Institutional
Mountaineer Partners Management, LLC
CIK 0001730532
$201.3M
Reported AUM
16
Positions
Q1 2026
Period
2026-05-15
Filed
The Brief · Mountaineer Partners Management, LLC · Q1 2026
AI · grounded in 13F
Mountaineer Partners Management, LLC established a new position in HMY valued at $10.2M. The fund closed its positions in NXE, reducing exposure by $4.9M, and SJT, reducing exposure by $4.1M. Additionally, the fund increased its stake in SXT by 33.7%.
Portfolio · Q1 2026
Top holdings
| # | Stock | Issuer | Price | Day % | 1Y Gr. | 5Y Gr. | Value | % of book | Δ shares (QoQ) | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | CENX | CENTURY ALUM CO | $44.77 | -0.25% | 118.95% | 249.61% | $34.3M | 17.02% | — | HELD |
| 2 | CSTM | CONSTELLIUM SE | $27.78 | -2.77% | 110.14% | 37.39% | $16.2M | 8.04% | — | HELD |
| 3 | AA | ALCOA CORP | $45.26 | 0.64% | 61.47% | 7.54% | $15.5M | 7.70% | — | HELD |
| 4 | HBM | HUDBAY MINERALS INC | $22.75 | 0.00% | 151.25% | 275.62% | $14.8M | 7.33% | — | HELD |
| 5 | FCX | FREEPORT MCMORAN INC | $62.63 | -1.28% | 60.18% | 86.79% | $14.2M | 7.04% | — | HELD |
| 6 | CRS | CARPENTER TECHNOLOGY CORP | $519.66 | 3.17% | 95.93% | 1499.23% | $14.2M | 7.03% | — | HELD |
| 7 | SXT | SENSIENT TECHNOLOGIES CORP | $123.67 | -0.23% | 12.74% | 57.45% | $13.5M | 6.72% | — | HELD |
| 8 | ATI | ATI INC | $187.44 | 3.05% | 144.32% | 949.50% | $13.4M | 6.63% | — | HELD |
| 9 | KEX | KIRBY CORP | $131.14 | -0.91% | 37.32% | 144.71% | $11.8M | 5.88% | — | HELD |
| 10 | SARO | STANDARDAERO INC | $29.31 | 1.14% | 3.66% | 0.77% | $10.5M | 5.23% | — | HELD |
| 11 | HMY | HARMONY GOLD MNG LTD | $15.75 | -2.48% | 12.89% | 344.50% | $10.2M | 5.09% | — | HELD |
| 12 | DHI | D R HORTON INC | $143.06 | -1.70% | -3.62% | 57.29% | $9.1M | 4.54% | — | HELD |
| 13 | BLDR | BUILDERS FIRSTSOURCE INC | $66.44 | 0.65% | -48.96% | 24.68% | $8.1M | 4.02% | — | HELD |
| 14 | AMBP | ARDAGH METAL PACKAGING S A | $4.73 | -2.47% | 30.34% | -27.01% | $7.6M | 3.78% | — | HELD |
| 15 | CCJ | CAMECO CORP | $86.38 | -2.10% | 19.46% | 375.31% | $4.6M | 2.29% | — | HELD |
| 16 | ULCC | FRONTIER GROUP HLDGS INC | $6.75 | -3.30% | 70.03% | -55.97% | $3.4M | 1.67% | — | HELD |
Source: SEC EDGAR · accession 0000919574-26-003280. 13F discloses long positions only — shorts, foreign equities, and options are excluded.