Mountaineer Partners Management, LLC
CIK 1730532 · View on SEC EDGAR ↗
- Portfolio value
- $1.7M
- Positions
- 1
- As of
- June 30, 2026
Portfolio value QoQ: -96.4% 13F does not disclose cash
- Top 10 holdings weight
- 100.00%
- Top 25 holdings weight
- 100.00%
- Positions above 1%
- 1
- Effective number of positions
- 1.0
Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)
Turnover Q2 2026: 0.0% Est. buys $0 · sells $46,990,473
Median holding: 4.0 quarters Tracked Q4 2024–Q2 2026 · 4.0% still held
- New positions
- 0
- Increased
- 0
- Decreased
- 0
- Closed
- 15
On this page
- Performance vs S&P How this manager's 13F portfolio performed against the S&P 500.
- Sector breakdown How the portfolio splits across market sectors.
- Portfolio Every stock this institution reports holding, from its latest 13F.
- Top moves The biggest position increases and decreases this quarter.
- Exited positions Positions the manager fully sold out of last quarter.
Performance vs S&P 500
Annualized: +41.6% · S&P 500: +18.0%
Approximates a buy-and-hold portfolio built from quarterly SEC 13F snapshots. Excludes cash, short positions, options/derivatives, and non-13(f) securities — reflects the disclosed long-equity book only, not total fund AUM. SEC filing lag is up to 45 days; this is not a real-time-copyable timing.
Priceable coverage: 99.0% · Options excluded: 0.0%
Sector breakdown
Full portfolio 1 positions
| Type | Streak | 8Q trend | |||||
|---|---|---|---|---|---|---|---|
| AMBP Ardagh Metal Packaging S.A. Ordinary Shares | $1,738,679 | 100.00% | 366,810 | $253,098 | |||
| No matches | |||||||
Top movers (QoQ)
| Security | Action | Shares Δ | Value Δ |
|---|---|---|---|
| AMBP | Price move only | +0 | +$253K |
Exited positions
Includes corporate events (mergers, delistings) — not all exits are sells
Closed positions reflect 13F reporting changes; for index managers these are often mechanical (delisting, M&A, index rebalancing), not active decisions.
| Security | Quarter | Shares before | Value before | Price since exit |
|---|---|---|---|---|
| HBM | June 30, 2026 | 594,845 | $12,432,261 | 26.1% |
| DHI | June 30, 2026 | 53,585 | $7,352,934 | -8.9% |
| NXE | March 31, 2026 | 408,571 | $3,758,853 | -7.7% |
| CCJ | June 30, 2026 | 33,307 | $3,617,473 | -0.2% |
| UEC | Dec. 31, 2025 | 251,964 | $3,361,200 | No longer tracked |
| CENX | June 30, 2026 | 40,786 | $2,393,730 | -2.3% |
| AA | June 30, 2026 | 33,557 | $2,225,836 | 1.8% |
| CRS | June 30, 2026 | 5,496 | $2,166,248 | -20.5% |
| SXT | June 30, 2026 | 24,938 | $2,155,641 | 8.2% |
| CSTM | June 30, 2026 | 87,265 | $2,144,974 | -14.3% |
| ATI | June 30, 2026 | 14,712 | $2,140,008 | 7.3% |
| KEX | June 30, 2026 | 16,102 | $2,139,634 | 4.2% |
| ECG | Dec. 31, 2025 | 24,838 | $2,129,859 | 46.9% |
| FCX | June 30, 2026 | 35,465 | $2,084,633 | 22.6% |
| ENTG | Dec. 31, 2025 | 21,744 | $2,010,450 | 71.9% |
| SARO | June 30, 2026 | 77,421 | $1,999,784 | -14.6% |
| GEV | March 31, 2025 | 5,998 | $1,972,922 | 217.8% |
| VSH | Dec. 31, 2025 | 127,969 | $1,957,926 | 118.4% |
| HMY | June 30, 2026 | 126,693 | $1,947,271 | 54.6% |
| MTRN | March 31, 2025 | 17,686 | $1,748,792 | 186.5% |
| DHI | June 30, 2025 | 12,517 | $1,591,286 | 15.0% |
| BLDR | June 30, 2026 | 17,760 | $1,462,181 | -21.1% |
| STNG | March 31, 2025 | 27,879 | $1,385,308 | 111.0% |
| SJT | March 31, 2026 | 168,427 | $946,560 | -39.1% |
| ULCC | June 30, 2026 | 206,194 | $727,865 | -26.5% |