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MCM

Mattern Capital Management Portfolio holdings

AUM $835M
1-Year Est. Return 3.68%
This Fund
S&P 500
This Quarter Est. Return
+2.4%
1 Year Est. Return
+3.68%
3 Year Est. Return
+30.74%
5 Year Est. Return
+44.06%
10 Year Est. Return
–
AUM
$851M
AUM Growth
+$18.2M
Cap. Flow
+$5.92M
Cap. Flow %
0.7%
Top 10 Hldgs %
16.99%
Holding
174
New
4
Increased
88
Reduced
57
Closed
2

Top Buys

Rank Stock Value
1
CEG icon
Constellation Energy
CEG
+$7.36M
2
INTU icon
Intuit
INTU
+$6.46M
3
LLY icon
Eli Lilly
LLY
+$2.73M
4
ROP icon
Roper Technologies
ROP
+$2M
5
MA icon
Mastercard
MA
+$1.86M

Top Sells

Rank Stock Value
1
UNP icon
Union Pacific
UNP
+$9.1M
2
LMT icon
Lockheed Martin
LMT
+$8.82M
3
TROW icon
T. Rowe Price
TROW
+$8.52M
4
AVGO icon
Broadcom
AVGO
+$1.47M
5
COR icon
Cencora
COR
+$862K

Sector Composition

Rank Sector Weight
1 Technology 18.91%
2 Financials 12.93%
3 Healthcare 11.4%
4 Industrials 11.34%
5 Consumer Staples 10.38%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AAPL icon
1
Apple
AAPL
$4.9T
$20.1M 2.37%
79,018
-1,734
-2% -$392K
MSFT icon
2
Microsoft
MSFT
$2.93T
$19.3M 2.27%
37,220
-856
-2% -$437K
WMT icon
3
Walmart Inc
WMT
$909B
$14.6M 1.71%
141,219
-3,159
-2% -$314K
COR icon
4
Cencora
COR
$59.9B
$13.8M 1.62%
44,049
-2,928
-6% -$862K
LOW icon
5
Lowe's Companies
LOW
$117B
$13.3M 1.56%
52,735
-657
-1% -$161K
AVGO icon
6
Broadcom
AVGO
$1.76T
$13M 1.52%
39,314
-4,795
-11% -$1.47M
COST icon
7
Costco
COST
$417B
$12.8M 1.51%
13,875
-243
-2% -$233K
ADI icon
8
Analog Devices
ADI
$183B
$12.7M 1.49%
51,552
+4,612
+10% +$1.11M
PSX icon
9
Phillips 66
PSX
$82.9B
$12.7M 1.49%
93,087
-1,111
-1% -$142K
BRO icon
10
Brown & Brown
BRO
$23.5B
$12.4M 1.46%
132,379
+13,181
+11% +$1.28M
NEE icon
11
NextEra Energy
NEE
$185B
$12.1M 1.42%
160,040
+17,544
+12% +$1.28M
LHX icon
12
L3Harris
LHX
$52.5B
$12.1M 1.42%
39,483
-819
-2% -$224K
GD icon
13
General Dynamics
GD
$99.7B
$11.9M 1.4%
34,949
-648
-2% -$204K
BLK icon
14
Blackrock
BLK
$166B
$11.8M 1.38%
10,103
+23
+0.2% +$25.7K
AFL icon
15
Aflac
AFL
$63.5B
$11.6M 1.37%
104,203
-856
-0.8% -$89.9K
XYL icon
16
Xylem
XYL
$29.2B
$11.6M 1.36%
78,312
-1,471
-2% -$204K
GWW icon
17
W.W. Grainger
GWW
$65.9B
$11.1M 1.31%
11,671
-141
-1% -$142K
LIN icon
18
Linde
LIN
$237B
$11.1M 1.3%
23,367
-257
-1% -$122K
TSCO icon
19
Tractor Supply
TSCO
$16B
$10.9M 1.29%
192,436
-2,589
-1% -$153K
HD icon
20
Home Depot
HD
$338B
$10.8M 1.27%
26,763
-267
-1% -$105K
AMGN icon
21
Amgen
AMGN
$198B
$10.8M 1.27%
38,304
+4,411
+13% +$1.28M
CSCO icon
22
Cisco
CSCO
$441B
$10.3M 1.21%
150,740
-12,106
-7% -$825K
ATO icon
23
Atmos Energy
ATO
$29.7B
$10.3M 1.21%
60,066
-1,524
-2% -$246K
SPGI icon
24
S&P Global
SPGI
$133B
$10.2M 1.2%
20,917
-249
-1% -$133K
CB icon
25
Chubb
CB
$137B
$10.2M 1.19%
36,001
-332
-0.9% -$91.4K
1
2 3 4 5

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FM
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FPGK
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DLP
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SEM
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NWM
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AWA
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ES
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Mattern Capital Management's Q3 2025 Portfolio in Review

As of Q3 2025, Mattern Capital Management held 174 positions worth $851M, up 2.2% from $832M the previous quarter. Its ten largest holdings account for 17% of the portfolio.

Trading was light in Q3 2025: portfolio turnover was 3.4%. Mattern Capital Management opened 4 new positions and exited 2, leaving the 174-position portfolio largely intact.

By sector, the portfolio is most concentrated in Technology at 19% of assets, up from 18% a quarter earlier, followed by Financials and Healthcare.

  • Mattern Capital Management's largest Q3 2025 buy was Constellation Energy: 22,802 shares worth $7.5M.
  • Mattern Capital Management added most to Intuit in Q3 2025, an estimated $6.46M increase.
  • Mattern Capital Management's biggest Q3 2025 reduction was Lockheed Martin, cutting an estimated $8.82M.
  • Mattern Capital Management fully exited Union Pacific in Q3 2025, selling an estimated $9.1M.
  • Mattern Capital Management's ten largest holdings make up 17% of its $851M portfolio in Q3 2025.
  • Mattern Capital Management opened 4 new positions and closed 2 in Q3 2025.
  • Mattern Capital Management's portfolio value rose 2.2% quarter-over-quarter to $851M.

Based on Mattern Capital Management's 13F filing for Q3 2025, filed 21 Oct 2025.