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MSR

Main Street Research Portfolio holdings

AUM $2.12B
1-Year Est. Return 67.44%
This Fund
S&P 500
This Quarter Est. Return
+4.75%
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
$1.75B
AUM Growth
-$103M
Cap. Flow
-$128M
Cap. Flow %
-7.35%
Top 10 Hldgs %
45.32%
Holding
146
New
17
Increased
25
Reduced
77
Closed
17

Top Buys

Rank Stock Value
1
XBI icon
State Street SPDR S&P Biotech ETF
XBI
+$41.3M
2
JNJ icon
Johnson & Johnson
JNJ
+$33.2M
3
AZN icon
AstraZeneca
AZN
+$32.6M
4
EWY icon
iShares MSCI South Korea ETF
EWY
+$32.5M
5
CAT icon
Caterpillar
CAT
+$31.4M

Top Sells

Rank Stock Value
1
NFLX icon
Netflix
NFLX
+$45.1M
2
TMUS icon
T-Mobile US
TMUS
+$37.8M
3
MELI icon
Mercado Libre
MELI
+$37M
4
SPOT icon
Spotify
SPOT
+$35.2M
5
TT icon
Trane Technologies
TT
+$32.1M

Sector Composition

Rank Sector Weight
1 Technology 35.88%
2 Financials 16.32%
3 Communication Services 9.11%
4 Healthcare 7.73%
5 Consumer Staples 6.59%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CL icon
76
Colgate-Palmolive
CL
$74.1B
$523K 0.03%
6,618
-81
-1% -$6.35K
VIG icon
77
Vanguard Dividend Appreciation ETF
VIG
$114B
$519K 0.03%
+2,361
New +$516K
INTU icon
78
Intuit
INTU
$88.1B
$516K 0.03%
779
+27
+4% +$17.8K
VTI icon
79
Vanguard Morningstar Total Stock Market ETF
VTI
$680B
$516K 0.03%
1,538
-114
-7% -$37.9K
ITOT icon
80
iShares Core S&P Total US Stock Market ETF
ITOT
$97.1B
$506K 0.03%
3,405
– –
CW icon
81
Curtiss-Wright
CW
$26.4B
$506K 0.03%
917
+29
+3% +$16.2K
MUFG icon
82
Mitsubishi UFJ Financial
MUFG
$254B
$479K 0.03%
+30,205
New +$467K
ABT icon
83
Abbott
ABT
$187B
$458K 0.03%
3,654
+123
+3% +$15.7K
XYL icon
84
Xylem
XYL
$28.2B
$450K 0.03%
3,305
-8
-0.2% -$1.15K
TMUS icon
85
T-Mobile US
TMUS
$193B
$439K 0.03%
2,162
-178,159
-99% -$37.8M
HUT
86
Hut 8
HUT
$11.2B
$413K 0.02%
+8,986
New +$396K
TT icon
87
Trane Technologies
TT
$105B
$369K 0.02%
947
-77,663
-99% -$32.1M
IWF icon
88
iShares Russell 1000 Growth ETF
IWF
$127B
$363K 0.02%
3,064
– –
COIN icon
89
Coinbase
COIN
$38.4B
$351K 0.02%
1,551
-2
-0.1% -$596
T icon
90
AT&T
T
$162B
$346K 0.02%
13,914
-129
-0.9% -$3.27K
ADI icon
91
Analog Devices
ADI
$184B
$338K 0.02%
1,248
+38
+3% +$9.55K
HD icon
92
Home Depot
HD
$349B
$331K 0.02%
962
-49
-5% -$17.9K
DAL icon
93
Delta Air Lines
DAL
$60.5B
$331K 0.02%
4,768
+223
+5% +$13.9K
SHOP icon
94
Shopify
SHOP
$191B
$328K 0.02%
2,040
-576
-22% -$92.5K
CMCSA icon
95
Comcast
CMCSA
$89.3B
$326K 0.02%
10,912
-311
-3% -$8.87K
SJM icon
96
J.M. Smucker
SJM
$12.7B
$326K 0.02%
3,330
-226
-6% -$23.4K
NSC icon
97
Norfolk Southern
NSC
$76.9B
$323K 0.02%
1,117
-64
-5% -$18.5K
VOO icon
98
Vanguard S&P 500 ETF
VOO
$1.01T
$322K 0.02%
513
-544
-51% -$338K
TXN icon
99
Texas Instruments
TXN
$254B
$320K 0.02%
1,842
+237
+15% +$40.6K
DIA icon
100
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46.3B
$308K 0.02%
640
– –
2 3
4
5 6

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HJGA
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CF
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BWC
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SFS
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AAP
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Main Street Research's Q4 2025 Portfolio in Review

As of Q4 2025, Main Street Research held 146 positions worth $1.75B, down 5.5% from $1.85B the previous quarter. Its ten largest holdings account for 45% of the portfolio.

Main Street Research withdrew a net $128M in Q4 2025, closing 17 positions and reducing 77 holdings. Its most notable exit was Mercado Libre, an estimated $37M position sold in full.

By sector, the portfolio is most concentrated in Technology at 36% of assets, up from 36% a quarter earlier, followed by Financials and Communication Services.

Against the trend, Main Street Research opened a new position in State Street SPDR S&P Biotech ETF worth $44M.

  • Main Street Research's largest Q4 2025 buy was State Street SPDR S&P Biotech ETF: 360,526 shares worth $44M.
  • Main Street Research added most to Johnson & Johnson in Q4 2025, an estimated $33.2M increase.
  • Main Street Research's biggest Q4 2025 reduction was Netflix, cutting an estimated $45.1M.
  • Main Street Research fully exited Mercado Libre in Q4 2025, selling an estimated $37M.
  • Main Street Research's ten largest holdings make up 45% of its $1.75B portfolio in Q4 2025.
  • Main Street Research opened 17 new positions and closed 17 in Q4 2025.
  • Main Street Research's portfolio value fell 5.5% quarter-over-quarter to $1.75B.

Based on Main Street Research's 13F filing for Q4 2025, filed 9 Feb 2026.