +3% | — |
| 73 |  $CW | CURTISS WRIGHT CORP | $786,555 | 0.0% | +3% | 69.5 |
| 74 |  $UBER | Uber Technologies, Inc | $779,761 | 0.0% | -6% | 73.5 |
| 75 |  $CL | COLGATE PALMOLIVE CO | $769,195 | 0.0% | +12% | 61.3 |
| 76 | — | VANGUARD INDEX FDS - S&P 500 ETF SHS | $758,581 | 0.0% | -17% | — |
| 77 |  $HSBC | HSBC HOLDINGS PLC | $739,039 | 0.0% | +1% | — |
| 78 |  $BAC | BANK OF AMERICA CORP /DE/ | $676,296 | 0.0% | -1% | 67.6 |
| 79 |  $DHI | HORTON D R INC /DE/ | $663,736 | 0.0% | +7% | 53.6 |
| 80 |  $UNP | UNION PACIFIC CORP | $656,336 | 0.0% | -42% | 69.7 |
| 81 |  $MUFG | MITSUBISHI UFJ FINANCIAL GROUP INC | $650,821 | 0.0% | +7% | — |
| 82 |  $FTNT | Fortinet, Inc. | $647,355 | 0.0% | +3% | 80.1 |
| 83 |  $BX | Blackstone Inc. | $592,586 | 0.0% | -5% | 74.4 |
| 84 |  $DAL | DELTA AIR LINES, INC. | $586,593 | 0.0% | +23% | 57.5 |
| 85 |  $CRWD | CrowdStrike Holdings, Inc. | $567,776 | 0.0% | +18% | 67.7 |
| 86 |  $ADI | ANALOG DEVICES INC | $554,052 | 0.0% | -6% | 79.2 |
| 87 | — | SELECT SECTOR SPDR TR - ST STR TECHN ETF | $533,456 | 0.0% | +0% | — |
| 88 |  $EBAY | EBAY INC | $529,583 | 0.0% | +14% | 66.4 |
| 89 |  $NTES | NetEase, Inc. | $523,452 | 0.0% | +0% | — |
| 90 |  $ORCL | ORACLE CORP | $513,649 | 0.0% | +0% | 66.2 |
| 91 | — | ISHARES TR - ISHARES SEMICDTR | $494,273 | 0.0% | +0% | — |
| 92 |  $KLAC | KLA CORP | $483,943 | 0.0% | +806% | 78.6 |
| 93 |  $ADP | AUTOMATIC DATA PROCESSING INC | $468,503 | 0.0% | -6% | 69.8 |
| 94 |  $TT | Trane Technologies plc | $465,620 | 0.0% | +0% | — |
| 95 | — | VANGUARD INDEX FDS - TOTAL STK MKT | $464,400 | 0.0% | -3% | — |
| 96 | — | ISHARES TR - EXPND TEC SC ETF | $460,641 | 0.0% | +46% | — |
| 97 |  $HUT | Hut 8 Corp. | $460,164 | 0.0% | NEW | 37.4 |
| 98 |  $PEP | PEPSICO INC | $455,565 | 0.0% | -10% | 63.4 |
| 99 |  $LEN | LENNAR CORP /NEW/ | $405,667 | 0.0% | +15% | 47.2 |
| 100 |  $TMO | THERMO FISHER SCIENTIFIC INC. | $401,088 | 0.0% | -11% | 65.1 |
| 101 |  $SYK | STRYKER CORP | $384,313 | 0.0% | -31% | 72.1 |
| 102 |  $TJX | TJX COMPANIES INC /DE/ | $382,386 | 0.0% | +32% | 68.7 |
| 103 |  $SHOP | SHOPIFY INC. | $381,932 | 0.0% | +37% | 64.9 |
| 104 |  $SJM | J M SMUCKER Co | $375,413 | 0.0% | +17% | 59.1 |
| 105 |  $EXPE | Expedia Group, Inc. | $366,164 | 0.0% | +20% | 71.1 |
| 106 | — | ISHARES TR - RUS 1000 GRW ETF | $345,193 | 0.0% | +300% | — |
| 107 |  $MTCH | Match Group, Inc. | $332,785 | 0.0% | +25% | 63.1 |
| 108 |  $ENTG | ENTEGRIS INC | $329,504 | 0.0% | -1% | 58 |
| 109 |  $COHR | COHERENT CORP. | $324,649 | 0.0% | -3% | 58.5 |
| 110 |  $XYL | Xylem Inc. | $322,595 | 0.0% | -18% | 65.8 |
| 111 |  $UAL | United Airlines Holdings, Inc. | $318,761 | 0.0% | NEW | 60.8 |
| 112 |  $IDXX | IDEXX LABORATORIES INC /DE | $315,864 | 0.0% | +34% | 73.8 |
| 113 |  $BMY | BRISTOL MYERS SQUIBB CO | $302,604 | 0.0% | -24% | 70.4 |
| 114 |  $T | AT&T INC. | $291,270 | 0.0% | -30% | 65.7 |
| 115 | — | VANGUARD TAX-MANAGED FDS - VAN FTSE DEV MKT | $291,128 | 0.0% | NEW | — |
| 116 | — | SCHWAB STRATEGIC TR - US LRG CAP ETF | $289,439 | 0.0% | -8% | — |
| 117 |  $MNST | Monster Beverage Corp | $285,188 | 0.0% | NEW | 71.3 |
| 118 |  $PTC | PTC INC. | $276,981 | 0.0% | -2% | 74.7 |
| 119 |  $CCZ | COMCAST CORP | $270,958 | 0.0% | -18% | 59.5 |
| 120 | — | ISHARES TR - CORE S&P US GWT | $269,909 | 0.0% | NEW | — |
| 121 | — | SCHWAB STRATEGIC TR - INTL EQTY ETF | $266,086 | 0.0% | -6% | — |
| 122 | — | SCHWAB STRATEGIC TR - FUNDAMENTAL US L | $265,614 | 0.0% | +0% | — |
| 123 | — | ISHARES TR - DOW JONES US ETF | $263,577 | 0.0% | +0% | — |
| 124 | — | ISHARES TR - CORE S&P US VLU | $261,166 | 0.0% | NEW | — |
| 125 |  $PH | Parker-Hannifin Corp | $259,202 | 0.0% | +2% | 65.8 |
| 126 |  $HOOD | Robinhood Markets, Inc. | $258,823 | 0.0% | -22% | 82.1 |
| 127 |  $IT | GARTNER INC | $258,073 | 0.0% | -6% | 60.2 |
| 128 |  $PACB | PACIFIC BIOSCIENCES OF CALIFORNIA, INC. | $255,528 | 0.0% | +0% | 17.1 |
| 129 |  $QCOM | QUALCOMM INC/DE | $254,009 | 0.0% | NEW | 70.5 |
| 130 |  $NSC | NORFOLK SOUTHERN CORP | $253,560 | 0.0% | -8% | 63.2 |
| 131 |  $LNG | Cheniere Energy, Inc. | $241,400 | 0.0% | +0% | 66.5 |
| 132 |  $ABEO | ABEONA THERAPEUTICS INC. | $238,017 | 0.0% | NEW | 23.7 |
| 133 |  $CI | Cigna Group | $233,225 | 0.0% | +10% | 66.2 |
| 134 |  $ABT | ABBOTT LABORATORIES | $226,253 | 0.0% | -35% | 65.5 |
| 135 |  $HIMS | Hims & Hers Health, Inc. | $214,954 | 0.0% | NEW | 53.4 |
| 136 |  $AON | Aon plc | $208,301 | 0.0% | +1% | — |
| 137 |  $PHG | KONINKLIJKE PHILIPS NV | $208,139 | 0.0% | +3% | — |
| 138 |  $KO | COCA COLA CO | $207,903 | 0.0% | NEW | 69.5 |
| 139 |  $DDOG | Datadog, Inc. | $205,945 | 0.0% | NEW | 71.4 |
| 140 |  $TMC | TMC the metals Co Inc. | $44,300 | 0.0% | +0% | — |
New Positions (13)
$ROST ROSS STORES, INC.$32.1M$FTI TechnipFMC plc$27.4M$HUT Hut 8 Corp.$460,164$UAL United Airlines Holdings, Inc.$318,761$MNST Monster Beverage Corp$285,188$QCOM QUALCOMM INC/DE$254,009$ABEO ABEONA THERAPEUTICS INC.$238,017$HIMS Hims & Hers Health, Inc.$214,954$KO COCA COLA CO$207,903$DDOG Datadog, Inc.$205,945Exited Positions (21)
$GLDM World Gold Trust
$IBIT iShares Bitcoin Trust ETF
$DIS Walt Disney Co
$GLD SPDR GOLD TRUST
$ISRG INTUITIVE SURGICAL INC
$BSX BOSTON SCIENTIFIC CORP
$ACN Accenture plc
$INTU INTUIT INC.
$COIN Coinbase Global, Inc.
$COP CONOCOPHILLIPS
$NFLX NETFLIX INC
$MA Mastercard Inc
$ADBE ADOBE INC.
$AXP AMERICAN EXPRESS CO
$HD HOME DEPOT, INC.Browse Top Institutional Investors
13F Pro tracks 8,700+ institutional investors filing 13F reports with the SEC.
to search all 8,700+ institutional filers.
Available Analysis
13F Pro tracks comprehensive institutional data for Main Street Research LLC including:
Track Main Street Research LLC's Full Portfolio
See every holding, quarter-over-quarter changes, sector allocation, and accumulation patterns for Main Street Research LLC and 8,700+ other institutional investors.
Free tier includes full 13F search and fund profiles. Pro starts at $6.67/mo (billed annually).
AI-Powered Hedge Fund Analysis: Main Street Research LLC
13F Pro is an AI hedge fund tracker and stock research platform. For Main Street Research LLC (SEC CIK: 1513211), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.
Every holding in Main Street Research LLC's portfolio is scored on a 32-signal AI quality ranking (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.