We are live on ! Find out more
MSR

Main Street Research Portfolio holdings

AUM $2.12B
1-Year Est. Return 67.44%
This Fund
S&P 500
This Quarter Est. Return
+37.04%
1 Year Est. Return
+67.44%
3 Year Est. Return
+232.37%
5 Year Est. Return
+381.46%
10 Year Est. Return
+1,630.85%
AUM
$2.12B
AUM Growth
+$400M
Cap. Flow
-$6.17M
Cap. Flow %
-0.29%
Top 10 Hldgs %
48.91%
Holding
161
New
13
Increased
64
Reduced
53
Closed
21

Top Buys

Rank Stock Value
1
ROST icon
Ross Stores
ROST
+$33.9M
2
FTI icon
TechnipFMC
FTI
+$29.3M
3
BCS icon
Barclays
BCS
+$18.6M
4
ISCF icon
iShares International Small Cap Equity Factor ETF
ISCF
+$3.04M
5
TSM icon
TSMC
TSM
+$2.14M

Top Sells

Rank Stock Value
1
GLDM icon
SPDR Gold MiniShares Trust
GLDM
+$43.5M
2
MCK icon
McKesson
MCK
+$31.2M
3
PLTR icon
Palantir
PLTR
+$21.3M
4
IBIT icon
iShares Bitcoin Trust
IBIT
+$7.53M
5
PANW icon
Palo Alto Networks
PANW
+$2.44M

Sector Composition

Rank Sector Weight
1 Technology 42.89%
2 Financials 9.02%
3 Communication Services 7.71%
4 Industrials 6.2%
5 Healthcare 5.5%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
NVDA icon
1
NVIDIA
NVDA
$4.72T
$126M 5.95%
630,053
+9,277
+1% +$1.91M
MU icon
2
Micron Technology
MU
$988B
$125M 5.92%
108,636
-473
-0.4% -$355K
AAPL icon
3
Apple
AAPL
$4.9T
$118M 5.55%
406,129
+2,551
+0.6% +$730K
GOOGL icon
4
Alphabet (Google) Class A
GOOGL
$4.08T
$113M 5.35%
316,947
+5,161
+2% +$1.86M
TSM icon
5
TSMC
TSM
$2.09T
$109M 5.15%
228,429
+5,270
+2% +$2.14M
GLW icon
6
Corning
GLW
$116B
$101M 4.75%
394,058
+6,340
+2% +$1.15M
XBI icon
7
State Street SPDR S&P Biotech ETF
XBI
$10.3B
$91.3M 4.31%
576,754
+9,275
+2% +$1.25M
ISCF icon
8
iShares International Small Cap Equity Factor ETF
ISCF
$662M
$87.8M 4.14%
2,027,356
+68,729
+4% +$3.04M
ASML icon
9
ASML
ASML
$634B
$84.3M 3.98%
42,396
+709
+2% +$1.13M
AVGO icon
10
Broadcom
AVGO
$1.85T
$80.8M 3.81%
213,841
+1,439
+0.7% +$577K
JPM icon
11
JPMorgan Chase
JPM
$933B
$74.1M 3.5%
226,299
+2,537
+1% +$788K
EWY icon
12
iShares MSCI South Korea ETF
EWY
$22.5B
$72.9M 3.44%
360,865
-1,009
-0.3% -$178K
CAT icon
13
Caterpillar
CAT
$373B
$65.8M 3.1%
61,759
+649
+1% +$570K
AMZN icon
14
Amazon
AMZN
$2.53T
$65.5M 3.09%
274,738
+5,545
+2% +$1.39M
GEV icon
15
GE Vernova
GEV
$262B
$59.7M 2.82%
50,802
+110
+0.2% +$112K
APH icon
16
Amphenol
APH
$197B
$54.4M 2.57%
308,716
+7,673
+3% +$1.11M
JNJ icon
17
Johnson & Johnson
JNJ
$617B
$47.9M 2.26%
188,640
+1,758
+0.9% +$410K
RY icon
18
Royal Bank of Canada
RY
$292B
$47M 2.22%
227,136
+4,568
+2% +$847K
COST icon
19
Costco
COST
$423B
$44.4M 2.1%
47,497
+1,358
+3% +$1.35M
BHP icon
20
BHP
BHP
$218B
$44M 2.08%
528,051
+8,839
+2% +$734K
BCS icon
21
Barclays
BCS
$93.4B
$43.6M 2.06%
1,621,490
+770,519
+91% +$18.6M
META icon
22
Meta Platforms (Facebook)
META
$1.37T
$40.7M 1.92%
72,187
+1,225
+2% +$749K
KEYS icon
23
Keysight
KEYS
$53.4B
$40.3M 1.9%
115,108
+2,171
+2% +$740K
CCJ icon
24
Cameco
CCJ
$38.4B
$39.9M 1.88%
391,529
+2,452
+0.6% +$275K
WMT icon
25
Walmart Inc
WMT
$884B
$39.5M 1.86%
348,650
+3,781
+1% +$469K
1
2 3 4 5

Similar funds

GS
Gilead Sciences Foster City, California $2.12B AUM 143.53% 1-Year Est. Return
BCM
Basswood Capital Management New York $2.12B AUM 19.53% 1-Year Est. Return
EF
Empirical Finance Havertown, Pennsylvania $2.13B AUM 29.56% 1-Year Est. Return
IVAV
Index Venture Associates VI St. Helier, Channel Islands, Jersey $2.11B AUM 13.76% 1-Year Est. Return
HJGA
Hardman Johnston Global Advisors Stamford, Connecticut $2.1B AUM 41.89% 1-Year Est. Return
CF
Centaurus Financial Anaheim, California $2.1B AUM 21.28% 1-Year Est. Return
BWC
Blue Whale Capital London, United Kingdom $2.1B AUM 97.03% 1-Year Est. Return
SFS
Strategic Financial Services Utica, New York $2.1B AUM 19.14% 1-Year Est. Return

Main Street Research's Q2 2026 Portfolio in Review

As of Q2 2026, Main Street Research held 161 positions worth $2.12B, up 23% from $1.72B the previous quarter. Its ten largest holdings account for 49% of the portfolio.

Main Street Research's Q2 2026 filing shows 13 new, 64 increased, 53 reduced and 21 closed positions. Its largest new stake was Ross Stores: 150,755 shares worth $32.1M. The largest sale was SPDR Gold MiniShares Trust, an estimated $43.5M.

By sector, the portfolio is most concentrated in Technology at 43% of assets, up from 38% a quarter earlier, followed by Financials and Communication Services.

  • Main Street Research's largest Q2 2026 buy was Ross Stores: 150,755 shares worth $32.1M.
  • Main Street Research added most to Barclays in Q2 2026, an estimated $18.6M increase.
  • Main Street Research's biggest Q2 2026 reduction was McKesson, cutting an estimated $31.2M.
  • Main Street Research fully exited SPDR Gold MiniShares Trust in Q2 2026, selling an estimated $43.5M.
  • Main Street Research's ten largest holdings make up 49% of its $2.12B portfolio in Q2 2026.
  • Main Street Research opened 13 new positions and closed 21 in Q2 2026.
  • Main Street Research's portfolio value rose 23% quarter-over-quarter to $2.12B.

Based on Main Street Research's 13F filing for Q2 2026, filed 29 Jul 2026.