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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
APH icon
26
Amphenol
APH
$185B
$10M 1.18%
80,906
+10,827
+15% +$1.19M
ADP icon
27
Automatic Data Processing
ADP
$109B
$10M 1.18%
34,056
-269
-0.8% -$81K
BR icon
28
Broadridge
BR
$18.4B
$9.97M 1.17%
41,854
-405
-1% -$101K
SHW icon
29
Sherwin-Williams
SHW
$83.5B
$9.93M 1.17%
28,691
-202
-0.7% -$71.2K
ECL icon
30
Ecolab
ECL
$79.8B
$9.81M 1.15%
35,811
-500
-1% -$136K
EMR icon
31
Emerson Electric
EMR
$81.6B
$9.74M 1.15%
74,263
-5,558
-7% -$758K
WEC icon
32
WEC Energy
WEC
$36.3B
$9.62M 1.13%
83,986
-767
-0.9% -$83.1K
JNJ icon
33
Johnson & Johnson
JNJ
$640B
$9.58M 1.13%
51,651
-500
-1% -$85.7K
MDT icon
34
Medtronic
MDT
$112B
$9.46M 1.11%
99,311
-895
-0.9% -$82.3K
SYK icon
35
Stryker
SYK
$135B
$9.45M 1.11%
25,567
-397
-2% -$153K
CTAS icon
36
Cintas
CTAS
$86.6B
$9.26M 1.09%
45,120
-166
-0.4% -$35.5K
ABT icon
37
Abbott
ABT
$187B
$9.2M 1.08%
68,679
-2,468
-3% -$324K
ITW icon
38
Illinois Tool Works
ITW
$84.1B
$9.1M 1.07%
34,915
-177
-0.5% -$46.1K
APD icon
39
Air Products & Chemicals
APD
$65.5B
$9.08M 1.07%
33,288
+246
+0.7% +$71.2K
MCD icon
40
McDonald's
MCD
$193B
$9.05M 1.06%
29,796
-174
-0.6% -$53K
PH icon
41
Parker-Hannifin
PH
$120B
$8.96M 1.05%
11,819
+287
+2% +$212K
ACN icon
42
Accenture
ACN
$106B
$8.9M 1.05%
36,084
+6,254
+21% +$1.63M
SBUX icon
43
Starbucks
SBUX
$119B
$8.87M 1.04%
104,889
+619
+0.6% +$55.4K
ICE icon
44
Intercontinental Exchange
ICE
$87.2B
$8.8M 1.04%
52,250
-2,608
-5% -$466K
HON icon
45
Honeywell
HON
$76.4B
$8.8M 1.03%
44,370
-16
-0% -$3.34K
TXN icon
46
Texas Instruments
TXN
$248B
$8.75M 1.03%
47,629
+123
+0.3% +$24K
CMS icon
47
CMS Energy
CMS
$23.3B
$8.69M 1.02%
118,582
+219
+0.2% +$15.7K
PLD icon
48
Prologis
PLD
$136B
$8.57M 1.01%
74,832
-44
-0.1% -$4.84K
CBSH icon
49
Commerce Bancshares
CBSH
$8.68B
$8.43M 0.99%
148,080
-835
-0.6% -$49.1K
AWK icon
50
American Water Works
AWK
$27B
$8.37M 0.98%
60,163
+23
+0% +$3.25K
1
2
3 4 5

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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.