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MPM
Mountaineer Partners Management Portfolio holdings
AUM
$137M
Turnover
41.18%
1-Year Est. Return
91.53%
This Fund
S&P 500
This Quarter Est. Return
+16.26%
1 Year Est. Return
+91.53%
3 Year Est. Return
+158.1%
5 Year Est. Return
+343.93%
10 Year Est. Return
–
AUM
$137M
AUM Growth
-$63.8M
(-32%)
Cap. Flow
-$78.9M
Cap. Flow % of AUM
Cap. Flow %
-57.38%
Top 10 Holdings %
Top 10 Hldgs %
97.04%
Holding
17
New
1
Increased
1
Reduced
9
Closed
6
Avg Time Held
1.6
years
Top 10 Avg Time Held
1
year
Top 20 Avg Time Held
1.6
years
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Middleby
MIDD
|
+$10.2M |
| 2 |
StandardAero Inc
SARO
|
+$1.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Hudbay
HBM
|
+$14.8M |
| 2 |
Freeport-McMoran
FCX
|
+$14.2M |
| 3 |
Kirby Corp
KEX
|
+$11.8M |
| 4 |
D.R. Horton
DHI
|
+$9.13M |
| 5 |
Builders FirstSource
BLDR
|
+$8.09M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Materials | 54.51% |
| 2 | Industrials | 36.59% |
| 3 | Consumer Discretionary | 5.94% |
| 4 | Energy | 2.96% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
1
Century Aluminum
CENX
$3.4B
| $23.2M | 16.84% |
503,309
-80,688
| -14% | -$4.85M |
2022 Q4
14 quarters
|
|
2
Sensient Technologies
SXT
$5.67B
| $16.2M | 11.81% |
131,727
-24,857
| -16% | -$2.77M |
2025 Q4
2 quarters
|
|
3
Constellium
CSTM
$3.45B
| $15.4M | 11.18% |
482,130
-176,360
| -27% | -$5.69M |
2023 Q1
13 quarters
|
|
|
4
StandardAero Inc
SARO
$7.07B
| $13.9M | 10.11% |
464,595
+57,160
| +14% | +$1.5M |
2025 Q2
4 quarters
|
|
5
Carpenter Technology
CRS
$18.8B
| $12.9M | 9.37% |
20,894
-15,035
| -42% | -$7.08M |
2025 Q2
4 quarters
|
|
6
ATI
ATI
$25.8B
| $11.9M | 8.66% |
60,419
-31,365
| -34% | -$5.32M |
2023 Q2
12 quarters
|
|
|
7
Middleby
MIDD
$4.87B
| $11.6M | 8.45% |
+67,536
| New | +$10.2M |
2026 Q2
0 quarters
|
|
8
Alcoa
AA
$11B
| $10.9M | 7.89% |
208,165
-25,522
| -11% | -$1.71M |
2023 Q1
13 quarters
|
|
9
Harmony Gold Mining
HMY
$10.5B
| $9.32M | 6.78% |
612,949
-53,786
| -8% | -$894K |
2026 Q1
1 quarter
|
|
10
Ardagh Metal Packaging
AMBP
$2.76B
| $8.16M | 5.94% |
1,722,234
-155,848
| -8% | -$640K |
2024 Q4
6 quarters
|
|
11
Cameco
CCJ
$35.1B
| $4.06M | 2.96% |
39,903
-2,521
| -6% | -$283K |
2025 Q4
2 quarters
|
|
|
12
Builders FirstSource
BLDR
$5.7B
| – | – |
-98,203
| Closed | -$8.09M | – |
|
|
13
D.R. Horton
DHI
$37.8B
| – | – |
-66,541
| Closed | -$9.13M | – |
|
|
14
Freeport-McMoran
FCX
$100B
| – | – |
-240,973
| Closed | -$14.2M | – |
|
|
15
Hudbay
HBM
$10.6B
| – | – |
-706,040
| Closed | -$14.8M | – |
|
|
16
Kirby Corp
KEX
$7.2B
| – | – |
-89,017
| Closed | -$11.8M | – |
|
17
Frontier Group Holdings
ULCC
$1.06B
| – | – |
-953,375
| Closed | -$3.37M | – |
|
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Mountaineer Partners Management's Q2 2026 Portfolio in Review
As of Q2 2026, Mountaineer Partners Management held 17 positions worth $137M, down 32% from $201M the previous quarter. Its ten largest holdings account for 97% of the portfolio.
Mountaineer Partners Management withdrew a net $78.9M in Q2 2026, closing 6 positions and reducing 9 holdings. Its most notable exit was Hudbay, an estimated $14.8M position sold in full.
By sector, the portfolio is most concentrated in Materials at 55% of assets, down from 59% a quarter earlier, followed by Industrials and Consumer Discretionary.
Against the trend, Mountaineer Partners Management opened a new position in Middleby worth $11.6M.
- Mountaineer Partners Management's largest Q2 2026 buy was Middleby: 67,536 shares worth $11.6M.
- Mountaineer Partners Management added most to StandardAero Inc in Q2 2026, an estimated $1.5M increase.
- Mountaineer Partners Management's biggest Q2 2026 reduction was Carpenter Technology, cutting an estimated $7.08M.
- Mountaineer Partners Management fully exited Hudbay in Q2 2026, selling an estimated $14.8M.
- Mountaineer Partners Management's ten largest holdings make up 97% of its $137M portfolio in Q2 2026.
- Mountaineer Partners Management opened 1 new position and closed 6 in Q2 2026.
- Mountaineer Partners Management's portfolio value fell 32% quarter-over-quarter to $137M.
Based on Mountaineer Partners Management's 13F filing for Q2 2026, filed 13 Aug 2026.