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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
ET icon
151
Energy Transfer Partners
ET
$70.2B
$326K 0.04%
19,003
– –
VIG icon
152
Vanguard Dividend Appreciation ETF
VIG
$112B
$318K 0.04%
1,474
-6
-0.4% -$1.26K
ITOT icon
153
iShares Core S&P Total US Stock Market ETF
ITOT
$94.5B
$316K 0.04%
2,168
– –
IBTG icon
154
iShares iBonds Dec 2026 Term Treasury ETF
IBTG
$2.24B
$289K 0.03%
12,606
– –
SUB icon
155
iShares Short-Term National Muni Bond ETF
SUB
$11.4B
$284K 0.03%
2,663
-9
-0.3% -$961
NVS icon
156
Novartis
NVS
$298B
$284K 0.03%
2,211
-5
-0.2% -$610
IBTH icon
157
iShares iBonds Dec 2027 Term Treasury ETF
IBTH
$2.25B
$277K 0.03%
12,320
+290
+2% +$6.51K
OKE icon
158
Oneok
OKE
$57.1B
$275K 0.03%
3,767
– –
IBTF
159
DELISTED
iShares iBonds Dec 2025 Term Treasury ETF
IBTF
$274K 0.03%
11,720
– –
DFEV icon
160
Dimensional Emerging Markets Value ETF
DFEV
$1.93B
$273K 0.03%
8,555
+1,042
+14% +$32.3K
EPD icon
161
Enterprise Products Partners
EPD
$82.3B
$250K 0.03%
8,002
– –
DGRO icon
162
iShares Core Dividend Growth ETF
DGRO
$42.8B
$250K 0.03%
3,674
– –
PAA icon
163
Plains All American Pipeline
PAA
$17.3B
$232K 0.03%
13,602
– –
IVW icon
164
iShares S&P 500 Growth ETF
IVW
$73.9B
$226K 0.03%
1,875
-79
-4% -$9.09K
VO icon
165
Vanguard Morningstar Mid-Cap ETF
VO
$107B
$226K 0.03%
3,080
– –
MRK icon
166
Merck
MRK
$323B
$220K 0.03%
2,623
-753
-22% -$62K
IVV icon
167
iShares Core S&P 500 ETF
IVV
$880B
$216K 0.03%
+322
New +$207K
WES icon
168
Western Midstream Partners
WES
$19.2B
$215K 0.03%
5,475
– –
MPLX icon
169
MPLX
MPLX
$59.3B
$215K 0.03%
4,300
– –
KMI icon
170
Kinder Morgan
KMI
$71.7B
$203K 0.02%
7,180
-185
-3% -$5.06K
EZU icon
171
iShare MSCI Eurozone ETF
EZU
$9.65B
$203K 0.02%
+3,280
New +$197K
TROW icon
172
T. Rowe Price
TROW
$24.1B
$203K 0.02%
1,976
-81,091
-98% -$8.52M
UNP icon
173
Union Pacific
UNP
$174B
– –
-39,549
Closed -$9.1M
UPS icon
174
United Parcel Service
UPS
$89.1B
– –
-2,116
Closed -$214K
3 4 5 6
7

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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.