2026 Q2 Portfolio Activity
In 2026 Q2, Main Street Research LLC maintained a portfolio of 161 distinct positions. The most significant new addition was ROSS STORES INC, now representing 1.51% of the total fund value. They heavily accumulated shares in BARCLAYS PLC, increasing the position by 90.5%. Conversely, Main Street Research LLC completely exited their position in WORLD GOLD TR.
Position History
hover any row below to update
Loading…
Total Positions
161
Quarter
2026 Q2
Top Holding
NVDA (6.0%)
Top 10 Concentration
48.9%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 161
Main Street Research LLC Full Holdings List — 2026 Q2
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NVDA
NVIDIA CORPORAT...
|
Technology | 5.95% | 6.30% |
#1
Prev: #1
|
4.9 |
—
|
9,277 | 1.5% |
P
S
|
630,053 | $126,067,297 |
$104.64
+107.8%
|
2017 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | ||
|
MU
MICRON TECHNOLO...
|
Technology | 5.92% | 2.14% |
#2
23
Prev: #25
|
4.4 |
—
|
-473 | -0.4% |
P
S
|
108,636 | $125,397,358 |
$325.01
+187.0%
|
2024 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | ||
|
AAPL
APPLE INC
|
Technology | 5.55% | 5.96% |
#3
1
Prev: #2
|
3.7 |
—
|
2,551 | 0.6% |
P
S
|
406,129 | $117,517,404 |
$131.08
+148.0%
|
2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | ||
|
GOOGL
ALPHABET INC
|
Communication Services | 5.35% | 5.22% |
#4
1
Prev: #3
|
3.1 |
—
|
5,161 | 1.7% |
P
S
|
316,947 | $113,267,393 | 2015 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
TSM
TAIWAN SEMICOND...
|
Technology | 5.15% | 4.39% |
#5
Prev: #5
|
3.1 |
—
|
5,270 | 2.4% |
P
S
|
228,429 | $109,090,838 | 2012 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
GLW
CORNING INC
|
Technology | 4.75% | 3.07% |
#6
6
Prev: #12
|
2.4 |
—
|
6,340 | 1.6% |
P
S
|
394,058 | $100,654,235 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
XBI
SPDR SERIES TRU...
|
Unknown | 4.31% | 4.22% |
#7
1
Prev: #6
|
2.2 |
—
|
9,275 | 1.6% |
P
S
|
576,754 | $91,271,321 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
ISCF
ISHARES TR
|
Bond/Debt | 4.14% | 4.76% |
#8
4
Prev: #4
|
2.2 |
—
|
68,729 | 3.5% |
P
S
|
2,027,356 | $87,764,241 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
ASML
ASML HLDG NV
|
Technology | 3.98% | 3.20% |
#9
2
Prev: #11
|
2.1 |
—
|
709 | 1.7% |
P
S
|
42,396 | $84,344,300 | 2012 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
AVGO
BROADCOM INC
|
Technology | 3.81% | 3.83% |
#10
2
Prev: #8
|
2.0 |
—
|
1,439 | 0.7% |
P
S
|
213,841 | $80,778,363 | 2016 Q3 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
JPM
JPMORGAN CHASE ...
|
Financial Services | 3.50% | 3.83% |
#11
4
Prev: #7
|
1.9 |
—
|
2,537 | 1.1% |
P
S
|
226,299 | $74,074,475 | 2014 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
EWY
ISHARES INC
|
ETF | 3.44% | 2.59% |
#12
3
Prev: #15
|
1.9 |
—
|
-1,009 | -0.3% |
P
S
|
360,865 | $72,858,644 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
CAT
CATERPILLAR INC
|
Industrials | 3.10% | 2.52% |
#13
5
Prev: #18
|
1.7 |
—
|
649 | 1.1% |
P
S
|
61,759 | $65,767,159 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
AMZN
AMAZON COM INC
|
Consumer Cyclical | 3.09% | 3.26% |
#14
4
Prev: #10
|
1.7 |
—
|
5,545 | 2.1% |
P
S
|
274,738 | $65,480,981 | 2012 Q3 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
GEV
GE VERNOVA INC
|
Industrials | 2.82% | 2.57% |
#15
1
Prev: #16
|
1.6 |
—
|
110 | 0.2% |
P
S
|
50,802 | $59,685,399 | 2025 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
APH
AMPHENOL CORP
|
Technology | 2.57% | 2.21% |
#16
6
Prev: #22
|
1.5 |
—
|
7,673 | 2.5% |
P
S
|
308,716 | $54,432,855 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
JNJ
JOHNSON & JOHNS...
|
Healthcare | 2.26% | 2.66% |
#17
3
Prev: #14
|
1.4 |
—
|
1,758 | 0.9% |
P
S
|
188,640 | $47,908,843 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
RY
ROYAL BK CDA
|
Financial Services | 2.22% | 2.10% |
#18
8
Prev: #26
|
1.4 |
—
|
4,568 | 2.1% |
P
S
|
227,136 | $47,010,338 | 2012 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
COST
COSTCO WHOLESAL...
|
Consumer Defensive | 2.10% | 2.68% |
#19
6
Prev: #13
|
1.3 |
—
|
1,358 | 2.9% |
P
S
|
47,497 | $44,432,468 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
BHP
BHP BILLITON LI...
|
Basic Materials | 2.08% | 2.20% |
#20
3
Prev: #23
|
1.3 |
—
|
8,839 | 1.7% |
P
S
|
528,051 | $43,991,929 | 2016 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
BCS
BARCLAYS PLC
|
Financial Services | 2.06% | 1.05% |
#21
10
Prev: #31
|
3.8 |
—
|
770,519 | 90.5% |
P
S
|
1,621,490 | $43,553,224 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
META
META PLATFORMS ...
|
Communication Services | 1.92% | 2.36% |
#22
1
Prev: #21
|
1.3 |
—
|
1,225 | 1.7% |
P
S
|
72,187 | $40,662,490 | 2013 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
KEYS
KEYSIGHT TECHNO...
|
Technology | 1.90% | 1.86% |
#23
4
Prev: #27
|
1.3 |
—
|
2,171 | 1.9% |
P
S
|
115,108 | $40,295,858 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
CCJ
CAMECO CORP
|
Energy | 1.88% | 2.46% |
#24
4
Prev: #20
|
1.3 |
—
|
2,452 | 0.6% |
P
S
|
391,529 | $39,881,144 | 2018 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
WMT
WALMART INC
|
Consumer Defensive | 1.86% | 2.49% |
#25
6
Prev: #19
|
1.2 |
—
|
3,781 | 1.1% |
P
S
|
348,650 | $39,488,132 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
AZNCF
ASTRAZENECA PLC
|
Unknown | 1.77% | 2.19% |
#26
2
Prev: #24
|
1.2 |
—
|
6,773 | 3.6% |
P
S
|
197,417 | $37,434,212 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
ROST
ROSS STORES INC
|
Consumer Cyclical | 1.51% | — |
#27
Prev: #—
|
4.1 |
—
|
150,755 | — |
NEW
|
150,755 | $32,088,202 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
FTI
TECHNIPFMC PLC
|
Energy | 1.29% | — |
#28
Prev: #—
|
4.0 |
—
|
413,657 | — |
NEW
|
413,657 | $27,425,459 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
MSFT
MICROSOFT CORP
|
Technology | 1.22% | 1.45% |
#29
1
Prev: #28
|
1.0 |
—
|
1,640 | 2.4% |
P
S
|
69,182 | $25,806,278 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
PG
PROCTER & GAMBL...
|
Consumer Defensive | 1.05% | 1.27% |
#30
Prev: #30
|
0.9 |
—
|
-554 | -0.4% |
P
S
|
151,073 | $22,153,275 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
MCK
MCKESSON CORP
|
Healthcare | 1.02% | 3.41% |
#31
22
Prev: #9
|
0.4 |
—
|
-39,299 | -58.0% |
P
S
|
28,475 | $21,516,028 | 2013 Q3 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
FICO
FAIR ISAAC CORP
|
Technology | 0.54% | 0.53% |
#32
Prev: #32
|
2.2 |
—
|
1,116 | 13.2% |
P
S
|
9,580 | $11,445,992 | 2011 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
GOOG
ALPHABET INC
|
Communication Services | 0.38% | 0.39% |
#33
1
Prev: #34
|
0.7 |
—
|
-730 | -3.1% |
P
S
|
22,707 | $8,022,970 | 2013 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
PANW
PALO ALTO NETWO...
|
Technology | 0.38% | 0.32% |
#34
2
Prev: #36
|
0.2 |
—
|
-10,681 | -31.4% |
P
S
|
23,343 | $7,960,430 | 2022 Q3 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
BRK/B
BERKSHIRE HATHA...
|
Financial Services | 0.28% | 0.33% |
#35
Prev: #35
|
0.6 |
—
|
2 | 0.0% |
P
S
|
11,980 | $5,994,672 | 2011 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
ANET
ARISTA NETWORKS...
|
Technology | 0.28% | 0.25% |
#36
4
Prev: #40
|
0.6 |
—
|
-44 | -0.1% |
P
S
|
34,937 | $5,935,098 | 2022 Q3 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
TSLA
TESLA INC
|
Consumer Cyclical | 0.26% | 0.27% |
#37
1
Prev: #38
|
0.6 |
—
|
606 | 4.9% |
P
S
|
12,943 | $5,444,026 | 2015 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
SCHW
SCHWAB CHARLES ...
|
Financial Services | 0.20% | 0.25% |
#38
1
Prev: #39
|
0.6 |
—
|
-473 | -1.0% |
P
S
|
45,887 | $4,234,030 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
WFC
WELLS FARGO & C...
|
Financial Services | 0.19% | 0.22% |
#39
3
Prev: #42
|
0.6 |
—
|
1,660 | 3.5% |
P
S
|
48,542 | $4,011,511 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
BRK/A
BERKSHIRE HATHA...
|
Financial Services | 0.18% | 0.21% |
#40
3
Prev: #43
|
1.1 |
—
|
no change | no change |
P
S
|
5 | $3,744,250 | 2011 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
IXUS
ISHARES TR
|
ETF | 0.18% | 0.19% |
#41
5
Prev: #46
|
0.6 |
—
|
490 | 1.3% |
P
S
|
39,073 | $3,729,127 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
LLY
ELI LILLY & CO
|
Healthcare | 0.16% | 0.16% |
#42
6
Prev: #48
|
0.6 |
—
|
-162 | -5.6% |
P
S
|
2,746 | $3,293,389 | 2013 Q1 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
V
VISA INC
|
Financial Services | 0.15% | 0.18% |
#43
4
Prev: #47
|
0.6 |
—
|
-877 | -8.6% |
P
S
|
9,369 | $3,214,454 | 2013 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
XOM
EXXON MOBIL COR...
|
Energy | 0.14% | 0.24% |
#44
3
Prev: #41
|
0.6 |
—
|
-1,487 | -6.2% |
P
S
|
22,437 | $3,067,587 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
ADSK
AUTODESK INC
|
Technology | 0.13% | 0.20% |
#45
Prev: #45
|
0.6 |
—
|
-163 | -1.1% |
P
S
|
14,240 | $2,768,541 | 2014 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
URTH
ISHARES INC
|
ETF | 0.13% | 0.15% |
#46
3
Prev: #49
|
0.6 |
—
|
-1,231 | -8.4% |
P
S
|
13,511 | $2,737,869 | 2023 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
CVX
CHEVRON CORPORA...
|
Energy | 0.13% | 0.20% |
#47
3
Prev: #44
|
0.6 |
—
|
-771 | -4.6% |
P
S
|
16,080 | $2,665,488 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
SPY
STATE STR SPDR ...
|
ETF | 0.12% | 0.12% |
#48
3
Prev: #51
|
2.0 |
—
|
222 | 6.8% |
P
S
|
3,485 | $2,602,493 | 2016 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
ABBV
ABBVIE INC
|
Healthcare | 0.12% | 0.13% |
#49
1
Prev: #50
|
0.5 |
—
|
-537 | -5.2% |
P
S
|
9,721 | $2,446,086 | 2013 Q2 | 13F Filing | 2026-06-30 | 2026-07-29 | |||
|
MCD
MCDONALDS CORP
|
Consumer Cyclical | 0.11% | 0.28% |
#50
13
Prev: #37
|
0.0 |
—
|
-6,570 | -42.4% |
P
S
|
8,913 | $2,409,244 | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-07-29 |
Showing 1-50 of 161 holdings