Main Street Research LLC

In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 9, 2026), Main Street Research LLC reported 129 stock positions worth $1.7 billion. Its top holding was Nvidia (NVDA) at 6.4% of the portfolio, followed by Alphabet Class A (GOOGL, 5.3%) and Microsoft (MSFT, 4.7%). Compared with Q3 2025, it opened 17 new positions, sold out of 17, added to 25 and reduced 77. The biggest buy was a new position in SS SPDR S&P Biotech ETF (XBI) and the biggest sale Netflix (NFLX, shares −98%).

Most Recent 13F
Q2 2026
Location
SAUSALITO, CA
CIK
0001513211
Portfolio Value
$1.7B (Q4 2025)
SEC Filing
0001420506-26-000210 ↗ filed Feb 9, 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 $1.7B Q4 2025 Q1 2026: $1.7B Q1 2026 Q2 2026: $2.1B Q2 2026

Holdings 129 stocks · $1.7B
NVDA Nvidia Corp. 6.36% 595,844 $111.1M Reduce -0.9%
GOOGL Alphabet Inc. Class A 5.33% 297,544 $93.1M Reduce -0.8%
MSFT Microsoft Corp. 4.65% 168,207 $81.3M Add +0.0%
ISCF iShares International Small 4.53% 1,907,800 $79.1M Add +27.6%
AAPL Apple Inc. 4.52% 290,937 $79.1M Reduce -17.2%
PLTR Palantir Technologies Inc. Class A 4.48% 440,250 $78.3M Reduce -3.4%
JPM JPMorgan Chase & Co. 4.09% 221,919 $71.5M Reduce -1.3%
AVGO Broadcom Inc. 4.07% 205,395 $71.1M Reduce -1.4%
TSM Taiwan Semiconductor-SP ADR 3.80% 218,147 $66.5M Reduce -1.2%
V Visa Inc. Class A 3.49% 174,088 $61.1M Reduce -1.7%
HOOD Robinhood Markets Inc. Class A 3.44% 532,399 $60.2M Reduce -1.3%
AMZN Amazon.com Inc. 3.43% 259,849 $60.0M Reduce -1.2%
META Meta Platforms Inc. Class A 3.27% 86,547 $57.1M Reduce -3.0%
MCK McKesson Corp. 3.16% 67,361 $55.3M Reduce -2.2%
COST Costco Wholesale Corp. 3.08% 62,366 $53.8M Reduce -1.7%
XBI SS SPDR S&P Biotech ETF 2.51% 360,526 $44.0M New
ASML ASML Holding NV-NY Reg SHS 2.46% 40,118 $42.9M Reduce -0.8%
BCS Barclays PLC-Spons ADR 2.45% 1,682,837 $42.8M Reduce -0.7%
APH Amphenol Corp. Class A 2.29% 295,357 $40.0M Reduce -0.7%
GLDM SPDR Gold Minishares Trust 2.26% 462,316 $39.5M Reduce -1.0%
WMT Walmart Inc. 2.16% 338,395 $37.8M Reduce -0.7%
JNJ Johnson & Johnson 2.12% 179,318 $37.1M Add +1475.0%
UBER Uber Technologies Inc. 2.09% 446,905 $36.5M Reduce -1.3%
CCJ Cameco Corp. 2.00% 381,868 $34.9M Add +4.8%
EWY iShares MSCI South Korea ETF 1.98% 355,461 $34.6M New
AZN Astrazeneca PLC-Spons ADR 1.95% 371,217 $34.1M New
CAT Caterpillar Inc. 1.95% 59,559 $34.1M Add +1833.1%
GEV GE Vernova Inc. 1.84% 49,161 $32.1M Add +1.1%
IBN Icici Bank Ltd.-Spon ADR 1.74% 1,022,131 $30.5M Reduce -2.8%
PG The Procter & Gamble Co. 1.24% 151,084 $21.7M Reduce -1.1%
BKNG Booking Holdings Inc. 1.17% 3,807 $20.4M Reduce -38.2%
IBIT iShares Bitcoin Trust ETF 0.51% 179,540 $8.9M Reduce -5.9%
GOOG Alphabet Inc. Class C 0.36% 20,091 $6.3M Add +2.2%
BRK.B Berkshire Hathaway Inc. Class B 0.35% 12,116 $6.1M Reduce -8.6%
TSLA Tesla Inc. 0.33% 12,748 $5.7M Reduce -2.1%
MCD McDonald's Corp. 0.33% 18,588 $5.7M Reduce -2.0%
ADSK Autodesk Inc. 0.24% 14,291 $4.2M Add +1.5%
FICO Fair Isaac Corp. 0.24% 2,492 $4.2M Reduce -71.1%
BRK.A Berkshire Hathaway Inc. Class A 0.22% 5 $3.8M No change
SCHW Schwab (charles) Corp. 0.18% 31,782 $3.2M Reduce -6.8%
URTH iShares MSCI World ETF 0.16% 15,138 $2.8M Reduce -9.5%
XOM Exxon Mobil Corp. 0.16% 23,209 $2.8M Reduce -4.2%
IXUS iShares Core Intl Stock ETF 0.15% 31,573 $2.7M Reduce -4.9%
PANW Palo Alto Networks Inc. 0.14% 13,235 $2.4M Reduce -61.6%
ABBV Abbvie Inc. 0.12% 9,355 $2.1M Reduce -1.7%
WFC Wells Fargo & Co. 0.11% 19,846 $1.8M Reduce -46.5%
SPY SS SPDR S&P 500 ETF Trust-US 0.10% 2,663 $1.8M Add +0.3%
CRM Salesforce Inc. 0.10% 6,364 $1.7M Add +152.7%
LLY Eli Lilly & Co. 0.09% 1,419 $1.5M Reduce -47.1%
MU Micron Technology Inc. 0.09% 5,323 $1.5M Reduce -10.9%
CVX Chevron Corp. 0.08% 9,520 $1.5M Reduce -43.3%
MMM 3M Co. 0.07% 8,059 $1.3M Reduce -0.4%
ISTB iShares Core 1-5 Year Usd Bo 0.06% 22,763 $1.1M Add +7.2%
RTX RTX Corp. 0.06% 5,496 $1.0M Reduce -1.2%
NFLX Netflix Inc. 0.06% 10,621 $996K Reduce -97.5%
CLX Clorox Company 0.05% 9,125 $920K Reduce -2.6%
SCHI Schwab 5-10 Year Corporate B 0.05% 38,493 $884K Add +12.4%
IVV iShares Core S&P 500 ETF 0.05% 1,260 $863K Reduce -13.1%
QQQ Invesco QQQ Trust Series 1 0.05% 1,345 $826K Reduce -15.7%
MRK Merck & Co. Inc. 0.05% 7,784 $826K Reduce -16.0%
IGLB iShares 10+ Year Inv GR Corp. 0.05% 15,941 $804K Add +12.5%
BMY Bristol-Myers Squibb Co. 0.05% 14,620 $789K Reduce -0.7%
CSCO Cisco Systems Inc. 0.04% 9,684 $746K Reduce -7.5%
AMD Advanced Micro Devices 0.04% 3,422 $733K Reduce -2.2%
TMO Thermo Fisher Scientific Inc. 0.04% 1,151 $667K Add +15.6%
SYK Stryker Corp. 0.04% 1,843 $649K Add +2.9%
BAC Bank of America Corp. filed as BANK AMERICA CORP 0.04% 11,118 $611K Reduce -11.3%
HSBC HSBC Holdings PLC-Spons ADR filed as HSBC HLDGS PLC 0.03% 7,696 $605K Add +4.6%
ADP Automatic Data Processing 0.03% 2,309 $598K Reduce -6.8%
ORCL Oracle Corp. 0.03% 3,031 $591K Reduce -21.0%
BSX Boston Scientific Corp. 0.03% 6,023 $574K Reduce -6.6%
C Citigroup Inc. 0.03% 4,740 $553K Reduce -3.1%
ACN Accenture PLC Class A 0.03% 2,059 $552K Reduce -17.1%
NTES Netease Inc.-ADR 0.03% 4,000 $550K Reduce -2.1%
UNP Union Pacific Corp. 0.03% 2,342 $542K New
CL Colgate-Palmolive Co. 0.03% 6,618 $523K Reduce -1.2%
VIG Vanguard Dividend Apprec ETF 0.03% 2,361 $519K New
INTU Intuit Inc. 0.03% 779 $516K Add +3.6%
VTI VG Morningstar TS MKT ETF-US 0.03% 1,538 $516K Reduce -6.9%
ITOT iShares Core S&P Total U.S. 0.03% 3,405 $506K No change
CW Curtiss-Wright Corp. 0.03% 917 $506K Add +3.3%
MUFG Mitsubishi Ufj Finl-Spon ADR 0.03% 30,205 $479K New
ABT Abbott Laboratories 0.03% 3,654 $458K Add +3.5%
XYL Xylem Inc. 0.03% 3,305 $450K Reduce -0.2%
TMUS T-Mobile US Inc. 0.03% 2,162 $439K Reduce -98.8%
HUT Hut 8 Corp. 0.02% 8,986 $413K New
TT Trane Technologies PLC 0.02% 947 $369K Reduce -98.8%
IWF iShares Russell 1000 Growth 0.02% 766 $363K No change
COIN Coinbase Global Inc. Class A 0.02% 1,551 $351K Reduce -0.1%
T AT&T Inc. 0.02% 13,914 $346K Reduce -0.9%
ADI Analog Devices Inc. 0.02% 1,248 $338K Add +3.1%
HD Home Depot Inc. 0.02% 962 $331K Reduce -4.8%
DAL Delta Air Lines Inc. 0.02% 4,768 $331K Add +4.9%
SHOP Shopify Inc. Class A 0.02% 2,040 $328K Reduce -22.0%
CMCSA Comcast Corp. Class A 0.02% 10,912 $326K Reduce -2.8%
SJM The JM Smucker Co. filed as SMUCKER J M CO 0.02% 3,330 $326K Reduce -6.4%
NSC Norfolk Southern Corp. 0.02% 1,117 $323K Reduce -5.4%
VOO Vanguard S&P 500 ETF 0.02% 513 $322K Reduce -51.5%
TXN Texas Instruments Inc. 0.02% 1,842 $320K Add +14.8%
DIA SS SPDR Dow Jones Indus Avg filed as SPDR DOW JONES INDL AVERAGE 0.02% 640 $308K No change
PEP Pepsico Inc. 0.02% 2,116 $307K Reduce -9.2%
AXP American Express Co. 0.02% 817 $302K New
TRMB Trimble Inc. 0.02% 3,762 $295K Reduce -3.1%
AON Aon PLC Class A 0.02% 821 $290K Add +30.9%
ISRG Intuitive Surgical Inc. 0.02% 508 $288K New
EBAY eBay Inc. 0.02% 3,286 $286K Reduce -8.1%
MA Mastercard Inc. Class A 0.02% 491 $280K Reduce -17.3%
GLD SPDR Gold Shares 0.02% 689 $273K No change
FNDX Schwab Fndmntl US LRG Co. ETF 0.02% 9,959 $271K Add +16.6%
KLAC KLA Corp. 0.02% 223 $271K Reduce -5.1%
ADBE Adobe Inc. 0.02% 771 $270K Reduce -39.3%
EXPE Expedia Group Inc. 0.02% 950 $269K New
SCHX Schwab US Large-Cap ETF 0.02% 9,835 $265K Reduce -32.3%
LRCX Lam Research Corp. 0.01% 1,524 $261K New
PH Parker Hannifin Corp. 0.01% 292 $257K New
LIN Linde PLC 0.01% 600 $256K Reduce -99.2%
INTC Intel Corp. 0.01% 6,869 $253K Reduce -4.0%
IBM Intl Business Machines Corp. filed as INTERNATIONAL BUSINESS MACHS 0.01% 848 $251K Reduce -34.5%
OMDA Omada Health Inc. 0.01% 15,909 $251K New
COF Capital One Financial Corp. 0.01% 1,033 $250K Add +1.7%
IGM iShares Expanded Tech Sector 0.01% 1,932 $250K No change
TJX TJX Companies Inc. filed as TJX COS INC NEW 0.01% 1,563 $240K New
IYY iShares Dow Jones U.S. ETF 0.01% 1,446 $240K No change
SOXX iShares Semiconductor ETF 0.01% 771 $232K No change
SCHF Schwab Intl Equity ETF 0.01% 9,606 $231K No change
GILD Gilead Sciences Inc. 0.01% 1,829 $224K New
NEE Nextera Energy Inc. 0.01% 2,795 $224K New
BN Brookfield Corp. 0.01% 4,628 $212K New
HIMS Hims & Hers Health Inc. 0.01% 6,200 $201K No change

Portfolio Sells Q3 2025 → Q4 2025
NFLX Netflix Inc. Reduce -97.5% 0.06% −2.72
TMUS T-Mobile US Inc. Reduce -98.8% 0.03% −2.31
MELI MercadoLibre Inc. Sold out 0.00% −2.00
SPOT Spotify Technology SA Sold out 0.00% −1.90
LIN Linde PLC Reduce -99.2% 0.01% −1.87
TT Trane Technologies PLC Reduce -98.8% 0.02% −1.77
APO Apollo Global Management Inc. Sold out 0.00% −1.56
HOOD Robinhood Markets Inc. Class A Reduce -1.3% 3.44% −0.73
BKNG Booking Holdings Inc. Reduce -38.2% 1.17% −0.63
FICO Fair Isaac Corp. Reduce -71.1% 0.24% −0.46
AAPL Apple Inc. Reduce -17.2% 4.52% −0.31
UBER Uber Technologies Inc. Reduce -1.3% 2.09% −0.31
ANET Arista Networks Inc. Sold out 0.00% −0.27
META Meta Platforms Inc. Class A Reduce -3.0% 3.27% −0.27
PANW Palo Alto Networks Inc. Reduce -61.6% 0.14% −0.24
IBIT iShares Bitcoin Trust ETF Reduce -5.9% 0.51% −0.16
COST Costco Wholesale Corp. Reduce -1.7% 3.08% −0.10
WFC Wells Fargo & Co. Reduce -46.5% 0.11% −0.06
CVX Chevron Corp. Reduce -43.3% 0.08% −0.06
IT Gartner Inc. Sold out 0.00% −0.03
PG The Procter & Gamble Co. Reduce -1.1% 1.24% −0.03
ORCL Oracle Corp. Reduce -21.0% 0.03% −0.02
LLY Eli Lilly & Co. Reduce -47.1% 0.09% −0.02
CRWD CrowdStrike Holdings Inc. Class A Sold out 0.00% −0.02
FTNT Fortinet Inc. Sold out 0.00% −0.02
VOO Vanguard S&P 500 ETF Reduce -51.5% 0.02% −0.02
IDXX Idexx Laboratories Inc. Sold out 0.00% −0.01
PYPL PayPal Holdings Inc. Sold out 0.00% −0.01
DKNG Draftkings Inc. Class A Sold out 0.00% −0.01
PLTR Palantir Technologies Inc. Class A Reduce -3.4% 4.48% −0.01
KO The Coca-Cola Co. Sold out 0.00% −0.01
LNG Cheniere Energy Inc. Sold out 0.00% −0.01
BRK.B Berkshire Hathaway Inc. Class B Reduce -8.6% 0.35% −0.01
TDY Teledyne Technologies Inc. Sold out 0.00% −0.01
SYY Sysco Corp. Sold out 0.00% −0.01
DDOG Datadog Inc. Class A Sold out 0.00% −0.01
CLX Clorox Company Reduce -2.6% 0.05% −0.01
PACB Pacific Biosciences of Calif Sold out 0.00% −0.01
ADBE Adobe Inc. Reduce -39.3% 0.02% −0.01
COIN Coinbase Global Inc. Class A Reduce -0.1% 0.02% −0.01
SCHX Schwab US Large-Cap ETF Reduce -32.3% 0.02% −0.01
IBM Intl Business Machines Corp. Reduce -34.5% 0.01% −0.01
ADP Automatic Data Processing Reduce -6.8% 0.03% −0.01
QQQ Invesco QQQ Trust Series 1 Reduce -15.7% 0.05% −0.00
TMC TMC the Metals Co. Inc. Sold out 0.00% −0.00
HD Home Depot Inc. Reduce -4.8% 0.02% −0.00
URTH iShares MSCI World ETF Reduce -9.5% 0.16% −0.00
IVV iShares Core S&P 500 ETF Reduce -13.1% 0.05% −0.00
MA Mastercard Inc. Class A Reduce -17.3% 0.02% −0.00
SHOP Shopify Inc. Class A Reduce -22.0% 0.02% −0.00

Portfolio Buys Q3 2025 → Q4 2025
XBI SS SPDR S&P Biotech ETF New 2.51% +2.51
JNJ Johnson & Johnson Add +1475.0% 2.12% +2.01
EWY iShares MSCI South Korea ETF New 1.98% +1.98
AZN Astrazeneca PLC-Spons ADR New 1.95% +1.95
CAT Caterpillar Inc. Add +1833.1% 1.95% +1.87
ISCF iShares International Small Add +27.6% 4.53% +1.20
CCJ Cameco Corp. Add +4.8% 2.00% +0.35
GEV GE Vernova Inc. Add +1.1% 1.84% +0.22
GOOG Alphabet Inc. Class C Add +2.2% 0.36% +0.10
CRM Salesforce Inc. Add +152.7% 0.10% +0.06
UNP Union Pacific Corp. New 0.03% +0.03
VIG Vanguard Dividend Apprec ETF New 0.03% +0.03
MUFG Mitsubishi Ufj Finl-Spon ADR New 0.03% +0.03
HUT Hut 8 Corp. New 0.02% +0.02
AXP American Express Co. New 0.02% +0.02
ISRG Intuitive Surgical Inc. New 0.02% +0.02
EXPE Expedia Group Inc. New 0.02% +0.02
LRCX Lam Research Corp. New 0.01% +0.01
PH Parker Hannifin Corp. New 0.01% +0.01
OMDA Omada Health Inc. New 0.01% +0.01
TJX TJX Companies Inc. New 0.01% +0.01
GILD Gilead Sciences Inc. New 0.01% +0.01
NEE Nextera Energy Inc. New 0.01% +0.01
BN Brookfield Corp. New 0.01% +0.01
TMO Thermo Fisher Scientific Inc. Add +15.6% 0.04% +0.01
SPY SS SPDR S&P 500 ETF Trust-US Add +0.3% 0.10% +0.01
SCHI Schwab 5-10 Year Corporate B Add +12.4% 0.05% +0.01
ISTB iShares Core 1-5 Year Usd Bo Add +7.2% 0.06% +0.01
IGLB iShares 10+ Year Inv GR Corp. Add +12.5% 0.05% +0.01
HSBC HSBC Holdings PLC-Spons ADR Add +4.6% 0.03% +0.01
DAL Delta Air Lines Inc. Add +4.9% 0.02% +0.01
AON Aon PLC Class A Add +30.9% 0.02% +0.00
FNDX Schwab Fndmntl US LRG Co. ETF Add +16.6% 0.02% +0.00
ADI Analog Devices Inc. Add +3.1% 0.02% +0.00
CW Curtiss-Wright Corp. Add +3.3% 0.03% +0.00
COF Capital One Financial Corp. Add +1.7% 0.01% +0.00
TXN Texas Instruments Inc. Add +14.8% 0.02% +0.00
INTU Intuit Inc. Add +3.6% 0.03% +0.00
SYK Stryker Corp. Add +2.9% 0.04% +0.00
ABT Abbott Laboratories Add +3.5% 0.03% +0.00
ADSK Autodesk Inc. Add +1.5% 0.24% +0.00
MSFT Microsoft Corp. Add +0.0% 4.65% −0.05

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