Mountaineer Partners Management, LLC — 13F Holdings

2026 Q1  ·  18 Positions

2026 Q1 Portfolio Activity

In 2026 Q1, Mountaineer Partners Management, LLC maintained a portfolio of 18 distinct positions. The most significant new addition was HARMONY GOLD MNG LTD, now representing 5.09% of the total fund value. They heavily accumulated shares in SENSIENT TECHNOLOGIES CORP, increasing the position by 33.7%. Conversely, Mountaineer Partners Management, LLC completely exited their position in NEXGEN ENERGY LTD.
Position History hover any row below to update
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PCA Score Concentration Risk
Risk ENB
Total Positions
18
Quarter
2026 Q1
Top Holding
CENX (17.0%)
Top 10 Concentration
78.6%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-18 of 18

Mountaineer Partners Management, LLC Full Holdings List — 2026 Q1

Stock History Sector / Type Port % Prev % Rank / Prev Conviction
Freshness
Change % Change Influence Shares Mkt Value Avg Cost Price Held 1st Owned Source Source Date Date Reported
CENX
CENTURY ALUM CO
Basic Materials 17.02% 13.34% #1
Prev: #1
6.5
-24,478 -4.0%
P
S
583,997 $34,274,784 2021 Q4 13F Filing 2026-03-31 2026-05-15
CSTM
CONSTELLIUM SE
Basic Materials 8.04% 7.19% #2 4
Prev: #6
5.2
-22,974 -3.4%
P
S
658,490 $16,185,685 2019 Q4 13F Filing 2026-03-31 2026-05-15
AA
ALCOA CORP
Basic Materials 7.70% 7.20% #3 2
Prev: #5
4.6
-8,307 -3.4%
P
S
233,687 $15,500,459 2022 Q1 13F Filing 2026-03-31 2026-05-15
HBM
HUDBAY MINERALS...
Basic Materials 7.33% 8.74% #4 2
Prev: #2
3.9
-81,207 -10.3%
P
S
706,040 $14,756,237 2023 Q1 13F Filing 2026-03-31 2026-05-15
FCX
FREEPORT MCMORA...
Basic Materials 7.04% 7.57% #5 1
Prev: #4
3.8
-25,354 -9.5%
P
S
240,973 $14,164,393 2022 Q4 13F Filing 2026-03-31 2026-05-15
CRS
CARPENTER TECHN...
Industrials 7.03% 6.46% #6 1
Prev: #7
3.3
-761 -2.1%
P
S
35,929 $14,161,415 2025 Q2 13F Filing 2026-03-31 2026-05-15
SXT
SENSIENT TECHNO...
Basic Materials 6.72% 6.16% #7 1
Prev: #8
5.2
39,494 33.7%
P
S
156,584 $13,535,121 2025 Q4 13F Filing 2026-03-31 2026-05-15
ATI
ATI INC
Industrials 6.63% 8.28% #8 5
Prev: #3
2.7
-37,125 -28.8%
P
S
91,784 $13,350,901 2018 Q4 13F Filing 2026-03-31 2026-05-15
KEX
KIRBY CORP
Industrials 5.88% 5.39% #9 2
Prev: #11
2.9
1,573 1.8%
P
S
89,017 $11,828,579 2021 Q3 13F Filing 2026-03-31 2026-05-15
SARO
STANDARDAERO IN...
Industrials 5.23% 5.90% #10 1
Prev: #9
4.1
39,937 10.9%
P
S
407,435 $10,524,046 2025 Q2 13F Filing 2026-03-31 2026-05-15
HMY
HARMONY GOLD MN...
Basic Materials 5.09% #11
Prev: #—
5.5
666,735
NEW
666,735 $10,247,717 2026 Q1 13F Filing 2026-03-31 2026-05-15
DHI
D R HORTON INC
Consumer Cyclical 4.54% 5.24% #12
Prev: #12
2.3
1,537 2.4%
P
S
66,541 $9,130,756 2020 Q1 13F Filing 2026-03-31 2026-05-15
BLDR
BUILDERS FIRSTS...
Industrials 4.02% 5.42% #13 3
Prev: #10
2.1
4,112 4.4%
P
S
98,203 $8,085,053 2018 Q4 13F Filing 2026-03-31 2026-05-15
AMBP
ARDAGH METAL PA...
Consumer Cyclical 3.78% 3.37% #14 1
Prev: #13
4.0
408,602 27.8%
P
S
1,878,082 $7,606,233 2021 Q3 13F Filing 2026-03-31 2026-05-15
CCJ
CAMECO CORP
Energy 2.29% 2.17% #15 2
Prev: #17
1.9
no change no change
P
S
42,424 $4,607,670 2025 Q4 13F Filing 2026-03-31 2026-05-15
ULCC
FRONTIER GROUP ...
Industrials 1.67% 2.51% #16 1
Prev: #15
1.7
no change no change
P
S
953,375 $3,365,414 2025 Q4 13F Filing 2026-03-31 2026-05-15
SJT
SAN JUAN BASIN ...
Bond/Debt 0.00% 2.30%
Sold All 😨
(Was: #16)
0.0
-732,351 -100.0%
CLOSED
$— 2024 Q1 13F Filing 2026-03-31 2026-05-15
NXE
NEXGEN ENERGY L...
Energy 0.00% 2.77%
Sold All 😨
(Was: #14)
0.0
-538,042 -100.0%
CLOSED
$— 2021 Q3 13F Filing 2026-03-31 2026-05-15
Showing 1-18 of 18 holdings

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