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MCM

Mattern Capital Management Portfolio holdings

AUM $857M
1-Year Est. Return 4.87%
This Fund
S&P 500
This Quarter Est. Return
+2.4%
1 Year Est. Return
+4.87%
3 Year Est. Return
+31.49%
5 Year Est. Return
+42.28%
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
VOO icon
76
Vanguard S&P 500 ETF
VOO
$979B
$6.41M 0.75%
10,470
– –
AVIG icon
77
Avantis Core Fixed Income ETF
AVIG
$1.94B
$5.98M 0.7%
142,041
+247
+0.2% +$10.3K
FDS icon
78
Factset
FDS
$9.36B
$5.85M 0.69%
20,420
+545
+3% +$208K
JBND icon
79
JPMorgan Active Bond ETF
JBND
$8.42B
$5.71M 0.67%
105,351
+1,123
+1% +$60.2K
BF.B icon
80
Brown-Forman Class B
BF.B
$13.2B
$5.25M 0.62%
193,786
+4,998
+3% +$145K
QQQ icon
81
Invesco QQQ Trust
QQQ
$453B
$4.28M 0.5%
7,133
-44
-0.6% -$25.2K
AMZN icon
82
Amazon
AMZN
$2.92T
$3.19M 0.38%
14,542
+659
+5% +$149K
DIA icon
83
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$45.8B
$2.92M 0.34%
6,297
– –
GOOG icon
84
Alphabet (Google) Class C
GOOG
$4.36T
$2.81M 0.33%
11,520
+427
+4% +$89.8K
TSLA icon
85
Tesla
TSLA
$1.23T
$2.37M 0.28%
5,319
+350
+7% +$121K
SHY icon
86
iShares 1-3 Year Treasury Bond ETF
SHY
$25.5B
$2.23M 0.26%
26,929
+10,584
+65% +$875K
IWD icon
87
iShares Russell 1000 Value ETF
IWD
$82.2B
$2.04M 0.24%
10,013
– –
VTEB icon
88
Vanguard Tax-Exempt Bond Index Fund
VTEB
$45.1B
$2.03M 0.24%
40,496
+1,246
+3% +$61.2K
VNLA icon
89
Janus Henderson Short Duration Income ETF
VNLA
$3.32B
$1.9M 0.22%
38,578
+11,589
+43% +$570K
TSM icon
90
TSMC
TSM
$2.1T
$1.83M 0.22%
6,552
+686
+12% +$168K
DECK icon
91
Deckers Outdoor
DECK
$13.2B
$1.68M 0.2%
16,554
+377
+2% +$41.1K
NVDA icon
92
NVIDIA
NVDA
$4.86T
$1.61M 0.19%
8,618
+590
+7% +$103K
NFLX icon
93
Netflix
NFLX
$299B
$1.56M 0.18%
13,050
+770
+6% +$94K
CVX icon
94
Chevron
CVX
$392B
$1.54M 0.18%
9,927
+1,731
+21% +$268K
JPM icon
95
JPMorgan Chase
JPM
$935B
$1.52M 0.18%
4,819
+350
+8% +$104K
AVLV icon
96
Avantis US Large Cap Value ETF
AVLV
$18B
$1.51M 0.18%
20,832
+534
+3% +$37.7K
SPY icon
97
State Street SPDR S&P 500 ETF Trust
SPY
$790B
$1.49M 0.17%
2,231
-334
-13% -$214K
IWF icon
98
iShares Russell 1000 Growth ETF
IWF
$121B
$1.48M 0.17%
12,640
– –
COP icon
99
ConocoPhillips
COP
$147B
$1.47M 0.17%
15,503
+2,968
+24% +$281K
VTI icon
100
Vanguard Morningstar Total Stock Market ETF
VTI
$660B
$1.44M 0.17%
4,382
– –
2 3
4
5 6

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NOCM
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OAM
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BCM
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AWM
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TSS
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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.