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
QoQ vs Q4 2025
| # | Stock | Issuer | Price | Day % | 1Y Gr. | 5Y Gr. | Value | % of book | Δ shares (QoQ) | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | CENX | CENTURY ALUM CO | $63.46 | 5.56% | 207.83% | 312.91% | $34.3M | 17.02% | −24,478 | −4.0% |
| 2 | CSTM | CONSTELLIUM SE | $33.89 | -6.25% | 161.90% | 79.60% | $16.2M | 8.04% | −22,974 | −3.4% |
| 3 | AA | ALCOA CORP | $74.78 | 4.02% | 159.07% | 88.06% | $15.5M | 7.70% | −8,307 | −3.4% |
| 4 | HBM | HUDBAY MINERALS INC | $26.14 | 1.87% | 166.82% | 262.03% | $14.8M | 7.33% | −81,207 | −10.3% |
| 5 | FCX | FREEPORT MCMORAN INC | $63.37 | -9.07% | 54.55% | 78.15% | $14.2M | 7.04% | −25,354 | −9.5% |
| 6 | CRS | CARPENTER TECHNOLOGY CORP | $483.60 | -1.83% | 94.94% | 1250.10% | $14.2M | 7.03% | −761 | −2.1% |
| 7 | SXT | SENSIENT TECHNOLOGIES CORP | $114.22 | 1.81% | 18.74% | 42.60% | $13.5M | 6.72% | +39,494 | +33.7% |
| 8 | ATI | ATI INC | $179.24 | 0.99% | 111.27% | 764.44% | $13.4M | 6.63% | −37,125 | −28.8% |
| 9 | KEX | KIRBY CORP | $143.71 | 1.89% | 25.74% | 143.57% | $11.8M | 5.88% | +1,573 | +1.8% |
| 10 | SARO | STANDARDAERO INC | $25.61 | 0.23% | -16.12% | -10.64% | $10.5M | 5.23% | +39,937 | +10.9% |
| 11 | HMY | HARMONY GOLD MNG LTD | $15.71 | -9.24% | 9.97% | 308.77% | $10.2M | 5.09% | +666,735 | NEW |
| 12 | DHI | D R HORTON INC | $145.60 | -0.55% | 21.99% | 60.58% | $9.1M | 4.54% | +1,537 | +2.4% |
| 13 | BLDR | BUILDERS FIRSTSOURCE INC | $73.64 | -1.79% | -34.03% | 65.48% | $8.1M | 4.02% | +4,112 | +4.4% |
| 14 | AMBP | ARDAGH METAL PACKAGING S A | $3.91 | -0.63% | 5.08% | -40.71% | $7.6M | 3.78% | +408,602 | +27.8% |
| 15 | CCJ | CAMECO CORP | $103.44 | -9.28% | 71.53% | 488.33% | $4.6M | 2.29% | — | HELD |
| 16 | ULCC | FRONTIER GROUP HLDGS INC | $6.07 | 2.10% | 76.97% | -58.82% | $3.4M | 1.67% | — | HELD |
| 17 | NXE | NEXGEN ENERGY LTD | $10.28 | -9.90% | 60.62% | 142.45% | — | — | −538,042 | EXITED |
| 18 | SJT | SAN JUAN BASIN RTY TR | $3.69 | -5.38% | -42.16% | 4.69% | — | — | −732,351 | EXITED |
Source: SEC EDGAR · accession 0000919574-26-003280. 13F discloses long positions only — shorts, foreign equities, and options are excluded.