Main Street Research LLC

In its 13F for Q2 2026 (holdings as of June 30, 2026, filed July 29, 2026), Main Street Research LLC reported 140 stock positions worth $2.1 billion. Its top holding was Nvidia (NVDA) at 6.0% of the portfolio, followed by Micron Technology (MU, 5.9%) and Apple (AAPL, 5.5%). Compared with Q1 2026, it opened 13 new positions, sold out of 21, added to 65 and reduced 52. The biggest buy was Corning (GLW, shares +2%) and the biggest sale an exit from SPDR Gold Minishares Trust (GLDM).

Most Recent 13F
Q2 2026
Location
SAUSALITO, CA
CIK
0001513211
Portfolio Value
$2.1B (Q2 2026)
SEC Filing
0001420506-26-001335 ↗ filed Jul 29, 2026

Holdings Value

0$500.0M$1.0B$1.5B$2.0B$2.5B Q1 2024: $1.5B Q1 2024 Q2 2024: $1.5B Q2 2024 Q3 2024: $1.6B Q3 2024 Q4 2024: $1.6B Q4 2024 Q1 2025: $1.5B Q1 2025 Q2 2025: $1.6B Q2 2025 Q3 2025: $1.9B Q3 2025 Q4 2025: $1.7B Q4 2025 Q1 2026: $1.7B Q1 2026 Q2 2026: $2.1B $2.1B Q2 2026

Holdings 140 stocks · $2.1B
NVDA Nvidia Corp. 5.95% 630,053 $126.1M Add +1.5%
MU Micron Technology Inc. 5.92% 108,636 $125.4M Reduce -0.4%
AAPL Apple Inc. 5.55% 406,129 $117.5M Add +0.6%
GOOGL Alphabet Inc. Class A 5.35% 316,947 $113.3M Add +1.7%
TSM Taiwan Semiconductor-SP ADR 5.15% 228,429 $109.1M Add +2.4%
GLW Corning Inc. 4.75% 394,058 $100.7M Add +1.6%
XBI SS SPDR S&P Biotech ETF 4.31% 576,754 $91.3M Add +1.6%
ISCF iShares International Small 4.14% 2,027,356 $87.8M Add +3.5%
ASML ASML Holding NV-NY Reg SHS filed as ASML HLDG NV 3.98% 42,396 $84.3M Add +1.7%
AVGO Broadcom Inc. 3.81% 213,841 $80.8M Add +0.7%
JPM JPMorgan Chase & Co. 3.50% 226,299 $74.1M Add +1.1%
EWY iShares MSCI South Korea ETF 3.44% 360,865 $72.9M Reduce -0.3%
CAT Caterpillar Inc. 3.10% 61,759 $65.8M Add +1.1%
AMZN Amazon.com Inc. 3.09% 274,738 $65.5M Add +2.1%
GEV GE Vernova Inc. 2.82% 50,802 $59.7M Add +0.2%
APH Amphenol Corp. Class A 2.57% 308,716 $54.4M Add +2.5%
JNJ Johnson & Johnson 2.26% 188,640 $47.9M Add +0.9%
RY Royal Bank of Canada 2.22% 227,136 $47.0M Add +2.0%
COST Costco Wholesale Corp. 2.10% 47,497 $44.4M Add +2.9%
BHP BHP Group Ltd.-Spon ADR filed as BHP BILLITON LIMITED 2.08% 528,051 $44.0M Add +1.7%
BCS Barclays PLC-Spons ADR 2.06% 1,621,490 $43.6M Add +90.5%
META Meta Platforms Inc. Class A 1.92% 72,187 $40.7M Add +1.7%
KEYS Keysight Technologies Inc. 1.90% 115,108 $40.3M Add +1.9%
CCJ Cameco Corp. 1.88% 391,529 $39.9M Add +0.6%
WMT Walmart Inc. 1.86% 348,650 $39.5M Add +1.1%
AZN Astrazeneca PLC 1.77% 197,417 $37.4M Add +3.5%
ROST Ross Stores Inc. 1.51% 150,755 $32.1M New
FTI Technipfmc PLC 1.29% 413,657 $27.4M New
MSFT Microsoft Corp. 1.22% 69,182 $25.8M Add +2.4%
PG The Procter & Gamble Co. 1.05% 151,073 $22.2M Reduce -0.4%
MCK McKesson Corp. 1.02% 28,475 $21.5M Reduce -58.0%
FICO Fair Isaac Corp. 0.54% 9,580 $11.4M Add +13.2%
GOOG Alphabet Inc. Class C 0.38% 22,707 $8.0M Reduce -3.1%
PANW Palo Alto Networks Inc. 0.38% 23,343 $8.0M Reduce -31.4%
BRK.B Berkshire Hathaway Inc. Class B 0.28% 11,980 $6.0M Add +0.0%
ANET Arista Networks Inc. 0.28% 34,937 $5.9M Reduce -0.1%
TSLA Tesla Inc. 0.26% 12,943 $5.4M Add +4.9%
SCHW Schwab (charles) Corp. 0.20% 45,887 $4.2M Reduce -1.0%
WFC Wells Fargo & Co. 0.19% 48,542 $4.0M Add +3.5%
BRK.A Berkshire Hathaway Inc. Class A 0.18% 5 $3.7M No change
IXUS iShares Core Intl Stock ETF 0.18% 39,073 $3.7M Add +1.3%
LLY Eli Lilly & Co. 0.16% 2,746 $3.3M Reduce -5.6%
V Visa Inc. Class A 0.15% 9,369 $3.2M Reduce -8.6%
XOM Exxon Mobil Corp. 0.14% 22,437 $3.1M Reduce -6.2%
ADSK Autodesk Inc. 0.13% 14,240 $2.8M Reduce -1.1%
URTH iShares MSCI World ETF 0.13% 13,511 $2.7M Reduce -8.3%
CVX Chevron Corp. 0.13% 16,080 $2.7M Reduce -4.6%
SPY SS SPDR S&P 500 ETF Trust-US 0.12% 3,485 $2.6M Add +6.8%
ABBV Abbvie Inc. 0.12% 9,721 $2.4M Reduce -5.2%
MCD McDonald's Corp. 0.11% 8,913 $2.4M Reduce -42.4%
AMD Advanced Micro Devices 0.09% 3,308 $1.9M Add +5.2%
IVV iShares Core S&P 500 ETF 0.06% 1,810 $1.4M Reduce -29.1%
PLTR Palantir Technologies Inc. Class A 0.06% 11,444 $1.3M Reduce -93.2%
MMM 3M Co. 0.06% 7,610 $1.2M Reduce -3.3%
ISTB iShares Core 1-5 Year Usd Bo 0.06% 24,592 $1.2M Add +2.2%
CSCO Cisco Systems Inc. 0.05% 9,682 $1.1M Reduce -3.7%
QQQ Invesco QQQ Trust Series 1 0.05% 1,531 $1.1M Reduce -13.4%
RTX RTX Corp. 0.05% 5,752 $1.1M Reduce -5.2%
MRK Merck & Co. Inc. 0.05% 8,298 $1.1M Reduce -12.8%
TXN Texas Instruments Inc. 0.05% 3,560 $1.1M Add +0.9%
SCHI Schwab 5-10 Year Corporate B 0.05% 46,488 $1.1M Add +4.9%
INTC Intel Corp. 0.05% 7,350 $1.0M Add +24.2%
IGLB iShares 10+ Year Inv GR Corp. 0.05% 19,721 $987K Add +5.2%
PHM Pultegroup Inc. 0.05% 7,145 $980K Reduce -3.2%
ON On Semiconductor 0.05% 10,363 $980K Add +0.1%
CRM Salesforce Inc. 0.04% 5,802 $909K Reduce -16.2%
CRUS Cirrus Logic Inc. 0.04% 5,936 $882K Add +3.5%
LRCX Lam Research Corp. 0.04% 2,016 $874K Add +1.4%
CLX Clorox Company 0.04% 8,934 $853K Reduce -6.3%
GS Goldman Sachs Group Inc. 0.04% 811 $820K Reduce -7.2%
C Citigroup Inc. 0.04% 5,803 $812K Add +5.0%
DIA SS SPDR Dow Jones Indus Avg filed as STATE STR SPDR DOW JONES IND 0.04% 1,541 $805K Add +2.6%
CW Curtiss-Wright Corp. 0.04% 1,038 $787K Add +2.6%
UBER Uber Technologies Inc. 0.04% 10,806 $780K Reduce -6.0%
CL Colgate-Palmolive Co. 0.04% 8,390 $769K Add +12.1%
VOO Vanguard S&P 500 ETF 0.04% 1,104 $759K Reduce -17.1%
HSBC HSBC Holdings PLC-Spons ADR filed as HSBC HLDGS PLC 0.03% 7,772 $739K Add +0.5%
BAC Bank of America Corp. 0.03% 11,869 $676K Reduce -0.6%
DHI D.R. Horton Inc. 0.03% 4,075 $664K Add +7.0%
UNP Union Pacific Corp. 0.03% 2,413 $656K Reduce -41.6%
MUFG Mitsubishi Ufj Finl-Spon ADR 0.03% 32,721 $651K Add +7.5%
FTNT Fortinet Inc. 0.03% 4,214 $647K Add +3.4%
BX Blackstone Inc. 0.03% 5,036 $593K Reduce -5.3%
DAL Delta Air Lines Inc. 0.03% 6,263 $587K Add +23.0%
CRWD CrowdStrike Holdings Inc. Class A 0.03% 744 $568K Add +18.5%
ADI Analog Devices Inc. 0.03% 1,395 $554K Reduce -6.4%
XLK SS Technology Select Sector 0.03% 2,800 $533K No change
EBAY eBay Inc. 0.03% 4,739 $530K Add +13.5%
NTES Netease Inc.-ADR 0.02% 4,085 $523K No change
ORCL Oracle Corp. 0.02% 3,505 $514K Add +0.2%
SOXX iShares Semiconductor ETF 0.02% 771 $494K No change
KLAC KLA Corp. 0.02% 1,604 $484K Reduce -9.4%
ADP Automatic Data Processing 0.02% 2,092 $469K Reduce -6.3%
TT Trane Technologies PLC 0.02% 948 $466K Add +0.1%
VTI VG Morningstar TS MKT ETF-US 0.02% 1,255 $464K Reduce -2.6%
IGM iShares Expanded Tech Sector 0.02% 2,816 $461K Add +45.8%
HUT Hut 8 Corp. 0.02% 3,986 $460K New
PEP Pepsico Inc. 0.02% 3,365 $456K Reduce -9.6%
LEN Lennar Corp. Class A 0.02% 4,483 $406K Add +14.8%
TMO Thermo Fisher Scientific Inc. 0.02% 800 $401K Reduce -11.1%
SYK Stryker Corp. 0.02% 1,221 $384K Reduce -30.7%
TJX TJX Companies Inc. filed as TJX COS INC NEW 0.02% 2,524 $382K Add +31.5%
SHOP Shopify Inc. Class A 0.02% 3,345 $382K Add +37.3%
SJM The JM Smucker Co. filed as SMUCKER J M CO 0.02% 3,337 $375K Add +16.8%
EXPE Expedia Group Inc. 0.02% 1,431 $366K Add +20.4%
IWF iShares Russell 1000 Growth 0.02% 2,780 $345K No change
MTCH Match Group Inc. 0.02% 8,746 $333K Add +24.8%
ENTG Entegris Inc. 0.02% 1,832 $330K Reduce -1.1%
COHR Coherent Corp. 0.02% 823 $325K Reduce -2.7%
XYL Xylem Inc. 0.02% 2,729 $323K Reduce -17.8%
UAL United Airlines Holdings Inc. 0.01% 2,344 $319K New
IDXX Idexx Laboratories Inc. 0.01% 600 $316K Add +34.2%
BMY Bristol-Myers Squibb Co. 0.01% 5,252 $303K Reduce -24.3%
T AT&T Inc. 0.01% 14,071 $291K Reduce -30.3%
VEA Vanguard Ftse Developed ETF 0.01% 4,086 $291K New
SCHX Schwab US Large-Cap ETF 0.01% 9,835 $289K Reduce -7.5%
MNST Monster Beverage Corp. 0.01% 2,967 $285K New
PTC PTC Inc. 0.01% 2,438 $277K Reduce -1.7%
CMCSA Comcast Corp. Class A 0.01% 11,037 $271K Reduce -18.4%
IUSG iShares Core S&P U.S. Growth 0.01% 1,435 $270K New
SCHF Schwab Intl Equity ETF 0.01% 9,606 $266K Reduce -5.9%
FNDX Schwab Fndmntl US LRG Co. ETF 0.01% 8,541 $266K No change
IYY iShares Dow Jones U.S. ETF 0.01% 1,446 $264K No change
IUSV iShares Core S&P U.S. Value 0.01% 2,371 $261K New
PH Parker Hannifin Corp. 0.01% 265 $259K Add +1.5%
HOOD Robinhood Markets Inc. Class A 0.01% 2,581 $259K Reduce -21.6%
IT Gartner Inc. 0.01% 1,991 $258K Reduce -5.9%
PACB Pacific Biosciences of Calif 0.01% 152,100 $256K No change
QCOM Qualcomm Inc. 0.01% 1,375 $254K New
NSC Norfolk Southern Corp. 0.01% 806 $254K Reduce -8.1%
LNG Cheniere Energy Inc. 0.01% 1,010 $241K No change
ABEO Abeona Therapeutics Inc. 0.01% 38,514 $238K New
CI The Cigna Group 0.01% 846 $233K Add +9.7%
ABT Abbott Laboratories 0.01% 2,493 $226K Reduce -35.4%
HIMS Hims & Hers Health Inc. 0.01% 6,200 $215K New
AON Aon PLC Class A 0.01% 628 $208K Add +1.0%
PHG Koninklijke Philips NVR- NY 0.01% 7,655 $208K Add +3.2%
KO The Coca-Cola Co. 0.01% 2,558 $208K New
DDOG Datadog Inc. Class A 0.01% 791 $206K New
TMC TMC the Metals Co. Inc. 0.00% 10,000 $44K No change

Portfolio Sells Q1 2026 → Q2 2026
GLDM SPDR Gold Minishares Trust Sold out 0.00% −2.53
MCK McKesson Corp. Reduce -58.0% 1.02% −2.40
PLTR Palantir Technologies Inc. Class A Reduce -93.2% 0.06% −1.36
IBIT iShares Bitcoin Trust ETF Sold out 0.00% −0.44
PG The Procter & Gamble Co. Reduce -0.4% 1.05% −0.23
MCD McDonald's Corp. Reduce -42.4% 0.11% −0.17
XOM Exxon Mobil Corp. Reduce -6.2% 0.14% −0.09
CVX Chevron Corp. Reduce -4.6% 0.13% −0.08
ADSK Autodesk Inc. Reduce -1.1% 0.13% −0.07
DIS The Walt Disney Co. Sold out 0.00% −0.06
SCHW Schwab (charles) Corp. Reduce -1.0% 0.20% −0.05
GLD SPDR Gold Shares Sold out 0.00% −0.05
IVV iShares Core S&P 500 ETF Reduce -29.1% 0.06% −0.03
CRM Salesforce Inc. Reduce -16.2% 0.04% −0.03
V Visa Inc. Class A Reduce -8.6% 0.15% −0.03
UNP Union Pacific Corp. Reduce -41.6% 0.03% −0.03
URTH iShares MSCI World ETF Reduce -8.3% 0.13% −0.03
ISRG Intuitive Surgical Inc. Sold out 0.00% −0.02
BSX Boston Scientific Corp. Sold out 0.00% −0.02
T AT&T Inc. Reduce -30.3% 0.01% −0.02
ACN Accenture PLC Class A Sold out 0.00% −0.02
INTU Intuit Inc. Sold out 0.00% −0.02
CLX Clorox Company Reduce -6.3% 0.04% −0.02
RTX RTX Corp. Reduce -5.2% 0.05% −0.02
MRK Merck & Co. Inc. Reduce -12.8% 0.05% −0.02
COIN Coinbase Global Inc. Class A Sold out 0.00% −0.02
SYK Stryker Corp. Reduce -30.7% 0.02% −0.02
COP Conocophillips Sold out 0.00% −0.01
NFLX Netflix Inc. Sold out 0.00% −0.01
ABBV Abbvie Inc. Reduce -5.2% 0.12% −0.01
MA Mastercard Inc. Class A Sold out 0.00% −0.01
ADBE Adobe Inc. Sold out 0.00% −0.01
AXP American Express Co. Sold out 0.00% −0.01
HD Home Depot Inc. Sold out 0.00% −0.01
TMUS T-Mobile US Inc. Sold out 0.00% −0.01
GOOG Alphabet Inc. Class C Reduce -3.1% 0.38% −0.01
COF Capital One Financial Corp. Sold out 0.00% −0.01
ABT Abbott Laboratories Reduce -35.4% 0.01% −0.01
NEE Nextera Energy Inc. Sold out 0.00% −0.01
PEP Pepsico Inc. Reduce -9.6% 0.02% −0.01
TDY Teledyne Technologies Inc. Sold out 0.00% −0.01
VRT Vertiv Holdings Co. Class A Sold out 0.00% −0.01
OMDA Omada Health Inc. Sold out 0.00% −0.01
UBER Uber Technologies Inc. Reduce -6.0% 0.04% −0.01
VOO Vanguard S&P 500 ETF Reduce -17.1% 0.04% −0.01
BMY Bristol-Myers Squibb Co. Reduce -24.3% 0.01% −0.01
CMCSA Comcast Corp. Class A Reduce -18.4% 0.01% −0.01
MMM 3M Co. Reduce -3.3% 0.06% −0.01
XYL Xylem Inc. Reduce -17.8% 0.02% −0.01
BX Blackstone Inc. Reduce -5.3% 0.03% −0.01

Portfolio Buys Q1 2026 → Q2 2026
GLW Corning Inc. Add +1.6% 4.75% +1.68
ROST Ross Stores Inc. New 1.51% +1.51
FTI Technipfmc PLC New 1.29% +1.29
BCS Barclays PLC-Spons ADR Add +90.5% 2.06% +1.01
ASML ASML Holding NV-NY Reg SHS Add +1.7% 3.98% +0.78
TSM Taiwan Semiconductor-SP ADR Add +2.4% 5.15% +0.76
CAT Caterpillar Inc. Add +1.1% 3.10% +0.59
APH Amphenol Corp. Class A Add +2.5% 2.57% +0.36
GEV GE Vernova Inc. Add +0.2% 2.82% +0.24
GOOGL Alphabet Inc. Class A Add +1.7% 5.35% +0.13
RY Royal Bank of Canada Add +2.0% 2.22% +0.12
XBI SS SPDR S&P Biotech ETF Add +1.6% 4.31% +0.09
AMD Advanced Micro Devices Add +5.2% 0.09% +0.05
KEYS Keysight Technologies Inc. Add +1.9% 1.90% +0.05
INTC Intel Corp. Add +24.2% 0.05% +0.03
HUT Hut 8 Corp. New 0.02% +0.02
LRCX Lam Research Corp. Add +1.4% 0.04% +0.02
UAL United Airlines Holdings Inc. New 0.01% +0.01
FICO Fair Isaac Corp. Add +13.2% 0.54% +0.01
VEA Vanguard Ftse Developed ETF New 0.01% +0.01
MNST Monster Beverage Corp. New 0.01% +0.01
IUSG iShares Core S&P U.S. Growth New 0.01% +0.01
CRWD CrowdStrike Holdings Inc. Class A Add +18.5% 0.03% +0.01
IUSV iShares Core S&P U.S. Value New 0.01% +0.01
QCOM Qualcomm Inc. New 0.01% +0.01
ABEO Abeona Therapeutics Inc. New 0.01% +0.01
FTNT Fortinet Inc. Add +3.4% 0.03% +0.01
TXN Texas Instruments Inc. Add +0.9% 0.05% +0.01
HIMS Hims & Hers Health Inc. New 0.01% +0.01
KO The Coca-Cola Co. New 0.01% +0.01
DDOG Datadog Inc. Class A New 0.01% +0.01
ON On Semiconductor Add +0.1% 0.05% +0.01
IGM iShares Expanded Tech Sector Add +45.8% 0.02% +0.01
DAL Delta Air Lines Inc. Add +23.0% 0.03% +0.01
MTCH Match Group Inc. Add +24.8% 0.02% +0.00
EBAY eBay Inc. Add +13.5% 0.03% +0.00
C Citigroup Inc. Add +5.0% 0.04% +0.00
SJM The JM Smucker Co. Add +16.8% 0.02% +0.00
EXPE Expedia Group Inc. Add +20.4% 0.02% +0.00
SHOP Shopify Inc. Class A Add +37.3% 0.02% +0.00
DHI D.R. Horton Inc. Add +7.0% 0.03% +0.00
MUFG Mitsubishi Ufj Finl-Spon ADR Add +7.5% 0.03% +0.00
IDXX Idexx Laboratories Inc. Add +34.2% 0.01% +0.00
TJX TJX Companies Inc. Add +31.5% 0.02% +0.00
LEN Lennar Corp. Class A Add +14.8% 0.02% −0.00
SPY SS SPDR S&P 500 ETF Trust-US Add +6.8% 0.12% −0.00
CL Colgate-Palmolive Co. Add +12.1% 0.04% −0.00
CI The Cigna Group Add +9.7% 0.01% −0.00
TT Trane Technologies PLC Add +0.1% 0.02% −0.00
PH Parker Hannifin Corp. Add +1.5% 0.01% −0.00

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 140$2.1BNVDA, MU, AAPL, GOOGL, TSM
Q1 2026 148$1.7BNVDA, AAPL, GOOGL, ISCF, TSM
Q4 2025 129$1.7BNVDA, GOOGL, MSFT, ISCF, AAPL
Q3 2025 129$1.9BNVDA, AAPL, MSFT, PLTR, HOOD
Q2 2025 115$1.6BNVDA, JPM, PG, PLTR, COST
Q1 2025 101$1.5BAAPL, PLTR, PG, V, AMZN
Q4 2024 110$1.6BAAPL, NVDA, PLTR, AMZN, PG
Q3 2024 109$1.6BNVDA, AAPL, PG, IWM, AMZN
Q2 2024 103$1.5BNVDA, AAPL, NVO, PG, MCK
Q1 2024 107$1.5BNVDA, IWM, NVO, AAPL, PG