Latest Mountaineer Partners Management, LLC Stock Portfolio
$201Million– No. of Holdings #16
Mountaineer Partners Management, LLC Performance:
2026 Q1: 13.18%YTD: 13.18%2025: 32.01%
Performance for 2026 Q1 is 13.18%, and YTD is 13.18%, and 2025 is 32.01%.
About Mountaineer Partners Management, LLC and 13F Hedge Fund Stock Holdings
On 2026-05-15, the fund reported it's updated stock portfolio. In the 13F Holdings report, Mountaineer Partners Management, LLC reported an equity portfolio of $201.3 Millions as of 31 Mar, 2026.
The top stock holdings of Mountaineer Partners Management, LLC are CENX, CSTM, AA. The fund has invested 17% of it's portfolio in CENTURY ALUM CO and 8% of portfolio in CONSTELLIUM SE.
The fund managers got completely rid off NEXGEN ENERGY LTD (NXE) and SAN JUAN BASIN RTY TR (SJT) stocks. They significantly reduced their stock positions in ATI INC (ATI), HUDBAY MINERALS INC (HBM) and FREEPORT MCMORAN INC (FCX). Mountaineer Partners Management, LLC opened new stock positions in HARMONY GOLD MNG LTD (HMY). The fund showed a lot of confidence in some stocks as they added substantially to SENSIENT TECHNOLOGIES CORP (SXT), ARDAGH METAL PACKAGING S A (AMBP) and STANDARDAERO INC.
The top stock holdings of Mountaineer Partners Management, LLC are CENX, CSTM, AA. The fund has invested 17% of it's portfolio in CENTURY ALUM CO and 8% of portfolio in CONSTELLIUM SE.
The fund managers got completely rid off NEXGEN ENERGY LTD (NXE) and SAN JUAN BASIN RTY TR (SJT) stocks. They significantly reduced their stock positions in ATI INC (ATI), HUDBAY MINERALS INC (HBM) and FREEPORT MCMORAN INC (FCX). Mountaineer Partners Management, LLC opened new stock positions in HARMONY GOLD MNG LTD (HMY). The fund showed a lot of confidence in some stocks as they added substantially to SENSIENT TECHNOLOGIES CORP (SXT), ARDAGH METAL PACKAGING S A (AMBP) and STANDARDAERO INC.
Mountaineer Partners Management, LLC Equity Portfolio Value
Last Reported on: 15 May, 2026
Mountaineer Partners Management, LLC Annual Return Estimates Vs S&P 500
Our best estimate is that Mountaineer Partners Management, LLC made a return of 13.18% in the last quarter. In trailing 12 months, it's portfolio return was 65.93%.
- Performance
- S&P 500
New Buys
| Ticker | $ Bought |
|---|---|
| harmony gold mng ltd | 10,247,700 |
New stocks bought by Mountaineer Partners Management, LLC
Additions
| Ticker | % Inc. |
|---|---|
| sensient technologies corp | 33.73 |
| ardagh metal packaging s a | 27.81 |
| standardaero inc | 10.87 |
| builders firstsource inc | 4.37 |
| d r horton inc | 2.36 |
| kirby corp | 1.8 |
Additions to existing portfolio by Mountaineer Partners Management, LLC
Reductions
| Ticker | % Reduced |
|---|---|
| ati inc | -28.8 |
| hudbay minerals inc | -10.32 |
| freeport mcmoran inc | -9.52 |
| century alum co | -4.02 |
| alcoa corp | -3.43 |
| constellium se | -3.37 |
| carpenter technology corp | -2.07 |
Mountaineer Partners Management, LLC reduced stake in above stock
Sold off
| Ticker | $ Sold |
|---|---|
| san juan basin rty tr | -4,115,810 |
| nexgen energy ltd | -4,949,990 |
Mountaineer Partners Management, LLC got rid off the above stocks
Sector Distribution
Mountaineer Partners Management, LLC has about 38.5% of it's holdings in Basic Materials sector.
- Basic Materials
- Others
- Industrials
- Consumer Cyclical
| Sector | % |
|---|---|
| Basic Materials | 38.5 |
| Others | 31.8 |
| Industrials | 25.2 |
| Consumer Cyclical | 4.5 |
Market Cap. Distribution
Mountaineer Partners Management, LLC has about 29.3% of it's portfolio invested in the large-cap and mega-cap stocks.
- MID-CAP
- UNALLOCATED
- LARGE-CAP
- SMALL-CAP
| Category | % |
|---|---|
| MID-CAP | 37.3 |
| UNALLOCATED | 31.8 |
| LARGE-CAP | 29.3 |
| SMALL-CAP | 1.7 |
Stocks belong to which Index?
About 58.7% of the stocks held by Mountaineer Partners Management, LLC either belong to S&P 500 or RUSSELL 2000 index.
- RUSSELL 2000
- Others
- S&P 500
| Index | % |
|---|---|
| RUSSELL 2000 | 47.1 |
| Others | 41.3 |
| S&P 500 | 11.6 |
Mountaineer Partners Management, LLC Holdings Map
This heatmap illustrates the top 50 positions within the fund's portfolio.
Current Stock Holdings of Mountaineer Partners Management, LLC
Mountaineer Partners Management, LLC has 16 stocks in it's portfolio. About 78.6% of the portfolio is in top 10 stocks. BLDR proved to be the most loss making stock for the portfolio. CENX was the most profitable stock for Mountaineer Partners Management, LLC last quarter.
Last Reported on: 15 May, 2026| Ticker | Namesorted ascending | % Portfolio | Shares Held | $ Value | Type | % Change | Options | |
|---|---|---|---|---|---|---|---|---|
| AA | alcoa corp | 7.70 | 233,687 | 15,500,500 | reduced | -3.43 | ||
| AMBP | ardagh metal packaging s a | 3.78 | 1,878,080 | 7,606,230 | added | 27.81 | ||
| ATI | ati inc | 6.63 | 91,784 | 13,350,900 | reduced | -28.8 | ||
| BLDR | builders firstsource inc | 4.02 | 98,203 | 8,085,050 | added | 4.37 | ||
| CCJ | cameco corp | 2.29 | 42,424 | 4,607,670 | unchanged | 0.00 | ||
| CENX | century alum co | 17.02 | 583,997 | 34,274,800 | reduced | -4.02 | ||
| CRS | carpenter technology corp | 7.03 | 35,929 | 14,161,400 | reduced | -2.07 | ||
| CSTM | constellium se | 8.04 | 658,490 | 16,185,700 | reduced | -3.37 | ||
| DHI | d r horton inc | 4.54 | 66,541 | 9,130,760 | added | 2.36 | ||
| FCX | freeport mcmoran inc | 7.04 | 240,973 | 14,164,400 | reduced | -9.52 | ||
| HBM | hudbay minerals inc | 7.33 | 706,040 | 14,756,200 | reduced | -10.32 | ||
| HMY | harmony gold mng ltd | 5.09 | 666,735 | 10,247,700 | new | |||
| KEX | kirby corp | 5.88 | 89,017 | 11,828,600 | added | 1.8 | ||
| NXE | nexgen energy ltd | 0.00 | 0.00 | 0.00 | sold off | -100 | ||
| SJT | san juan basin rty tr | 0.00 | 0.00 | 0.00 | sold off | -100 | ||
| SXT | sensient technologies corp | 6.72 | 156,584 | 13,535,100 | added | 33.73 | ||
| ULCC | frontier group hldgs inc | 1.67 | 953,375 | 3,365,410 | unchanged | 0.00 | ||
| standardaero inc | 5.23 | 407,435 | 10,524,000 | added | 10.87 | |||