2026 Q2 Portfolio Activity
In 2026 Q2, Mountaineer Partners Management, LLC maintained a portfolio of 17 distinct positions. The most significant new addition was MIDDLEBY CORP, now representing 8.80% of the total fund value. They heavily accumulated shares in STANDARDAERO INC, increasing the position by 14.0%. Conversely, Mountaineer Partners Management, LLC completely exited their position in HUDBAY MINERALS INC.
Position History
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Total Positions
17
Quarter
2026 Q2
Top Holding
CENX (17.5%)
Top 10 Concentration
97.9%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-17 of 17
Mountaineer Partners Management, LLC Full Holdings List — 2026 Q2
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
CENX
CENTURY ALUM CO
|
Basic Materials | 17.54% | 17.02% |
#1
Prev: #1
|
6.5 |
—
|
-80,688 | -13.8% |
P
S
|
503,309 | $23,157,247 | 2021 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
SXT
SENSIENT TECHNO...
|
Basic Materials | 12.30% | 6.72% |
#2
5
Prev: #7
|
6.0 |
—
|
-24,857 | -15.9% |
P
S
|
131,727 | $16,240,622 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
CSTM
CONSTELLIUM SE
|
Basic Materials | 11.64% | 8.04% |
#3
1
Prev: #2
|
5.0 |
—
|
-176,360 | -26.8% |
P
S
|
482,130 | $15,365,483 | 2019 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
SARO
STANDARDAERO IN...
|
Industrials | 10.52% | 5.23% |
#4
6
Prev: #10
|
6.5 |
—
|
57,160 | 14.0% |
P
S
|
464,595 | $13,896,036 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
CRS
CARPENTER TECHN...
|
Industrials | 9.76% | 7.03% |
#5
1
Prev: #6
|
4.4 |
—
|
-15,035 | -41.8% |
P
S
|
20,894 | $12,888,255 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
ATI
ATI INC
|
Industrials | 9.02% | 6.63% |
#6
2
Prev: #8
|
3.6 |
—
|
-31,365 | -34.2% |
P
S
|
60,419 | $11,908,585 | 2018 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
MIDD
MIDDLEBY CORP
|
Industrials | 8.80% | — |
#7
Prev: #—
|
7.0 |
—
|
67,536 | — |
NEW
|
67,536 | $11,616,868 | 2020 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
AA
ALCOA CORP
|
Basic Materials | 8.22% | 7.70% |
#8
5
Prev: #3
|
3.8 |
—
|
-25,522 | -10.9% |
P
S
|
208,165 | $10,853,723 | 2022 Q1 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
HMY
HARMONY GOLD MN...
|
Basic Materials | 7.06% | 5.09% |
#9
2
Prev: #11
|
3.3 |
—
|
-53,786 | -8.1% |
P
S
|
612,949 | $9,322,955 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
CCJ
CAMECO CORP
|
Energy | 3.08% | 2.29% |
#10
5
Prev: #15
|
1.7 |
—
|
-2,521 | -5.9% |
P
S
|
39,903 | $4,064,520 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
AMBP
ARDAGH METAL PA...
|
Consumer Cyclical | 2.06% | 3.78% |
#11
3
Prev: #14
|
0.8 |
—
|
-1,303,875 | -69.4% |
P
S
|
574,207 | $2,721,741 | 2021 Q3 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
ULCC
FRONTIER GROUP ...
|
Industrials | 0.00% | 1.67% |
Sold All 😨
(Was: #16) |
0.0 |
—
|
-953,375 | -100.0% |
CLOSED
|
— | $— | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
BLDR
BUILDERS FIRSTS...
|
Industrials | 0.00% | 4.02% |
Sold All 😨
(Was: #13) |
0.0 |
—
|
-98,203 | -100.0% |
CLOSED
|
— | $— | 2018 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
DHI
D R HORTON INC
|
Consumer Cyclical | 0.00% | 4.54% |
Sold All 😨
(Was: #12) |
0.0 |
—
|
-66,541 | -100.0% |
CLOSED
|
— | $— | 2020 Q1 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
KEX
KIRBY CORP
|
Industrials | 0.00% | 5.88% |
Sold All 😨
(Was: #9) |
0.0 |
—
|
-89,017 | -100.0% |
CLOSED
|
— | $— | 2021 Q3 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
FCX
FREEPORT MCMORA...
|
Basic Materials | 0.00% | 7.04% |
Sold All 😨
(Was: #5) |
0.0 |
—
|
-240,973 | -100.0% |
CLOSED
|
— | $— | 2022 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
HBM
HUDBAY MINERALS...
|
Basic Materials | 0.00% | 7.33% |
Sold All 😨
(Was: #4) |
0.0 |
—
|
-706,040 | -100.0% |
CLOSED
|
— | $— | 2023 Q1 | 13F Filing | 2026-06-30 | 2026-08-13 |
Showing 1-17 of 17 holdings