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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
+3.11%
1 Year Est. Return
+4.87%
3 Year Est. Return
+31.49%
5 Year Est. Return
+42.28%
10 Year Est. Return
–
AUM
$832M
AUM Growth
+$47M
Cap. Flow
+$35M
Cap. Flow %
4.2%
Top 10 Hldgs %
16.64%
Holding
170
New
7
Increased
136
Reduced
11
Closed
–

Top Buys

Rank Stock Value
1
JBND icon
JPMorgan Active Bond ETF
JBND
+$5.52M
2
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$2.61M
3
ROP icon
Roper Technologies
ROP
+$1.39M
4
APH icon
Amphenol
APH
+$1.13M
5
QQQ icon
Invesco QQQ Trust
QQQ
+$1.03M

Top Sells

Rank Stock Value
1
UPS icon
United Parcel Service
UPS
+$451K
2
DFAT icon
Dimensional US Targeted Value ETF
DFAT
+$255K
3
COR icon
Cencora
COR
+$171K
4
QUAL icon
iShares MSCI USA Quality Factor ETF
QUAL
+$140K
5
VLUE icon
iShares MSCI USA Value Factor ETF
VLUE
+$56.4K

Sector Composition

Rank Sector Weight
1 Technology 17.7%
2 Financials 14.24%
3 Industrials 13.46%
4 Consumer Staples 11.05%
5 Healthcare 10.81%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AAP icon
126
Advance Auto Parts
AAP
$3.53B
$694K 0.08%
14,930
+1,595
+12% +$63.9K
PWZ icon
127
Invesco California AMT-Free Municipal Bond ETF
PWZ
$1.14B
$685K 0.08%
29,340
+1,199
+4% +$28K
WSO icon
128
Watsco Inc
WSO
$13.2B
$674K 0.08%
1,526
+308
+25% +$143K
PLTR icon
129
Palantir
PLTR
$295B
$656K 0.08%
4,810
+260
+6% +$30.5K
CMF icon
130
iShares California Muni Bond ETF
CMF
$4.55B
$640K 0.08%
11,475
+324
+3% +$18K
MCO icon
131
Moody's
MCO
$83.7B
$636K 0.08%
1,268
+125
+11% +$57.9K
IEMG icon
132
iShares Core MSCI Emerging Markets ETF
IEMG
$144B
$566K 0.07%
9,435
– –
SHV icon
133
iShares 0-1 Year Treasury Bond ETF
SHV
$20.8B
$556K 0.07%
5,033
+2,061
+69% +$227K
IBDR icon
134
iShares iBonds Dec 2026 Term Corporate ETF
IBDR
$3.44B
$549K 0.07%
22,635
+286
+1% +$6.91K
IBDS icon
135
iShares iBonds Dec 2027 Term Corporate ETF
IBDS
$3.84B
$547K 0.07%
22,540
+128
+0.6% +$3.09K
VB icon
136
Vanguard Morningstar Small-Cap ETF
VB
$78.9B
$541K 0.07%
2,283
– –
ORLY icon
137
O'Reilly Automotive
ORLY
$75.1B
$537K 0.06%
5,961
+636
+12% +$58K
AVUV icon
138
Avantis US Small Cap Value ETF
AVUV
$30.3B
$517K 0.06%
5,675
+202
+4% +$17.4K
DFAT icon
139
Dimensional US Targeted Value ETF
DFAT
$14.7B
$501K 0.06%
9,284
-5,011
-35% -$255K
RTX icon
140
RTX Corp
RTX
$290B
$499K 0.06%
3,417
+493
+17% +$65.7K
THG icon
141
Hanover Insurance
THG
$8.13B
$451K 0.05%
2,657
– –
IBDQ
142
DELISTED
iShares iBonds Dec 2025 Term Corporate ETF
IBDQ
$439K 0.05%
17,415
+335
+2% +$8.41K
INMU icon
143
BlackRock Intermediate Muni Income Bond ETF
INMU
$541M
$388K 0.05%
16,537
-506
-3% -$11.8K
XOM icon
144
ExxonMobil
XOM
$650B
$384K 0.05%
+3,559
New +$380K
DFIV icon
145
Dimensional International Value ETF
DFIV
$20.9B
$378K 0.05%
8,819
+760
+9% +$31K
JTEK icon
146
JPMorgan US Tech Leaders ETF
JTEK
$3.9B
$355K 0.04%
+4,201
New +$309K
ET icon
147
Energy Transfer Partners
ET
$69.5B
$345K 0.04%
19,003
– –
VNQ icon
148
Vanguard Real Estate ETF
VNQ
$39.9B
$340K 0.04%
3,815
– –
FEX icon
149
First Trust Large Cap Core AlphaDEX Fund
FEX
$1.56B
$333K 0.04%
3,032
– –
OKE icon
150
Oneok
OKE
$56.7B
$308K 0.04%
3,767
– –
3 4 5
6
7

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Mattern Capital Management's Q2 2025 Portfolio in Review

As of Q2 2025, Mattern Capital Management held 170 positions worth $832M, up 6% from $785M the previous quarter. Its ten largest holdings account for 17% of the portfolio.

Mattern Capital Management deployed $35M of net new capital in Q2 2025, opening 7 new positions and adding to 136 existing holdings. Its largest new stake was JPMorgan Active Bond ETF: 104,228 shares worth $5.59M.

By sector, the portfolio is most concentrated in Technology at 18% of assets, up from 16% a quarter earlier, followed by Financials and Industrials.

On the sell side, the largest reduction was United Parcel Service, an estimated $451K trimmed.

  • Mattern Capital Management's largest Q2 2025 buy was JPMorgan Active Bond ETF: 104,228 shares worth $5.59M.
  • Mattern Capital Management added most to Roper Technologies in Q2 2025, an estimated $1.39M increase.
  • Mattern Capital Management's biggest Q2 2025 reduction was United Parcel Service, cutting an estimated $451K.
  • Mattern Capital Management's ten largest holdings make up 17% of its $832M portfolio in Q2 2025.
  • Mattern Capital Management opened 7 new positions and closed 0 in Q2 2025.
  • Mattern Capital Management's portfolio value rose 6% quarter-over-quarter to $832M.

Based on Mattern Capital Management's 13F filing for Q2 2025, filed 21 Jul 2025.