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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
QCOM icon
126
Qualcomm
QCOM
$155B
$867K 0.1%
5,214
-109
-2% -$17.3K
MRSH
127
Marsh
MRSH
$90.5B
$839K 0.1%
4,164
+862
+26% +$177K
ISTB icon
128
iShares Core 1-5 Year USD Bond ETF
ISTB
$5.11B
$833K 0.1%
17,055
+110
+0.6% +$5.35K
PWZ icon
129
Invesco California AMT-Free Municipal Bond ETF
PWZ
$1.14B
$764K 0.09%
31,939
+2,599
+9% +$60.5K
MCO icon
130
Moody's
MCO
$82.8B
$746K 0.09%
1,565
+297
+23% +$150K
ORLY icon
131
O'Reilly Automotive
ORLY
$72.9B
$715K 0.08%
6,630
+669
+11% +$67.3K
CMF icon
132
iShares California Muni Bond ETF
CMF
$4.55B
$709K 0.08%
12,423
+948
+8% +$53K
IEMG icon
133
iShares Core MSCI Emerging Markets ETF
IEMG
$150B
$622K 0.07%
9,435
– –
VB icon
134
Vanguard Morningstar Small-Cap ETF
VB
$79.5B
$581K 0.07%
2,283
– –
LMT icon
135
Lockheed Martin
LMT
$134B
$576K 0.07%
1,154
-19,449
-94% -$8.82M
AVUV icon
136
Avantis US Small Cap Value ETF
AVUV
$30.3B
$571K 0.07%
5,732
+57
+1% +$5.51K
IBDR icon
137
iShares iBonds Dec 2026 Term Corporate ETF
IBDR
$3.44B
$556K 0.07%
22,870
+235
+1% +$5.69K
IBDS icon
138
iShares iBonds Dec 2027 Term Corporate ETF
IBDS
$3.84B
$555K 0.07%
22,810
+270
+1% +$6.55K
RTX icon
139
RTX Corp
RTX
$290B
$552K 0.06%
3,297
-120
-4% -$18.6K
DFAT icon
140
Dimensional US Targeted Value ETF
DFAT
$14.6B
$542K 0.06%
9,305
+21
+0.2% +$1.2K
THG icon
141
Hanover Insurance
THG
$8.1B
$483K 0.06%
2,657
– –
IBDQ
142
DELISTED
iShares iBonds Dec 2025 Term Corporate ETF
IBDQ
$444K 0.05%
17,625
+210
+1% +$5.28K
DFIV icon
143
Dimensional International Value ETF
DFIV
$21.3B
$437K 0.05%
9,475
+656
+7% +$29.3K
JTEK icon
144
JPMorgan US Tech Leaders ETF
JTEK
$4.1B
$412K 0.05%
4,475
+274
+7% +$23.7K
XOM icon
145
ExxonMobil
XOM
$644B
$394K 0.05%
3,497
-62
-2% -$6.89K
INMU icon
146
BlackRock Intermediate Muni Income Bond ETF
INMU
$540M
$387K 0.05%
16,157
-380
-2% -$8.95K
GOOGL icon
147
Alphabet (Google) Class A
GOOGL
$4.36T
$364K 0.04%
1,498
+20
+1% +$4.19K
FEX icon
148
First Trust Large Cap Core AlphaDEX Fund
FEX
$1.57B
$354K 0.04%
3,032
– –
VNQ icon
149
Vanguard Real Estate ETF
VNQ
$39.2B
$349K 0.04%
3,815
– –
VLUE icon
150
iShares MSCI USA Value Factor ETF
VLUE
$9.17B
$347K 0.04%
2,772
+57
+2% +$6.71K
3 4 5
6
7

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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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USAA
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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.