Main Street Research LLC

CIK 1513211 · View on SEC EDGAR ↗

Portfolio value
$2.1B
#1,454 of 9,443 by 13F value · top 15.4%
Positions
140
As of
June 30, 2026

Portfolio value QoQ: +23.3% 13F does not disclose cash

Top 10 holdings weight
48.91%
Top 25 holdings weight
85.71%
Positions above 1%
31
Effective number of positions
28.4

Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)

Turnover Q2 2026: 5.96% Est. buys $114,263,216 · sells $116,047,896

Median holding: 5.0 quarters Tracked Q4 2024–Q2 2026 · 70.0% still held

New positions
13
Increased
67
Decreased
51
Closed
21
On this page

Performance vs S&P 500

Tracked Q4 2024–Q2 2026
+39.9%
S&P 500 total return (same window)
+28.1%
Excess return
+11.8%

Annualized: +25.2% · S&P 500: +18.0%

Approximates a buy-and-hold portfolio built from quarterly SEC 13F snapshots. Excludes cash, short positions, options/derivatives, and non-13(f) securities — reflects the disclosed long-equity book only, not total fund AUM. SEC filing lag is up to 45 days; this is not a real-time-copyable timing.

Priceable coverage: 92.0% · Options excluded: 0.0%

Sector breakdown

Technology
33.3%
Industrials
15.5%
Retail
8.6%
Financials
8.1%
Communication Services
7.7%
Healthcare
5.5%
Energy
3.5%
Materials
2.1%
Consumer products
1.2%
Consumer Discretionary
0.4%
Financial Services
0.4%
Communications
0.3%
Consumer Staples
0.1%
Telecommunication
0.0%
Other/Unmapped
13.3%

Full portfolio 140 positions

Type Streak 8Q trend
NVDA NVIDIA Corporation - Common Stock $126,067,297 5.95% 630,053 $17,804,003 Up ×2
MU Micron Technology, Inc. - Common Stock $125,397,358 5.92% 108,636 $88,536,019 Down ×1
AAPL Apple Inc. - Common Stock $117,517,404 5.55% 406,129 $15,093,231 Up ×2
GOOGL Alphabet Inc. - Class A Common Stock $113,267,393 5.35% 316,947 $23,610,245 Up ×2
TSM Taiwan Semiconductor Manufacturing Company Ltd. $109,090,838 5.15% 228,429 $33,674,254 Up ×2
GLW Corning Incorporated Common Stock $100,654,235 4.75% 394,058 $47,936,219 Up ×1
XBI XBI $91,271,321 4.31% 576,754 $18,787,228 Up ×2
ISCF $87,764,241 4.14% 2,027,356 $5,913,219 Up ×3
ASML ASML Holding N.V. - New York Registry Shares $84,344,300 3.98% 42,396 $29,282,860 Up ×2
AVGO Broadcom Inc. - Common Stock $80,778,363 3.81% 213,841 $15,037,893 Up ×2
JPM JP Morgan Chase & Co. Common Stock $74,074,475 3.50% 226,299 $8,252,547 Up ×2
EWY $72,858,644 3.44% 360,865 $28,344,523 Down ×1
CAT Caterpillar, Inc. Common Stock $65,767,159 3.10% 61,759 $22,473,168 Up ×4
AMZN Amazon.com, Inc. - Common Stock $65,480,981 3.09% 274,738 $9,416,220 Up ×2
GEV GE Vernova Inc. Common Stock $59,685,399 2.82% 50,802 $15,436,308 Up ×4
APH Amphenol Corporation Common Stock $54,432,855 2.57% 308,716 $16,396,098 Up ×2
JNJ Johnson & Johnson Common Stock $47,908,843 2.26% 188,640 $2,227,453 Up ×4
RY Royal Bank Of Canada Common Stock $47,010,338 2.22% 227,136 $11,003,287 Up ×1
COST Costco Wholesale Corporation - Common Stock $44,432,468 2.10% 47,497 $-1,541,812 Up ×1
BHP BHP Group Limited American Depositary Shares (Each representing two Ordinary Shares) $43,991,929 2.08% 528,051 $6,224,448 Up ×1
BCS Barclays PLC Common Stock $43,553,224 2.06% 1,621,490 $25,546,678 Up ×1
META Meta Platforms, Inc. - Class A Common Stock $40,662,490 1.92% 72,187 $62,800 Up ×1
KEYS Keysight Technologies Inc. Common Stock $40,295,858 1.90% 115,108 $8,405,837 Up ×1
CCJ Cameco Corporation Common Stock $39,881,144 1.88% 391,529 $-2,376,509 Up ×3
WMT Walmart Inc. - Common Stock $39,488,132 1.86% 348,650 $-3,372,132 Up ×2
AZN AstraZeneca PLC - American Depositary Shares $37,434,212 1.77% 197,417 $-164,598 Up ×1
ROST Ross Stores, Inc. - Common Stock $32,088,202 1.51% 150,755 Up ×1
FTI TechnipFMC plc Ordinary Share $27,425,459 1.29% 413,657 Up ×1
MSFT Microsoft Corporation - Common Stock $25,806,278 1.22% 69,182 $804,355 Up ×1
PG Procter & Gamble Company (The) Common Stock $22,153,275 1.05% 151,073 $252,207 Down ×1
MCK McKesson Corporation Common Stock $21,516,028 1.02% 28,475 $-37,133,213 Down ×1
FICO Fair Isaac Corporation Common Stock $11,445,992 0.54% 9,580 $2,410,333 Up ×2
GOOG Alphabet Inc. - Class C Capital Stock $8,022,970 0.38% 22,707 $1,299,755 Down ×1
PANW Palo Alto Networks, Inc. - Common Stock $7,960,430 0.38% 23,343 $2,505,702 Down ×1
BRKB $5,994,672 0.28% 11,980 $254,814 Up ×1
ANET Arista Networks, Inc. Common Stock $5,935,098 0.28% 34,937 $1,640,131 Down ×1
TSLA Tesla, Inc. - Common Stock $5,444,026 0.26% 12,943 $857,569 Up ×1
SCHW Charles Schwab Corporation (The) Common Stock $4,234,030 0.20% 45,887 $-122,920 Down ×1
WFC Wells Fargo & Company Common Stock $4,011,511 0.19% 48,542 $279,235 Up ×2
BRKA $3,744,250 0.18% 5 $153,550
IXUS iShares Core MSCI Total International Stock ETF $3,729,127 0.18% 39,073 $386,296 Up ×2
LLY Eli Lilly and Company Common Stock $3,293,389 0.16% 2,746 $619,026 Down ×1
V Visa Inc. $3,214,454 0.15% 9,369 $117,664 Down ×3
XOM Exxon Mobil Corporation Common Stock $3,067,587 0.14% 22,437 $-991,359 Down ×1
ADSK Autodesk, Inc. - Common Stock $2,768,541 0.13% 14,240 $-679,537 Down ×1
URTH $2,737,869 0.13% 13,511 $84,014 Down ×4
CVX Chevron Corporation Common Stock $2,665,488 0.13% 16,080 $-821,068 Down ×1
SPY SPY $2,602,493 0.12% 3,485 $480,662 Up ×3
ABBV AbbVie Inc. Common Stock $2,446,086 0.12% 9,721 $215,049 Down ×1
MCD McDonald's Corporation Common Stock $2,409,244 0.11% 8,913 $-2,402,614 Down ×5
AMD Advanced Micro Devices, Inc. - Common Stock $1,921,650 0.09% 3,308 $1,281,863 Up ×1
IVV $1,355,502 0.06% 1,810 $-312,561 Down ×1
PLTR Palantir Technologies Inc. - Class A Common Stock $1,335,171 0.06% 11,444 $-23,188,232 Down ×5
MMM 3M Company Common Stock $1,232,135 0.06% 7,610 $89,175 Down ×3
ISTB iShares Core 1-5 Year USD Bond ETF $1,186,564 0.06% 24,592 $20,713 Up ×5
CSCO Cisco Systems, Inc. - Common Stock $1,137,194 0.05% 9,682 $356,907 Down ×1
QQQ Invesco QQQ Trust, Series 1 $1,127,086 0.05% 1,531 $106,323 Down ×1
RTX RTX Corporation Common Stock $1,091,366 0.05% 5,752 $-78,805 Down ×1
MRK Merck & Company, Inc. Common Stock (new) $1,066,293 0.05% 8,298 $-79,002 Down ×1
TXN Texas Instruments Incorporated - Common Stock $1,061,154 0.05% 3,560 $376,406 Up ×4
SCHI $1,052,488 0.05% 46,488 $47,174 Up ×5
INTC Intel Corporation - Common Stock $1,026,281 0.05% 7,350 $765,076 Up ×1
IGLB $986,839 0.05% 19,721 $56,227 Up ×5
PHM PulteGroup, Inc. Common Stock $980,365 0.05% 7,145 $112,168 Down ×1
ON ON Semiconductor Corporation - Common Stock $979,718 0.05% 10,363 $338,846 Up ×1
CRM Salesforce, Inc. Common Stock $908,941 0.04% 5,802 $-383,562 Down ×1
CRUS Cirrus Logic, Inc. - Common Stock $881,674 0.04% 5,936 $52,423 Up ×1
LRCX Lam Research Corporation - Common Stock $873,695 0.04% 2,016 $448,911 Up ×2
CLX Clorox Company (The) Common Stock $852,661 0.04% 8,934 $-135,658 Down ×1
GS Goldman Sachs Group, Inc. (The) Common Stock $820,221 0.04% 811 $80,826 Down ×1
C Citigroup, Inc. Common Stock $812,188 0.04% 5,803 $185,484 Up ×2
DIA $804,919 0.04% 1,541 $109,313 Up ×2
CW Curtiss-Wright Corporation Common Stock $786,555 0.04% 1,038 $97,262 Up ×3
UBER Uber Technologies, Inc. Common Stock $779,761 0.04% 10,806 $-46,787 Down ×3
CL Colgate-Palmolive Company Common Stock $769,195 0.04% 8,390 $131,334 Up ×2
VOO $758,581 0.04% 1,104 $-37,614 Down ×1
HSBC HSBC Holdings, plc. Common Stock $739,039 0.03% 7,772 $101,144 Up ×4
BAC Bank of America Corporation Common Stock $676,296 0.03% 11,869 $94,075 Down ×1
DHI D.R. Horton, Inc. Common Stock $663,736 0.03% 4,075 $141,202 Up ×1
UNP Union Pacific Corporation Common Stock $656,336 0.03% 2,413 $-345,442 Down ×1
MUFG Mitsubishi UFJ Financial Group, Inc. Common Stock $650,821 0.03% 32,721 $134,118 Up ×2
FTNT Fortinet, Inc. - Common Stock $647,355 0.03% 4,214 $314,346 Up ×1
BX Blackstone Inc. Common Stock $592,586 0.03% 5,036 $-18,816 Down ×1
DAL Delta Air Lines, Inc. Common Stock $586,593 0.03% 6,263 $248,143 Up ×3
CRWD CrowdStrike Holdings, Inc. - Class A Common Stock $567,776 0.03% 744 $322,599 Up ×1
ADI Analog Devices, Inc. - Common Stock $554,052 0.03% 1,395 $79,705 Down ×1
XLK XLK $533,456 0.03% 2,800 $161,336
EBAY eBay Inc. - Common Stock $529,583 0.02% 4,739 $149,574 Up ×2
NTES NetEase, Inc. - American Depositary Shares, each representing 5 ordinary shares $523,452 0.02% 4,085 $66,177
ORCL Oracle Corporation Common Stock $513,649 0.02% 3,505 $-786 Up ×2
SOXX SOXX $494,273 0.02% 771 $240,749
KLAC KLA Corporation - Common Stock $483,943 0.02% 1,604 $223,326 Up ×1
ADP Automatic Data Processing, Inc. - Common Stock $468,503 0.02% 2,092 $15,005 Down ×3
TT Trane Technologies plc $465,620 0.02% 948 $70,967 Up ×1
VTI $464,400 0.02% 1,255 $50,876 Down ×4
IGM $460,641 0.02% 2,816 $231,680 Up ×1
HUT Hut 8 Corp. - Common Stock $460,164 0.02% 3,986
PEP PepsiCo, Inc. - Common Stock $455,565 0.02% 3,365 $-122,446 Down ×1
LEN Lennar Corporation Class A Common Stock $405,667 0.02% 4,483 $66,644 Up ×1
TMO Thermo Fisher Scientific Inc Common Stock $401,088 0.02% 800 $-41,289 Down ×2

Conviction holdings

Positions increased for 3+ consecutive quarters.

Share counts are as reported in 13F filings (not split-adjusted)

Security Value % of portfolio Streak
ISCF $87,764,241 4.14% up ×3
CAT $65,767,159 3.10% up ×4
GEV $59,685,399 2.82% up ×4
JNJ $47,908,843 2.26% up ×4
CCJ $39,881,144 1.88% up ×3
SPY $2,602,493 0.12% up ×3
ISTB $1,186,564 0.06% up ×5
TXN $1,061,154 0.05% up ×4
SCHI $1,052,488 0.05% up ×5
IGLB $986,839 0.05% up ×5
CW $786,555 0.04% up ×3
HSBC $739,039 0.03% up ×4
DAL $586,593 0.03% up ×3

Biggest new bets

New positions opened this quarter, largest first.

Security Value Shares % of portfolio
ROST $32,088,202 150,755 1.51%
FTI $27,425,459 413,657 1.29%
HUT $460,164 3,986 0.02%
UAL $318,761 2,344 0.02%
VEA $291,128 4,086 0.01%
MNST $285,188 2,967 0.01%
IUSG $269,909 1,435 0.01%
IUSV $261,166 2,371 0.01%
QCOM $254,009 1,375 0.01%
ABEO $238,017 38,514 0.01%
HIMS $214,954 6,200 0.01%
KO $207,903 2,558 0.01%
DDOG $205,945 791 0.01%

Top movers (QoQ)

Security Action Shares Δ Value Δ
MU Trimmed -473 +$88.5M
GLW Bought more +6K +$47.9M
MCK Trimmed -39K -$37.1M
TSM Bought more +5K +$33.7M
ASML Bought more +709 +$29.3M
EWY Trimmed -1K +$28.3M
BCS Bought more +771K +$25.5M
GOOGL Bought more +5K +$23.6M
CAT Bought more +649 +$22.5M
XBI Bought more +9K +$18.8M

1 position hidden (data completeness check)

Exited positions

Includes corporate events (mergers, delistings) — not all exits are sells

Closed positions reflect 13F reporting changes; for index managers these are often mechanical (delisting, M&A, index rebalancing), not active decisions.

SecurityQuarter Shares before Value before Price since exit
IWM March 31, 2025 282,358 $62,389,871 No longer tracked
GLDM June 30, 2026 469,451 $43,513,413 No longer tracked
MELI Dec. 31, 2025 15,833 $37,000,771 -3.8%
SAP Sept. 30, 2025 120,723 $36,711,864 -19.4%
SPOT Dec. 31, 2025 50,422 $35,194,556 -9.2%
PH June 30, 2025 54,903 $33,373,036 44.9%
IR March 31, 2025 365,501 $33,063,240 0.8%
RF March 31, 2025 1,388,068 $32,988,681 40.4%
CB March 31, 2025 118,621 $32,882,795 13.7%
ISRG Sept. 30, 2025 59,513 $32,339,959 -16.5%
ANET March 31, 2025 285,740 $31,582,842 143.1%
CEG March 31, 2025 140,786 $31,495,272 35.2%
FTNT June 30, 2025 318,947 $30,701,838 41.3%
IBN March 31, 2026 1,022,131 $30,459,504 15.3%
CHKP Sept. 30, 2025 136,759 $30,257,929 -37.4%
APO Dec. 31, 2025 217,067 $28,928,519 -9.1%
BABA Sept. 30, 2025 226,019 $26,078,229 -31.6%
BKNG March 31, 2026 3,807 $20,387,741 22.9%
MS June 30, 2025 134,444 $15,685,581 50.3%
AZN June 30, 2025 202,512 $14,884,632 136.8%
GS June 30, 2025 25,624 $13,998,135 44.7%
CRH June 30, 2025 153,597 $13,511,928 3.0%
INTU March 31, 2025 21,485 $13,503,323 -41.3%
GD March 31, 2025 50,958 $13,426,792 42.3%
IBIT June 30, 2025 280,632 $13,136,384
IBIT June 30, 2026 196,085 $7,533,586
AMD March 31, 2025 60,445 $7,301,152 358.2%
AMAT March 31, 2025 40,642 $6,609,536 240.5%
ANET Dec. 31, 2025 34,884 $5,082,948 43.8%
DIS June 30, 2026 10,730 $1,034,182 11.3%
NVO June 30, 2025 11,338 $800,250 -32.3%
GLD June 30, 2026 1,806 $777,104 No longer tracked
IT Dec. 31, 2025 2,153 $565,959 -23.5%
VIG March 31, 2026 2,361 $518,901 No longer tracked
ITOT March 31, 2026 3,405 $506,289 No longer tracked
RELX Sept. 30, 2025 7,666 $416,570 -25.7%
HUT March 31, 2026 8,986 $412,817 88.2%
CRWD Dec. 31, 2025 798 $391,323 -60.1%
ISRG June 30, 2026 839 $386,771 -6.1%
BSX June 30, 2026 5,993 $376,061 15.8%
FTNT Dec. 31, 2025 4,190 $352,295 88.2%
VEEV March 31, 2025 1,600 $336,400 6.9%
ACN June 30, 2026 1,683 $333,722 46.7%
USFR June 30, 2025 6,561 $330,231 No longer tracked
INTU June 30, 2026 712 $308,039 38.2%
TRMB March 31, 2026 3,762 $294,753 -8.8%
APO March 31, 2025 1,775 $293,159 -3.9%
RMD March 31, 2025 1,208 $276,258 2.7%
DAL March 31, 2025 4,545 $274,973 88.3%
COIN June 30, 2026 1,550 $270,646 28.2%
IDXX Dec. 31, 2025 411 $262,584 -19.2%
PYPL Dec. 31, 2025 3,854 $258,449 6.6%
COP June 30, 2026 1,950 $257,400 30.3%
NFLX June 30, 2026 2,673 $257,009 11.4%
LIN March 31, 2026 600 $255,834 -1.6%
IBM March 31, 2026 848 $251,186 -3.6%
SCHX March 31, 2025 10,689 $247,770 No longer tracked
MA June 30, 2026 493 $246,332 12.0%
ADBE June 30, 2026 1,005 $244,295 33.1%
DKNG Dec. 31, 2025 6,500 $243,100 -27.5%
NKE March 31, 2025 3,147 $239,344 -36.1%
KO Dec. 31, 2025 3,597 $238,565 29.7%
LNG Dec. 31, 2025 1,008 $236,860 43.8%
NEE March 31, 2025 3,293 $236,075 19.9%
BX June 30, 2025 1,682 $235,110 -4.2%
AXP June 30, 2026 773 $233,817 -0.9%
QCOM June 30, 2025 1,485 $228,111 1.1%
HD June 30, 2026 686 $225,692 -4.8%
TMUS June 30, 2026 1,070 $224,732 9.1%
GILD March 31, 2026 1,829 $224,491 3.9%
NOW Sept. 30, 2025 216 $222,065 -29.5%
VLO March 31, 2025 1,811 $222,010 162.0%
CI March 31, 2025 785 $216,880 -15.9%
COF June 30, 2026 1,180 $215,267 8.5%
BN March 31, 2026 4,628 $212,379 3.7%
TDY Dec. 31, 2025 362 $212,146 23.9%
NEE June 30, 2026 2,266 $210,466 -3.2%
IYY March 31, 2025 1,446 $206,908 No longer tracked
DIS March 31, 2025 1,830 $204,879 8.5%
JAAA June 30, 2025 4,034 $204,540 No longer tracked
TDY June 30, 2026 338 $204,493 -5.1%
SYY Dec. 31, 2025 2,475 $203,792 14.1%
VRT June 30, 2026 810 $202,970 -21.1%
COF March 31, 2025 1,137 $202,750 21.4%
DDOG Dec. 31, 2025 1,416 $201,638 69.0%
HIMS March 31, 2026 6,200 $201,314 56.1%
OMDA June 30, 2026 15,909 $199,976 7.7%
PACB Dec. 31, 2025 142,100 $181,888 -33.4%
LOCL June 30, 2025 46,394 $95,572 -55.6%
SAN March 31, 2025 17,739 $80,890 118.3%
TMC Dec. 31, 2025 10,000 $63,700 -31.2%